versão On-line ISSN 1816-7950
Water SA v.38 n.2 Pretoria 2012
JR McCaffertyI; BR EllenderI; OLF WeylII, *; PJ BritzI
IDepartment of Ichthyology and Fisheries Science, Rhodes University, Grahamstown 6139, South Africa
IISouth African Institute for Aquatic Biodiversity (SAIAB), Private Bag 1015, Grahamstown 6139, South Africa
The contribution of inland fisheries to food security, livelihood provision, poverty alleviation, and economic development in developing African countries is well documented, but there is surprisingly little literature on the history, current status and potential of South Africa's inland fishery resources. This presents a constraint to the management and sustainable development of inland fisheries. A literature review of peer-reviewed and grey literature was thus undertaken which is presented as a synthesis of knowledge on inland fisheries in South Africa. We track the chronology of literary themes on inland fisheries from the colonial era to the present, provide an overview of the recreational, subsistence and commercial sub-sectors, the production potential of inland waters, interventions to promote fishery development, and attempts to value inland fisheries. The review summarises the current state of knowledge on fisheries resources, outlines potential sources of data, highlights relevant and important information, and identifies knowledge gaps. The literature survey reveals an urgent need for research covering the biological, social, economic and governance aspects, if inland fisheries are to be developed in a rational and sustainable manner which promotes South Africa's national policy goals.
Keywords: yield, alien, angling, CPUE, impact, value of inland fisheries, information, sectors, potential
The latest comprehensive assessment of global inland fisheries in 2003 estimated the total harvest at 8.7 million tons, which accounted for 6% of global fish production (FAO, 2003). While the inland fisheries contribution on a global scale is relatively small, Neiland et al. (2005) caution that simple comparisons of gross production can be misleading because inland fisheries in many developing countries and regions generate a wide variety of benefits for millions of people. Such benefits include food security, the provision of livelihoods, and contributions to wealth and wellbeing of communities engaged in a variety of fisheries-linked activities that collectively contribute significantly to both rural and national economies (Kapetsky and Petr, 1984; Van der Knaap, 1994; Geheb and Binns, 1997; Sarch and Allison, 2000; Allison et al., 2002; Allison, 2005).
In Africa, the role of inland fisheries as vehicles for rural development, poverty reduction, food security, livelihood provision and regional economic development are being increasingly recognised (Marshall and Maes, 1994; FAO, 2003), and fisheries have been identified as a priority investment area by the African Union (NEPAD, 2005).
In South Africa, there is also an increasing interest in developing the economic and social opportunities offered by inland capture fisheries. Such development will, however, need to take into consideration the dynamic nature of the current users of the fish resources, which are mainly subsistence and recreational anglers (Weyl et al., 2007; Ellender et al., 2009; 2010b). Commercial fisheries remain poorly developed despite several attempts to develop these fisheries, dating back to the 1970s (Jackson, 1980; Koch and Schoonbee, 1980; Allanson and Jackson, 1983; Cochrane, 1987; Andrew, 2001). Possible reasons for the lack of inland fisheries development are cited as: a paucity of natural water bodies where a culture of fishing may have developed; a lack of access to fishing gear; market resistance to freshwater fish; availability of relatively cheap marine fish products; and a lack of knowledge of the potential of the resource (Andrew, 2001; Weyl et al., 2007). Significantly, South Africa has never had an inland fisheries policy, and the potential socio-economic value of fisheries has not been recognised in South Africa's water resource management policies (Weyl et al., 2007). As a result, the responsibility for access to dams and their fishery resources is currently fragmented between government departments and is not directed by a coherent policy. This lack of a national policy was, and remains, a major bottleneck in the development of inland fisheries (Weyl et al., 2007).
Fishery management was historically the mandate of the provincial nature conservation authorities, who managed the resource primarily for recreational purposes in terms of South Africa's environmental legislation (Hey, 1977). As the conservation departments did not have a development mandate, there was not much capacity to support the development of livelihoods based on fisheries, although a number of projects were promoted in some provinces. This, coupled with a low direct value of freshwater fish (ZAR 6/kg, Ellender et al., 2010b), and in some cases apartheid exclusion of people from accessing resources, has resulted in South African inland fisheries being utilised primarily by recreational anglers (Weyl et al., 2007). More recently, however, there is evidence of increasing utilisation of inland fisheries by subsistence anglers (Van der Waal et al., 2000; Ellender et al., 2009). While subsistence anglers from local communities are generally regarded as having a legitimate claim to fish, in the absence of a supporting governance framework their activities are in many cases illegal. This has led to conflicts between water users on a number of impoundments (Weyl et al., 2007; Weyl et al., 2010a).
South Africa's national policy objectives in respect of natural resource use include: food security; economic empowerment; tourism development; optimal economic benefit from water; and poverty eradication (ECA, 1989; NEMA, 1998; NWA, 1998). Given these objectives, the formulation of an inland fishery policy needs to take into account the potential of the different fisheries sectors (recreational, subsistence and commercial), the long-term sustainable use of fish resources, as well as the promotion of the economic and social wellbeing of the fishers (Charles, 2001). Consequently, the development of fisheries must be guided by policy, management protocols and institutional arrangements that ensure equitable resource access, biological sustainability and optimisation of economic benefits for both local communities and the national economy.
Policy and planning thus need to be informed by good information on the potential of the resource, the nature of existing fisheries, and the social, environmental and economic issues that shape resource use. Unfortunately, there is almost no information on current harvest rates or the value of various fisheries, and very little on indigenous knowledge and traditional governance arrangements with respect to fish. The data that are available are often not collated, or, if collated, are in grey literature that is not easily accessible, and, because inland fisheries has never been defined as an economic sector in policy, there are several constraints to the usefulness of much of the existing data. Firstly, inland fisheries research has never been well funded in South Africa and most studies that were undertaken on the fisheries potential of impoundments date back to the 1980s, which marked the period just after some of the largest impoundments were constructed, stimulating a brief interest in developing inland fisheries (Cadieux, 1980a; Hamman, 1980; Cochrane, 1983; Jackson et al., 1987). In addition, the freshwater fish research focus has changed over the years from suitability assessments for stocking non-native fishes, through dam building and fisheries development, to a more recent era of biodiversity impact studies. As a result of the paucity of recent literature on inland fisheries, the holistic descriptions of existing fisheries in this report which contextualise the literature presented are to a large extent based on the authors' knowledge of the field.
This literature review, undertaken as part of a larger Water Research Commission (WRC) solicited 'baseline and scoping study on the development and sustainable use of storage dams for inland fisheries and their contribution to rural livelihoods' (WRC Project No. K5/1957//4, WRC, 2011), is the first comprehensive synthesis of existing peer-reviewed and grey literature on inland fisheries in South Africa, and is an important step towards contextualising the resource, as it:
- summarises the state of knowledge on South African inland fisheries;
- identifies potential data sources;
- identifies important knowledge and
- highlights knowledge gaps.
Categorisation of inland fisheries literature
In the planning process for South African impoundments, the recreational or commercial benefits from associated fisheries development were never considered. As a result, secondary uses of these impoundments for recreational and economic gain are incidental, primarily due to the lack of the incorporation of their potential social and economic importance in the planning process (Du Plessis and Le Roux, 1965). Nonetheless, in subsequent years, a number of studies have been undertaken on a variety of topics related to inland fisheries,including: fish production in different water bodies; rural fisheries development potential; recreational fisheries; traditional fisheries; and valuation studies. A comprehensive literature search using various databases, as well as 'grey data' available from fisheries projects, revealed 173 publications dealing directly with inland fisheries. The nature of these publications is summarised in Figs. 1, 2 and 3, and in Table 1.
Chronological overview of inland fisheries literature
In this section we categorise the inland fishery literature themes chronologically and track the changing research interests, which tended to mirror societal priorities of the time (Table 2).
Colonial-era fish introductions for recreational fisheries
Inland fisheries development began with the importation and spread of non-native fishes in South Africa during the 19th century colonial period. The details of the fish introductions are described in De Moor and Bruton (1988) and, more recently, Van Rensburg et al. (2011). Early introductions of alien fishes primarily focused on providing opportunities for recreational angling.
The common carp, Cyprinus carpio, was the first of the popular alien recreational angling species to be introduced into South Africa (De Moor and Bruton, 1988). It was initially introduced in the 1700s by British colonists for ornamental purposes, and for its believed potential to provide food from South Africa's apparently 'barren' rivers (Anon., 1959; Bruton and Merron, 1985; Bruton and Van As, 1986; De Moor and Bruton, 1988; Skelton, 2001; Van Rensburg et al., 2011). Reports produced by the Inland Fisheries Department, under the Cape Provincial Administration, document that the first official introduction took place in 1896 when C. carpio were imported from England to the Jonkershoek hatchery in the Cape and, in the same year, to the Pirie hatchery in King Williams Town, from Scotland (Anon., 1944; Anon., 1950b). However, De Moor and Bruton (1988) noted that numerous other introductions of C. carpio probably occurred during the 19th century. Examples of such 'unofficial' introductions include an article published in The Cape Argus in 1859, which documents the introduction of 6 C. carpio into the Botanical Gardens reservoir in Cape Town by Mr C A Fairbridge, a member of the Cape Legislative Assembly (Anon., 1959b). In addition, an article in The South African Advertiser and Mail refers to the introduction of 3 C. carpio from England by a Mr Ekstein into the pond on his estate (Harrison, 1966b). Following their official introduction to the Cape, C. carpio were distributed to farm dams across South Africa from 1900 (Anon., 1944). After the realisation of their impacts on natural ecosystems, including the introduction of parasites, as well as their ability to drastically alter habitats, stocking activities were ceased and legislation was created in the 1920s in order to halt the further spread of C. carpio (Harrison, 1959; De Moor and Bruton, 1988).
The successful introduction of non-native salmonids into South Africa occurred in the latter part of the 19th century. The brown trout, Salmo trutta, a European species, was imported to the Boschfontein Hatchery in Natal in 1890 (Pike, 1980a), and rainbow trout, Oncorhynchus mykiss native to the Pacific coast of North America, were introduced to the Jonkershoek Hatchery in the Cape in 1897 (Manning, 1908; Anon., 1944; Skelton, 2001). Their introduction was a consequence of British colonists' dissatisfaction with the lack of 'suitable' indigenous angling fishes, and the realisation that many of the streams draining mountainous areas in the Cape and Natal would provide suitable trout habitat (Skelton, 2001). Following several importations from European countries, the first hatcheries to successfully produce trout were established at Jonkershoek near Stellenbosch (Anon., 1944), and Pirie near King Williams Town in the Cape Province, in the late 1890s (Harrison, 1954c). Just over 30 years later several other hatcheries had been installed in different parts of South Africa, including Tetworth and Lydenburg hatcheries in Natal and Transvaal, respectively (du Plessis, 1961; Pike, 1980a).
A large proportion of literature on trout fisheries from the colonial period is contained within the Piscator, the journal of the Cape Piscatorial Society (established in 1931), which was first published in 1947. Articles within the journal, as well as other popular publications, include accounts of the first introductions of trout into the country as well as attempts to acclimate and introduce them into various parts of the country (Day, 1932b; Harrison, 1940a; Harrison, 1948b; Anon., 1950a; Harrison, 1951; Harrison, 1953c; Anon., 1961/62; Donnelly, 1965; Harrison, 1972; 1973; Harrison, 1975).
Four centrarchid species, fishes native to North America, were introduced into the country for angling purposes: the largemouth bass, Micropterus salmoides; the smallmouth bass, Micropterus dolomieu; the spotted bass, Micropterus punctula-tus and the Florida bass, Micropterus floridanus (De Moor and Bruton, 1988; Skelton and Weyl, 2011). Micropterus salmoides was first introduced in 1928 at the Jonkershoek hatchery in the Cape (Anon., 1944), and was followed by M. dolomieu in 1937 (Anon., 1944; Harrison, 1953a; d; e). These 2 species were introduced into various localities in the province and in 1952 they were stocked in the newly-established Umgeni hatchery in Natal, which undertook their stocking in that province thereafter (Pike, 1980). Micropterus punctulatus was introduced in 1939 into various localities in Natal and the Cape Province (Harrison, 1965/65a), but failed to establish successfully, and its distribution is now limited to only a few localities (Crass, 1964; Smith, 1984; De Moor and Bruton, 1988; Skelton, 2001). In 1980, M. floridanus was introduced to the Umgeni hatchery in Natal for experimental purposes (De Moor and Bruton, 1988) and is now present throughout the province (Skelton, 2001). Both M. salmoides and M. dolomieu were introduced widely around the country through the efforts of both anglers and conservation authorities and, as with trout, a large amount of literature on these introductions is available in the Piscator journal as well as other popular publications (Harrison, 1936; 1948b; 1951; Anon., 1952a; Harrison, 1952d; 1952e; 1953a; 1953b; 1954b; Harrison, 1962; 1963a; 1964; 1965a; 1966a; 1967; 1968; Coetzee, 1977; McVeigh, 1979a; Anon., 1980; Anon., 1981; Joubert, 1984; De Moor and Bruton, 1988). Unlike trout fisheries in South Africa - especially those located on reservoirs - which generally require continual stocking as populations cannot reproduce due to adverse ecological conditions, bass fisheries have thrived as a result of these fishes having far wider ecological tolerance limits and the concomitant ability to reproduce in a variety of habitats (Skelton, 2001; Cooke and Philipp, 2009). These predatory fishes prompted many subsequent introductions of non-native fishes as fodder fish and for additional sport angling (De Moor and Bruton, 1988; Skelton, 2001; Van Rensburg et al., 2011).
Early research (pre-1940) therefore concentrated on surveying South African impoundments in order to assess their suitability for stocking a variety of non-native fishes. The earliest report on such suitability is Hey (1926a; 1926b), while subsequent introductions of non-native fishes are comprehensively reviewed by De Moor and Bruton (1988). This focus on suitability of water for sport fishes, and the subsequent importation of a variety of fishes for recreational angling, dominated fisheries development and national stocking programmes until the mid-20th century (Van Rensburg et al., 2011). As a result, inland fisheries were primarily developed for recreational angling (Hey, 1926a; 1926b; McVeigh, 1978; Andrew et al., 2000; Weyl et al., 2007).
Interest in fish as food: 1960s onwards
An increasing realisation that fisheries could be utilised for commercial purposes, rural development and food security began in the 1960s, and this focus has continued to the present. Several studies investigated the fisheries potential of dams for the establishment of capture fisheries (Jackson, 1973; 1974; 1976; Bruwer and Claasen, 1978; Whitehead, 1978; Koch and Schoonbee, 1980; Hamman, 1981; Jackson, 1981; Bruwer, 1982; Eccles et al., 1983; Allanson and Jackson, 1983; Tómasson, 1983; Tómasson et al., 1983; Tómasson et al., 1985; Cochrane, 1987; Van Senus, 1992; Schramm, 1993; Marshall and Maes, 1994; De Villiers, 1998; 2003; Rouhani and Andrew, 1998; Andrew, 2001; Rouhani, 2001; 2003; 2004; Burton et al., 2002; Potts, 2003; Rouhani and Davies, 2003; Potts et al., 2004; Ellender et al., 2009; Richardson et al., 2009; Weyl et al., 2010a). Research was focused largely on estimating production potential and on the biology of potential fisheries species (De Villiers, 1998; 2003). The role of inland fisheries in potentially providing food received attention as part of South Africa's apartheid homeland development policies of the late 1970s and 1980s (Van den Berg et al., 1975; Roode, 1978; Van der Waal, 1978a; b; 2000; Mabitsela, 1981; Saayman et al., 1983; Schoonbee et al., 1995), as well as from development practitioners (De Satge, 1978; Duncan-Brown, 1980; Taylor and Van der Walt, 1985; Seti, 2002; Allison, 2005). In addition, wider human-ecosystem interaction and livelihood studies have highlighted the role of fisheries in traditional livelihoods. A number of authors have described the floodplain fisheries of the Tshonga people in Maputaland, and analysed the resource governance issues associated with the building of the Pongolapoort Dam, which disrupted the annual flood and associated fishing activities (Tinley, 1964; Coke and Pott, 1971; Jubb, 1973; Heeg and Breen, 1982; LaHausse and DeLalouviere, 1987; Merron et al., 1993; Merron and Weldrick, 1995; Jaganyi et al., 2008). Van der Waal (2000) and Dederen et al. (2001) undertook a socio-biological study of the aquatic resources and their utilisation in an underdeveloped rural region, the Mutshindudi River catchment in Limpopo Province.
From the late 1990s to the present, literature has increasingly focused on using inland fisheries as vehicles for food security and rural development (Andrew et al., 2000; Van der Waal, 2000; Andrew, 2001), and more recently is moving towards assessing the need for policy (Weyl et al., 2007) and qualifying and quantifying resource use (Van der Waal, 2000; Ellender et al., 2009; 2010a; b). It must, however, be noted that, apart from these very preliminary analyses and site specific descriptions on resource use, there is no recent literature available which contextualises inland fisheries with respect to rural development, livelihoods and policy development in South Africa.
Growing concerns about the impacts of non-native fish species on freshwater ecosystems began to surface in the 1960s and 1970s (Gabie, 1965; Gaigher, 1973; Hey, 1977), and in the 1980s the provincial nature conservation departments ceased breeding and stocking fish into impoundments and streams for recreational angling purposes (Skelton and Davies, 1986; Rouhani and Britz, 2004). A number of studies have documented the impacts of non-native fish introductions, which include predation on native biota, competition for food and space, hybridisation and introduction of parasites and disease (Bruton and Merron, 1985; Bruton and Van As, 1986; Ashton et al., 1986; De Moor and Bruton, 1988; Impson et al., 2007; Lowe et al., 2008; Swartz, 2009; Weyl et al., 2010c; Ellender et al., 2011; Olds et al., 2011; Stadtlander et al., 2011; Van Rensburg et al., 2011; Wassermann et al., 2011a; 2011b). As a result of such impacts, removals of non-native fishes from some invaded areas have been planned in the Western Cape (Enviro-Fish Africa (Pty) Ltd., 2009). The National Environmental Management: Biodiversity Act (NEM:BA) of 2007 has provided a framework for managing the impacts and beneficial uses of non-native fish species. The primary management tool is the development of a zoning approach whereby permitted uses of non-native species are specified (Swartz, 2009). This legislation will also facilitate and legitimise the formal management of non-native fishes for fisheries.
Current status: South Africa's inland fisheries are data poor
Overall, there has been little research into inland fisheries-related topics, and the research that is available is often outdated and no longer relevant. Of particular concern is the paucity of recent quantitative data on fishery yields, participation and catch rates, as described in papers by Van der Waal (2000) and Ellender et al. (2009; 2010a; b).
Literature on legislation governing inland water resources
As the research focus and published literature has shifted from the introduction and propagation of non-native fishes, to fisheries development, and more recently the impacts of non-native fishes in South Africa, so too has the legislation regarding the utilisation of inland waters and their resources. Hey (1977) described the history and evolution of nature conservation and associated legislation in South Africa noting that, after the promulgation of the Union of South Africa Act of 1909, which devolved responsibilities for the preservation of fish to the provinces, regulation of fishing activities was largely an administrative function enforced by the South African Police. In the case of the Cape Province, the importation of non-native species for the purposes of angling was encouraged and permitted in legislature in Act No. 10 of 1867 (Davies, 1986; Ness, 1991), and subsequently provincial governments largely provided financial support for the development and protection of non-native species fisheries (Anon., 1936; Day, 1936; Harrison, 1949; 1957). The formation of the Inland Fisheries Division (which was later expanded to become the Cape Nature Conservation Department) in the Cape Province in 1942 preceded the first piece of legislation, the Inland Fisheries Ordinance, No. 12 of 1947, which enacted measures pertaining specifically to the protection of aquatic fauna in inland waters, most notably from water pollution (Hey, 1977). As outlined in Harrison (1949), this protection was in the form of proclaimed areas for non-native trout, black bass, perch Perca fluviatilis, and bluegill Lepomis macrochirus, which could only be fished for with an inland fishing licence; no measures enforced the protection of carp, the sale and transportation of which was illegal. This ordinance expanded into the Nature Conservation Ordinance, No. 19 of 1974, which prohibited the transport of non-native fish species while still allowing for the protection of species such as trout through closed seasons, bag and size limits, and tackle restrictions (Hamman, 1986). The ordinance also allowed for the use of nets subject to the possession of a licence issued by the Director of Nature and Environmental Conservation. In Natal, the establishment of the Freshwater Fish Protection Ordinance, No. 9 of 1955 and legislation thereof is discussed in Anon. (1968), with specific reference made to proclaimed trout and non-trout areas, fishing seasons and licence requirements. This was followed by the declaration of the Natal Nature Conservation Ordinance, No. 15 of 1974, which made no distinction between native and non-native fishes and rendered the use of nets, other than those used for landing fish, illegal. In the Orange Free State, inland fisheries legislation was first outlined in the Nature Conservation Ordinance, No. 8 of 1969, and stipulated regulations including the enforcement of closed seasons, requirement of a licence for angling or netting, permitted fishing areas, and the importation of live fish. Anon. (1970) describes fisheries management and legislation in the Transvaal: the Nature Conservation Division at this time was responsible for implementing fishing licence regulations and using these and other funding sources acquired to develop inland waters for public recreational angling through stocking programmes of native and non-native fishes. The proclamation of the Transvaal Nature Conservation Ordinance, No. 12 of 1983, amalgamated legislation regarding fisheries similar to that implemented in the Orange Free State.
Skelton and Davies (1986) documented the changing attitude of conservation authorities regarding legislation that protected non-native fishes; more specifically, the proposed removal of protective rights assigned to non-native angling species such as trout and bass by the Cape Department of Nature and Environmental Conservation. Hamman (1986) referred to the need for a change in legislation that afforded protection to native species while no longer actively propagating non-native species at state hatcheries for distribution into inland waters. Walmsley and Pike (1989) outlined the legislation surrounding non-native fishes and stressed the need for a revision of policy; this was accompanied by a document describing future guidelines for the promulgation of legislation, which regulated non-native species importations (Anon., 1989). These changes led to cessation of non-native fish production and stocking by the provincial governments and the subsequent closure, 'mothballing' or leasing of most provincial hatcheries, the consequences of which are documented in Rouhani and Britz (2004).
The proclamation of the National Water Act (NWA, 1998) and the National Environmental Management Act (NEMA, 1998) in post-apartheid South Africa, and the resultant governance measures introduced regarding inland fisheries, are discussed in Weyl et al. (2007). The authors note that access rights to all water are administered by the Department of Water Affairs (DWAF) while resources, such as fish, are controlled by provincial governments as stipulated in the NEMA, which promotes sustainability, biodiversity, and equitable allocation of resources. Provincial governments reserve the right to administer licences for recreational, subsistence and commercial fishing; however, the paper illustrates the lack of cohesion between government departments and the fact that there is no national lead agent enforcing an overall policy regarding access rights to particular dams and their resources.
NEM:BA was gazetted in 2004 within the fabric outlined in the NEMA. The regulations pertaining to non-native fishes within the NEM:BA, and the contentions of recreational anglers regarding these regulations, have led to official 'position papers' published by various angling bodies such as the Federation of South African Flyfishers (Bainbridge et al., 2005) and the Trout Action Group (TAG), in coordination with the Eastern Cape Flyfishers Club (Fick, 2009). These publications largely object to the NEM:BA. Conversely Roux et al. (2006), in a report that summarises requirements for the conservation of inland water biodiversity, describe the NEM:BA (2004) as well as the NWA (1998) as the 2 most important pieces of legislation concerned with the implementation of conservation measures in South African inland waters.
McCafferty et al. (2010) describe the structural change in inland fisheries governance. Where previously there was no national lead agent in inland fisheries, the mandate for this function came under the auspices of the Department of Agriculture in May 2009, which subsequently became the Department of Agriculture, Forestry and Fisheries (DAFF). The policies of the DAFF, which include food security, economic empowerment and poverty alleviation, now apply to the development of South Africa's inland fisheries resources, the implication being increased impetus to develop fisheries to achieve the above policies within the DAFF mandate.
Literature on South Africa's inland fisheries by sector
Generally, the development and typical life cycle of an inland fishery begins with an initial emphasis on food production through subsistence utilisation, followed by growing commercial interests (Smith, 1986). As economies develop, subsistence and commercial fisheries give way to recreational fisheries which maximise economic gain through associated industries (Smith, 1986). South African inland fisheries are somewhat anomalous as they have not generally followed this typical evolution, with recreational uses being developed first and subsistence and commercial resource use being recent developments (Andrew et al., 2000; Weyl et al., 2007; Ellender et al., 2009). This can be attributed to several factors including the relatively recent construction of inland impoundments, the associated lack of a fishing tradition in rural communities, apartheid era policies which excluded access to many dams by local communities, as well as the lack of supporting developmental policies.
'Recreational anglers...utilise the resource primarily for leisure purposes but may sell some of their catch... They generally have permanent employment, use high technology gear consisting of a fibreglass or graphite rod, and a multiplying or spinning reel, and release, consume or sell a portion of their catch.' (Ellender et al., 2009, Table 2, p. 679).
It is estimated that more than 1.5 million people are involved in recreational angling in South Africa (Leibold and Van Zyl, 2008). For the past century, recreational angling has been the dominant activity on South African impoundments (Hey, 1926a; b; Anon., 1970; Anon., 1971; McVeigh, 1978; Andrew et al., 2000; Weyl et al., 2007). It is therefore surprising that this sector remains largely un-quantified and that the only attempts at quantifying recreational angling have been in the Transvaal in the 1960s (LeRoux, 1965) and 1970s (Cadieux, 1980a,b). Besides these studies, only 3 other studies have been undertaken: by Van der Waal (2000) who looked at fishery resources in the Mutshindudi River catchment in Limpopo province; and by Ellender et al. (2009) and Ellender et al. (2010a; b) which described user group dynamics and quantified the harvests from Lake Gariep, South Africa's largest impoundment.
Recreational angling in South Africa remains the major use of inland fisheries; however, since the mid-1990s there appears to have been an increase in the utilisation of inland fisheries by people whose main motivation for using the resource is subsistence (Van der Waal, 2000; Weyl et al., 2007; Ellender et al., 2009).
Subsistence users... 'live within 15 km of the lake, use basic transport methods to access the lake (walk, bicycle, and a lift in a vehicle), predominantly use artisanal type gear (e.g. hand-lines), and are reliant on the resource for food and as a primary or supplementary source of income' (Ellender et al., 2009, Table 2, p. 679).
The emergence of subsistence fisheries on many South African impoundments is a fairly new phenomenon associated with the post-apartheid era. Despite historical development efforts in traditional areas, which included the 1973 appointment of a dedicated fisheries officer with a mandate to encourage harvesting of inland lakes and impoundments, subsistence fisheries failed to develop (Batchelor, 1989). This was attributed largely to the lack of clear policies and associated administrative procedures facilitating the permitting of harvesting (Batchelor, 1989). This situation persists today and Weyl et al. (2007) attributed the low participation in subsistence fisheries to a lack of angling tradition, and the absence of an institutional framework to facilitate managed and sustainable access to the fish resource in many inland waters. Although subsistence fishing has not yet been provided for in the legal reforms of the post-apartheid constitutional democracy, water management authorities now tend to tolerate informal fishing activities by local communities, and in some instances have attempted to promote fishing projects. As a result subsistence use of impoundments is increasing (Weyl et al., 2007; Ellender et al., 2010a; b).
In a case study conducted to assess the fisheries resources in the North West Province, Weyl et al. (2007) reported that, of the 10 dams surveyed, 6 had some sort of subsistence angling activity. On Lake Gariep, subsistence angling dominated the fishery, accounting for 61% of fishing effort (Ellender et al., 2009). Ellender et al. (2010a) also showed that there were some 450 regular subsistence anglers making use of the resource from adjacent settlements (Ellender et al., 2010b). There are few other descriptions of subsistence angling on impoundments and available reports focus on the Eastern Cape Province (Andrew et al., 2000, Rouhani, 2003). In the Ntenetyana Dam, Alfred Nzo District Municipality, Eastern Cape, approximately 20-30 fishers from various communities living around the dam were recorded to be angling in the dam using hand lines (Rouhani, 2003). Therefore, although largely undocumented, subsistence use of inland fisheries is likely to be much more widespread than is indicated by the available publications. Recent anecdotal evidence indicates that the subsistence sector is becoming an increasingly important sector in rural livelihoods. Subsistence fishing therefore needs consideration in the long-term planning process for inland fisheries.
'A commercial fishery is operated by a private individual who is granted access at provincial level to harvest a pre-determined yield from a dam. The enterprise is profit- oriented, striving to minimise production costs and to maximise efficiency in production' (Weyl et al., 2007, p. 3).
Commercial inland fisheries are underdeveloped as a result of a history of limited access to resources, low demand for freshwater fish, the lack of an inland fisheries policy and unclear fisheries management objectives (Weyl et al., 2007). Commercial fishing in the form of single licences is only permitted on a limited scale on a few dams (e.g. Gariep, Bloemhof and Molatedi Dams) (Weyl et al., 2007). Although commercial fisheries remain largely undocumented, historically commercial fisheries operated on a few impoundments including the Kalkfontein Dam, Bloemhof Dam (Orange/Vaal River system) and Darlington Dam (Sundays River system) (Merron and Tómasson, 1984; Potts, 2003). Despite these attempts to develop commercial fisheries on larger impoundments in South Africa the commercial viability of these enterprises has been marginal.
There have been numerous attempts to develop formal small-scale commercial fisheries in rural communities (e.g. Jackson, 1980; Schramm, 1993; Andrew, 2001). The more recent attempts are summarised in Table 3. Unfortunately, few fisheries developed or remained operational after the initial project interventions. The reasons for this lack of success are unclear but have been attributed to: the perceived low value of the resource; lack of a clear guiding policy; little historic involvement in fishing; the limitation of artisanal and subsistence fishing to the former homeland areas under the apartheid era; a cultural resistance to fishing (Andrew, 2001); and the concerns of management authorities that the support of subsistence and commercial use may threaten fish populations (Andrew et al., 2000).
The overriding reason for the lack of development of commercial inland fisheries is probably economic. Recent estimations on the profitability of various commercial fisheries options on Lake Gariep (Potts et al., 2004) and Darlington Dam (Weyl et al., 2010a) found that the low fish price (ZAR 6-10/ kg), coupled with the absence of a formal marketing system for inland fish, precluded the economic viability of even small commercial enterprises in these water bodies. In addition, they showed that employment possibilities in commercial fisheries were relatively low, and pointed out that commercial fisheries would most likely result in considerable conflict with other users of the resource. As a result, employment gains from commercial fisheries were likely to be countered by employment losses from tourism at sites where recreational fisheries were well established.
Commercial fisheries assessments and recent developments are summarised in Table 3. Despite such assessments, the only marginally successful, non-subsidised commercial fishery still in operation is located at Bloemhof Dam in the Free State. While catch data from these fisheries are returned to local nature conservation offices and are compiled in internal reports, they are not published in an openly-accessible form. As a result the literature on commercial-level enterprise and catch rate is extremely sparse and comprised of non-standardised or even anecdotal data. Whitehead (1978), for example, reports catches of 1 ton per day for 100 days from Darlington Dam; Batchelor (1989) reported that commercial operators in the Free State harvested 469 tons from various dams in 1984; and Andrew et al. (2001) report catches of 3.6 tons in 120 days for Tyefu Dam in the Eastern Cape. Such data lack the information on fishing effort required for any further analyses.
Perhaps most exemplary of the lack of information are the data available for Lake Gariep, South Africa's largest inland water body. The fisheries potential of this dam was recognised as early as 1972, and Hamman (1981) developed a detailed management plan for the fishery. Despite this, commercial fishery development remained dormant until 1992, when a small-scale commercial operation was initiated near the dam wall. This operation failed after some years, but Potts et al. (2004), reported 2 commercial operators on the dam in 2002. To date, the only reported data for any of these formal ventures is a short mention of commercial catches in Potts et al. (2004) which states that 'a total of 4 160 fish with a combined mass of 10 292 kg were captured between January 2000 to January 2001 in the gillnet and seine net fishery. The dominant species in terms of number and mass was the common carp and sharp-tooth catfish, while the other species were caught in very small numbers' (p. 22).
Fisheries assessments depend on the availability of commercial and recreational catch data and compilations of available raw data are an urgent national requirement that are necessary not only for assessments of yield, but also for decision making and economic feasibility analyses.
Managed sport fisheries
An important, but largely undocumented, element of inland fisheries is the commercial management of private dams and public waters for sport fishing, particularly trout fishing, which forms the basis of a substantial tourism-based local economy in suitable areas of Mpumalanga, KwaZulu-Natal and the Eastern Cape (Hecht and Britz, 1990; Du Preez and Lee, 2010).
The trout fishery and associated economy of Rhodes Village in the Eastern Cape was surveyed by Du Preez and Lee (2010), highlighting the value of recreational fishing as a means of stimulating tourism-based local economic development (LED). A unique inland fishery management system for the local self-sustaining trout population has been created, whereby recreational trout fishing in the rivers and streams in and around Rhodes Village is managed on behalf of riparian landowners by private individuals, the Mosheshs's Ford Angling Club and the Wild Trout Association (WTA). The waters include the upper Kraai, Bell, Kloppershoekspruit, Vlooikraalspruit, Bokspruit, Sterkspruit and Riflespruit. Recreational anglers pay a fee to fish and may also employ the services of a professional angling guide if desired (Du Preez and Lee, 2010).
Literature on the suitability of inland waters for fisheries development
Fishery productivity yields of South African dams
South Africa is a water-scarce country and, apart from historic traditional fisheries on the Pongola Floodplain in northern Kwazulu-Natal (Heeg and Breen, 1982) and the Orange River in the Northern Cape (Merron and Weldrick, 1995), opportunities were not widely available for fisheries to develop until the dam-building era of the 20th century (Andrew et al., 2000). The primary function of these impoundments was to supplement urban and agricultural water supplies, as well as for hydro-electricity. As a result, approximately 3 150 impoundments with a surface area >1.2 ha have been constructed countrywide (DWAF, 1997) (Fig. 4). During the period from 1800 to 1940, impoundment numbers increased steadily to approximately 400, and since then that figure has increased by more than 6 times (Fig. 5). These impoundments have created significant inland water resources amounting to a surface area of more than 3 000 km2.
Unfortunately, there are almost no studies on annual harvest rates from inland water bodies in South Africa. Annual catch rates have only been determined for recreational fisheries in Hartebeespoort Dam (Cochrane, 1987), Lake Gariep (Ellender et al., 2010a), and Darlington Dam (Weyl et al., 2010a). In each of these dams estimates are based on 1-year assessments because of the lack of dedicated monitoring surveys (Table 4). An estimate of total inland fisheries production in South Africa of 2 300 t-yr1 is provided in FAO reports on inland fisheries in southern Africa (Van den Bossche and Bernacsek, 1990; Marshall and Maes, 1994).
It is not known how this estimate was derived, but it most likely includes the 695 t-yr1 estimated from recreational fishers in Hartebeespoort Dam in the 1980s (Cochrane, 1987) and some of the yields reported by Batchelor (1989).
As a result of this lack of prior fisheries data, direct estimates of fish production cannot be determined, and all assessments of potential fish yield for South Africa are derived from applying empirical relationships to morphological and chemical data. Such relationships, like the Schlesinger and Regier (1982) global temperature-adapted morpho-edaphic index (MEI) model, only give rough indications of potential fish yield. These are summarised in Table 5. A conservative estimate of average fish production of 40 kg-ha-1, based on documented studies, indicates that the potential fish production from these water bodies could potentially yield 1 000 to 2 000 t-yr1. Allocations between recreational, subsistence and commercial fisheries are likely to be problematic, as there is limited published information available to decision makers regarding the value of extant fisheries and the multiple user groups that may access water resources, leading to uncertainty regarding potential conflict areas between these sectors (McCafferty et al., 2010).
Potential fishery production from small water bodies
Fisheries in the southern African region, an area encompassing those countries belonging to the Southern African Development Community (SADC), are primarily located on major lakes (e.g. Lakes Tanganyika and Malawi) or in large man-made dams (e.g. Kariba) (Marshall and Maes, 1994; Weyl et al., 2010b). In many cases, the potential for further development of these fisheries is limited and some are already considered to be maximally- or overexploited (Marshall and Maes, 1994; Weyl et al., 2010b). This is not the case for smaller reservoirs constructed for water supply purposes, which have significant fisheries potential but which are largely undeveloped (Marshall and Maes, 1994).
Unlike other countries in the SADC, which have significant amounts of fisheries data, South Africa did not join the SADC until 1994 and therefore data on small water bodies presented in the Marshall and Maes (1994) review for this country are not comprehensive. That which is presented highlights South Africa's limited natural lake area, large number of reservoirs, and fish yield, which, in contrast to other SADC countries, is largely accounted for by recreational anglers. While data deficient, the report does provide an estimate of total fish production in South Africa of 2 300 t-yr1, as mentioned earlier, and a map illustrating all of the South African impoundments is also included in the report. Importantly, the review also makes mention of the potential that stock enhancement may have in improving the productivity of small reservoirs in the region and highlights the introduction of non-native species in South Africa as an example.
Attempted interventions to establish fisheries
Attempts to establish capture fisheries in inland waters date back to the 1970s. Few have been successful and, while there is some literature on the establishment of some fisheries (see Table 3), no studies exist that evaluate the success rate or the current number of functioning enterprises. Some of the better-documented case studies are summarised below.
Stock enhancement using mullet in the Eastern Cape
In the late 1970s and early 1980s a number of Eastern Cape impoundments were stocked with 2 species of mullet: Myxus capensis; and Mugil cephalus (Bok, 1983). The fingerlings were wild caught in Eastern Cape estuaries and subsequently stocked into impoundments to provide opportunities for the development of gillnet fisheries. The stocking was aimed at enhancing the fisheries potential of impoundments with mullets, which were commercially more viable than the resident moggel Labeo umbratus and C. carpio (Bok, 1983). While growth rates and catches were favourable, with yields of up to 500 kg-ha-1, the unpredictable recruitment of wild-caught fry proved to be a significant bottleneck and constraint to future development of this fishery (Bok, 1983).
Fisheries development in rural areas
During the 1970s and 1980s there was a movement toward promoting the use of freshwater fish in impoundments, through stocking and training programmes in the former homeland areas, and fisheries sections were active in the authorities of Transkei, Ciskei, KwaZulu, Qwaqwa, Venda, Lebowa, Gazankulu and Bophuthatswana (Van den Berg et al., 1975; Roode, 1978; Van der Waal, 1978a; b; 2000; Mabitsela, 1981; Saayman et al., 1983; Schoonbee et al., 1995; Andrew et al., 2000). A fishery for wild fish stocks was promoted for a short period in 1979/80 on Xonxa Dam in the Glen Grey District (Duncan-Brown, 1980). These homeland authorities promoted commercial angling from dams, and ran hatcheries to produce fingerlings for stocking purposes (Andrew et al., 2000; Rouhani and Britz, 2004). There is little evidence suggesting that these efforts resulted in significant benefits for the communities involved (Andrew et al., 2000).
In post-apartheid South Africa, inland fishery projects have been undertaken in a few locations. In the Eastern Cape Province, a community-driven fisheries project was undertaken on the Great Fish River, as well as in 2 small impoundments. The fishery in the Fish River Valley was shown to contribute to food security and income generation for the communities living in that area (Andrew et al., 2000). The Rural Fisheries Programme (RFP) of the Department of Ichthyology and Fisheries Science of Rhodes University was commissioned by the Alfred Nzo District Municipality to survey Ntenetyana Dam, to determine its fisheries potential. There was an existent subsistence fishery, and management recommendations indicated that fishery activities could be expanded such that a community-based, small-scale fishery was developed incorporating hook-and-line and seine-netting subsistence practices, as well as a recreational fishery component (Rouhani, 2003). The current status of these fisheries has, however, never been evaluated.
Lake Gariep was constructed in 1972 and periodic attempts have been made to harvest fish commercially since 1992 (Potts et al., 2004). In 2004, the Free State Department of Economic Affairs, Environment and Tourism (DEAET) provided support to the Venterstad Community Fisheries Project (VCFP), which aimed to provide poverty relief to historically-disadvantaged communities in Venterstad and Oviston, through facilitating their access to the fishery in specific areas of the lake. An experimental fishing permit was issued by DEAET to allow for the harvesting of an initial quota of 50 t-yr1 of C. carpio, sharp-tooth catfish Clarias gariepinus and mudfish Labeo capensis. The permit was granted specifically for hook-and-line angling (Potts et al., 2004). The project shut down after a short running period due to bad planning and management, and a lack of consultation and local knowledge (Potts et al., 2004). Currently the fish resource is used only by subsistence and recreational anglers (Ellender et al., 2009).
The commercial fishery development attempts in Darlington Dam, Eastern Cape, are summarised by Weyl et al. (2010). In 1978, a fishery operation was initiated in Darlington Dam which comprised a team of 5 fishermen equipped with gillnets and a small boat. The operation provided gutted L. umbratus and C. carpio to markets in both Grahamstown and Uitenhage. Catch rates were high and it was reported that 1 t-d-1 could be harvested. While the operation was profitable,the operation ceased after a year due to the withdrawal of the manager. Subsequently, attempts were made to develop various gillnet fisheries based on these species. In the 1980s, a gillnet fishery that salted and dried fish was set up under the management of Mr Tiko Hirsch. During this time the dam was also stocked with mullet to supplement the fishery. Due to economic reasons this commercial operator moved to the Free State to begin operations on Bloemhof Dam. No further attempts have been made to develop a commercial fishery on the dam. There was, however, some reported conflict between this fishery and recreational angling, pertaining to competition for the resource and pollution resulting from fish processing on the lakeshore (Weyl et al., 2010a).
Biological survey information with fisheries management recommendations
There is a paucity of available literature investigating the biological sustainability of harvesting fish populations in South African impoundments. Surveys on the biology and management of fish populations are limited to 3 Transkei reservoirs, Xonxa, Lubisi and Umtata (Schramm, 1993; Richardson et al., 2009); 2 impoundments on the Orange River system in the Free State, Lake Gariep and Lake Van der Kloof (Hamman, 1981; Allanson and Jackson, 1983; Tómasson, 1983; Tómasson et al., 1985; Potts et al., 2004; Ellender et al., 2009; 2010a; b); 5 small impoundments in the Eastern Cape (Potts, 2003; Potts et al., 2006); Hartbeespoort Dam on the Crocodile- and Magalies River systems in the North West Province (Koekemoer and Steyn, 2005); Darlington Dam on the Sundays River system in the Eastern Cape (Weyl et al., 2010a); and the growth and survival of 2 mullet species (M. capensis, M. cephalus) stocked as wild-caught juvenile fish into impoundments in the Eastern Cape (Bok, 1983).
On Lake Gariep, post-impoundment surveys were conducted over an 8-year period on fish population dynamics and production potential of largemouth yellowfish Labeobarbus kimberleyensis, smallmouth yellowfish Labeobarbus aeneus, L. capensis, L. umbratus, C. gariepinus and C. carpio, in order to develop a fisheries management plan (Hamman, 1981). The study concluded that a commercial gillnet fishery could be implemented and an annual catch of 886 tons (multi-species) could be harvested. Cyprinus carpio was considered as the species with the largest harvest potential.
In the period between 1978 and 1983, concurrent studies were undertaken on the limnology and fisheries potential of Lake Van der Kloof (previously Lake Le Roux) (Allanson and Jackson, 1983; Tómasson, 1983; Tómasson et.al., 1983; Tómasson, 1985). It was concluded that the physical characteristics of the lake inhibited the harvest potential and that approximately 150-200 tons could be harvested annually. The targeted species would predominantly be L. capensis and L. aeneus, but variable annual recruitment and growth were cited as inhibiting extensive harvest potential (Tómasson, 1983; Tómasson et al., 1983).
Schramm (1993) conducted gillnet surveys to investigate the fisheries potential of 3 Transkei reservoirs (Xonxa, Lubisi, Umtata) and documented the reproductive biology of the fish populations to determine their sustainability. Only Xonxa reservoir displayed favourable catch rates for the establishment of a fishery. The biological characteristics of L. aeneus, upon which the fishery would be based, were also favourable for sustainable exploitation. The fisheries potential of Xonxa reservoir was revisited by Richardson et al. (2009), and the biology of L. aeneus and C. gariepinus were investigated to provide input parameters for stock assessment models upon which fisheries development and management could be based. The study indicated that 2 sustainable fisheries could be developed: a gillnet fishery for L. aeneus (60 mm stretched mesh), which could harvest 23 t-y-1; and a longline fishery for C. gariepinus yielding a maximum of 4 t-y-1 (Richardson et al., 2009).
The life histories and fisheries potential of populations of L. umbratus from 5 small Eastern Cape reservoirs (Katriver, Laing, Sinqemeni, Ndlambe and Dimbaza) were investigated (Potts, 2003; Potts et al., 2006). The research concluded that L. umbratus populations in small, shallow, slightly-enriched reservoirs would be more suitable for exploitation, as these populations were faster growing and were therefore more likely to sustain fishing pressure than populations from more oligo-trophic reservoirs (Potts, 2003; Potts et al., 2006).
Koekemoer and Steyn (2005) conducted a survey of the fish community of Hartbeespoort Dam. Based on the catch composition in experimental gillnets, they concluded that the eutrophic state of the dam favoured a fish community dominated by benthic feeding C. gariepinus and C. carpio. The authors hypothesised that the removal (through harvesting) of 200-300 tons of these 2 species would help restore zooplankton and macrobenthos communities and shift the fish community towards one dominated by Mozambique tilapia Oreochromis mossambicus. Harvesting was to be undertaken by a community fishery project using mainly gillnets. Unfortunately, no subsequently published data are available on harvests or the response of fish communities to harvesting.
A study on the response of L. umbratus, C. carpio and C. gariepinus to current recreational angling, as well as 2 proposed commercial level fisheries (longline and gillnet fishery), was undertaken on Darlington Dam (Weyl et al., 2010a). Stock assessment models indicated that a 100 mm mesh size gillnet fishery was feasible, although initial harvest levels for a gillnet fishery should be conservative and annual harvests should not exceed 60 tons until the full impact on the stock is determined (Weyl et al., 2010a). It was estimated that the current recreational fishery targeting C. gariepinus on Darlington Dam could increase its catch 5-fold before the spawner biomass would be reduced to critical levels. From the biological and experimental fishing (longlines) information obtained for C. gariepinus, a commercial fishery could harvest the species sustainably (Weyl et al., 2010a).
From the aforementioned examples, it is evident that few biological studies have been undertaken to determine the biological sustainability of harvesting fish from South African impoundments. Without information on the biology of species targeted by fisheries, development is severely hampered, as the life-history characteristics of a species directly influence their vulnerability to exploitation, and consequently also the economic feasibility of the fishery.
Value of inland fisheries
South African inland fisheries are largely overlooked as a 'beneficial use' of water in the literature on water resource governance and management. Studies such as Weyl et al. (2007) on fisheries in the North West Province, and the valuations of recreational fisheries by Leibold and Van Zyl (2008), Brand et al. (2009) and Du Preez and Lee (2010), provide an initial insight into the value of the current inland fisheries.
What is evident is that, while commercial fisheries have a long history of failure in South African inland waters, the recreational value of these resources is considerable. A nonpeer reviewed study on the value of recreational fisheries in South Africa, commissioned by the South African Deep Sea Angling Association (SADSAA) in 2007, estimated that the average annual expenditure by anglers affiliated to angling clubs was ZAR7 500 angler1.yr1 and that the economic impact of these anglers, who represent about 10% of participants, was estimated at ZAR900 million-yr1 (Leibold and Van Zyl, 2008). While extrapolations of this value for the unaffiliated anglers cannot be made with any confidence, the report demonstrates the economic contribution that the recreational sector makes to the national economy.
Brand et al. (2009) valued yellowfish-dependent recreational angling on the Vaal River to be in the region of ZAR 133 million per season. Du Preez and Lee's (2010) survey of the economic value of the trout sport fishery to Rhodes Village in the Eastern Cape showed that trout fishing was an important contributor to local tourism, generating ZAR 13.5 million and employing 85 people in a rural village of 600 people, where only 15% of the population were formally employed. Average expenditure was ZAR 5 052 per angler per trip, which averaged 5 days. The study was conducted concurrently to the development of the alien species zoning regulations contained within the NEM:BA, and estimated the potential loss in jobs and revenue to Rhodes Village if trout were to be eradicated from the local rivers and dams. The angler survey revealed that 39 angling-related jobs and ZAR 5.5 million annual income would be lost if trout were to be eradicated from the local rivers.
From a subsistence-use perspective, Ellender et al. (2009; 2010b) showed that at least 59% of the total angling effort in a portion of Gariep Dam was exerted by a minimum of 448 regular subsistence anglers. They cautioned that future development of commercial fisheries could create competition for resources and market with the extant subsistence sector. As a result subsistence users of inland fisheries in South Africa require formal recognition so that their rights to resource use are secured and their livelihoods protected.
The implementation of sustainable development requires that choices regarding environmental resource use, biodiversity conservation and livelihoods need to be informed by evaluations of ecosystem goods and services. These studies exemplify the need for future fisheries development to be guided by sound information that minimises the negative economic impacts of future fisheries development and secures the livelihoods of subsistence users.
While inland fisheries in South Africa undoubtedly contribute to South Africa's economy through the economic impact of recreational fisheries, and provide food security to rural people living in their vicinity, there is a general lack of literature upon which a national inland fisheries strategy can be based.
The available literature is temporally disjunct, site specific and predominantly not peer-reviewed. Apart from a recent paper which describes the fisheries sectors using Lake Gariep (Ellender et al., 2009), there is no recent description of any of the inland fisheries operating in South Africa. Proper descriptions of each sector incorporating data on harvest rates, utilisation patterns and economic contributions are needed urgently.
Unfortunately, inland fisheries are not routinely monitored. Membership in formal recreational angling organisations are reported to be in the region of 150 000 people (Leibold and Van Zyl, 2008). Subsistence- and recreational use by non-affiliated anglers is likely to be even greater. This lack of knowledge obviously constrains the decision-making process, because there are no data against which to gauge the impact of interventions such as the development of a commercial fishery. On Lake Gariep, for example, a commercial fishery employing, at most, 10 people would most likely negatively impact on the livelihoods of 448 subsistence users (Ellender et al., 2010a; b).
Catch rates and harvests are only available for four case studies (Cochrane, 1983; Van der Waal, 2000; Ellender et al., 2010; Weyl et al., 2010a). This is a major bottleneck in assessing the potential of inland fisheries because the de facto open access nature of inland fisheries to recreational and subsistence users (Weyl et al., 2007) may already have led to unsustainable harvest rates and over-fishing in some dams. Globally, for example, there is increasing recognition that the impact of recreational angling (fishing with a rod, line and hook) on fish stocks is as significant as that of many commercial fisheries (Cooke and Cowx, 2004; Arlinghaus and Cooke, 2005). Catch data are therefore urgently required because without such data it is largely impossible to determine whether additional fisheries could or should be developed. As a direct result of the lack of catch data, all estimates of potential yield and production in the country are based on applying empirical relationships to morphological and chemical data for water bodies. While these relationships have been shown to be more than incidental (Ryder, 1965), they are, at best, only very rough indications of potential yield. Some data are, however, available. Recreational anglers have good competition data and nature conservation authorities keep records on catches and licence allocations. A collation of such data in a centralised database would provide important planning information for a variety of different impoundments.
There have been numerous attempts to develop fisheries in rural areas. Documented evidence shows that almost all have failed. Others have never been reassessed after the initial development and so there are no actual data upon which an analysis of the success or failure of interventions could be based.
Economic assessments of inland fisheries are also very few. Those that have been undertaken, however, indicate that recreational fisheries contribute significantly to provincial and national economies (Cadieux, 1980a; Brand et al., 2009; Du Preez and Lee, 2010; Leibold and Van Zyl, 2010). This lack of information on the value of fisheries is a global problem, and Cowx and Gerdeaux (2004) point out that fisheries tend to be poorly- or under-valued in multiple aquatic resource user scenarios. Further valuation studies, such as that of Du Preez and Lee (2010) showing the benefits of recreational fishing to rural communities, are required if informed choices are to be made regarding the promotion of inland fisheries for rural livelihood development.
Additional information limitations include information on inland fisheries governance, fishery governance systems, licensing, resource allocations and policy. User conflicts, particularly between recreational and subsistence and commercial fishers, are mentioned in some publications (Weyl et al., 2007; Weyl et al., 2010a) and exist in many fisheries. However, there is little documented evidence on these conflicts, understanding the causes behind them is however essential for fisheries development and policy formulation.
The present literature survey reveals an urgent need for research covering the biological, social, economic and governance aspects, if inland fisheries are to be developed in a rational and sustainable manner which promotes South Africa's national policy goals.
This paper was developed as part of a larger Water Research Commission (WRC) solicited and funded 'baseline and scoping study on the development and sustainable use of storage dams for inland fisheries and their contribution to rural livelihoods' (WRC Project No. K5/1957/4). This research was also financially supported by the National Research Foundation (NRF) of South Africa. We thank 2 anonymous referees for their valuable comments.
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Received 16 May 2011;
Accepted in revised form 2 April 2012.