Abstract

GLEESON, EY; VAN DER MERWE, AJW; HOFFMAN, LC  and  PIETERSE, E. Chrysomya chloropyga (copper-tailed blowfly) larvae reared on abattoir waste as a protein source for broiler production: carcass traits, meat quality and sensory attributes. AE [online]. 2023, vol.31, pp.1-8. ISSN 2224-8854.  http://dx.doi.org/10.17159/2254-8854/2023/a16258.

The larvae of the copper-tailed blowfly (Chrysomya chloropyga) have the potential to break down high-risk waste such as abattoir waste and ameliorate the nutrients to be reintroduced into the food chain by including them in broiler feeds. Chrysomya chloropyga larvae were grown on abattoir waste, harvested, processed, and included in broiler diets at inclusion rates of either 5, 10 or 15%. Thereafter the carcass traits, meat quality characteristics and descriptive sensory attributes were determined. Further to this the mineral content of the tibia, as well as the tibia bone strength were determined. The highest inclusion rate of 15% resulted in broiler carcass and meat characteristics that were on par with a formulated soya-based control diet. The chemical composition of the meat was predominantly not significantly affected by the dietary larval meal inclusion (p > 0.05). In terms of its sensory attributes, meat from broilers fed C. chloropyga meal showed some significant differences for chicken aroma and initial juiciness (p < 0.05). However, no significant differences were observed for any of five other sensory attributes of importance. Interestingly, the dietary inclusion of C. chloropyga meal was significantly related to increased tibia potassium and iron content, which could be linked to the insects' accumulating these minerals present in the abattoir waste. The results indicate that C. chloropyga larval meal could be included in broiler diets at up to 15% without any negative effects on the aforementioned characteristics and could even influence them positively.

Keywords : circular economy; chicken feed; copper-tailed blowfly; insect; larval meal; waste valorisation.

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