Figure 1. Comparison of pig behaviour between the control and BSF larvae (LAR) provisioning
feed efficiency, energy efficiency and average daily gain illustrates the nutritional equivalence of BSF to feed on a dry matter basis in the current experimental setting – highlighting the potential nutritional value of BSF for pigs. It is important to note that availability of BSF in the current study was restricted to a fixed daily portion, and that ad libitum provisioning immediately post-weaning, when solid feed intake is generally low, might boost piglet performance by increasing nutrient intake.
Nutritional and welfare benefi ts combined From this study, post-weaning live BSF provisioning has beneficial effects on piglet welfare, as it facilitates exploration behaviours and reduces the piglet’s need to orally manipulate objects and pen mates. These welfare benefits are likely amplified in commercial pig husbandry conditions, but this merits further investigation in future studies. In future, studies should also consider appropriate larvae provisioning methods under commercial conditions, as scattering larvae on slatted floors is impractical. The performance of piglets that consumed the larvae was maintained, as no differences from the SBM diet were observed, showing the potential of BSF to replace SBM in pig diets. However, it goes without mentioning that optimizing a pig diet including larvae requires further research into the complete nutrient composition and digestibility of the larvae, to fully harness the nutritional and welfare benefits.
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