Bogevik André S, Hanson Erika, Samuelsen Tor Andreas, Kousoulaki Katerina
Department of Nutrition and Feed Technology, Nofima 5141, Fyllingsdalen, Norway.
Department of Animal and Aquaculture Sciences, NMBU 1432, Ås, Norway.
Aquac Nutr. 2025 May 6;2025:8827164. doi: 10.1155/anu/8827164. eCollection 2025.
Black soldier fly larvae (BSFL) meal is a promising sustainable protein source for aquafeeds. Processing BSFL into meal and oil can be based on wet rendering technology where the raw material is heat treated and mechanically separated into press cake, stickwater (SW), and oil. In this study, to verify the effect of SW reincorporation into the press cake, dried BSFL cake and SW meal were included in feed mixes before extrusion. Four experimental feeds were prepared, containing 100 g kg BSFL meal with a cake/SW ratio of 100/0, 90/10, 80/20 and 60/40 g kg, respectively and compared to a control feed in a trial with Atlantic salmon parr reared in freshwater. The feeds had similar nutritional value and all feeds were highly digestible. The highest content of manganese (Mn) was found in the BSFL cake feed (120 mgkg), was reduced with increased SW inclusion and lowest in the control feed. There were no dietary differences in growth or welfare with increased SW inclusion, and no negative impact of high dietary Mn levels. The high Mn content was not accumulated in the fish, and only resulted in an increased excretion of Mn. Further studies are needed to verify these results in Atlantic salmon postsmolt.
黑水虻幼虫粉是水产饲料中一种很有前景的可持续蛋白质来源。将黑水虻幼虫加工成粉和油可以基于湿法提炼技术，即对原材料进行热处理，然后机械分离成压榨饼、沥水（SW）和油。在本研究中，为了验证将沥水重新掺入压榨饼中的效果，在挤压前将干燥的黑水虻压榨饼和沥水粉包含在饲料混合物中。制备了四种实验饲料，分别含有100 g/kg的黑水虻粉，饼/沥水比例分别为100/0、90/10、80/20和60/40 g/kg，并在淡水养殖大西洋鲑幼鱼的试验中与对照饲料进行比较。这些饲料具有相似的营养价值，并且所有饲料都具有很高的消化率。在黑水虻压榨饼饲料中发现锰（Mn）含量最高（120 mg/kg），随着沥水添加量的增加而降低，在对照饲料中最低。随着沥水添加量的增加，生长或健康状况没有饮食差异，高饮食锰水平也没有负面影响。高锰含量没有在鱼体内积累，只是导致锰的排泄增加。需要进一步研究以在大西洋鲑后幼鱼中验证这些结果。
