Black soldier fly larvae (BSFL; Hermetia illucens) can be a very beneficial source of protein to replace fishmeal for fish feed, but little is known about the impact of their growing substrate on the performance and nutritional composition of the fish consuming them. In this study, BSFL were reared on two different substrates; palm oil decanter cake (DC) and coconut pulp (CP) for 35 days before processing and including them in tilapia diet with 50% inclusion level. The weight and length of the BSFL as well as waste reduction efficiency was observed. The fish were assigned to three different diets, namely DC50 (50% BSFL from DC), CP50 (50% BSFL from CP) while 100FM (100% fishmeal) is treated as a control. The fish performance, feed efficiency and nutritional composition of their body after 4-weeks of feeding trial were observed. The results indicate that BSFL cultured in DC obtained higher body weight gain but less efficient in reducing waste compared to those cultured in CP. The utilisation of 50% inclusion level of BSFL cultured in DC for tilapia diet improves growth and feed efficiency. However, the inclusion of all experimental diets has a less pronounced effect on protein and ash body composition; although fish fed with CP50 has the least lipid body composition compared to other treatments. The experiment demonstrated that replacement of fishmeal by BSFL cultured in different substrates would influence the performance of fish consuming it. Results of the present study will offer an optimal solution, especially for large-scale commercial BSFL cultivation.

中文翻译：

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罗非鱼饮食中不同基质上饲养的Hermetia illucens幼虫的比较评价：对生长和身体组成的影响

黑人士兵蝇幼虫（BSFL; Hermetia illucens）是代替鱼粉替代鱼饲料的非常有益的蛋白质来源，但鲜为人知的是其生长底物对食用鱼粉的鱼的性能和营养成分的影响知之甚少。在这项研究中，将BSFL饲养在两种不同的基材上。加工前将棕榈油de水器蛋糕（DC）和椰子浆（CP）放置35天，然后将其包含在罗非鱼饮食中，并纳入50％的含量。观察到BSFL的重量和长度以及废物减少效率。将鱼分为三种不同的饮食，即DC50（来自DC的50％BSFL），CP50（来自CP的50％BSFL），而100FM（100％鱼粉）作为对照。在喂食试验的4周后，观察了它们的鱼的性能，饲料效率和营养成分。结果表明，与在CP中培养的BSFL相比，在DC中培养的BSFL获得更高的体重增加，但是在减少废物方面效率较低。罗非鱼日粮中DC培养的BSFL包含50％的添加水平可改善生长和饲料效率。但是，所有实验饮食的加入对蛋白质和灰分的身体成分的影响较小。尽管与其他处理相比，饲喂CP50的鱼的脂质体成分最少。实验表明，用不同基质中培养的BSFL代替鱼粉会影响食用鱼粉的性能。本研究的结果将提供最佳的解决方案，尤其是对于大规模商业BSFL种植。罗非鱼日粮中DC培养的BSFL包含50％的添加水平可改善生长和饲料效率。但是，所有实验饮食的加入对蛋白质和灰分的身体成分的影响较小。尽管与其他处理相比，饲喂CP50的鱼的脂质体成分最少。实验表明，用不同基质中培养的BSFL代替鱼粉会影响食用鱼粉的性能。本研究的结果将提供最佳的解决方案，尤其是对于大规模商业BSFL种植。罗非鱼日粮中DC培养的BSFL包含50％的添加水平可改善生长和饲料效率。但是，所有实验饮食的加入对蛋白质和灰分的身体成分的影响较小。尽管与其他处理相比，饲喂CP50的鱼的脂质体成分最少。实验表明，用不同基质中培养的BSFL代替鱼粉会影响食用鱼粉的性能。本研究的结果将提供最佳的解决方案，尤其是对于大规模商业BSFL种植。尽管与其他处理相比，饲喂CP50的鱼的脂质体成分最少。实验表明，用不同基质中培养的BSFL代替鱼粉会影响食用鱼粉的性能。本研究的结果将提供最佳的解决方案，尤其是对于大规模商业BSFL种植。尽管与其他处理相比，饲喂CP50的鱼的脂质体成分最少。实验表明，用不同基质中培养的BSFL代替鱼粉会影响食用鱼粉的性能。本研究的结果将提供最佳的解决方案，尤其是对于大规模商业BSFL种植。