Bartucz Tamás, Csókás Endre, Nagy Borbála, Gyurcsák Márk Péter, Bokor Zoltán, Bernáth Gergely, Molnár József, Urbányi Béla, Csorbai Balázs
Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences (MATE), 2100 Godollo, Hungary.
Life (Basel). 2023 Sep 28;13(10):1978. doi: 10.3390/life13101978.
In the experiments, defatted black soldier fly meal reared on vegetable byproducts was used in the fry rearing of two economically important fish species, African catfish and rainbow trout. Both fish species were reared in a recirculation system and 0-33-66-100% of the complex fry feed was replaced by a defatted prepupae meal of black soldier flies during a 28-day feeding experiment. African catfish was reared at 25 ± 1 °C while rainbow trout was reared at 12 ± 1 °C. The results showed that the growth of African catfish was not significantly reduced when 66% of the feed was replaced by soldier fly meal (mean weight in the control fish group at the end of the experiment was 0.4632 ± 0.2469 g, while the 66% group resulted mean weights of 0.4150 ± 0.1886 g) and the survival did not show any statistically different results (mean survival in control group was 57.48 ± 13.76% while it was 56.6 ± 7.763% in the 66% group). In the case of rainbow trout, replacing the feed entirely with insect meal did not cause a decrease in weight gain (final mean weight in the control group was measured at 1.9640 ± 0.4154 g, while in the group consuming only insect meal, it was 1.9410 ± 0.4248 g) or in survival (in the control group 98.5%, while in the group consuming only insect meal 99.5%). All these preliminary results indicate that black soldier fly meal can be used directly as a nursery feed in fish farming as a partial or total replacement of complete feeds. The results showed that black soldier fly meal could replace 66% of the complex brood feed of African catfish and up to 100% of rainbow trout feed without deterioration of production results. Our experiments have therefore opened the way for further experiments on insect meal in larval rearing.
在实验中，用蔬菜副产品饲养的脱脂黑水虻粉被用于两种具有重要经济价值的鱼类——非洲鲶鱼和虹鳟鱼的鱼苗培育。两种鱼类均在循环水系统中饲养，在为期28天的投喂实验中，复合鱼苗饲料的0 - 33 - 66 - 100%被黑水虻的脱脂预蛹粉替代。非洲鲶鱼在25±1℃的环境中饲养，而虹鳟鱼在12±1℃的环境中饲养。结果表明，当66%的饲料被黑水虻粉替代时，非洲鲶鱼的生长并未显著降低（实验结束时对照组鱼的平均体重为0.4632±0.2469克，而66%替代组的平均体重为0.4150±0.1886克），且存活率未显示出任何统计学上的差异结果（对照组的平均存活率为57.48±13.76%，而66%替代组为56.6±7.763%）。对于虹鳟鱼而言，完全用昆虫粉替代饲料并未导致体重增加下降（对照组的最终平均体重为1.9640±0.4154克，而仅食用昆虫粉的组为1.9410±0.4248克）或存活率下降（对照组为98.5%，而仅食用昆虫粉的组为99.5%）。所有这些初步结果表明，黑水虻粉可直接用作养鱼业中的育苗饲料，部分或全部替代完整饲料。结果表明，黑水虻粉可替代非洲鲶鱼复合亲鱼饲料的66%以及虹鳟鱼饲料的100%，而不会使生产结果变差。因此，我们的实验为幼虫饲养中昆虫粉的进一步实验开辟了道路。
