Hubei International Cooperation Base for Waste Conversion by Insects, Huazhong Agricultural University, Wuhan, 430070, China.
Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, Huazhong Agricultural University, Wuhan, 430070, China.
Environ Sci Pollut Res Int. 2017 Mar;24(9):8637-8644. doi: 10.1007/s11356-017-8550-3. Epub 2017 Feb 14.
The black soldier fly Hermetia illucens is a good candidate for waste management. The harvested insects are rich in protein and have the potential to be used in animal feed. However, people are wary about heavy metals in waste. Therefore, it is necessary to understand how the uptake of heavy metals could affect H. illucens and where and to what extent metals are accumulated by the black soldier fly. Based on these considerations, developmental parameters were investigated in the different life stages of H. illucens fed an increasing concentration gradient of cadmium (Cd) and chromium (Cr); additionally, Cd and Cr distribution in the body parts of H. illucens at the different life stages was monitored. We found that Cd and Cr have no effects on larvae survival and eclosion rate, but they do have effects on larvae duration and pupation rate. Both Cd and Cr were transferred into larvae, prepupae, and pupae. While the concentrations of Cd in larvae and prepupae were much higher than that in their diets, the opposite case was observed with Cr. The concentrations of Cd and Cr in H. illucens decreased in later development stages. In individual larva and prepupa, Cd and Cr were mainly included in the body and not in the integument. In the pupa, the puparium contained higher Cd and Cr concentrations than the pupa body. The distribution of Cd and Cr in the different life stages and body parts may present a potential strategy for how H. illucens tolerate and remove heavy metal stress.
黑腹果蝇 Hermetia illucens 是一种很好的废物管理候选生物。收获的昆虫富含蛋白质，有潜力被用作动物饲料。然而，人们对废物中的重金属持谨慎态度。因此，有必要了解重金属的摄取如何影响 H. illucens，以及金属在何处以及在多大程度上被黑腹果蝇积累。基于这些考虑，我们研究了 H. illucens 在不同发育阶段对不同浓度梯度镉（Cd）和铬（Cr）的吸收情况；此外，还监测了 H. illucens 在不同发育阶段的身体部位中 Cd 和 Cr 的分布情况。我们发现，Cd 和 Cr 对幼虫的存活率和羽化率没有影响，但对幼虫的持续时间和化蛹率有影响。Cd 和 Cr 都被转移到幼虫、预蛹和蛹中。虽然 Cd 在幼虫和预蛹中的浓度比其在饮食中的浓度高得多，但 Cr 的情况正好相反。随着幼虫和预蛹发育为成虫，H. illucens 体内的 Cd 和 Cr 浓度降低。在单个幼虫和预蛹中，Cd 和 Cr 主要存在于体内，而不是外骨骼中。在蛹中，蛹壳的 Cd 和 Cr 浓度比蛹体高。Cd 和 Cr 在不同发育阶段和身体部位的分布可能代表了 H. illucens 耐受和去除重金属胁迫的一种潜在策略。
