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Novel Experimental Methods for the Investigation of Hermetia illucens (Diptera: Stratiomyidae) Larvae.
Journal of Insect Science ( IF 2.1 ) Pub Date : 2020-06-27 , DOI: 10.1093/jisesa/ieaa057
Moritz Gold 1, 2 , Melanie Binggeli 1 , Fabienne Kurt 3 , Tomas de Wouters 3 , Markus Reichlin 3 , Christian Zurbrügg 2 , Alexander Mathys 1 , Michael Kreuzer 4
Affiliation  

Large-scale insect rearing for food and feed production can be improved by understanding diet digestion and host–microbe interactions. To examine these processes in black soldier fly (Hermetia illucens L.; Diptera: Stratiomyidae) larvae, two protocols were developed. Protocol 1 describes a method to produce viable, sterile black soldier fly larvae and a gentle method for diet sterilization. Sterile black soldier fly larvae can be used to study the diverse role of microbes in larval development. Nutrient requirements of sterile black soldier fly larvae are met only through diet. Viable sterile black soldier fly larvae were consistently generated using a four-step treatment with alternating immersions of eggs for 2 min each in ethanol (70%) and sodium hypochlorite (0.6%), over two cycles. A nonthermal method of diet sterilization, namely high-energy electron beam (HEEB) treatment, was introduced. Subsequently, growth of sterile black soldier fly larvae was observed on the HEEB-treated diets (40, 60, and 40% of replicates with poultry feed, liver pie, and an artificial diet, respectively) but not on autoclaved diets. In Protocol 2, we propose a novel method to collect frass from individual larvae. We then measured the metabolites in frass, using high-pressure liquid chromatography. Results on metabolites confirmed the influence of digestion. For instance, succinate increased from 1 to 2 and 7 μmol/g sample from diet to gut homogenate and frass, respectively. The collection method is a promising tool to estimate the diet and nutrient requirements of black soldier fly larvae, thus increasing the performance and reliability of black soldier fly larvae rearing. We discuss in detail the possible applications and limitations of our methods in black soldier fly larvae research.

中文翻译:

调查Hermetia illucens(Diptera:Stratiomyidae)幼虫的新实验方法。

通过了解饮食消化和宿主-微生物相互作用,可以改善用于食品和饲料生产的大规模昆虫饲养。为了检查黑士兵苍蝇的这些过程(Hermetia illucensL .; Diptera:Stratiomyidae)幼虫,开发了两种方案。方案1描述了一种生产可行的,无菌的黑战士蝇幼虫的方法以及一种用于饮食杀菌的温和方法。不育的黑士兵蝇幼虫可用于研究微生物在幼虫发育中的不同作用。仅通过饮食即可满足不育黑士兵蝇fly幼虫的营养需求。通过两个步骤将鸡蛋交替浸入乙醇(70%)和次氯酸钠(0.6%)中2分钟,进行四步处理,持续产生可行的无菌黑战士蝇幼虫。介绍了一种非热的饮食杀菌方法,即高能电子束(HEEB)处理。随后,在经过HEEB处理的日粮中观察到无菌黑士兵蝇幼虫的生长(40%,60%和40%的重复使用家禽饲料,肝派和人工饮食),但不包括高压灭菌饮食。在协议2中,我们提出了一种从各个幼虫中收集青菜的新颖方法。然后,我们使用高压液相色谱法测量了苦味中的代谢产物。代谢产物的结果证实了消化的影响。例如,从饮食中,琥珀酸盐从1到2和7μmol/ g样品分别增加到肠道匀浆和无味。该收集方法是估计黑蝇fly幼虫饮食和营养需求的有前途的工具,从而提高了黑蝇rear幼虫的饲养性能和可靠性。我们详细讨论了我们的方法在黑战士蝇幼虫研究中的可能应用和局限性。我们提出了一种从个体幼虫中收集青菜的新方法。然后,我们使用高压液相色谱法测量了苦味中的代谢产物。代谢产物的结果证实了消化的影响。例如,琥珀酸从饮食中的1-2分别增加到2和7μmol/ g,分别是肠道匀浆和无味。该收集方法是估计黑蝇fly幼虫饮食和营养需求的有前途的工具,从而提高了黑蝇rear幼虫的饲养性能和可靠性。我们详细讨论了我们的方法在黑战士蝇幼虫研究中的可能应用和局限性。我们提出了一种从个体幼虫中收集青菜的新方法。然后,我们使用高压液相色谱法测量了苦味中的代谢产物。代谢产物的结果证实了消化的影响。例如,从饮食中,琥珀酸盐从1到2和7μmol/ g样品分别增加到肠道匀浆和无味。该收集方法是估计黑蝇fly幼虫饮食和营养需求的有前途的工具,从而提高了黑蝇rear幼虫的饲养性能和可靠性。我们详细讨论了我们的方法在黑战士蝇幼虫研究中的可能应用和局限性。饮食中琥珀酸从1到2和7μmol/ g样品分别增加到肠道匀浆和无味。该收集方法是估计黑蝇fly幼虫饮食和营养需求的有前途的工具,从而提高了黑蝇rear幼虫的饲养性能和可靠性。我们详细讨论了我们的方法在黑战士蝇幼虫研究中的可能应用和局限性。饮食中琥珀酸从1到2和7μmol/ g样品分别增加到肠道匀浆和无味。该收集方法是估计黑蝇fly幼虫饮食和营养需求的有前途的工具,从而提高了黑蝇rear幼虫的饲养性能和可靠性。我们详细讨论了我们的方法在黑战士蝇幼虫研究中的可能应用和局限性。
更新日期:2020-06-28
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