The unicellular green alga Chlorogonium capillatum as a live food promotes the growth and survival of Artemia larvae
The unicellular green alga Chlorogonium capillatum as a live food promotes the growth and survival of Artemia larvae
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单细胞绿藻 Chlorogonia capillatum 作为活食促进卤虫幼虫的生长和存活
DOI：
10.1016/j.aquaculture.2022.739227
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发表时间：
2023
期刊：
影响因子：
4.5
通讯作者：
Suzaki Toshinobu
中科院分区：
文献类型：
--
作者：
Nishida Yuki;Hoshina Ryo;Higuchi Shinnosuke;Suzaki Toshinobu
刚孵化的鱼类和小型甲壳类动物以细菌和活原生动物等小型生物为食，统称为纤毛虫。这些动物的幼虫阶段在水产养殖渔业中至关重要;然而，商业纤毛虫的供应具有挑战性，因为天然存在的纤毛虫可能含有对幼虫有害的生物。卤虫（卤虫franciscana）需要适当的营养后立即孵化，否则他们死在几天内。本研究的目的是寻找适合用作这些动物的幼虫的活诱饵的原生生物。本研究以梨形四膜虫（Tetrahymena pyriformis）、纤细裸藻（Euglena gracilis）、细毛绿球藻（Chlorogoniumcapillatum）和变异小球藻（Chlorellavariabilis）作为饵料，对刚孵化的卤虫进行为期10天的饲养试验。根据卤虫幼体的存活率和生长率，确定了卤虫幼体的最适原生生物。在孵化后两天，对卤虫消化道内部进行显微镜观察，以确认原生生物足够小，可以被卤虫捕食。本研究发现C.结果表明，在成活率和生长率方面，capillatum的效果最好，适合作为卤虫幼体的饵料。结果表明，在所研究的5种原生生物中，C. capillatum是卤虫幼体最适宜的饵料。相反，当E. gracilis，表明E. gracilis含有对盐水虾有害的物质。这突出了需要对裸藻的安全性进行研究，近年来裸藻被高度视为具有高营养价值的优秀健康食品。
Freshly hatched fish and small crustaceans feed on small living organisms such as bacteria and living protozoa, collectively referred to as infusoria. The larval stage of these animals is crucial in aquaculture fisheries; however, the supply of commercial infusoria is challenging as naturally occurring infusoria may contain organisms that are harmful to larvae. Brine shrimp (Artemia franciscana) require proper nutrition immediately after hatching otherwise they die within a few days. The purpose of this study was to search for protists suitable for use as live bait for the larvae of these animals. In this study, Tetrahymena pyriformis (Ciliophora, Alveolata), Euglena gracilis (Excavata), andChlorogoniumcapillatumand Chlorellavariabilis(Archaeplastida) were fed to the freshly hatched brine shrimp for 10 days. The most suitable protist for the larvae was identified based on the survival and growth rate of the brine shrimp. Microscopic observation of the inside of the brine shrimp's digestive tract two days after hatching was used to confirm that protists were sufficiently small to be predated on by the brine shrimp. This study found thatC. capillatumwas the best in terms of both survival rate and growth rate and was suitable as a diet for brine shrimp larvae. The results indicate that of the five protists studied,C. capillatumis the most suitable food for brine shrimp larvae. In contrast, the survival rate of brine shrimp was significantly reduced whenE. graciliswas given, suggesting thatE. graciliscontains substances that are harmful to brine shrimp. This highlights a need for research into the safety of Euglena, which has been highly regarded in recent years as an excellent healthy food with high nutritional value.
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影响因子：
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作者：
S. Cheng;T. Suzaki;A. Hino
通讯作者：
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影响因子：
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作者：
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DOI：
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发表时间：
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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作者：
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