Physiological traits of income breeding strategy in the sea cucumber Apostichopus japonicus
Physiological traits of income breeding strategy in the sea cucumber Apostichopus japonicus
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DOI：
10.1016/j.aquaculture.2021.736646
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发表时间：
2021-03
期刊：
影响因子：
4.5
通讯作者：
Xiaoshang Ru;Libin Zhang;Shilin Liu;Yun-Liang Jiang;Long Li
中科院分区：
文献类型：
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作者：
Xiaoshang Ru;Libin Zhang;Shilin Liu;Yun-Liang Jiang;Long Li
仿刺参（Apostichopus）是亚洲国家重要的海水养殖品种。A. japonicus认为，利用收入资源支持性腺发育可能是一种适当的生活史策略，但这种方法涉及的生理机制尚不清楚。在这项研究中，我们进行了三个实验，以评估生理特性的基础收益育种策略的A。- 是的根据碳和氮稳定同位素特征推断，结果表明，收入育种允许所有成年人，即使是身体状况差和母体体积小的个体，通过灵活调整其生殖输出来每年繁殖。此外，在功能上，我们发现海参在繁殖过程中同时将收入资源分配给繁殖、生长和贮藏的需求。Na+/K+-ATP酶、己糖激酶和丙酮酸激酶活性的动态变化表明，收入养殖对繁殖成虫造成了代谢负担。本研究结果为海参收益育种策略的生理机制提供了新的认识。
The sea cucumber,Apostichopus japonicus, is an important marine aquaculture species in Asian countries. The small body size but high fecundity ofA. japonicussuggests that using income resources to support gonad development might be an appropriate life history strategy, but the physiological mechanisms involved in this approach remain unclear. In this study, we conducted three experiments to assess the physiological traits that underlie income breeding strategy of theA. japonicus. As inferred by the carbon and nitrogen stable isotope signatures, the results showed that income breeding allows all adults, even individuals with poor body condition and small maternal size, to reproduce annually by flexibly adjusting their reproductive output. In addition, functionally, we found that the sea cucumbers allocate income resources to the demands of reproduction, growth and storage simultaneously during reproduction. However, dynamic changes of activities of Na+/K+-ATPase, hexokinase and pyruvate kinase suggested that income breeding places a metabolic burden on the breeding adults. Our results provided new insights into the physiological mechanisms underlying income breeding strategy in sea cucumbers.