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首页> 外文期刊>Fisheries and Aquatic Sciences >Effects of Incubation Temperature on Egg Development, Hatching and Pigment Plug Evacuation in Farmed Siberian Sturgeon Acipenser baerii
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Effects of Incubation Temperature on Egg Development, Hatching and Pigment Plug Evacuation in Farmed Siberian Sturgeon Acipenser baerii

机译：孵化温度对养殖西伯利亚St鱼卵发育，孵化和色素塞疏散的影响

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摘要

Early ontogenic development in Siberian sturgeon Acipenser baerii was documented and the effects of different temperatures on embryonic and prelarval development were examined. Photograph-assisted data on morphogenesis in Siberian sturgeon prolarvae agreed well with published descriptions of their ontogeny and ecological behaviors, although certain aspects of differentiation, such as gill covering and scute development, could be rearing condition-sensitive. The present study provides the first characterization of the transient development of teeth during early larval stages; the pattern was congruent with the transition of prolarvae to exogenous feeding. From examinations of embryonic and prelarval development under different temperature conditions ( ), developmental speed was inversely related with temperature. Overall, hatchability was higher and hatching events were more synchronized at than at lower temperatures. After hatching, similar patterns of temperature-dependency were observed in yolk sac absorption and the evacuation of the pigment plug. Our results suggest that the incubation of Siberian sturgeon embryos and prolarvae at temperatures close to would be advantageous in hatcheries, based on reductions in the duration and uniformity of egg and prolarval developmental stages.
机译：记录了西伯利亚st鱼Acipenser baerii的早期个体发育，并研究了不同温度对胚胎和幼体发育的影响。用照片辅助的西伯利亚urge鱼幼体形态发生数据，与已发表的关于它们的个体发育和生态行为的描述非常吻合，尽管分化的某些方面（例如g覆盖和sc发育）可能对条件敏感。本研究提供了幼虫早期牙齿瞬时发展的第一个特征。该模式与幼体向外源性摄食的过渡一致。通过检查不同温度条件下的胚胎和幼虫的发育，发育速度与温度成反比。总体而言，与在较低温度下相比，孵化率更高，孵化事件更同步。孵化后，在卵黄囊吸收和色素栓的排出中观察到类似的温度依赖性模式。我们的研究结果表明，基于减少卵的持续时间和均匀度以及幼体发育阶段，西伯利亚iber鱼胚胎和幼体在接近200℃的温度下孵化对于孵化场将是有利的。

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