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首页> 外文期刊>Russian journal of marine biology >Adaptivity of the Bivalve Mytilus trossulus Larvae to Short- and Long-Term Changes in Water Temperature and Salinity
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Adaptivity of the Bivalve Mytilus trossulus Larvae to Short- and Long-Term Changes in Water Temperature and Salinity

机译：双壳双壳菌幼虫对水温和盐度短期和长期变化的适应性

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摘要

Adaptivity to short-term and long-term changes in water temperature and salinity was studied in larvae of the bivalve mollusk Mytilus trossulus. It was shown that water temperature of 4℃ mostly suppressed growth and development of larvae. A temperature of 20℃ promoted an enhanced larval growth and development. Though a temperature of 20℃ caused enhanced larval growth, the temperature was not optimal, while its effect caused quality diversity of larval development, owing to the difference in their growth rates. Such diversity was not observed at moderate temperatures of 10 and 15℃. At 20℃, fast-growing mussel larvae were very sensitive to temperature drops. Growth of slowly-growing individuals did not depend on temperature in the range of 10 to 20℃. Daily temperature variations by 3-8℃ did not markedly affect growth and development of the larvae. A continuous 24-h exposure to temperature drops by 3-8℃ did not influence these very important physiological characteristics either. A salinity drop down to 8 per thousand exerted an adverse effect only on early larvae. Later on, the larvae showed their ability to adapt to such a strong desalination. The negative effect of reduced salinity (to 8 per thousand) upon mussel larvae was increased at a temperature increase to 20℃.
机译：研究了双壳软体动物Mytilus trossulus幼虫对水温和盐度短期和长期变化的适应性。结果表明，4℃的水温主要抑制幼虫的生长发育。 20℃的温度促进了幼虫的生长和发育。尽管20℃的温度促进了幼虫的生长，但温度不是最佳的，但由于生长速度的差异，其作用导致了幼虫发育的质量多样性。在10和15℃的中等温度下没有观察到这种多样性。在20℃时，快速生长的贻贝幼虫对温度下降非常敏感。生长缓慢的个体的生长不依赖于10至20℃的温度。每日温度变化3-8℃并没有明显影响幼虫的生长和发育。连续24小时暴露于3-8℃的温度下降也不会影响这些非常重要的生理特征。盐度降至千分之八时，仅对早期幼虫产生不利影响。后来，幼虫表现出了适应这种强烈淡化的能力。在温度升高到20℃时，盐度降低（至千分之八）对贻贝幼虫的负面影响增加。

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