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首页> 外文期刊>Marine biology >The effects of temperature and salinity on egg production and hatching success of Baltic Acartia tonsa (Copepoda: Calanoida): a laboratory investigation
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The effects of temperature and salinity on egg production and hatching success of Baltic Acartia tonsa (Copepoda: Calanoida): a laboratory investigation

机译：温度和盐度对波罗的海car螨产卵和孵化成功的影响：（实验室）调查

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摘要

The functional response of the aspects of reproductive success of a southwestern Baltic population of Acartia tonsa (Copepoda: Calanoida) was quantified in the laboratory using wide ranges in temperatures and salinities. Specifically, daily egg production (EP, # female~(-1) day~(-1)) was determined for 4 or 5 days at 18 different temperatures between 5 and 34℃ and the time course and success of hatching were evaluated at 10 different temperatures between 5 and 23℃. The effect of salinity (0 to 34 psu) on egg hatching success was also examined. The highest mean rates of EP were observed between 22 and 23℃ (46.8-50.9 eggs female~(-1) day~(-1)). When studied at 18 psu, hatching success of eggs increased with increasing temperature and was highest (92.2%) at 23℃. No hatching was observed for eggs incubated at low temperatures ( ≤ 12℃) that were produced by females acclimated to temperatures ≤ 10℃ indicating a possible thermal threshold between 10.0 and 13.0℃ below which only the production of diapause (or low quality) eggs exists in this population. When tested at 18℃, the hatching success of eggs incubated at 15 different salinities increased asymptotically with increasing salinity and was maximal (81.4-84.5%) between 17 and 25 psu. The high reproductive success observed over wide ranges in temperatures and salinities in this Baltic population demonstrates one of the mechanisms responsible for the cosmopolitan distribution of this species within productive, estuarine and marine habitats.
机译：在实验室中，温度和盐度的变化范围很广，定量了西南波罗的海A虫（Acartiatonsa）（Copepoda：Calanoida）繁殖成功方面的功能响应。具体来说，在5至34℃之间的18个不同温度下，确定4或5天的每日产卵量（EP，＃female〜（-1）day〜（-1）），并在10时评估孵化的时间过程和成功率5至23℃之间的温度不同。还检查了盐度（0至34 psu）对卵孵化成功的影响。在22至23℃之间观察到最高的EP平均率（46.8-50.9个卵雌性〜（-1）日〜（-1））。以18 psu进行研究时，卵的孵化成功率随温度升高而增加，在23℃时最高（92.2％）。在低温（≤12℃）下孵化的雌性卵在不超过10℃的温度下孵化未观察到孵化，这表明可能存在10.0到13.0℃的温度阈值，低于该阈值仅存在滞育（或劣质）卵在这个人口中。在18℃下进行测试时，在15种不同盐度下孵化的卵的孵化成功率随着盐度的增加而渐近增加，在17至25 psu之间最大（81.4-84.5％）。在该波罗的海种群中，在温度和盐度的广泛范围内观察到的高繁殖成功表明，该物种在生产，河口和海洋生境中世界化分布的机制之一。

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  • 来源
    《Marine biology》 |2006年第5期|p.1061-1070|共10页
  • 作者

    Linda Holste; Myron A. Peck;

  • 作者单位

    Institute for Hydrobiology and Fisheries Research, University of Hamburg, Olbersweg 24, 22767 Hamburg, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境生物学;
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