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首页> 外文期刊>Estuarine Coastal and Shelf Science >Seasonal variability in somatic and reproductive investment of the bivalve Scrobicularia plana (da Costa, 1778) along a latitudinal gradient
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Seasonal variability in somatic and reproductive investment of the bivalve Scrobicularia plana (da Costa, 1778) along a latitudinal gradient

机译：双壳类Scrobicularia Plana（da Costa，1778）沿纬度梯度的体细胞和生殖投资的季节性变化

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摘要

Monthly investment in soma and gonads in the bivalve Scrobicularia plana is described for three populations along its distributional range: Minho estuary, Portugal; Westerschelde estuary, The Netherlands and Buvika estuary, Norway. Seasonal cycles in body mass (BMI), somatic mass (SMI) and gonadal mass (GMI) indices were observed for all populations. In Portugal, BMI and SMI peaked in mid-autumn, while in The Netherlands both indices were at their highest in mid-spring. Norway showed a different pattern with two distinct peaks: one in mid-autumn and a second peak in spring. GMI reached maximum values in July in Portugal and Netherlands and in June in Norway. Overall, mean BMI and SMI were lower in Portugal while mean GMI was lower in Norway. The spawning period lasted the whole summer in Portugal, but was shorter (only two months) in The Netherlands and Norway. The reproductive investment in The Netherlands was significantly higher than in Portugal and Norway, with the lowest values being observed in Norway. Differences in annual cycles between populations were attributed to environmental factors, namely temperature and food availability. Temperature seems important in shaping the reproductive pattern with more northern populations showing shorter reproductive periods starting later in the year, and a lower reproductive output. In addition, winter water temperatures can explain the lower mean body and somatic mass values observed in Portugal. Food availability influenced the physiological performance of the species with peaks in somatic mass coinciding with phytoplankton blooms. This relation between physiological performance and environmental factors influences S. plana distribution, densities and even survival, with natural consequences on its commercial importance.
机译：描述了分布在其分布范围内的三个种群的双壳类Scrobicularia Plana的体细胞和性腺的月度投资：葡萄牙Minho河口；荷兰的韦斯特切尔德河口和挪威的布维卡河口。在所有人群中均观察到了体重（BMI），体质量（SMI）和性腺质量（GMI）指数的季节性周期。在葡萄牙，BMI和SMI在秋季中期达到峰值，而在荷兰，这两个指数均在春季中期达到最高。挪威表现出不同的模式，有两个明显的高峰：一个在中秋，另一个在春季。 GMI在葡萄牙和荷兰分别在7月和挪威的6月达到最大值。总体而言，葡萄牙的平均BMI和SMI较低，而挪威的平均GMI较低。产卵期在整个葡萄牙持续整个夏季，但在荷兰和挪威则较短（仅两个月）。荷兰的生殖投资显着高于葡萄牙和挪威，挪威的最低。人口之间年周期的差异归因于环境因素，即温度和食物供应。温度在塑造生殖方式方面似乎很重要，更多的北方人口从今年晚些时候开始表现出较短的生殖期，而生殖产量较低。此外，冬季的水温可以解释葡萄牙观测到的较低的平均身体和身体质量值。食物的供应量影响了该物种的生理性能，其体细胞质量的峰值与浮游植物的开花相吻合。生理性能和环境因素之间的这种关系影响平坦链球菌的分布，密度甚至存活，对其商业重要性具有自然的影响。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2011年第1期|p.19-26|共8页
  • 作者

    Silvia Santos; Joana F.M.F. Cardoso; Célia Carvalho; Pieternella C. Luttikhuizen; Henk W. van der Veer;

  • 作者单位

    NIOZ - Royal Netherlands Institute for Sea Research, PO Box 59, 1790 AB Den Burg Texel, The Netherlands;

    NIOZ - Royal Netherlands Institute for Sea Research, PO Box 59, 1790 AB Den Burg Texel, The Netherlands,CIMAR/CIIMAR — Centro Interdisciplinar de Investigacao Marinha e Ambiental - Universidade do Porto, Rua dos Bragas, 289, 4050-123 Porto, Portugal;

    NIOZ - Royal Netherlands Institute for Sea Research, PO Box 59, 1790 AB Den Burg Texel, The Netherlands;

    NIOZ - Royal Netherlands Institute for Sea Research, PO Box 59, 1790 AB Den Burg Texel, The Netherlands;

    NIOZ - Royal Netherlands Institute for Sea Research, PO Box 59, 1790 AB Den Burg Texel, The Netherlands;

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  • 正文语种 eng
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  • 关键词

    scrobicularia plana; seasonal cycle; life history; latitude; temperature;

    机译：轮盘菌;季节周期;生活史;纬度;温度;

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