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首页> 外文期刊>Estuarine Coastal and Shelf Science >Life history variation in a marine teleost across a heterogeneous seascape
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Life history variation in a marine teleost across a heterogeneous seascape

机译：跨异质海洋景观中海洋硬骨鱼的生活史变化

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摘要

Life history traits, primarily related to growth and reproduction, often reflect the process of adaptation of organisms to their natural environment. Consequently, life history parameters are expected to differ along heterogeneous habitats. Provided the pivotal role of life-history traits in determining fitness, the description and understanding of life history variation is a central goal in evolutionary ecology. In order to test the influence of the known environmental heterogeneity of Mediterranean coastal seas, pop ulations of the striped sea bream Lithognathus mormyrus, were sampled from five distinct geographic areas within, or adjacent to, the Mediterranean basin (Aboran Sea, Balearic Sea, Tyrrhenian Sea, Adriatic Sea and the Gulf of Cadiz in the Atlantic Ocean). Growth patterns, maturation, sex-ratio, sex change and feeding habits were investigated over two years and revealed large-scale life history variation. Similarly slanted growth, earlier maturation times and smaller size-at-sex change were found in the Tyrrhenian and the Adriatic populations, which appear in contrast with recent population genetic investigation. The potential influence of fishery exploitation on these traits is discussed as a possible determining factor. The present study provides an exemplar of life-history variation across a heterogeneous seascape and makes a case for a more judicious consideration of ecological information for the purpose of identifying population units for management and conservation.
机译：主要与生长和繁殖有关的生活史特征通常反映了生物适应自然环境的过程。因此，生活史参数在不同的生境中会有所不同。提供生活史特征在确定适应性方面的关键作用，对生活史变异的描述和理解是进化生态学的中心目标。为了测试已知的地中海沿海海洋环境异质性的影响，从地中海盆地内（或附近）的五个不同地理区域（阿博兰海，巴利阿里海，第勒尼安海域）采样了条纹鲷鱼的种群数量。海，亚得里亚海和加的斯湾在大西洋中）。研究了两年的生长方式，成熟度，性别比，性别变化和进食习惯，发现了大规模的生活史变异。在第勒尼安和亚得里亚海种群中也发现了类似的倾斜生长，更早的成熟时间和较小的性别变化，这与最近的种群遗传学研究形成了鲜明的对比。讨论了渔业开发对这些性状的潜在影响，作为可能的决定因素。本研究提供了跨异质海洋景观的生活史变化的典范，并为更明智地考虑生态信息以识别用于管理和保护的人口单位提供了理由。

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