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首页> 外文期刊>Biological Journal of the Linnean Society >Effect of oceanographic barriers and overfishing on the population genetic structure of the European spiny lobster (Palinurus elephas)
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Effect of oceanographic barriers and overfishing on the population genetic structure of the European spiny lobster (Palinurus elephas)

机译：海洋学壁垒和过度捕捞对欧洲多刺龙虾（Palinurus elephas）种群遗传结构的影响

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摘要

Defining population structure and genetic diversity levels is of the utmost importance for developing efficient conservation strategies. Overfishing has caused mean annual catches of the European spiny lobster (Palinurus elephas) to decrease alarmingly along its distribution area. In this context, there is a need for comprehensive studies aiming to evaluate the genetic health of the exploited populations. The present study is based on a set of ten nuclear markers amplified in 331 individuals from ten different localities covering most of P. elephas distribution area. Samples from Atlantic and Mediterranean basins showed small but significant differences, indicating that P. elephas populations do not behave as a single panmictic unit but form two partially-overlapping groups. Despite intense overfishing, our dataset did not recover a recent bottleneck signal, and instead showed a large and stable historical effective size. This result could be accounted for by specific life-history traits (reproduction and longevity) and the limitations of molecular markers in covering recent timescales for nontemporal samples. The findings of the present study emphasize the need to integrate information on effective population sizes and life-history parameters when evaluating population connectivity levels from genetic data
机译：定义种群结构和遗传多样性水平对于制定有效的保护战略至关重要。过度捕捞已使欧洲多刺龙虾（Palinurus elephas）的平均年捕捞量沿其分布区域急剧下降。在这种情况下，需要进行全面的研究，以评估被开发种群的遗传健康状况。本研究基于一组十个核标记，这些标记在来自十个不同地区的331个个体中扩增，覆盖了大部分P. elephas分布区域。来自大西洋和地中海盆地的样本显示出微小但显着的差异，表明线虫种群并不表现为单一的恐慌单元，而是形成两个部分重叠的群体。尽管过度捕捞，我们的数据集仍未恢复到最近的瓶颈信号，而是显示了较大且稳定的历史有效尺寸。特定的生命历史特征（繁殖和寿命）以及分子标记物在涵盖非时间样本的近期时标方面的局限性可以解释这一结果。本研究的结果强调，在评估遗传数据中的人口连通性水平时，有必要整合有关有效人口规模和生活史参数的信息

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