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首页> 外文期刊>Marine biology >Population structure and connectivity of the European conger eel (Conger conger) across the north-eastern Atlantic and western Mediterranean: integrating molecular and otolith elemental approaches
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Population structure and connectivity of the European conger eel (Conger conger) across the north-eastern Atlantic and western Mediterranean: integrating molecular and otolith elemental approaches

机译：横跨东北大西洋和地中海西部的欧洲海鳗（Conger conger）的种群结构和连通性：整合分子和耳石元素方法

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摘要

Genetic variation (mtDNA) of the European conger eel, Conger conger, was compared across five locations in the north-eastern Atlantic (Madeira, Azores, South Portugal, North Portugal and Ireland) and one location in the western Mediterranean (Mallorca). Genetic diversity of conger eel was high, and differentiation among regions was not significant. Additionally, comparisons of element:Ca ratios (Sr:Ca, Ba:Ca, Mn:Ca and Mg:Ca) in otolith cores (larval phase) and edges (3 months prior to capture) among the Azores, North Portugal, Madeira and Mallorca regions for 2 years indicated that variation among regions were greater for edges than cores. Therefore, while benthic conger may display residency at regional scales, recruitment may not necessarily be derived from local spawning and larval retention. Furthermore, data from ot-oliths suggest a separated replenishment source for western Mediterranean and NE Atlantic stocks. The combination of genetics and otolith chemistry suggests a population model for conger eel involving a broad-scale dispersal of larvae, with limited connectivity for benthic juvenile life stages at large spatial scales, although the existence of one or multiple spawning grounds for the species remains uncertain.
机译：比较了欧洲海鳗鳗的遗传变异（mtDNA），在东北大西洋的五个位置（马德拉岛，亚速尔群岛，南葡萄牙，北葡萄牙和爱尔兰）和地中海西部的一个位置（马洛卡）进行了比较。海鳗的遗传多样性较高，区域间的差异不显着。此外，在亚速尔群岛，北葡萄牙，马德拉群岛和亚速尔群岛的耳石核心（幼虫相）和边缘（捕获前3个月）中元素：Ca的比率（Sr：Ca，Ba：Ca，Mn：Ca和Mg：Ca）的比较。马略卡岛地区2年的研究表明，边缘区域的变化大于核心区域。因此，虽然底栖康吉尔可能显示出区域规模的居住权，但征募不一定来自当地的产卵和幼体滞留。此外，ot-oliths的数据表明，地中海西部和东北大西洋股票的补货来源是分开的。遗传学和耳石化学的结合表明，鳗鱼的种群模型涉及大规模的幼体扩散，尽管在大空间范围内底栖幼体生命阶段的连通性有限，但该物种是否存在一个或多个产卵场仍然不确定。

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  • 来源
    《Marine biology》 |2012年第7期|1509-1525|共17页
  • 作者

    Alberto T. Correia; Ana A. Ramos; Filipe Barros; Goncalo Silva; Paul Hamer; Pedro Morais; Regina L. Cunha; Rita Castilho;

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    Centro Interdisciplinar de Investigacao Marinha e Ambiental, CIIMAR-CIMAR Laboratorio Associado, Rua dos Bragas 289, 4050-123 Porto, Portugal,Faculdade de Ciencias da Saude (FCS), Centro Interdisciplinar de Alteracoes Globais e Bioengenharia (CIAGEB), Universidade Fernando Pessoa (UFP), Rua Carlos Maia, 296, 4200-150 Porto, Portugal;

    CCMAR-CIMAR Laboratorio Associado, Centro de Ciencias do Mar, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal;

    Centro Interdisciplinar de Investigacao Marinha e Ambiental, CIIMAR-CIMAR Laboratorio Associado, Rua dos Bragas 289, 4050-123 Porto, Portugal;

    CCMAR-CIMAR Laboratorio Associado, Centro de Ciencias do Mar, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal;

    Department of Primary Industries, Fisheries Research Branch, P.O. Box 114, 2A Bellarine Highway, Queenscliff, VIC 3225, Australia;

    Centro Interdisciplinar de Investigacao Marinha e Ambiental, CIIMAR-CIMAR Laboratorio Associado, Rua dos Bragas 289, 4050-123 Porto, Portugal,International Centre for Coastal Ecohydrology, Solar do Capitao Mor, EN125 Horta das Figuras, 8000-518 Faro, Portugal;

    CCMAR-CIMAR Laboratorio Associado, Centro de Ciencias do Mar, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal;

    CCMAR-CIMAR Laboratorio Associado, Centro de Ciencias do Mar, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal;

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