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首页> 外文期刊>ICES Journal of Marine Science >Population structure of the European anchovy, Engraulis encrasicolus, in the SW Mediterranean Sea, and the Atlantic Ocean: evidence from otolith shape analysis
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Population structure of the European anchovy, Engraulis encrasicolus, in the SW Mediterranean Sea, and the Atlantic Ocean: evidence from otolith shape analysis

机译：欧洲西南Mediterranean鱼和大西洋中的欧洲En鱼Engraulis encrasicolus的种群结构：耳石形状分析的证据

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摘要

Understanding the influence of oceanographic features on the structure offish population is of basic importance to population dynamics studies and fisheries management. The European anchovy (Engraulis encrasicolus) exhibits a complex population structure which has produced conflicting results in previous genetic studies. This study examines the variability in the shape of the anchovy's otolith as a tool for identifying different stocks, and investigates the effects of oceanographic features on population structure. Anchovies were analysed from seven locations in the SW Mediterranean Sea and Atlantic Ocean along the northwestern African (Morocco) and Portuguese (Bay of Cadiz) coasts. A combination of otolith shape indices and elliptic Fourier descriptors were investigated by multivariate statistical procedures. Within the studied area, three distinct anchovy stocks were identified: the Algero-Provencal Basin, the southern Alboran Sea, and the Atlantic Ocean (Morocco and Gulf of Cadiz). The separation of the stocks was based on non-parametric discriminant analysis returning a classification percentage. Over 81% of the separation of the stocks could be explained by oceanographic features. Shape variability of anchovy otoliths was associated with the presence of the Almeria-Oran front, and the strait of Gibraltar. The Alboran stock was distinct from the Algero-Provencal Basin and from the closest Atlantic stocks (Gulf of Cadiz or Atlantic coast of Morocco). Results are discussed and compared with those previously obtained by genetic studies. This study supports the efficiency of otolith shape analysis for the stock identification of anchovy, and highlights the role of oceanographic features in stock separation.
机译：了解海洋学特征对鱼类种群结构的影响对种群动态研究和渔业管理至关重要。欧洲an鱼（Engraulis encrasicolus）显示出复杂的种群结构，这在先前的遗传研究中产生了矛盾的结果。这项研究检查了cho鱼耳石形状的变异性，以此作为识别不同种群的工具，并研究了海洋学特征对种群结构的影响。在西南非洲（摩洛哥）和葡萄牙（加的斯湾）海岸的西南地中海和大西洋的七个地点对凤尾鱼进行了分析。通过多元统计程序研究了耳石形状指数和椭圆傅立叶描述子的组合。在研究区域内，确定了三种不同的cho鱼种群：阿尔及利亚-普罗旺斯盆地，南部的阿尔伯兰海和大西洋（摩洛哥和加的斯湾）。股票的分类基于返回分类百分比的非参数判别分析。海洋特征可以解释超过81％的种群分离。 an鱼耳石的形状变异性与阿尔梅里亚-奥兰锋和直布罗陀海峡的存在有关。 Alboran种群不同于Algero-Provencal盆地和最接近的大西洋种群（加的斯湾或摩洛哥的大西洋海岸）。对结果进行了讨论，并与以前通过遗传研究获得的结果进行了比较。这项研究支持耳石形状分析对of鱼种群识别的效率，并强调了海洋特征在种群分离中的作用。

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  • 来源
    《ICES Journal of Marine Science》 |2014年第9期|2429-2435|共7页
  • 作者

    Mahmoud Bacha; Sherif Jemaa; Azzedine Hamitouche; Khalef Rabhi; Rachid Amara;

  • 作者单位

    Laboratoire d'Oceanologie et de Geosciences, UMR 8787 CNRS, Universite du Littoral Cote d'Opale, 32 Avenue Foch, 62930 Wimereux, France;

    Laboratoire d'Oceanologie et de Geosciences, UMR 8787 CNRS, Universite du Littoral Cote d'Opale, 32 Avenue Foch, 62930 Wimereux, France,Conseil National des Recherches Scientifiques, Centre National des Sciences Marines, BP 534 Batroun, Liban;

    Laboratoire d'Oceanologie et de Geosciences, UMR 8787 CNRS, Universite du Littoral Cote d'Opale, 32 Avenue Foch, 62930 Wimereux, France;

    Laboratoire d'Oceanologie et de Geosciences, UMR 8787 CNRS, Universite du Littoral Cote d'Opale, 32 Avenue Foch, 62930 Wimereux, France;

    Laboratoire d'Oceanologie et de Geosciences, UMR 8787 CNRS, Universite du Littoral Cote d'Opale, 32 Avenue Foch, 62930 Wimereux, France;

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  • 正文语种 eng
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  • 关键词

    Almeria-Oran front; anchovy; Atlantic; Mediterranean; otolith; shape analysis; stock identification;

    机译：阿尔梅里亚-奥兰战线;cho鱼大西洋;地中海;耳石形状分析;库存识别;

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