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首页> 外文期刊>Marine biology >Size-dependent change in body shape and its possible ecological role in the Patagonian squid (Doryteuthis gahi) in the Southwest Atlantic
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Size-dependent change in body shape and its possible ecological role in the Patagonian squid (Doryteuthis gahi) in the Southwest Atlantic

机译：身体形状的大小依赖性变化及其在西南大西洋的巴塔哥尼亚鱿鱼（Doryteuteutis Gahi）中可能的生态作用

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摘要

Cephalopods are a versatile group with several mechanisms in place to ensure the success of future generations. The Patagonian long-finned squid (Doryteuthis gahi) populations on the southern Patagonian shelf are believed to be genetically homogenous, but the mechanisms connecting them geographically and temporally are unresolved. Individual growth is highly variable within cephalopod populations and is likely to affect individual patterns of migration and, thus, population connectivity as a whole. Therefore, this study aimed to make inferences about population structure by analysing the size at which individuals were mature and aimed to describe the intrapopulation growth (allometric) trajectories of body shape, using landmark-based geometric morphometric techniques to describe phenotypes. Samples were collected from June 1999 to November 2017 around 52 degrees S and 58 degrees W. Smoothing curves from binomial generalised additive models (GAMs) suggested two size modes of maturity in females and one or multiple modes in males dependent on year and season. There was a gradual elongation of the mantle and an increase in the relative fin size throughout ontogeny. Shape scores from geometric morphometric shape coordinates revealed a continuous non-linear allometric trajectory with a significantly different slope angle for males exceeding 20.1 cm dorsal mantle length (DML). At the extreme of this continuum, the largest 'super-bull' form had a substantially more elongated body shape, a heavier fin and a larger fin area compared to the rest of the population, a body shape associated with enhanced swimming performance which may help to maintain population connectivity. The prevalence of these rare super-bulls in the fishery varied widely between years, suggestive of phenotypic plasticity. This study provides evidence that the D. gahi population on the southern Patagonian shelf has a complex population structure with high intraspecific variation.
机译：头部是一种多功能组，具有几种机制，以确保后代的成功。南巴巴面架的巴塔哥尼亚人长鳍鱿鱼（Doryteuthis Gahi）群体被认为是遗传均匀的，但是在地理上和时间上连接它们的机制是未解决的。个人成长在Cephalopod群体中具有很大的变化，并且可能影响迁移的个体模式，因此，整个人口连接。因此，本研究旨在通过分析个体成熟的大小并旨在描述身体形状的内部生长（同种异数）轨迹的尺寸来对人口结构进行推论，使用基于地标的几何形态学技术来描述表型。从1999年6月至2017年11月收集了样品，大约52℃和58°W.来自二项式广义添加剂模型的平滑曲线（Gams）建议女性中的两种成熟模式和依赖于年份的男性中的一种或多种模式。在整个综合组织中逐渐伸长锯齿和相对翅片尺寸的增加。几何形态形状形状坐标的形状分数揭示了连续的非线性等因素轨迹，对于超过20.1cm背部地幔长度（DML）的雄性具有显着不同的斜角。在这一连续之外，最大的“超级公牛”形式的形状大大细长的身体形状，较重的翅片和较大的翅片区域与其他人的群体相比，一种与增强的游泳表现相关的体形，这可能有所帮助保持人口连通性。在渔业中这些罕见的超级公牛的普遍性在多年之间变化，表达了表型可塑性。本研究提供了证据表明，南塔哥代架上的D. Gahi人口具有复杂的人口结构，具有高的内部内部变化。

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  • 来源
    《Marine biology》 |2019年第5期|54.1-54.17|共17页
  • 作者

    Jones Jessica B.; Pierce Graham J.; Saborido-Rey Fran; Brickle Paul; Kuepper Frithjof C.; Shcherbich Zhanna N.; Arkhipkin Alexander I.;

  • 作者单位

    Univ Aberdeen Sch Biol Sci Zool Bldg Tillydrone Ave Aberdeen AB24 2TZ Scotland|Falkland Islands Fisheries Dept Stanley FIQQ 1ZZ Falkland Island|South Atlantic Environm Res Inst Stanley FIQQ 1ZZ Falkland Island;

    Univ Aberdeen Sch Biol Sci Zool Bldg Tillydrone Ave Aberdeen AB24 2TZ Scotland|Univ Aveiro CESAM P-3810193 Aveiro Portugal|Univ Aveiro Dept Biol P-3810193 Aveiro Portugal|CSIC Inst Invest Marinas Eduardo Cabello 6 Vigo 36208 Spain;

    CSIC Inst Invest Marinas Eduardo Cabello 6 Vigo 36208 Spain;

    Univ Aberdeen Sch Biol Sci Zool Bldg Tillydrone Ave Aberdeen AB24 2TZ Scotland|South Atlantic Environm Res Inst Stanley FIQQ 1ZZ Falkland Island;

    Univ Aberdeen Sch Biol Sci Zool Bldg Tillydrone Ave Aberdeen AB24 2TZ Scotland;

    Falkland Islands Fisheries Dept Stanley FIQQ 1ZZ Falkland Island;

    Univ Aberdeen Sch Biol Sci Zool Bldg Tillydrone Ave Aberdeen AB24 2TZ Scotland|Falkland Islands Fisheries Dept Stanley FIQQ 1ZZ Falkland Island;

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