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Influence of sexual dimorphism on stable isotopes and trace element concentrations in the greater hooked squid Moroteuthopsis ingens from New Zealand waters

机译:新西兰水域大钩状鱿鱼Morodechopsis Ingens稳定同位素对稳定同位素和微量元素浓度的影响

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摘要

The Chatham Rise, one of the highest offshore-primary production regions in New Zealand waters, hosts a great abundance and diversity of deep-sea cephalopods including the greater hooked squid, Moroteuthopsis ingens. Stable isotope ratios of carbon (delta C-13) and nitrogen (delta N-15) and trace element concentrations (Ag, As, Cd, Co, Cr, Cu, Fe, Hg, Ni, Pb, Se, V, and Zn) were assessed in female and male specimens of different size classes (89-563 mm mantle length). Values of delta C-13 and delta N-15 were overall higher in females and delta C-13 was further influenced by size and sex. Both muscular mantle (the largest fraction of the total body mass) and digestive gland (the known main storage organ for Ag, Cd, Cu and Zn in many cephalopods) tissues were analysed. Higher levels of Cd were observed in males than in females. A positive effect was found between size and Hg concentrations, which could be related to the ontogenetic descent of larger specimens into deeper waters, where they are exposed to higher Hg concentrations, and/or dietary shifts toward Hg-enriched prey with increasing size. This study provides trace element data for this abundant and ecologically important species, and further reveals higher trace element concentrations (especially Hg) in M. ingens from the Chatham Rise, compared to specimens from the sub-Antarctic zone.
机译:Chatham崛起是新西兰水域中最高的海上初级生产区之一,举办了深海头部头皮op的丰富和多样性,包括较大的钩状鱿鱼,Morodechopsis Ingens。碳(Delta C-13)和氮(Delta N-15)和痕量元素浓度(Ag,As,Cd,Co,Cr,Cu,Fe,Hg,Ni,Pb,Se,V和Zn的稳定同位素比)在不同尺寸等级的雌性和雄性标本(89-563 mm披风长度)中评估。 Delta C-13和Delta N-15的值在雌性方面较高,Delta C-13进一步受大小和性别的影响。分析了肌肉外壳(总体质量的最大部分)和消化腺(在许多头部oppods的Ag,Cd,Cu和Zn中已知的主储存器官)组织。在男性中观察到更高水平的Cd比女性在雌性中观察到。在大小和Hg浓度之间发现了阳性效果,其与较大样品的鞘翅目性有关,进入更深的水域,其中它们暴露于较高的Hg浓度,和/或饮食转向富含Hg的牺牲猎物,随着较大的尺寸。该研究为这种丰富和生态的重要物种提供了微量元素数据,并进一步揭示了与来自亚南极区的标本相比从CHATHAM升起的米色伊斯兰郡的痕量元素浓度(特别是Hg)。

著录项

  • 来源
    《Marine Environmental Research》 |2020年第7期|104976.1-104976.9|共9页
  • 作者单位

    Auckland Univ Technol Sch Sci AUT Lab Cephalopod Ecol & Systemat Private Bag 92006 Auckland 1142 New Zealand;

    Auckland Univ Technol Sch Sci AUT Lab Cephalopod Ecol & Systemat Private Bag 92006 Auckland 1142 New Zealand;

    La Rochelle Univ Ctr Etud Biol Chize CEBC UMR 7372 CNRS F-79360 Villiers En Bois France;

    Auckland Univ Technol Sch Sci AUT Lab Cephalopod Ecol & Systemat Private Bag 92006 Auckland 1142 New Zealand;

    La Rochelle Univ UMR 7266 Littoral Environm & Soc LIENSs CNRS 2 Rue Olympe Gouges F-17000 La Rochelle France;

    La Rochelle Univ UMR 7266 Littoral Environm & Soc LIENSs CNRS 2 Rue Olympe Gouges F-17000 La Rochelle France|Inst Univ France IUF 1 Rue Descartes F-75005 Paris France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cephalopods; Biomonitoring; Bioaccumulation; Metals; Onychoteuthidae;

    机译:Cephalopods;生物监测;生物累积;金属;onychotechidae;

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