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首页> 外文期刊>Marine ecology progress series >Benthic enrichment by diatom-sourced lipid promotes growth and condition in juvenile Tanner crabs around Kodiak Island, Alaska
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Benthic enrichment by diatom-sourced lipid promotes growth and condition in juvenile Tanner crabs around Kodiak Island, Alaska

机译：通过硅藻来源的脂质进行的底栖生物富集促进了阿拉斯加科迪亚克岛附近幼仔丹纳蟹的生长和状况

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摘要

Nearshore embayments are important nurseries for juvenile southern Tanner crabs Chionoecetes bairdi, as they provide refuge from predation and elevated water temperatures promote rapid growth. Previous investigations of juvenile Tanner crabs have shown considerable variability in size of age-0 yr crabs from different shallow water embayments surrounding Kodiak, Alaska. To determine the proportion of this presumed growth variability that is due to diet quality, we sampled crabs and sediments over 2 yr at nursery sites that had previously demonstrated disparate age-0 yr crab sizes. Juvenile crabs reside at the sediment-water interface and therefore we measured sedimentary grain size and sedimentary organic matter, as well as total lipids per weight, lipid classes and fatty acid biomarkers in both crabs and sediments. Juvenile crabs from sheltered sites, as opposed to exposed sites, were characterized by larger size and by rapid growth rates and higher tissue lipid densities. Further, higher diatom and bacterial fatty acid markers characterized both sedimentary lipids and crab lipids in animals from sheltered bays compared to those from exposed sites. Controlled laboratory experiments were run to determine the relative importance of food quantity (ration) and quality (% lipid) on juvenile growth and condition. We found both diet quantity and quality significantly affected growth and lipid storage of juvenile crabs. Our results point to the importance of trophic factors in defining high quality habitat for a commercially important cold-water crab species.
机译：对于南部丹纳蟹幼体Chionoecetes bairdi而言，近岸浮标是重要的育苗场，因为它们为捕食提供了庇护，而升高的水温促进了其快速生长。先前对青少年Tanner螃蟹的调查显示，来自阿拉斯加Kodiak周围不同浅水区的0岁0岁螃蟹的大小存在很大差异。为了确定这种由于饮食质量而导致的生长变异的比例，我们在苗圃场所对2年以上的螃蟹和沉积物进行了采样，这些地方以前已经证明了0岁以上的螃蟹大小不同。幼蟹生活在沉积物-水界面，因此我们测量了沉积物粒度和沉积有机物，以及蟹和沉积物中的每单位重量的总脂质，脂质类别和脂肪酸生物标志物。来自庇护所地点而不是裸露地点的幼蟹的特征是更大的尺寸，快速的生长速率和更高的组织脂质密度。此外，与来自裸露部位的动物相比，来自庇护海湾的动物中较高的硅藻和细菌脂肪酸标记物表征了沉积脂质和螃蟹脂质。进行了受控的实验室实验，以确定食物量（定量）和质量（脂质％）对青少年生长和状况的相对重要性。我们发现饮食数量和质量均显着影响幼蟹的生长和脂质储藏。我们的结果表明，营养因素对于定义重要的冷水蟹物种的高质量栖息地至关重要。

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  • 来源
    《Marine ecology progress series》 |2018年第11期|161-178|共18页
  • 作者

    Copeman Louise; Ryer Clifford; Spencer Mara; Ottmar Michele; Iseri Paul; Sremba Angie; Wells Jeanette; Parrish Christopher;

  • 作者单位

    Oregon State Univ, Coll Earth Ocean & Atmospher Sci, 2030 Marine Sci Dr, Newport, OR 97365 USA;

    NOAA, Alaska Fisheries Sci Ctr, Resource Conservat & Engn Div, Fisheries Behav Ecol Program, 2030 Marine Sci Dr, Newport, OR 97365 USA;

    NOAA, Alaska Fisheries Sci Ctr, Resource Conservat & Engn Div, Fisheries Behav Ecol Program, 2030 Marine Sci Dr, Newport, OR 97365 USA;

    NOAA, Alaska Fisheries Sci Ctr, Resource Conservat & Engn Div, Fisheries Behav Ecol Program, 2030 Marine Sci Dr, Newport, OR 97365 USA;

    NOAA, Alaska Fisheries Sci Ctr, Resource Conservat & Engn Div, Fisheries Behav Ecol Program, 2030 Marine Sci Dr, Newport, OR 97365 USA;

    Oregon State Univ, Cooperat Inst Marine Resources Studies, 2030 Marine Sci Dr, Newport, OR 97365 USA;

    Mem Univ, Dept Ocean Sci, St John, NF A1C 5S7, Canada;

    Mem Univ, Dept Ocean Sci, St John, NF A1C 5S7, Canada;

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  • 正文语种 eng
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  • 关键词

    Juvenile Tanner crab; Lipids; Fatty acids; Nursery; Food quality;

    机译：少年制革蟹;脂质;脂肪酸;苗圃;食品质量;

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