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首页> 外文期刊>Marine biology >Feeding on intertidal microbial mats by postlarval tiger shrimp, Penaeus semisulcatus De Haan
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Feeding on intertidal microbial mats by postlarval tiger shrimp, Penaeus semisulcatus De Haan

机译：以虾后对虾Penaeus semisulcatus De Haan为食的潮间微生物垫

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摘要

A series of experiments investigated the potential role of microbial mats in nutrition of the early settlement stages of Penaeus semisulcatus. From 3 days post-metamorphosis, the microbial mat supported high growth and survival rates in postlarvae, equivalent to that supported by a control diet of Artemia nauplii and mussel. Examination of gut contents indicated that benthic postlarvae feed indiscriminately on the microbial mat. However, when postlarvae were fed separated size-fractions of the microbial mat, only the fraction containing a high concentration of infauna (mainly nematodes) was able to support the same growth as intact microbial mat. This appears to be due to the low nitrogen content (0.4-0.9 mmol g~(-1)) of the various size-fractions, compared to that of infauna (4.0 mmol g~(-1)). The stable isotope composition of the dietary size-fractions and postlarval shrimp tissue supports the hypothesis that the shrimp assimilated C and N primarily from the associated infauna. This may be due to selective feeding that is not apparent from stomach contents, due to rapid digestion of fauna soft tissues, or to differential assimilation of infaunal prey relative to other microbial mat components. The results demonstrate that microbial mats may support survival andrngrowth in early-stage penaeid shrimp postlarvae on intertidal mud flats.
机译：一系列实验研究了微生物垫在半硫化对虾早期沉降阶段的营养中的潜在作用。从变态后的3天开始，微生物垫可支持幼虫的高生长和存活率，这与节食无节幼体和贻贝的对照饮食所支持的相当。检查肠内容物表明底栖幼体在微生物垫上不加选择地进食。然而，当给幼虫喂食分离的微生物垫的大小级分时，只有包含高浓度的infauna（主要是线虫）的级分能够支持与完整微生物垫相同的生长。这似乎是由于各种大小部分的氮含量较低（0.4-0.9 mmol g〜（-1）），而臭豆的氮含量仅为4.0 mmol g〜（-1）。日粮大小级分和虾后虾组织的稳定同位素组成支持以下假设：虾主要从相关的动物体内吸收了碳和氮。这可能是由于选择性喂养而导致的，从胃内容物中看不到选择性喂养，这是由于动物软组织的快速消化，或者是由于相对于其他微生物垫成分而言，臭名昭著的猎物的同化作用。结果表明，微生物垫可以支持潮间带泥滩上早期对虾虾幼体的生存和生长。

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  • 来源
    《Marine biology》 |2009年第10期|2001-2009|共9页
  • 作者

    I. Al-Maslamani; L. Le Vay; H. Kennedy;

  • 作者单位

    Environmental Studies Centre, Qatar University, Doha, Qatar;

    School of Ocean Sciences, College of Natural Scienc Bangor University, Menai Bridge, Anglesey, Wales LL59 5EY, UK;

    School of Ocean Sciences, College of Natural Scienc Bangor University, Menai Bridge, Anglesey, Wales LL59 5EY, UK;

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