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首页> 外文期刊>Estuarine Coastal and Shelf Science >Short communication Effect of body size and body mass on δ~(13)C and δ~(15)N in coastal fishes and cephalopods
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Short communication Effect of body size and body mass on δ~(13)C and δ~(15)N in coastal fishes and cephalopods

机译：短距离沟通体重和体重对沿海鱼类和头足类动物的δ〜（13）C和δ〜（15）N的影响

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摘要

Carbon and nitrogen isotopes have been widely used in the investigation of trophic relations, energy pathways, trophic levels and migrations, under the assumption that δ~(13)C is independent of body size and that variation in δ~(15)N occurs exclusively due to ontogenetic changes in diet and not body size increase per se. However, several studies have shown that these assumptions are uncertain. Data from food-webs containing an important number of species lack theoretical support on these assumptions because very few species have been tested for δ~(13)C and δ~(15)N variation in captivity. However, if sampling comprises a wide range of body sizes from various species, the variation of δ~(13)C and δ~(15)N with body size can be investigated. While correlation between body size and δ~(13)C and δ~(15)N can be due to ontogenetic diet shifts, stability in such values throughout the size spectrum can be considered an indication that δ~(13)C and δ~(15)N in muscle tissues of such species is independent of body size within that size range, and thus the basic assumptions can be applied in the interpretation of such food webs. The present study investigated the variation in muscle δ~(13)C and δ~(15)N with body size and body mass of coastal fishes and cephalopods. It was concluded that muscle δ~(13)C and δ~(15)N did not vary with body size or mass for all bony fishes with only one exception, the dragonet Callionymus lyra. Muscle δ~(13)C and δ~(15)N also did not vary with body size or mass in cartilaginous fishes and cephalopods, meaning that body size/mass per se have no effect on δ~(13)C or δ~(15)N, for most species analysed and within the size ranges sampled. The assumption that δ~(13)C is independent of body size and that variation in δ~(15)N is not affected by body size increase per se was upheld for most organisms and can be applied to the coastal food web studied taking into account that C lyra is an exception.
机译：碳和氮同位素已被广泛用于营养关系，能量途径，营养水平和迁移的研究，其假设是δ〜（13）C与体型无关，而δ〜（15）N的变化仅会发生由于饮食中的个体发生变化，而不是体重本身增加。但是，一些研究表明这些假设是不确定的。来自包含大量物种的食物网的数据缺乏这些假设的理论支持，因为很少有人对圈养中的δ〜（13）C和δ〜（15）N变化进行过测试。但是，如果采样包括各种物种的较大体型，则可以研究δ〜（13）C和δ〜（15）N随体型的变化。人体大小与δ〜（13）C和δ〜（15）N之间的相关性可能是由于个体遗传饮食的变化引起的，但整个大小范围内此类值的稳定性都可以视为δ〜（13）C和δ〜的指示。 （15）此类物种的肌肉组织中的氮与该大小范围内的体重无关，因此基本假设可用于解释此类食物网。本研究调查了沿海鱼类和头足类动物的肌肉δ〜（13）C和δ〜（15）N随体重和体重的变化。结论是，对于所有骨鱼，肌肉δ〜（13）C和δ〜（15）N均不随体型或质量而变化，只有一种例外，即小龙虾Callionymus lyra。软骨鱼类和头足类动物的肌肉δ〜（13）C和δ〜（15）N也不随体型或质量变化，这意味着体型/质量本身对δ〜（13）C或δ〜没有影响。 （15）N，适用于大多数已分析物种，且在所采样大小范围内。对于大多数生物体而言，δ〜（13）C与体重无关，而δ〜（15）N的变化本身不受体重增加的影响这一假设在大多数生物体中均得到支持，并且可以应用于研究的沿海食物网说明C lyra是个例外。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2011年第1期|p.264-267|共4页
  • 作者

    C. Vinagre; C. Maguas; H.N. Cabral; M.J. Costa;

  • 作者单位

    Universidade de Lisboa, Faculdade de Ciencias, Centra de Oceanografia, Campo Grande, 1749-016 Lisboa, Portugal;

    Universidade de Lisbon Faculdade de Ciencias, Centra de Biologia Ambiental, Campo Grande, 1749-016 Lisboa, Portugal;

    Universidade de Lisboa, Faculdade de Ciencias, Centra de Oceanografia, Campo Grande, 1749-016 Lisboa, Portugal;

    Universidade de Lisboa, Faculdade de Ciencias, Centra de Oceanografia, Campo Grande, 1749-016 Lisboa, Portugal;

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  • 正文语种 eng
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  • 关键词

    isotopes; ontogeny; food webs; coastal zone;

    机译：同位素个体发育食物网;沿海地带;

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