我国几种常见头足类角质颚碳氮稳定同位素分析
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国家自然科学基金(41306127);上海市浦江人才计划项目(18PJ1404100)


Carbon and nitrogen stable isotopes analysis of the common cephalopods beaks in the offshore of China
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我国近海头足类角质颚分类

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    摘要:

    头足类角质颚具有稳定的化学成分和物理结构,其稳定同位素分析已成为头足类生态学研究的主要方法之一。本文分别对4种近海头足类(曼氏无针乌贼、杜氏枪乌贼、短蛸和剑尖枪乌贼)角质颚进行稳定同位素分析,研究角质颚中碳、氮稳定同位素比值(13C/12C,δ13C;15N/14N,δ15N)、摄食生态和栖息环境在物种间的差异,分析可能形成差异的原因以及δ13C、δ15N值与头足类胴长间的相关性,旨在解读不同头足类所生活栖息的渔场,了解它们所处生态系统中的地位,为渔业开发与管理提供材料,同时也为我们可以更好地利用这些物种提供基础。结果表明,4种头足类的平均胴长关系为杜氏枪乌贼 > 剑尖枪乌贼 > 曼氏无针乌贼 > 短蛸(122.72 mm > 67.93 mm > 67.93 mm > 35.3 mm),平均体质量关系为杜氏枪乌贼 > 曼氏无针乌贼 > 短蛸 > 剑尖枪乌贼(70.39 g > 50.67 g > 47.35 g > 19.93 g),其中:曼氏无针乌贼的δ15N值最大(10.81‰±0.38‰),δ13C值最小(-14.98‰±0.55‰),C/N比值最小(3.08±0.03);剑尖枪乌贼的δ15N值最小(8.21‰±0.30‰),δ13C值最大(-13.00‰±0.54‰),C/N比值最大(3.57±0.06)。曼氏无针乌贼可能具有较高营养水平,剑尖枪乌贼、杜氏枪乌贼相较于短蛸、曼氏无针乌贼生活在较浅水域的栖息环境。杜氏枪乌贼与短蛸的δ13C、δ15N值无显著差异(ANOVA,P>0.05),它们的生态位圆存在重叠,处于相近的营养级,其他物种间角质颚的δ13C、δ15N值存在显著差异(ANOVA,P<0.05),生态位圆无重叠。此外杜氏枪乌贼角质颚的δ13C、δ15N值与胴长(ML)均呈显著的线性关系(δ13C=0.023 6×LML-17.429 ,P<0.05;δ15N=0.017 6×LML+6.873,P<0.05),而曼氏无针乌贼、短蛸以及剑尖枪乌贼的胴长与角质颚的δ13C、δ15N值相关性不显著(P>0.05),说明其摄食习性随体长变化无显著相关。

    Abstract:

    The beaks of cephalopods have stable chemical compositions and firm physical structures. Recently, with the increasing use of stable isotope analysis in ecology, it becomes a powerful tool and complement of traditional methods for investigating the trophic ecology and migration patterns of invertebrates. This research was based on 18 Uroteuthis duvauceli specimens, 18 Sepiella maindronis specimens, 20 Octopus ocellatus specimens and 15 Uroteuthis edulis specimens, which were collected in August 2013 from the East China Sea. The beaks of these four kinds of offshore species were studied by determining their carbon stable isotope(13C/12C,δ13C)and nitrogen stable isotope(15N/14N,δ15N).In order to find the differences of these species' habitats and the foraging behaviors, the δ13C and δ15N values were analyzed to see whether there was a correlation with their mantle lengths. The study aimed to explain the habitats of different cephalopods and find their position in the ecological system, not only providing materials for further development and management, but also giving a basis for the better use of these species. The results showed that the average values of mantle length for four species:U.duvauceli > U.edulis > S.maindroni > O.ocellatus(122.72mm > 67.93 mm > 67.93 mm > 35.3 mm). The average values of body weight for four species:U.duvauceli > S.maindroni > O.ocellatus > U.edulis > (70.39 g > 50.67 g > 47.35 g > 19.93 g). S.maindroni have the maximum δ15N value (10.81‰±0.38‰),the minimum δ13C value (-14.98‰±0.55‰),the minimum C/N(3.08±0.03)and U.edulishave the minimum δ15N value (8.21‰±0.30‰), the maximum δ13C value(-13.00‰±0.54‰), the maximum C/N(3.57±0.06), U.duvauceli and U.edulislive in the shallower water area than the S.maindroni and O.ocellatus. And the δ13C and δ15N values between U.duvauceli and O.ocellatus were very similar (ANOVA, P>0.05), their ecological niches were much overlapped, they may have the similar trophic level. The δ13C and δ15N values of other kinds of species had significant differences (ANOVA, P<0.05). In addition, the δ13C values of U.duvauceli and the mantle length (ML) showed a significant liner relationship (δ13C=0.023 6×LML- 17.429,P<0.05), δ15N values also showed a significant liner relationship with the mantle length (ML) (δ15N=0.017 6×LML+ 6.873,P<0.05), but there was no significant correlation between carbon and nitrogen stable isotopes with the mantle length in S.maindroni, O.ocellatus and U.edulis (P>0.05).It showed that there was no significant connection between feeding habit and mantle length.

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林静远,刘必林,桓梦瑶,刘娜,欧利国.我国几种常见头足类角质颚碳氮稳定同位素分析[J].上海海洋大学学报,2019,28(3):394-401.
LIN Jingyuan, LIU Bilin, HUAN Mengyao, LIU Na, OU Liguo. Carbon and nitrogen stable isotopes analysis of the common cephalopods beaks in the offshore of China[J]. Journal of Shanghai Ocean University,2019,28(3):394-401.

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  • 收稿日期:2017-12-08
  • 最后修改日期:2018-11-13
  • 录用日期:2018-11-13
  • 在线发布日期: 2019-05-30
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