Trophic ecology of sharks in the mid-east Pacific ocean inferred from stable isotopes
Trophic ecology of sharks in the mid-east Pacific ocean inferred from stable isotopes
复制标题
从稳定同位素推断中东太平洋鲨鱼的营养生态
DOI：
10.1007/s11802-014-2071-1
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发表时间：
2014-04
影响因子：
1.6
通讯作者：
Zhu Jiangfeng
中科院分区：
文献类型：
--
作者：
Gong Yi;Chen Xinjun;Dai Xiaojie;Zhu Jiangfeng
鲨鱼是海洋生态系统中的顶级掠食者，具有重要的生态和保护意义。本研究利用碳氮稳定同位素比值对中国延绳钓船队在中东太平洋捕捞的5种代表性鲨鱼进行了营养位置估算，大青鲨（Prionace glauca）、大眼长尾鲨（Alopias superciliosus）、丝鲨（Carcharhinus falciformis）、双髻鲨（Sphyrna lewini）和大洋白鳍鲨（Carcharhinus longimanus）。其中，白鳍鲨的营养级和δ 15 N值最低（3.9和14.93‰ ± 0.84‰），大眼长尾鲨的营养级和δ 15 N值最高（4.5和17.02‰ ± 1.21‰）。大眼长尾鲨的δ 15 N值显著高于其他鲨鱼，表明其营养地位较高。大青鲨和大洋白鳍鲨的δ 13 C值明显高于大眼长尾鲨、丝鲨和双髻鲨，可能是由于不同的饮食和/或生活生境。稳定同位素数据和胃内容物数据高度一致，表明稳定同位素分析补充了传统的鲨鱼摄食生态学研究，从而有助于了解鲨鱼的营养联系。
As apex predators, sharks are of ecological and conservation importance in marine ecosystems. In this study, trophic positions of sharks were estimated using stable isotope ratios of carbon and nitrogen for five representative species caught by the Chinese longline fleet in the mid-east Pacific,i.e., the blue shark (Prionace glauca), the bigeye thresher shark (Alopias superciliosus), the silky shark (Carcharhinus falciformis), the scalloped hammerhead (Sphyrna lewini), and the oceanic whitetip shark (Carcharhinus longimanus). Of these species, oceanic whitetip shark has the lowest trophic level and mean δ15N value (3.9 and 14.93‰ ± 0.84‰), whereas bigeye thresher shark has the highest level/values (4.5 and 17.02‰ ± 1.21‰, respectively). The bigeye thresher shark has significantly higher δ15N value than other shark species, indicating its higher trophic position. The blue shark and oceanic whitetip shark has significantly higher δ13C values than bigeye thresher shark, silky shark and scalloped hammerhead, possibly due to different diets and/or living habitats. The stable isotope data and stomach content data are highly consistent, suggesting that stable isotope analysis supplements traditional feeding ecology study of sharks, and thus contributes to understanding their trophic linkage.
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影响因子：
2
作者：
J. Reum
通讯作者：
J. Reum
影响因子：
2.7
作者：
Cherel, Y;Hobson, KA;Weimerskirch, H
通讯作者：
Weimerskirch, H
影响因子：
6.1
作者：
J. Newton
通讯作者：
J. Newton
影响因子：
2.5
作者：
MacNeill, MA;Skomal, GB;Fisk, AT
通讯作者：
Fisk, AT
影响因子：
4.8
作者：
G. Rau;A. Mearns;D. R. Young;R. Olson;H. A. Schafer;I. R. Kaplan
通讯作者：
G. Rau;A. Mearns;D. R. Young;R. Olson;H. A. Schafer;I. R. Kaplan