Decreased trophic position as a function of increasing body size of a benthic omnivorous fish from the largest freshwater lake in China
文献类型：SCI/SSCI论文
| 作者 | Xu J. |
| 发表日期 | 2011 |
| 关键词 | Stable isotopes Feeding ecology Mixing model Lake Poyang Pelteobagrus vachelli (Richardson 1846) pelagic food webs stable-isotope analysis nitrogen carbon community models ratios poyang shifts diet |
| 英文摘要 | Potential body size-trophic position relationships of the Darkbarbel catfish Pelteobagrus vachelli (Richardson 1846) were examined using stable isotope analysis. Pelteobagrus vachelli is a benthic feeding fish from Lake Poyang, the largest freshwater lake in China. Two-source mixing model with mussel (Corbicula fluminea) and snail (Bellamya aeruginosa) as baseline primary consumers of planktonic and benthic food webs, respectively, was used to estimate contribution of carbon derived from planktonic vs. benthic food web. Results showed that as an indicator of trophic position, delta(15)N was negatively correlated with the body length and weight of the fish; on the other hand, as an indicator of the end-member food sources, delta(13)C was not correlated with fish size. The mixing model results showed that the averaged trophic position of our sampled 3.3-12.7 cm Pelteobagrus vachelli was 3.1 +/- 0.2 and derived 68 +/- 27% of their food from the benthic food web, confirming that the feeding behavior of the catfish favors benthic food sources. |
| 出处 | Environmental Biology of Fishes |
| 卷 | 91 |
| 期 | 4 |
| 页 | 505-512 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0378-1909 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22829]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Xu J.. Decreased trophic position as a function of increasing body size of a benthic omnivorous fish from the largest freshwater lake in China. 2011. |
入库方式： OAI收割
来源：地理科学与资源研究所
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