长江宜宾江段铜鱼属鱼类种间食物关系

应用生态学报

长江宜宾江段铜鱼属鱼类种间食物关系

李雷²,危起伟^{1,3 **},郭威^1,3,蔺丹清^1,4,吴金明^1

(¹中国水产科学研究院长江水产研究所/农业部淡水生物多样性保护与利用重点开放实验室，武汉 430070； ²中国水产科学研究院黑龙江水产研究所，哈尔滨 150001； ³中国科学院水生生物研究所，武汉 430070； ⁴西南大学生命科学学院，重庆 400715)

出版日期:2015-06-18 发布日期:2015-06-18

Interspecies diet relationship of Coreius from Yinbin reach of Yangtze River, China.

LI Lei², WEI Qi-wei^1,3, GUO Wei^1,3, LIN Dan-qing^1,4, WU Jin-ming^1

(¹Ministry of Agriculture Key Laboratory of Freshwater Biodiversity Conservation, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China; ²Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China; ³Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430070, China; ^4College of Life Science, Southwest University, Chongqing 400715, China)

Online:2015-06-18 Published:2015-06-18

摘要/Abstract

摘要： 采用碳、氮稳定同位素技术对2012年4—5月长江宜宾江段铜鱼和圆口铜鱼的食物组成进行了分析，并利用多元统计分析方法探讨了铜鱼和圆口铜鱼种间食物关系，包括饵料相似性指数、重叠系数及2种鱼的摄食器官形态差异对食物组成的影响.结果表明: 1)铜鱼的δ¹³C和δ¹⁵N
变化范围分别为-21.15‰～-20.31‰和9.67‰～10.21‰，为偏动物性的杂食性鱼类；圆口铜鱼的δ¹³C和δ¹⁵N分别为-23.30‰～-21.18‰和7.40‰～9.21‰，相对铜鱼为偏植物性的杂食性鱼类，铜鱼和圆口铜鱼均与传统肠含物分析的结果存在一定的差异；2)两种鱼的食物相似性指数和食物重叠系数分别为78.7%和55.6%；3)主成分分析(PCA)表明，铜鱼和圆口铜鱼摄食器官形态特征存在一定的差异.长江宜宾江段铜鱼和圆口铜鱼种间竞争不激烈，作为向家坝蓄水前最后一次对长江宜宾江段铜鱼和圆口铜鱼食性及种间食物关系的调查，研究结果可为分析向家坝蓄水对宜宾江段鱼类营养结构的影响提供数据参考.

Abstract: This study investigated the diet compositions of Coreius heterodon and C. guichenoti in Yibin reach of Yangtze River from April to May, 2012 by carbon and nitrogen stable isotopes technique, and analyzed their diet relationship by the multivariate statistical technique, which covered the diet similarity index, overlap coefficient, and the influence of morphological differences in feeding organ between the two species on diet compositions. The results showed that, 1) the δ¹³C and
δ¹⁵N of C. heterodon was from -21.15‰ to -20.31‰ and 9.67‰ to 10.21‰, respectively, which indicated that the fish had an omnivorous possessing carnivorous preference. The δ¹³C and δ¹⁵N of C. guichenoti was from -23.30‰ to -21.18‰ and 7.40‰ to 9.21‰, respectively, which had an omnivorous possessing phytophagous preference. There were some differences in the results between the stable isotopes and the traditional intestinal contents analysis. 2) The diet similarity index and the overlap coefficient was 78.7% and 55.6%, respectively. 3) The principal component analysis (PCA) result showed that the morphological characters of the feeding organs in the two fishes were different. In conclusion, the interspecies competition was not intense between the C. heterodon and C. guichenoti, and as the last investigation of the diet composition and food relationship of the two species before the impoundment of the Xiangjiaba Reservoir, the results could provide reference for analyzing the influence of impoundment on the fish trophic structure in Yibin reach of Yangtze River.

李雷2,危起伟1,3 **,郭威1,3,蔺丹清1,4,吴金明1. 长江宜宾江段铜鱼属鱼类种间食物关系[J]. 应用生态学报.

LI Lei2, WEI Qi-wei1,3, GUO Wei1,3, LIN Dan-qing1,4, WU Jin-ming1. Interspecies diet relationship of Coreius from Yinbin reach of Yangtze River, China.[J]. Chinese Journal of Applied Ecology.