生态学杂志2013，Vol.32Issue(4)：905-911,7.
长江上游圆筒吻鮈生长与食性
Growth and feeding habits of Rhinogobio cylindricus Günther in the upper reaches of Yangtze River
摘要
Abstract
A total of 547 specimens of Rhinogobio cylindricus were monthly collected from the upper reaches of Yangtze River from July 2010 to July 2012. By using otolith as identification material , the age structure and growth characteristics of the specimens were studied, and the feeding habits of the specimens were analyzed by their intestinal inclusions. As a material for identification , the otolith was better than the others, and the success rate was 93.7 %. The R. cylindricu population consisted of 7 age classes, mainly between 2-4 years old (79. 89% ). The relationships between body weight and length and between body length and otolith radius could be expressed as W=8×l0-6L2.977(r2 =0.955, P<0.01) and L = 8×l0-4 R1.149(r2=0.945, P<0.01), respectively, and the Von Bertalanffy growth equation was Lt =389. 37( 1-e-0.177(t+0.739) and Wt = 515.26(1-e-0.177(t0.739))2.977. The age inflection point of body weight was estimated at 5.44 years. Diet habit analysis showed that R. cylindricus preyed all the year, with the main foods being algae, mollusks, and aquatic insects. In terms of numerical percentage, the majority of the foods were algae and mollusks (93. 12% ); in terms of weight percentage, the majorities were al- gae, mollusks and aquatic insects (78. 38% ). According to the results of this study, R. cylindricus was an omnivorous fish species. As compared with previous studies, the R. cylindricus had individually miniaturized, but its body weight changed little. Some suggestions for fishery resources protection were proposed to cope with the over exploitation of the R. cylindricus.关键词
圆筒吻鮈/年龄结构/生长特性/食性Key words
Rhinogobio cylindricus Gunther/ age structure/ growth characteristics/ feeding habit分类
生物科学引用本文复制引用
熊星,李英文,田辉伍,贾向阳,段辛斌,刘绍平,陈大庆..长江上游圆筒吻鮈生长与食性[J].生态学杂志,2013,32(4):905-911,7.基金项目
中国长江三峡集团公司项目(0799527)、公益性行业(农业)科研专项(200903048)和国家自然科学基金项目(51249004)资助. （0799527）
