金沙江上游软刺裸裂尻鱼年龄和生长的研究  

Age and Growth of Schizopygopsis malacanthus Herzenstein in the Upper Reaches of the Chin-sha River

作　　者：胡睿[1,2,3] 王剑伟[1,2] 谭德清[1,2] 苗志国[1,2] 但胜国[1,2] 

机构地区：[1]中国科学院水生生物研究所,武汉430072 [2]中国科学院水生生物多样性与保护重点实验室,武汉430072 [3]中国科学院研究生院,北京100049

出　　处：《四川动物》2012年第5期708-712,719,F0003,共7页Sichuan Journal of Zoology

基　　金：中国水电顾问集团成都勘测设计研究院资助

摘　　要：以2011年4～5月和2011年9～10月期间采集于金沙江上游的328尾软刺裸裂尻鱼Schizopygopsis malacanthus Herzenstein为材料,用微耳石鉴定年轮,对其年龄和生长进行研究,以期为进一步的鱼类生态学研究和资源保护提供依据。结果表明,微耳石上宽而暗的增长带与窄而透明的增长带交替出现,窄带与宽带交界处为年轮;体长与体重呈幂函数关系:W=0.00002L2.970;von Bertalanffy方程为:Lt=382.1067×(1-e-0.1058(t+0.1045)),Wt=949.0577×(1-e-0.1058(t+0.1045))2.970;体重生长拐点年龄为10.2龄,对应的体长和体重分别为253.4mm、280.4g。软刺裸裂尻鱼是裂腹鱼类中生长较慢、体型较小的种类,是对金沙江上游生态与环境适应的结果。Schizopygopsis malacanthus Herzenstein is a cold water fish endemic to the Tibetan Plateau, which distributes widely in the Chin-sha River and the Ya-lung River. In this study, age and growth of S. malacanthuz in the upper reaches of the Chin-sha River were studied to provide useful information for further ecological research and resources conservation. Samples were collected from April to May and September to October in 2011. A total of 328 specimens were measured, and then annuli on lapillus were used for aging fish. The result showed that wide opaque zones and narrow translucent zones ap- peared alternately in otolith, while the junctions between translucent zones and opaque zones were annulus. The regressed e- quation between body weight （W） and body length （L） was W = 0. 00002L^2.970. Growth model could be described by yon Bertalanffy equation ： L, = 382. 1067 × （ 1 - e^ -0. 1058（t＋0. 1045） ） and W, = 949. 0577 × （ 1 - e^-0 .1058（t＋0 .1045） ） 2.970. Growth in- flexion occurred at 10.2 years, when body length and body weight were 253.4 mm and 280.4 g, respectively. Comparing with other Schizothoracinae fishes, S. malacanthus is a slow growing, small-sized species, which may be the result of adap- tion for the ecological and environmental factors in the upper Chin-sha River.

关 键 词：软刺裸裂尻鱼 金沙江 年龄 生长 耳石 

分 类 号：S931.1[农业科学—渔业资源]