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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
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
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DOI:
作者单位:(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)
中文关键字:软刺裸裂尻鱼;金沙江;年龄;生长;耳石
英文关键字:Schizopygopsis malacanthus Herzenstein; Chin-sha River; age; growth; otolith
中文摘要:

20114~5月和20119~10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= 0.00002L2.970von 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 253.4 mm280.4 g。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。

英文摘要:

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. malacanthus 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 appeared alternately in otolith, while the junctions between translucent zones and opaque zones were annulus. The regressed equation between body weight (W) and body length (L) was W= 0.00002L2.970. Growth model could be described by von Bertalanffy equation: Lt=382.1067×(1-e-0.1058(t+0.1045)) and Wt=949.0577×(1-e-0.1058(t+0.1045))2.970. Growth inflexion 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 adaption for the ecological and environmental factors in the upper Chin-sha River.

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国内统一连续出版物号:51-1193/Q |国际标准出版物号:1000-7083
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