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葛洲坝截流24年来中华鲟产卵群体结构的变化
Authors
危起伟,陈细华,杨德国,刘鉴毅,朱永久,郑卫东
Publication date
1 January 2005
Publisher
Abstract
以1981~2004年间捕获的中华鲟(AcipensersinensisGray)亲鲟样本为研究材料,研究葛洲坝截流24年来中华鲟繁殖季节中坝下30km范围内产卵群体结构的变化情况。测定与统计结果显示,中华鲟雌雄性比由1981~1983年的1.10∶1降低到1987~1989年的0.63∶1,而后上升到2003~2004年的5.86∶1。雌鲟平均体长由1990~1992年的263.1cm增加到1999~2001年的276.7cm,升幅为5.2%(差异极显著);平均体重由1990~1992年的202.4k
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Institute of Hydrobiology, Chinese Academy Of Sciences
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oai:ir.ihb.ac.cn:152342/1492
Last time updated on 15/03/2018