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乌苏里江哲罗鲑的年龄结构、性比和生长

尹家胜;徐伟;曹顶臣;姜作发;匡友谊;李永发

  We report the current status of Taimen(Hucho taimen)population in Wusuli River of China. The amount of catch per year was only1 800-5 400individuals ranging from 2-15 years old during 1998-2002. Of all the captured, individuals with sexual maturity were up to 30%-70% (female maturity at 5 years old and male 6 years old). Sex ratio varied greatly among different localities. Its breeding population mainly consisted of males aged 5-10 years and females aged 8-13 years old, which spawned in May each year.Females breed once with about4 000-23 000eggs produced every 2-3 years. Taimen grows fast and average growth rate is about 10 cm per year prior to 10 years s old, which corresponded with von Bertelanffy s equation calculated asLt=24641[1-e-00407(t-04625)] andWt=174 07572[1-e-00407(t-04622)]29537, and the relationship between body length and weight wasW=0015018Lu2020.……   
[关键词]:哲罗鲑;年龄结构;性比;生长
[文献类型]:期刊
[文献出处]: 《动物学报2003年05期
[格式]:PDF原版; EPUB自适应版(需下载客户端)