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引用本文:王成辉,李思发,李晨虹,赵金良.池塘放养中华绒螯蟹长江种群与辽河种群性早熟出现差异的观察与分析.湖泊科学,2001,13(1):57-62. DOI:10.18307/20010109
WANG Chenghui,LI Sifa,LI Chenhong,ZHAO Jinliang.Observation and Analysis on Appearing Difference of Precocious Crab of Yangtze Population and Liaohe Population Cultured in Ponds. J. Lake Sci.2001,13(1):57-62. DOI:10.18307/20010109
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池塘放养中华绒螯蟹长江种群与辽河种群性早熟出现差异的观察与分析
王成辉, 李思发, 李晨虹, 赵金良
农业部水产增养殖生态、生理重点开放实验室, 上海水产大学, 上海 200090
摘要:
在上海水产大学上海崇明试验基地池塘养殖中发现,中华绒螯蟹辽河种群性早熟个体最初捕捉日期为8月15日,而长江种群为8月20日,二者相差5d.此后性早熟个体的捕捉数量逐渐上升,10月份达高峰期,11月份显著下降.在性早熟蟹群体中,辽河种群的性腺发育略领先于长江种群,而体重显著低于长江种群(P<0.01);雌、雄性早熟蟹不存在显著的体重差异,但雌性个体数量明显多于雄性个体数量.
关键词:  中华绒螯蟹  长江种群  辽河种群  性早熟  体重
DOI:10.18307/20010109
分类号:
基金项目:国家"九五"科技攻关项目(96-008-01-03-05)资助
Observation and Analysis on Appearing Difference of Precocious Crab of Yangtze Population and Liaohe Population Cultured in Ponds
WANG Chenghui, LI Sifa, LI Chenhong, ZHAO Jinliang
Key Laboratory of Ecology an d Physiology in Aquaculture, Ministry of Agriculture, Shanghai Fisheries University, Shanghai 200090, P. R. China
Abstract:
Combined with culture of juvenile crab in Chongmin experimental stat ion, a comparative experiment w as conducted on the precocious conditions of Yangt ze population and Liaohe population of mit ten crab (Eriocheir sinensis).The first catched date of Yang tze population was Aug.15, and Liaohe population w as Aug.20.From that time, the number of catched prococious crab of both populatio n climbed rapidly and reached the peak in Oct.The gonad of Yang tze population developed earlier than that of Liaohe population.In precocious population, the mean w eight of Liaohe population w as lower that of Yang tze population and sex difference in weight had no signif icance (P>0.05), but the number of male crab was much higher than that of female crab (P>0.05).
Key words:  Eriocheir sinensis  Yang tze populat ion  Liaohe population  precociousness  body w eight
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