张氏的繁殖生物学特性  

STUDIES ON THE REPRODUCTIVE BIOLOGY OF HEMICULTER TCHANGI FANG

作　　者：孙宝柱[1,2] 李晋 但胜国[1] 谭德清[1] 

机构地区：[1]中国科学院水生生物研究所,武汉430072 [2]中国科学院研究生院,北京100049 [3]四川省泸县水利局,泸县646106

出　　处：《水生生物学报》2010年第5期998-1003,共6页Acta Hydrobiologica Sinica

基　　金：国务院三峡工程建设委员会办公室生态环境项目(SX2006-013);长江上游珍稀;特有鱼类及保护区措施补偿科研项目(0605042-07);国家自然科学基金(50679095)资助

摘　　要：文章对赤水河河口段张氏的繁殖生物学进行了研究。结果表明:5—9月份为其繁殖期;最小性成熟个体为雌性体长77mm,体重5.3g;雄性体长108mm,体重9.4g,均为1龄;繁殖群体性比为1.07:1,由4个年龄组组成,其中2龄个体占绝对优势。性成熟系数3—7月份逐渐增大,然后持续减小,至12月降到全年最小值。卵径(0.75±0.14)mm呈单峰型,绝对繁殖力(11010±7723)粒,相对繁殖力(275.1±138.4)粒/g,每克卵巢卵粒数(3789±1389)粒。该种为单批产卵类型鱼类。绝对繁殖力随着鱼体体长、体重和年龄的增长而增大。Hemiculter tchangi Fang is an endemic fish in the upper Yangtze River, and mainly distribute in Sichuan Province and Chongqing City, China. At present, more and more researches have used endemic fish as indicative species to appraise the healthy of the river which they lived. Further more, due to the loss of habitat after the completion of the Three Gorges Project and other hydroelectricity projects, it was forecasted that the population sizes of the endemic fish might decreased sharply in the future. It is very urgent to make suitable countermeasures for the conservation and resource-recovery of those endemic species. So it is very important to study the biology of those fish. This paper deals with the reproductive biology of H. tchangi. One thousand and twenty three specimens were collected during November 2005 to February 2009 from the estuary of the Chishui River, the first-order tributary of the Yangtze River, which locates at Hejiang county of Sichuan Province. The results showed that the main spawning season of H. tchangi population took place from May to September. The minimum size of mature male was 108 mm in length and 9.4 g in weight, while that of mature female was 77 mm in length and 5.3 g in weight. Both of them were 1-year-old. There was significant different between the sex ratio in spawning season and non-spawning season. The sex ratio of males and females was 1.07：1 in the population, but there were more female individuals than male in the reproductive population （X2=9.643, P0.05, n=361）. The body length of the mature individuals ranged from 77 to 216 mm, and most of them ranged from 101 to 180 mm （87.3%）. The body weight ranged from 5.3 to 136.5 g, and most of them ranged from 10.1 to 80.0 g （90.3%）. The population included 4 age-groups, some of them had got mature at 1-year-old, but most of them matured at 2-year-old. The gonadosomatic index （GSI） began to increase in March, and it reached to the peak in July. On the contrary, it decreased to the lowest in December. The egg d

关 键 词：张氏 特有鱼类 繁殖 生物学 

分 类 号：Q958.8[生物学—动物学]