%0 Journal Article
%T 金沙江攀枝花江段白缘（鱼央）的繁殖生物学<br>Reproductive Biology of Liobagrus marginatus (Günther) in Panzhihua Reach of the Jinsha River
%A 于学颖
%A 谭德清
%A 但胜国
%A 王剑伟
%J 四川动物
%D 2018
%X 中文摘要：为丰富白缘（鱼央） Liobagrus marginatus （Günther）的基础生物学资料，于金沙江攀枝花江段收集到729尾性腺可辨的样本，分析其年龄结构、性别比、初次性成熟个体大小以及繁殖力等繁殖生物学特征。结果表明：繁殖群体由1~4龄4个年龄组组成，其中2龄个体在数量上占绝对优势（63.83%），其对种群繁殖力的贡献为62.07%。在性成熟个体中，雌性和雄性分别为64尾和77尾，雌雄比=1∶1.20；符合1∶1理论比值（ χ 2=1.199， P>0.05）；雌、雄最小性成熟个体体长分别为66.80 mm、67.32 mm，体质量分别为5.7 g、6.7 g。攀枝花江段白缘（鱼央）的繁殖季节为3—6月，绝对繁殖力平均值为161.2粒±55.1粒。Ⅳ期卵巢中卵子发育不完全同步，卵径变幅为0.29~3.86 mm。金沙江攀枝花江段白缘（鱼央）性成熟快，但繁殖力低，繁殖群体主要由低龄个体组成，种群资源亟需保护。<br>英文摘要：To explore the basic biological characteristics of Liobagrus marginatus (Günther) in the Panzhihua reach of the Jinsha River, 729 specimens were used to analyze their age structure, the ratio of female to male, body length and body weight at sexual maturity, and fecundity in this study. The breeding stock was consisted of 4 age groups (Age 1 to 4), of which 2-age was the dominant group (63.83%) and contributed 62.07% to population fecundity. Among sexual mature specimens, 64 were female and 77 were male, thus the ratio of female to male was 1:1.20, which met the theoretical value of 1:1 ( χ 2=1.199, P>0.05). The minimum body length and body weight of mature female and male were 66.8 mm, 5.7 g and 67.32 mm, 6.7 g, respectively. The breeding season of L. marginatus was from March to June. The average absolute fecundity was 161.2 eggs±55.1 eggs. The development of oocytes in Stage IV ovaries was not completely synchronous, and the egg diameter varied between 0.29 mm to 3.86 mm. Although L. marginatus in Panzhihua reach of the Jinsha River was fast to sexual maturity, its fecundity was low, and the breeding stock was mainly composed of young individuals. The current study indicates the urgent need to strengthen the protection of this species. 2018,37(3): 291-297 收稿日期：2017-09-15 DOI：10.11984/j.issn.1000-7083.20170288 分类号：Q959.4 基金项目：国家自然科学基金项目（50679095）；广西科技厅基金项目（2016GXNSFBA380142）；广西教育厅基金项目（KY2016YB476，KY2016YB487） 作者简介：于学颖(1984-),女,博士,讲师,研究方向为濒危生物养护,E-mail:junzhi45@163.com *通讯作者：王剑伟,男,博士,研究员,研究方向为鱼类生物学,E-mail:wangjw@ihb.ac.cn 参考文献： 曹文宣. 1960. 梁子湖的团头鲂和三角鲂[J]. 水生生物学集刊, 4(1):57-82. 陈佩薰. 1959. 梁子湖鲫鱼的生物学研究[J]. 水生生物学集刊, 3(4):411-419. 丁瑞华. 1994. 四川鱼类志[M]. 成都:四川科学技术出版社. 段中华, 孙建贻. 1999. 瓦氏黄颡鱼的繁殖生物学研究[J]. 水生生物学报, 23(6):610-616. 湖北省水生生物研究所鱼类研究室. 1976. 长江鱼类[M]. 北京:科学出版社 李康, 李渝成, 周墩. 1985. 白缘性别决定的细胞学证据[J]. 遗传, 7(3):23-24. 刘小红, 郭宇辉, 王宝森, 等. 2007. 嘉陵江下游白缘的个体生殖力研究[J]. 淡水渔业, 37(2):41-43. 龙华, 黄燕, 陈建武, 等. 2007. 白缘的血液指标测定与血细胞特点[J]. 水利渔业, 27(5):15-21. 龙华, 刘江东, 余其兴, 等. 2005. 白缘的驯养与人工繁殖初试[J]. 渔业现代化, 32(3):21-23. 龙华, 汪登强. 2004. 白缘染色体核型分析[J]. 淡水渔业, 34(2):9-10. 申严杰, 蒲德永, 高梅, 等. 2005. 福建纹胸年龄与生长的初步研究[J]. 西南农业大学学报(自然科学版), 27(1):106-110. 孙效文, 杨彦豪, 龙华, 等.
%K 金沙江
%K 白缘（鱼央）
%K 繁殖生物学&lt
%K br&gt
%K 英文关键字：Jinsha River
%K Liobagrus marginatus (Günther)
%K reproductive biology
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