| 李斌,解崇友,张婷,王志坚.2015.岷江眉山段四川华鳊的繁殖生物学资料.动物学杂志,50(4):563-570. |
| 岷江眉山段四川华鳊的繁殖生物学资料 |
| The reproductive biology of Sinibrama taeniatus (Nichols) from the Minjiang River (in Mei Shan city) |
| 投稿时间：2014-10-05 修订日期：2015-06-23 |
| DOI：DOI: 10.13859/j.cjz.201504008 |
| 中文关键词: 四川华鳊 繁殖生物学 资源保护 岷江 |
| 英文关键词:四川华鳊 繁殖生物学 资源保护 岷江 |
| 基金项目: |
|
| 摘要点击次数: 1953 |
| 全文下载次数: 2811 |
| 中文摘要: |
| 摘 要：于2013-2014年期间对岷江眉山段四川华鳊的繁殖生物学进行了研究。结果表明：4-5月份为其繁殖期；最小性成熟雌性个体为70 mm，体重为7.1 g；雄性体长为65 mm，体重为4.5 g；繁殖群体性比为1:1.56，由4个年龄组组成，其中1龄个体占绝对优势。性成熟系数4-5月份增加到最大，与之相对应丰满度达到最小。卵径（1.05±0.17）mm呈单峰型，绝对繁殖力（2734±258）粒，相对繁殖力为(236±20) 粒/g。该种为单批产卵型鱼类。绝对繁殖力随着鱼体长、体重增长而增大。 |
| 英文摘要: |
| Abstract: Sinibrama taeniatus (Nichols) is an endemic fish in the upper Yangtze River, and distribute in Sichuan Province and Chongqing City, China. At present, duo to the loss of habitat after the completion of the Three Gorge Project, and Xiangjiaba Dam Project, and other hydroelectricity project, is was forecasted that the population seizes of the endemic fish (S. taeniatus ) might decreased sharply in the future. So , this paper deals with the reproductive biology of S. taeniatus. 570 specimens were collected during March 2013 to January 2014 from Minjiang River of Meishan city , the first-order tributary of the Yangtze River. The results showed that the main spawning season of S. Taeeniatus population took place from April to May. The minimus size of mature female was 70 mm in length and 7.1 g in weight, while that of mature of the male was 65 mm and 4.5 g.in weight. The sex-ratio of males and females was 1:1.56 (χ2, P < 0.01) in the population. The population included 4 age-groups and most of them matured an 1-year-old. The gonadosomatic index (GIS) began to increase in March, and wit reached to the peak in May. On the contrary, fullniss decreased to the lowest in the same time. The egg dameter distribution in the ovary was unimodal at mature stage indication that the fish was a total spawner. The absolute fecundity of the mature females varied from 301 to 8789 eggs, with an average of (2734±258) eggs. And the relative fecundity to body weight varied from 15 to 1003 eggs per gram, with and average of (236±20) eggs per gram. The absolute fecundity for the mature females increased with body length, body weight, but the indexes of the both were not obvious. |
| 附件 |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
