| 中华鲱鲇繁殖生物学研究 |
| Reproductive Biology of Clupisoma sinense |
| 投稿时间：2016-01-13 修订日期：2017-11-22 |
| DOI：10.15928/j.1674-3075.2017.06.014 |
| 中文关键词:中华鲱鲇 性腺发育 繁殖力 |
| 英文关键词:Clupisoma sinense gonad development reproductive biology |
| 基金项目:云南省应用基础研究计划项目2013FZ164；华能澜沧江糯扎渡鱼类增殖站增殖技术科研项目 |
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| 中文摘要: |
| 研究中华鲱鲇繁殖生物学，为中华鲱鲇的人工繁殖及种质资源保护提供依据。2013-2015年在澜沧江中下游景临桥江段、糯扎渡江段、景洪江段及支流罗梭江勐仑江段采集中华鲱鲇标本及活体1000余尾。结果表明：中华鲱鲇繁殖期从5月初一直延续至8月底，6月中旬至7月中旬为高峰；最小性成熟个体雌性体重27.10g、体长12.8cm，雄性体重23.65g、体长12.1cm；雌雄比例1.18；每1g卵巢卵粒数1208~1872粒，绝对繁殖力20143~101301粒，均值（56367±26800）粒；相对繁殖力222~379粒/g，均值（276±61）粒。中华鲱鲇为单批产卵类型鱼。绝对繁殖力随着鱼体体长、体重的增长而增大。 |
| 英文摘要: |
| Clupisoma sinense is a representative fish species and an important economic fish in the lower Lancang River. At present, the habitat of C. sinense has been severely impacted by large-scale hydropower development on the Lancang River, which has seriously disturbed reproduction and diminished populations. In this study, we investigated the characteristics of the reproductive biology, population distribution and status of C. sinense in lower Lancang River, aiming to provide evidence of the need for artificial reproduction and genetic resource conservation of C. sinense. From May 2013 to October 2015, an investigation of C. sinense populations was carried out in the following sections: the Jinglinqiao, Nuozhadu, Jinghong to Menghan and the Menglun section of Buyuan River. More than1000 specimens were collected in the lower Lancang River and its tributary. The living specimens were domesticated in the Nuozhadu fish breeding station for artificial spawning induction testing. Ninety-six specimens (♀52,♂44) with clear gonads, collected during the breeding season from Jinghong to Menghan, were selected for reproduction and statistical analysis of biological parameters. Results indicated that: existing wild populations of C. sinense population in the Jinglinqiao section are not sufficient to form an effective breeding population; the resource in the Nuozhadu section is much better, but the maturity level is low; the resource in sections below Jinghong on the main stem of Lancang River and in Buyuan tributary remain rich. The breeding season of C. sinense lasts almost four months, from early May to the end of August, and peaks from mid-June to mid-July. The gonadosomatic index of males and females in mid-June ranged, respectively, from 0.6% to 3.2% and from 3.4% to 21.7%. Among the 96 specimens collected, the minimum weight and length among mature females and males were, respectively, 27.10g and 23.65g, and 12.8cm and 12.1cm, and the maximum weight and length among mature females and males were, respectively, 267.01g and 85.56g, and 25.0cm and 17.2cm respectively. The females were primarily in the range 30-130g and 12-20cm, while males were primarily in the range 25-85g and 12-17cm. The body weight and length of the females were heavier and longer than those of the males. The egg number of per gram for female C. sinense with ovary at stage V was 1208-1872, and the absolute fecundity ranged from 20143 to 101301 eggs with an average value of (56367±26800) eggs, and the relative fecundity ranged from 222 to 379 eggs per gram with an average value of (276±61) eggs per gram. The female C. sinense lays just one batch of eggs per year, and the absolute fecundity is positively correlated with the body length and weight. |
| 薛晨江,雷春云,符世伟.2017.中华鲱鲇繁殖生物学研究[J].水生态学杂志,38(6):102-106. |
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