| 蓝昭军,徐嘉良,李强,赵俊,钟良明.2015.侧条光唇鱼两邻近地理种群的繁殖生物学特征的差异.动物学杂志,50(5):735-743. |
| 侧条光唇鱼两邻近地理种群的繁殖生物学特征的差异 |
| A comparative study on reproductive biology of two neighboring populations of Acrossocheilus parallens |
| 投稿时间：2014-11-10 修订日期：2015-09-10 |
| DOI：DOI: 10.13859/j.cjz.201505009 |
| 中文关键词: 侧条光唇鱼 繁殖生物学 差异 北江 流溪河 |
| 英文关键词:Acrossocheilus parallens, reproductive biology, distinction, Beijiang River, Liuxihe River |
| 基金项目:广东省科技计划资助项目(2005A20105001,2006B20701001,2006B20201002)；广东重大科技兴海(渔)资助项目(B200601G02)；广东省海洋渔业科技专项(A201001E04)；公益性行业(农业)科研专项经费资助(201303048)。 |
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| 中文摘要: |
| 2007年7月至2009年6月间,分别于北江中上游及流溪河上游支流采集侧条光唇鱼样本358尾及522尾,对两种群的繁殖生物学特征的差异进行了研究。研究结果显示,两种群雌鱼及雄鱼的最小性成熟年龄均为1 龄,北江种群雌性由1 ~5 龄组成,雄性由1 ~4 组成,性比为雌性：雄性=1:1.73；而流溪河种群雌性由1 ~4 龄组成,雄性由1 ~3 组成,性比为雌性：雄性=1:1.40。北江种群繁殖群体的各年龄组体长及体重均较显著大于流溪河种群。北江种群的繁殖期约为2~10月份,高峰期为3~7月份；而流溪河种群繁殖期为2~8月份,高峰期约为每年的5~7月份；繁殖期内,北江种群雌性及雄性的成熟系数均高于流溪河种群。北江种群各年龄组或体长组的绝对生殖力、体长相对生殖力与体重相对生殖力均极显著地大于流溪河种群。本文结合北江和流溪河在营养状况、捕捞压力及溪流级别上的差异对研究结果进行了分析和讨论。 |
| 英文摘要: |
| 358 and 522 specimens of Acrossocheilus parallens were collected from July 2007 to June 2009 in the middle and upper reaches of Beijiang River and the upstream area of Liuxihe River, respectively. These specimens were used for the comparative study on reproductive characteristics of these neighboring populations. The scales were collected and used for age determination, the total length, standard length, total weight, net body weight and ovary weight were measured, and the gonadosomatic index and the fullness were calculated. The results showed that the age of reproductive population we collected in from 1 to 5 for female, and 1 to 4 for male in Beijiang River population, and the sex ratio of female to male in the reproductive population is 1:1.73. The corresponding number was 1 to 4 for female, and 1 to 3 for male in Liuxihe River population, with the sex ratio of female to male in the reproductive population is 1:1.40. For different age groups, both standard length and total weight of the reproductive population of Beijiang River were significantly larger than Liuxihe River population. The Beijiang River population have longer spawning period than the Liuxihe Population: the spawning period of A. parallens in the Beijiang River population was from January to October, mainly in March to July, while the population of Liuxihe River population was from January to August, mainly in May to July. In the spawning period, for both of female and male of Beijiang River population, the gonadosomatic indices were higher than the Liuxihe population. All of the individual absolute fecundity (F), the individual relative fecundity of standard length (FL) and the individual relative fecundity of total weight (FW) of the Beijiang River population, were significantly higher than that of the Liuxihe population. All the distinction between the populations of Beijiang River and Liuxihe River were analyzed with the nutrient status, fishing intensity, and the stream order. |
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