| 嘉陵江下游短体副鳅繁殖群体结构的研究 |
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| 引用本文： | 宋玉东,熊丽娜,赵桥弟,邓玉江,王志坚.嘉陵江下游短体副鳅繁殖群体结构的研究[J].安徽农业科学,2009,37(1):169-170. |
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| 作者姓名： | 宋玉东 熊丽娜 赵桥弟 邓玉江 王志坚 |
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| 作者单位： | 西南大学生命科学院水产科学重庆市市级重点实验室,重庆,400715 |
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| 基金项目： | 国家支撑计划项目资助(2006BAD03B0904) |
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| 摘 要： | 目的]研究短体副鳅繁殖群体的结构特征,积累副鳅属鱼类的生物学资料。方法]对采自嘉陵江的208尾繁殖季节的短体副鳅成熟个体年龄、体长、体重及雌雄生长特性等进行研究。结果]繁殖群体的性比为♀∶♂=5.71∶1.00。繁殖群体由1~5龄鱼组成,以2~3龄组为主。短体副鳅的体长范围为49.0~84.0 mm,体重范围为2.6~11.0 g。最小性成熟年龄是1龄;最小性成熟个体雌性体长49.0mm,体重2.6 g;雄性体长55.5 mm,体重3.7 g。群体体重（W）与体长（L）的关系：雌＋雄为W=0.000 2×L2.477 2;雌为W=7.0×10-5×L2.753 5;雄为W=0.002 1×L1.896 4。生长系数雌性大于雄性;繁殖群体（雌＋雄）的生长系数b=2.477 2〈3,说明短体副鳅个体发育正常呈异速生长趋势。结论]短体副鳅的生长峰值均出现在性成熟后1~2年内,最佳捕捞期应该在3龄以后。
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| 关 键 词： | 短体副鳅 繁殖群体结构 特种鱼类 性比 生长特性 |
Study on the Composition of the Reproductive Population of Paracobitis potanini in the Lower Reaches of the Jialing River |
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| SONG Yu-dong et al.Study on the Composition of the Reproductive Population of Paracobitis potanini in the Lower Reaches of the Jialing River[J].Journal of Anhui Agricultural Sciences,2009,37(1):169-170. |
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| Authors: | SONG Yu-dong |
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| Institution: | SONG Yu-dong et al (Key Laboratory of Aquatic Science of Chongqing,School of Life Science,Southwest University,Chongqing 400715) |
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| Abstract: | Objective] The composition of the reproductive population of Paracobitis potanini was researched to collect its biological data.Method] The age,the length and weight of the body and sex of 208 Paracobitis potaninis collected from the Jialing River in the reproductive period were tested.Results] The ratio of ♀∶♂ was 5.71∶1.00.The age of the reproduction population was 1-5 years old, and the dominator population was with 2-3 years old.The length and the weight of its ranged from 49.0 mm to 84.0 mm and from 2.6 g to 11.0 g,respectively.Both mature male and female fish at 1 year old could be founded in the reproduction population.The size of matured female was 49.0 mm in length and 2.6 g in weight while those of matured male were 55.5 mm and 3.7 g,respectively.The relationship between weight and length was described as follows: W=0.000 2×L2.477 2(N=208,R=0.822 3)(male and female),W=7.0×10-5×L2.753 5(N=177, R=0.848 7)(female) and W=0.002 1×L1.896 4(N=31,R=0.746 9)(male).The growth coefficient(value of b) of female was bigger than that of male,and the value b in reproductive population(female and male) was 2.477 2(less than 3),which showed that the henogenisis of Paracobitis potanini was of the type: allometric growth.Conclusion] The growth of Paracobitis potanini would achieve the peak in 1 or 2 years after maturing and the best catching time was after 3 years old. |
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| Keywords: | Paracobitis potanini Reproductive population Endemic fish Sexual ratio Growth characteristics |
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