| 曾霖,唐文乔.2010.叶尔羌高原鳅的年龄、生长与繁殖特征.动物学杂志,45(5):29-38. |
| 叶尔羌高原鳅的年龄、生长与繁殖特征 |
| Age,Body Growth and Reproductive Characteristics of Triplophysa yarkandensis |
| 投稿时间：2009-12-29 修订日期：2010-06-21 |
| DOI： |
| 中文关键词: 叶尔羌高原鳅 年龄结构 生长特征 繁殖力 克孜河 新疆 中国 |
| 英文关键词:Triplophysa yarkandensis Age structure Growth characteristics Fecundity Kezi River,Xinjiang,China |
| 基金项目:上海市教育委员会E-研究院项目(No.E03009);上海市重点学科建设项目(No.S30701) |
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| 中文摘要: |
| 分析了2008年5月采自新疆克孜河264尾叶尔羌高原鳅(Triplophysa yarkandensis)的年龄结构、生长特征和繁殖力。结果显示,种群年龄由2～11龄组成,其中2～4龄组个体占94.49%。平均体长和体重雌性为(9.39±2.10)cm和(16.55±15.85)g,雄性为(9.17±2.27)cm和(15.38±15.20)g,两者在雌雄群体间差异均不显著(P>0.05)。体长和体重关系式为W♀+♂=0.014 0L2.988 9(r=0.975 4),W♀=0.016 7L2.889 5(r=0.980 9),W♂=0.011 7L3.083 1(r=0.975 7)。生长指标和年增重均以4龄组最大,分别为1.86和18.79 g/年。雌雄性比为0.7∶1.0。2龄性即成熟。最小成熟体长和体重雌性为6.2 cm和4.46 g,雄性为4.6 cm和1.67 g。绝对怀卵量为6 136～405 555(平均28 716±42 698)粒,相对怀卵量为672～6 134(平均2 310±1 427)粒/g。卵径呈单峰型分布,推测为不分批产卵类型。依据同年8月采集的19尾幼体日龄推算,其繁殖期为5月下旬至6月下旬。 |
| 英文摘要: |
| We studied the age structure,body growth and fecundity of Triplophysa yarkandensis based on 264 samples collected from Kezi River in southern Xinjiang Uygur Autonomous Region in May 2008.The age of samples ranged from 2 to 11 years old,most individuals(94.49%) were aged 2 to 4 years old.Average body length and body weight of female were 9.39 ± 2.10 cm and 16.55 ± 15.85 g,and male were 9.17 ± 2.27 cm in length and 15.38 ± 15.20 g in weight,no significant differences between female and males(P > 0.05).Relationships of body length and body weight were W♀+♂= 0.014 0L2.988 9(r=0.975 4),W♀=0.016 7L2.889 5(r=0.980 9),W♂=0.011 7L3.083 1(r=0.975 7).Growth index and annual weight increment appeared peak at four years old,1.86 and 18.79 g per year,respectively.Sex ratio was 0.7∶ 1.0(♀∶♂),and individual matured in two years old.The minimum mature body length and weight of female were 6.2 cm and 4.46 g,meanwhile the male were 4.6 cm and 1.67 g.Absolute fecundity ranged from 6 136 to 405 555 and the mean value was 28 716 ± 42 698,the relative fecundity were from 672 to 6 134(eggs per gram) and the mean value was 2 310 ± 1 427.The distribution of egg diameters showed a single peak,which might indicate one-time spawning of this population.The breeding season was from late May to late June based on the daily growth of 19 juvenile fish captured in August 2008. |
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