| 怒江上游裸腹叶须鱼的年龄结构与生长特性 |
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| 引用本文： | 李钊,朱峰跃,刘明典,王起,刘绍平,段辛斌.怒江上游裸腹叶须鱼的年龄结构与生长特性[J].淡水渔业,2019,49(4):42-49. |
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| 作者姓名： | 李钊 朱峰跃 刘明典 王起 刘绍平 段辛斌 |
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| 作者单位： | 上海海洋大学水产科学国家级实验教学示范中心,上海 201306;中国水产科学研究院长江水产研究所,武汉 430223;中国水产科学研究院长江水产研究所,武汉,430223 |
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| 基金项目： | 农业部西藏重点水域渔业资源与环境调查专项 |
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| 摘 要： | 以2017年5 6月和910月在怒江上游察瓦龙县至那曲县江段采集的225尾裸腹叶须鱼(Ptychobarbus kaznakovi)为研究对象,对比脊椎骨和微耳石两种鉴定年龄材料,分析其年龄结构与生长特性。结果显示:微耳石判别年龄具有较高的准确性和精确度。裸腹叶须鱼优势体长为101~250 mm,占总样本的78.48%,优势体重为0~150 g,占总样本的91.11%。裸腹叶须鱼种群由1~10龄和13龄11个年龄组组成,优势年龄组为3~5龄,占样本总数的66.22%,其中4龄鱼数量最多,占样本总数的27.56%,高龄鱼较少。体长与体重的拟合关系式为:W=2×10-5 L2.8644(R2=0.9893,n=225),Von Bertalanffy生长方程:L t=699.571-e-0.0615(t+0.842 9),W t=2 816.821-e-0.0615(t+0.842 9)2.8644,生长系数k为0.0615,表明怒江上游裸腹叶须鱼为缓慢生长型鱼类。拟合生长速度方程,生长加速度方程得出年龄生长拐点t i为16.27龄,对应的体长l i为455.36 mm,对应体重w i为823.42 g。
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| 关 键 词： | 裸腹叶须鱼(Ptychobarbus kaznakovi) 年龄结构 生长特性 怒江上游 |
Age structure and growth characteristics of Ptychobarbus kaznakovi in the upper Nujiang River |
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| LI Zhao,ZHU Feng-yue,LIU Ming-dian,WANG Qi,LIU Shao-ping,DUAN Xin-bin.Age structure and growth characteristics of Ptychobarbus kaznakovi in the upper Nujiang River[J].Freshwater Fisheries,2019,49(4):42-49. |
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| Authors: | LI Zhao ZHU Feng-yue LIU Ming-dian WANG Qi LIU Shao-ping DUAN Xin-bin |
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| Institution: | (National Demonstration Center for Experimental Fisheries Science Education,Shanghai Ocean University,Shanghai 201306,China;Yangtze River Fisheries Research Institute,Chinese Academy of Fishery Science,Wuhan 430223,China) |
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| Abstract: | A total of225 individuals of Ptychobarbus kaznakovi Nikoisky were collected during May to June and September to October2017 from Zuogong to Naqu section in the upper Nujiang River.Vertebrae and lapillus were sampled compared for age assessment.Meanwhile,the age structure and growth characteristics were analyzed.The results showed that lapillus as an age identification material has a higher accuracy.The dominated body length was from101 to250 mm,accounting for 78.48% of the total sample.The dominated body weight was from 0 to150 g,accounting for 91.11% of the total sample.The population was composed of1-10 and13 age groups,dominant for3 to5 years old,which accounting for 66.22% of the total number of samples.The number of4 age fish was the most,accounting for27.56% of the total number of samples.Body length and weight relationship was as follows: W=2×10 -5 L2.8644 ( R2=0.9893,n=225 ).The Von Bertalanffy growth model was L t=699.571- e -0.0615(t+0.842 9),W t=2 816.821- e -0.0615(t+0.842 9)2.8644 .The coefficient of growth k was 0.0615,which showed that Ptychobarbus kaznakovi was a slow-growing fish in the upper Nujiang River.The growth inflexion point st i was16.27 years old,corresponding body length l i was455.36 mm and body weight w i was 823.42 g. |
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| Keywords: | Ptychobarbus kaznakovi age structure growth characteristics Nujiang River |
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