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西藏扁头(鮡)的年龄与生长特征
引用本文:张惠娟,谢从新,马宝珊,陈锋.西藏扁头(鮡)的年龄与生长特征[J].淡水渔业,2018(4):45-51.
作者姓名:张惠娟  谢从新  马宝珊  陈锋
作者单位:1. 西藏农牧学院高原生态研究所,西藏高原森林生态教育部重点实验室,西藏林芝高山森林生态系统国家野外科学观测研究站,西藏自治区高原森林生态实验室,西藏自治区生态安全联合实验室,西藏林芝860000;2. 中国水产科学研究院长江水产研究所,武汉,430223;3. 华中农业大学水产学院,武汉,430070
基金项目:国家自然科学基金项目(31360117),西藏特色农牧资源研发协同创新中心-高原生态平台
摘    要:为了解雅鲁藏布江扁头(鮡)种群的生物学特征, 制定合理的渔业资源管理和保护对策, 于2012年4-9月、2016年3-9月采集西藏帕隆藏布支流东久河、鲁朗河和拉月曲的695 尾扁头(鮡)(Pareuchiloglanis kamengensis),以耳石为年龄材料, 进行年龄与生长特征研究.结果表明: 扁头(鮡)群体样本体长分布范围为56~179 mm, 雌雄体长分布有显著差异, 范围分别为94~158 mm和98~179 mm; 群体年龄范围为2~20龄, 雄鱼年龄为5~18龄, 雌鱼年龄为6~20龄; 体长体重关系式为: W=3.330 6 × 10 -5SL2.81(n=695, R2=0.838), t检验表明种群为异速生长类型.采用von Bertalanffy方程拟合生长方程, 雌雄鱼体长生长方程分别为: Lt♀=165.97 1 -e-0.107(t+3.172)], Lt♂=200.31 1 -e-0.073(t+3.933)]; 雌雄鱼的生长拐点分别为6.24 龄和10.52 龄, 对应体长为105 mm和130 mm, 对应体重为16.44 g和28.96 g.由于扁头(鮡)生长缓慢, 为保证扁头(鮡)种群资源的可持续利用, 在捕捞时建议选择大于130 mm的个体.

关 键 词:扁头(鮡)(Pareuchiloglanis  kamengensis)  年龄  生长  青藏高原  Pareuchiloglanis  kamengensis  age  growth  Tibetan  plateau

Age and growth characteristics of Pareuchiloglanis kamengensis in Tibet
ZHANG Hui-juan,XIE Cong-xin,MA Bao-shan,CHEN Feng.Age and growth characteristics of Pareuchiloglanis kamengensis in Tibet[J].Freshwater Fisheries,2018(4):45-51.
Authors:ZHANG Hui-juan  XIE Cong-xin  MA Bao-shan  CHEN Feng
Abstract:Age and growth parameters of P.kamengensis were estimated using otolith as aging materials in this study to un-derstand the biological characteristics of Pareuchiloglanis kamengensis ( Jayaram,1966) and develop rational fishery man-agement measures to protect the population..Totally 695 individual fishes were collected from April to September in 2012 and March to October in 2016, in Parlung Zangbo River, Tibet.Standard lengths ranged from 56 to 179mm for all speci-mens.The body length for males and females had significant difference, 94 to 158 mm for females, and 98 to 179 mm for males.Ages ranged from 2 to 20 for all specimens, 6 to 20 years for females, and 5 to 18 years for males.The relationship between standard length and weight relation for P.kamengensis was described as W=3.330 6 × 10 -5SL2.81(n=695, R2=0.838), the t-test indicated that the growth of P.kamengensis was allometric.The von Bertalanffy function was used to model the observed length-at-age data as Lt♀=165.97 1 -e-0.107(t + 3.172)], Lt♂=200.31 1 -e-0.073 (t+3.933)]. Growth inflexion points were 6.24 and 10.52 years for females and males, respectively.The corresponding standard lengths and body weights were 105 mm and 16.44 g for females and 130 mm and 28 g for males, respectively.To protect the re-source of P.kamengensis, it is suggested that the minimum catchable size should be larger than 130 mm in individual standard length.
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