Reproductive characteristics of Psilorhynchus homaloptera Hora and Mukerji,1935 (Cyprinidae: Psilorhynchidae) in the lower Yarlung Zangbo River,Tibet

作     者：Pengcheng LIN Huaming HU Fei LIU Mingzheng LI Huanzhang LIU Pengcheng LIN;Huaming HU;Fei LIU;Mingzheng LI;Huanzhang LIU

作者机构：Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of SciencesChinese Academy of SciencesWuhan 430072China 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2021年第39卷第4期

页      面：1513-1522页

核心收录：

学科分类：0908[农学-水产] 09[农学] 

基　　金：Supported by the Powerchina Chengdu Engineering Corporation Limited 

主　　题：reproductive biology maturity spawning period fecundity environmental adaptation 

摘      要：Psilorhynchus homaloptera mainly inhabits turbulent waters in the lower reach of the Yarlung Zangbo River,Tibet,China,and it is the only species of Psilorhynchus in ***,many important aspects of its biology remain poorly documented,which hinders the conservation eff ***,we studied its reproduction using 801 specimens from the Motuo sector of the lower Yarlung Zangbo River from December 2015 to November *** sex ratio was 0.68꞉1(male꞉female)for the overall *** reached a larger total length and weight(134 mm and 18.6 g)than males did(113 mm and 12.2 g).Lengths at maturity were estimated 80.0 mm for males and 93.1 mm for *** analyses of gonad development and the size distribution of oocytes suggest that *** is a single spawner with the peak spawning period between September and ***,the estimated mean absolute fecundity was 557±204 eggs per fish,and mean relative fecundity was 50.9±10.9 eggs per g of female *** fecundity of *** increased linearly with increasing total length,total weight,ovary weight,and *** study on the reproductive biology of *** demonstrates that the fish was in a vulnerable state due to the increasing anthropogenic activities in the lower Yarlung Zangbo River.