Gonad indices,morphology and muscle fatty acid compositions of male and female golden mahseer(Tor putitora)sampled from lake Bhimtal(Himalaya)at different seasons of the year  

作　　者：Annu Sharma Debajit Sarma Rini Joshi Partha Das MdShahbaz Akhtar Veena Pande Prakash Sharma 

机构地区：[1]ICAR-Directorate of Coldwater Fisheries Research,Bhimtal,263136,India [2]Department of Biotechnology,Kumaun University,Bhimtal Campus,Bhimtal,263136,India

出　　处：《Aquaculture and Fisheries》2024年第4期603-616,共14页渔业学报（英文）

摘　　要：Adult male and female golden mahseer(n=10-12)were collected during summer,monsoon,pre-winter and winter for evaluating gonadal seasonality,condition factor(CF),viscera-hepatosomatic index(VHSI),hepatocyte density(HD)and muscle fatty acid(FA)profile.In summer and monsoon,all males,but only 67%and 71%of females,were spawning capable in respective seasons.In pre-winter,males were mostly in regressing,but females were in regenerating phases.In winter,50%of males and 14%of females were in the early spawning capable phase.VHSI and HD,in males only,were respectively highest and lowest in winter,indicating their nutrient recovery starting in pre-winter and completing in winter.Seasonal muscle FA profile of females only was linked to gonadal status,where C20:1,C22:1,C18:3n-6,C18:3n-3,C20:4n-3,C22:6n-3,total n-3 and n-6 FAs were depleted in peak spawning seasons.Overall,it was found that their spawning peak falls in summer and monsoon,but few early and late spawners were detected in winter and pre-winter,respectively.Males and females exhibited a different reproduction-linked nutrient allocation pattern;hepatic nutrient dynamic was prominent in males,but muscle FA dynamic was pronounced in females.CF dynamic was similar in both sexes.

关 键 词：Golden mahseer Seasonal gonadal cycle Nutritional status Muscle fatty acid 

分 类 号：S917[农业科学—水产科学]