Open AccessThe sex ratio, Gonadosomatic Index and Fecundity of the Copper Mahaseer, Neolissochilus hexagonolepis (Mc Clelland, 1839) from Tamor river, Nepal
Author(s) -
Suren Subba,
Vinod Kumar Mahaseth
Publication year - 2015
Language(s) - English
Resource type - Journals
ISSN - 2091-1343
DOI - 10.3126/njbs.v5i1.41738
Subject(s) - fecundity , gonadosomatic index , sex ratio , biology , zoology , gonad , fish <actinopterygii> , positive correlation , body weight , veterinary medicine , fishery , population , anatomy , demography , medicine , endocrinology , sociology
The sex ratio, Gonado Somatic Index and fecundity of the Copper Mahseer, Neolissochilus hexagonolepis were investigated. The sex ratio was 1:1.2 (Male to female). The gonado-somatic index ranged from 0.084 % to 16.47 % for female fish and 0.086% to 5.81 % for male fish. The highest mean GSI 9.037 % was recorded in July for female fishes and the highest 2.838 % was recorded in September for male fishes. The total weight and total length of the fishes had strong positive correlation. Also, the correlation between the weight of gonad and GSI was positively correlated. Absolute fecundity ranged from to 11424. Fecundity had strong positive correlation with total length (r = 0.98), total weight (r= 0.9) and total length (r= 0.88).