Dynamics of reproductive ecology of the fish Ompok bimaculatus (Siluriformes: Siluridae) in six tropical rivers of the Ganges basin, India
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1 juin 2017
- handle: 10670/1.bqw67i
info:eu-repo/semantics/openAccess
Mots-clés
Ganges basin body size at first gonadal maturity Ompok bimaculatus reproductive potential sex ratio spawning seasonSujets proches
Animals--Size Animal size Size of body Weight and measurement basinCiter ce document
Agnihotri Praveen et al., « Dynamics of reproductive ecology of the fish Ompok bimaculatus (Siluriformes: Siluridae) in six tropical rivers of the Ganges basin, India », Cuadernos de Investigación UNED, ID : 10670/1.bqw67i
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The silurid butter catfish, Ompok bimaculatus (Bloch, 1794), is widely distributed in the plains and sub-mountain regions of India, but not enough is known about its reproductive potential is still insufficient. The present study evaluated the comparative reproductive potential (in terms of sex ratio, spawning season, body size at first gonadal maturity, gonadosomatic index, fecundity, egg dimension, egg weight etc.) of fish (n=1223) from six tropical tributaries of the Ganges basin during January 2011-December 2013. The females had relatively greater weight and length. The body size at 50% first gonadal maturity (L50%) ranged between 228-262mm in females and 198-247mm in males. The population has high and low fecundities. The correlations between absolute fecundity and total length, as well as between body weight and gonad weight, were significant (p