Dynamics of reproductive ecology of the fish Ompok bimaculatus (Siluriformes: Siluridae) in six tropical rivers of the Ganges basin, India

Dynamics of reproductive ecology of the fish Ompok bimaculatus (Siluriformes: Siluridae) in six tropical rivers of the Ganges basin, India

Authors

  • Agnihotri Praveen ICAR-National Bureau of Fish Genetic Resources, Lucknow, India
  • Sarkar Uttam Kumar ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India
  • Nagpure Naresh Sahebrao ICAR-National Bureau of Fish Genetic Resources, Lucknow, India
  • Mishra Rahsya Mani ICAR-National Bureau of Fish Genetic Resources, Lucknow, India
  • Kumar Ravindra ICAR-National Bureau of Fish Genetic Resources, Lucknow, India
  • Awasthi Abhishek ICAR-National Bureau of Fish Genetic Resources, Lucknow, India
  • Pandey Brijesh Kumar ICAR-National Bureau of Fish Genetic Resources, Lucknow, India

DOI:

https://doi.org/10.22458/urj.v9i1.1681

Keywords:

Ganges basin, body size at first gonadal maturity, Ompok bimaculatus, reproductive potential, sex ratio, spawning season

Abstract

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<0.05) and positive in all the population.

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Published

2017-03-14

How to Cite

Praveen, A., Kumar, S. U., Sahebrao, N. N., Mani, M. R., Ravindra, K., Abhishek, A., & Kumar, P. B. (2017). Dynamics of reproductive ecology of the fish Ompok bimaculatus (Siluriformes: Siluridae) in six tropical rivers of the Ganges basin, India. UNED Research Journal, 9(1), 73–85. https://doi.org/10.22458/urj.v9i1.1681

Issue

Vol. 9 No. 1 (2017)

Section

Articles

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