Reproductive
biology of Indian Silurid catfish
Ompok
pabda in river Gomti
Braj Kishor Gupta1,
Uttam Kumar Sarkar1* and Sanjay Kumar Bhardwaj2
1National Bureau
of Fish Genetic Resources, Lucknow-226 002, India
2Department of
Zoology, Chaudhary Charan Singh University, Meerut-250 004, India
*Corresponding
Author E-mail: usarkar1@rediffmail.com
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Publication
Data
Paper received:
26 April 2012
Revised received:
06 March 2013
Accepted:
03 June 2013
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Abstract
Reproductive
biology of an Indian Silurid catfish, Ompok pabda were determined in a
moderately impacted tropical River Gomti in India. Samples of fish were
collected monthly between May 2008 to April 2009 in two zones; upstream site
at Mishrikh, Sitapur and midstream site at Lucknow. Length at first maturity
calculated through maturity curve was 12.9 cm (males) and 13.9 cm (females)
in total length. The gonado-somatic index indicated that spawning generally
occurred between June - September and sex ratio showed a predominance of
females, representing 54.3% of the total sample. The fecundity was found to
vary from 2460 to 5986 nos, with mean of 4330 ? 799 for the fish with total
length of 11.5-20.0 cm. The relationship of fecundity with total length and
total body weight of the fish was Log F = 0.374 Log L+ 0.37, r2 =
0.999 and Log F = 0.337 Log W ? 0.40, r2 = 0.966. The well defined
traits of O. pabda from the Ganges basin provide basic information
which can be further used for species conservation planning.
Key
words
Fecundity,
Gomti River, Ompok pabda, Sexual maturity,? Silurid fish
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