Research article

Age determination of minor carp, Cirrhinus reba (Hamilton) from Manchar Lake, Sindh, Pakistan

Jalbani S, *Narejo NT, Jalbani YM, Lashari PK and Laghari MY

Department of Fresh Water Biology and Fisheries, University of Sindh, Jamshoro, Pakistan

*Corresponding Author E-mail: dr_ntnarejo46@yahoo.com

Accepted 29 November 2014

Abstract

For age determination study of cirrhinus reba (Hamilton) from Manchar, length-frequency analysis and scale method was used. It was determined from 256 specimens (171 male and 85 female) collected during March to June 2013 ranging in length between 95 to 330 mm in total length. The entire data were pooled, male, female and their combined length-frequencies as percentage. It was inferred from the length-frequency analysis that the model length of group 10.0-20.0 cm represents as 0+ age group and the subsequent model lengths 20.0- 30.0 cm designated as 1+ age group respectively. The peaks of frequency histogram, beyond two years were not found to be distinct. The relationship between total length versus scale length was found to ne linear Log L = 0.78 + 0.95 Log S. The age estimate from scales resulted in to two groups 0+ and 1+ at model length 17.5 and 28.0 cm. The age determination from length-frequency and scale method compared very well.

Keywords: Age determination, Cirrhinus reba, Length-frequency, Manchar lake