Studies On Length-Weight Relationship and Condition Factor in Different Age Groups of Tor Putitora (Ham.) from Jhajjar Stream, Jammu (J and K)  

Roopma Gandotra, Ravi Shanker, Shiraz Ahmed and Shakti Sagar

Department of Zoology, University of Jammu, Jammu - 180 006 India.

Corresponding Author E-mail: ravizoology@yahoo.com

ABSTRACT: The present work describes Length-weight relationship and Condition factor in different age groups of Tor putitora (Ham.) from Jhajjar stream, a tributary of River Tawi. The work was carried out on about 300 specimens ranging from 2.5 cm to 38.5 cm of length and 1.02 gm to 520.81 gm of body weight respectively. The values of correlation coefficients indicated a high degree of correlation between length and weight in different age groups viz. 0.957 (0+ age group), 0.994 (1+ age group), 0.995 (2+ age group), 0.968 (3+ age group) and 0.993 (pooled specimens). The Parabolic equations obtained were W= 0.04416 L2.311(0+ age group), W= 0.01268 L2.909(1+ age group), W= 0.00787 L3.068 (2+ age group), W= 0.00465 L3.199(3+ age group) and W= 0.01570 L2.835 (Pooled) and the Regression equations were Log W= -1.355+2.311 log L (0+ age group), Log W= -1.897+2.909 Log L (1+ age group), Log W= -2.104+3.068 Log L (2+ age group), Log W= -2.332+3.199 Log L (3+ age group) and Log W= -1.804+2.835 Log L (Pooled). Except for deviation in 0+ age group, the fish was observed to follow cube law. The condition factor (K) was found to decrease with the advancing age.

KEYWORDS: Length-weight relationship; cube law; condition factor

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