Amitabh Chandra
Dwivedi (Corresponding author)
|
Regional
Centre, Central Inland Fisheries Research Institute (ICAR), 24 Panna Lal Road,
Allahabad - 211 002, India
e-mail:
saajjjan@rediffmail.com
|
Publication Data
Paper received:
28
August 2010
Revised
received:
05
January 2011
Accepted:
05 February 2011
|
Abstract
A study was conducted on the
economically important fishes Labeo
rohita (Hamilton 1822), Tor tor
(Hamilton 1822) and
Labeo calbasu
(Hamilton
1822) stocks from the Ken, the Paisuni and the Tons rivers in the Vindhyan
region. Asymptotic length was maximum in L. rohita (946, 833 and 962 mm) as compared with T.
tor (822, 787 and 946 mm) and minimum in L. calbasu (567, 612 and 692 mm) in the Ken, the Paisuni and the
Tons rivers, respectively. The growth coefficient and total mortality was maximum in T. tor
compared to L. rohita and minimum in L. calbasu. Fishing mortality was maximum in T. tor (2.9, 4.57 and 3.44) and minimum in L. calbasu (0.51, 1.21 and 1.18) while natural mortality
was maximum in L. rohita (0.74, 0.94 and
1.86) and minimum in L. calbasu (0.47, 0.65
and 0.68). Natural mortality indicated that the habitat was more suitable for
L. calbasu. Comparatively, fishing pressure
was very high in T. tor than L. rohita and L. calbasu.?? Exploitation rate was maximum in T. tor (0.71, 0.82 and 0.84) compared to L. rohita (0.77, 0.74 and 0.56) and minimum in L. calbasu (0.52, 0.65 and 0.63) in the Ken, Paisuni and Tons
rivers, respectively.
Key
words
?Labeo
rohita, Tor tor, Labeo calbasu,
Population dynamics, Stock assessment
|
Copyright ? 2012 Triveni Enterprises. All rights reserved. No part
of the Journal can be reproduced in any form without prior
permission. Responsibility regarding the authenticity of the data, and
the acceptability of the conclusions enforced or derived, rest completely
with the author(s).
|