283
M. Rawat et al. (eds.), Aquatic Ecosystem: Biodiversity, Ecology and Conservation,
DOI 10.1007/978-81-322-2178-4_16, © Springer India 2015
Abstract
The present study describes the length–weight relationship and condition
factor in Channa punctatus (Bloch) from Hussainsagar lake, Hyderabad
A.P. The work was carried out on 200 fishes ranging from 15 to 30 cm in
length. The value of correlation coefficient was calculated to be 0.991
indicating a high degree of correlation between the length and the weight.
The parabolic and regression equations were found to be w = 0.03273 L
2.621
and log W = −1.485 + 2.621 log L, respectively. Deviation in the cube law
was observed, and the condition factor showed continuous decrease with
increase in length indicating a physiological response of the fishes to
different environmental conditions of the lake waters.
Keywords
Length–weight • Channa punctatus • Fish • Hussainsagar lake
S. Anitha Kumari (*)
Department of Zoology, Osmania University College
for Women Koti, Hyderabad, Andhra Pradesh, India
e-mail: anitha_shinde2001@yahoo.com
N. Sree Ram Kumar
Department of Zoology, Nizam College,
Basheerbagh, Hyderabad, Andhra Pradesh, India
16
Length–Weight Relationship
and Condition Factor in Channa
punctatus (Bloch)
from Hussainsagar Lake,
Hyderabad, Andhra Pradesh, India
S. Anitha Kumari and N. Sree Ram Kumar
Introduction
The study of length–weight relationship is an
important tool in fishery biology, and according
to Lecren (1951), it is pursued with two
objectives: firstly, to describe the mathematical
model between the length and the weight so as to
derive one from the other (Beverton and Holt
1957; Wooton 1990) and, secondly, to compute
the departure from the expected weight for length
of the individual fish or a group of fishes as an
indicator of fatness or degree of well-being of
fish. This relationship is called the condition
factor (Wooton 1990). Further, the length–weight
relationship finds significance in the assessment
of the growth of fish in different environments
(Mirza et al. 1988). Many reports are available on
the study of length–weight relationship of fishes
subjected to pollution stress. Hence, the present
study was undertaken to estimate the length–
weight relationship and condition factor so as to
M. Rawat et al. (eds.), Aquatic Ecosystem: Biodiversity, Ecology and Conservation,
DOI 10.1007/978-81-322-2178-4_16, © Springer India 2015
Abstract
The present study describes the length–weight relationship and condition
factor in Channa punctatus (Bloch) from Hussainsagar lake, Hyderabad
A.P. The work was carried out on 200 fishes ranging from 15 to 30 cm in
length. The value of correlation coefficient was calculated to be 0.991
indicating a high degree of correlation between the length and the weight.
The parabolic and regression equations were found to be w = 0.03273 L
2.621
and log W = −1.485 + 2.621 log L, respectively. Deviation in the cube law
was observed, and the condition factor showed continuous decrease with
increase in length indicating a physiological response of the fishes to
different environmental conditions of the lake waters.
Keywords
Length–weight • Channa punctatus • Fish • Hussainsagar lake
S. Anitha Kumari (*)
Department of Zoology, Osmania University College
for Women Koti, Hyderabad, Andhra Pradesh, India
e-mail: anitha_shinde2001@yahoo.com
N. Sree Ram Kumar
Department of Zoology, Nizam College,
Basheerbagh, Hyderabad, Andhra Pradesh, India
16
Length–Weight Relationship
and Condition Factor in Channa
punctatus (Bloch)
from Hussainsagar Lake,
Hyderabad, Andhra Pradesh, India
S. Anitha Kumari and N. Sree Ram Kumar
Introduction
The study of length–weight relationship is an
important tool in fishery biology, and according
to Lecren (1951), it is pursued with two
objectives: firstly, to describe the mathematical
model between the length and the weight so as to
derive one from the other (Beverton and Holt
1957; Wooton 1990) and, secondly, to compute
the departure from the expected weight for length
of the individual fish or a group of fishes as an
indicator of fatness or degree of well-being of
fish. This relationship is called the condition
factor (Wooton 1990). Further, the length–weight
relationship finds significance in the assessment
of the growth of fish in different environments
(Mirza et al. 1988). Many reports are available on
the study of length–weight relationship of fishes
subjected to pollution stress. Hence, the present
study was undertaken to estimate the length–
weight relationship and condition factor so as to