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Maturation profile and fecundity of the exotic Oreochromis niloticus in the River Yamuna, India

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Title Maturation profile and fecundity of the exotic Oreochromis niloticus in the River Yamuna, India
Not Available
 
Creator Absar Alam, N.K. Chadha, K.D. Joshi, S.K. Chakraborty, P.B. Sawant, Tarkeshwar Kumar and A.P. Sharma
 
Subject Fecundity, Gonado-somatic Index, Maturity, Oreochromis niloticus, Yamuna
 
Description Not Available
The knowledge on the reproductive biology of fishOreochromis niloticus (Linnaeus, 1758) in riverine
condition is meagre in the Indian sub-continent which is necessary for the development of an appropriate
fishery management protocols for the rivers. In this context, the gonadal maturation profile and fecundity of
O. niloticus was studied. Mature, spawning and spent females recorded in almost all the months of the year
evidenced multiple and prolonged breeding behaviour. An overall sex ratio (M/F) of 1: 1.08 observed was
statistically non-significant from expected 1:1 ratio (χ2=6.994219, p=0.8642) indicating that males and
females were statistically equal in number. The absolute fecundity ranged from1192 to 4760 with mean of
2590 eggs from ovary weighing between1.91 g to 28.89 g. Monthly changes in gonado-somatic index (GSI)
revealed that fish bred throughout the year except in July and August, but at peak between October-
November and March-June. Size at first maturity of male was estimated as 229.6 mm with confidence limit
of 235.9 and 223.6 mm and for female as 238.1 mm with confidence limit of 244.7 and 231.7 mm,
respectively.
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Date 2021-08-05T07:25:40Z
2021-08-05T07:25:40Z
2015-01-01
 
Type Research Paper
 
Identifier Alam, A., Chadha, N. K., Joshi, K. D., Chakraborty, S. K., Sawant, P. B., Kumar, T. and Sharma, A. P. Maturation profile and fecundity of the exotic Oreochromis niloticus in the River Yamuna, India. Journal of Environmental Biology, 36(4):927-931.
ISSN: 0254-8704 (Print) ISSN: 2394-0379 (Online)
http://krishi.icar.gov.in/jspui/handle/123456789/53215
 
Language English
 
Relation Not Available;
 
Publisher Triveni Enterprises, Lucknow (Lucknow)