alexa Reproductive Structure of Invading Fish, Oreochromis niloticus (Linnaeus, 1757) in Respect of Climate from the Yamuna River, India
ISSN : 2332-2594

Journal of Climatology & Weather Forecasting
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Research Article

Reproductive Structure of Invading Fish, Oreochromis niloticus (Linnaeus, 1757) in Respect of Climate from the Yamuna River, India

Amitabh Chandra Dwivedi1*, Priyanka Mayank1 and Sheeba Imran2

1Regional Centre, ICAR-Central Inland Fisheries Research Institute, 24 Panna Lal Road, Allahabad 211002, India

2Department of Biological Sciences, SHIATS, Allahabad, India

*Corresponding Author:
Amitabh Chandra Dwivedi
Regional Centre
ICAR-Central Inland Fisheries Research Institute
24 Panna Lal Road Allahabad 211002, India
Tel: 033-25920177
E-mail: [email protected]

Received date: April 18, 2015; Accepted date: April 28, 2016; Published date: May 06, 2016

Citation: Dwivedi AC, Mayank P, Imran S (2016) Reproductive Structure of Invading Fish, Oreochromis niloticus (Linnaeus, 1757) in Respect of Climate from the Yamuna River, India. J Climatol Weather Forecasting 4:164. doi:10.4172/2332-2594.1000164

Copyright: © 2016 Dwivedi AC, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Fish is a rich source of protein, vitamins and minerals. New knowledge on the role of omega-3 fatty acids in human physiology and their high contents in fish has added a new dimension to their importance in

health and nutrition

. Oreochromis niloticus (Nile tilapia) is one of the fish species of great economic importance in the globe. Reproductive biology of O. niloticus in the Yamuna was studied. Samples of O. niloticus were collected monthly during August 2011 to July 2012. The fishes breed in months of March to June and September to November. Sex ratio of male and female fishes was equal in 43.1-46.0 cm size group. Male proportion was higher in all size groups except 43.1-46.0 cm size group. In 10.1-13.0 cm, 25.1-28.0 cm and 28.1-31.0 cm size groups’ female proportion was half as compared to male fishes. Observed difference was not significant in all size groups, except 19.1-22.0 cm size group. Chi-square values were recorded maximum in 19.1-22.0 cm size group with 4.56 and minimum in 31.1-34.0 cm size group with 0.02. Higher proportion of male was observed in the stock, sex ratio of male and female was 1:0.78 and Chi-square value was 7.94 and the difference was significant. The fecundity and breeding frequency of O. niloticus indicated that the climate condition of the Yamuna river most suitable for O. niloticus.

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