Journal of Ecology and The Natural Environment
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Article Number - 5E3381215006


Vol.5(10), pp. 310-317 , October 2013
DOI: 10.5897/JENE2013.0397x
ISSN: 2006-9847



Full Length Research Paper

Invasion of the Mozambique tilapia, Oreochromis mossambicus (Pisces: Cichlidae; Peters, 1852) in the Yamuna river, Uttar Pradesh, India


Mushtaq Ahmad Ganie1*, Mehraj Din Bhat 1, Mohd Iqbal Khan1, Muni Parveen2, M. H Balkhi 3 and Muneer Ahmad Malla1




1Department of Zoology, Faculty of Basic Sciences, Bundelkhand University Jhansi–284 128, U. P., India.

2Department of Zoology, Faculty of Biological Sciences, University of Kashmir, Srinagar–190 006, J & K, India.

3Faculty of Fisheries, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India.


Email: mushtaq.ganie16@gmail.com






 Accepted: 22 August 2013  Published: 31 October 2013

Copyright © 2013 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


Oreochromis mossambicus (Peters, 1852) is a highly successful invader of aquatic ecosystems due to its adaptable life history, tropic flexibility, ability to tolerate extreme and often unfavourable environmental conditions, rapid reproduction and maternal care of offsprings. Upon introduction to areas outside its natural range, these characteristics ofte give O. mossambicus a competitive advantage over indigenous fishes. The present study investigated the population characteristics of non-indigenous Mossambique Tilapia, O. mossambicus, for a period of 12-months from August 2009 to July 2010 in the lower stretch of Yamuna River in India. The Mossambique Tilapia, O. mossambicus, formed the most abundant fish species in all the catches from the Yamuna River at all the sampling stations. The gonado-somatic index (GSI) and the presence of all six gonadal stages confirmed that O. mossambicus has established a breeding population. The GSI for females indicated year-round reproduction with increased spawning intensity in spring (March to April) and monsoon (July to August). Males ranged from 142-280.0 mm total length (TL) and females from 130-265.0 mm TL. Small juvenile fish were collected every month of the year and multiple size classes present in sampling catches suggest successful recruitment of young. Adult O. mossambicus consumed primarily detritus and vegetal matter, though the diet of juveniles, collected from the Yamuna River, was found to be carnivorous. We expected Mozambique tilapia to further invade the Yamuna River due to natural dispersal. There is a need for more detailed studies of tilapia abundance, recruitment and local environmental conditions across the country to fully understand the invasion potential and consequences for the endemic aquatic biodiversity.

Key words: Exotic fish, Oreochromis mossambicus, invasion, colonization, Yamuna River, U.P.

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APA (2013). Invasion of the Mozambique tilapia, Oreochromis mossambicus (Pisces: Cichlidae; Peters, 1852) in the Yamuna river, Uttar Pradesh, India. Journal of Ecology and The Natural Environment, 5(10), 310-317.
Chicago Mushtaq Ahmad Ganie, Mehraj Din Bhat , Mohd Iqbal Khan, Muni Parveen, M. H Balkhi  and Muneer Ahmad Malla. "Invasion of the Mozambique tilapia, Oreochromis mossambicus (Pisces: Cichlidae; Peters, 1852) in the Yamuna river, Uttar Pradesh, India." Journal of Ecology and The Natural Environment 5, no. 10 (2013): 310-317.
MLA Mushtaq Ahmad Ganie, et al. "Invasion of the Mozambique tilapia, Oreochromis mossambicus (Pisces: Cichlidae; Peters, 1852) in the Yamuna river, Uttar Pradesh, India." Journal of Ecology and The Natural Environment 5.10 (2013): 310-317.
   
DOI 10.5897/JENE2013.0397x
URL http://www.academicjournals.org/journal/JENE/article-abstract/5E3381215006

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