Effect of stocking density on growth, maturity, fecundity, reproductive behaviour and fry production in the mouth brooding cichlid Oreochromis mossambicus (Peters)

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Shubha, M. and Reddy, S.R. (2011) Effect of stocking density on growth, maturity, fecundity, reproductive behaviour and fry production in the mouth brooding cichlid Oreochromis mossambicus (Peters). African Journal of Biotechnology, 10 (48). pp. 9922-9930. ISSN 16845315

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Abstract

Growth and reproductive performance of Oreochromis mossambicus (Peters) in relation to stocking density was evaluated in indoor aquaria. Juveniles weighing 978 ± 370 mg were held in densities of 10, 20, 30 and 40 aquarium- 1 (429, 858, 1287 and 1716 juveniles/m 3) in aquaria (size: 46 x 23 x 23 cm) each containing 12 L freshwater. They reared on dry Tubifex tubifex worms and dry fish pellets for over 25 weeks. Growth and specific growth rates were inversely proportional to stocking density (P=0.0555, r=0.944; P=0.0395, r=0.960 respectively). At the highest stocking density (40 juveniles aquarium- 1), magnitude of decrease in daily growth was 51.21. Increase in stocking density resulted in reduction in size at maturity in both the sexes (male: 2 to 7.5; female: 1.37 to 5.57), reduction in fecundity (25 to 31), fry production (18.58 to 28.58) and inter-spawning interval (25 to 40). At a living space of 597 cm 3/fish (40 fish aquarium- 1), though males constructed the nest, females failed to spawn as post vitellogenic oocytes had become atretic and/or resorbed. © 2011 Academic Journals.

Item Type: Article
Additional Information: cited By 2
Uncontrolled Keywords: fresh water, animal food; article; breeding; female; fertility; fry (fish); fry production; growth curve; growth rate; male; nesting; nonhuman; oocyte; Oreochromis mossambicus; pisciculture; reproduction; sex ratio; sexual maturity; spawning; stocking density; survival; vitellogenesis; weight gain, Cichlidae; Oreochromis mossambicus; Tubifex tubifex
Subjects: Faculty of Science > Environmental and Biological Sciences > Zoology
Divisions: Jnana Bharathi / Central College Campus > Department of Zoology
Depositing User: Mr. Kirana Kumar D
Date Deposited: 29 Mar 2016 09:11
Last Modified: 29 Mar 2016 09:11
URI: http://eprints-bangaloreuniversity.in/id/eprint/2424

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