Preliminary studies on the conversion of Tubifex tubifex as food by elvers of Anguilla nebulosa (Gray and Hardwicke)

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Ravichandra Reddy, S. and Katre Shakuntala, . and Karthikan Rajagopal, . (1977) Preliminary studies on the conversion of Tubifex tubifex as food by elvers of Anguilla nebulosa (Gray and Hardwicke). Journal of Fish Biology, 11 (3). pp. 279-281. ISSN 1095-8649

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Official URL: http://doi.org/10.1111/j.1095-8649.1977.tb04121.x

Abstract

Elvers of Anguilla nebulosa were reared at 23°C in confined waters and their food intake, growth and conversion efficiency (K1:%) were studied. Elvers weighing 278.33±14.35 mg were fed on an ad libitum diet of the oligochaete worm Tubifex tubifex for 60 days. On an average, the test individuals consumed 99.55±19.81 mg food/elver/day amounting to 35.76% of the initial biomass; during the corresponding period the elvers exhibited a growth rate of 5.03±2.42 mg gain in weight/elver/day which is equivalent to 5.06% of the consumed food. Thus the ‘housekeeping’ of these elvers may be regarded as established. In 50 days, the food required amounts to 0.358±50 = 17.90 times the initially stocked biomass. That is, 1 kg of initially stocked elvers may need 17.90 kg of T. tubifex to produce 0.912 kg of elver meat. A poor conversion ratio of 20 : 1 may be one reason for the slow growth of the elvers.

Item Type: Article
Subjects: Faculty of Science > Environmental and Biological Sciences > Zoology
Divisions: Jnana Bharathi / Central College Campus > Department of Zoology
Depositing User: Mr. Lokeshareddy Y C
Date Deposited: 08 Nov 2016 08:54
Last Modified: 08 Nov 2016 08:54
URI: http://eprints-bangaloreuniversity.in/id/eprint/7319

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