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Safe usage of antibiotic (Oxytetracycline) in larval rearing of mud crab, Scylla serrata (Forsskål, 1775) in Fiji

Azam, Khairul and Narayan, Prashant (2013) Safe usage of antibiotic (Oxytetracycline) in larval rearing of mud crab, Scylla serrata (Forsskål, 1775) in Fiji. World Journal of Fish and Marine Sciences, 5 (2). pp. 209-213. ISSN 2078-4589

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The mud crab aquaculture industry has found much success by the use of antibiotics such as oxytetracycline (OTC) to increase yield from larval rearing, but there needs to be a control in its usage to avoid the bacterial resistance to the drug. Therefore this research was carried out to assess the safe usage of oxytetracycline in mud crab larvae rearing process in Fiji. The experiment was done to assess the optimal concentration and duration of the use of oxytetracycline. Four treatments were tested in two runs (10ppm and 25ppm); OTC used from zoea1 to zoea 2, OTC from zoea1 to zoea 3, OTC from zoea1 to zoea 4 and a control (without OTC). Results concluded that the use of OTC made significant differences (P 0.05) in the survival rate (%) of larvae in comparison to control. OTC usage till zoea 2 and at 25ppm indicated better growth rate while the extended use of OTC till zoea 4 gave a lower percentage yield of megalopae. The bacteria leading to mass mortality from zoea1-zoea 2 coincided with rotifer feeding to the larvae, while the slow growth rate from the extended OTC use may have been be due to the emergence of antibiotic resistant bacteria which slowed the larval growth.

Item Type: Journal Article
Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling
Divisions: Faculty of Science, Technology and Environment (FSTE)
Depositing User: Unnamed user with email
Date Deposited: 19 Dec 2013 23:33
Last Modified: 13 Jun 2016 04:29

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