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An epizootic and its decline of a blood fluke, Cardicola forsteri in farmed southern bluefin tuna, Thunnus maccoyii

Citation

Aiken, H and Hayward, CJ and Nowak, BF, An epizootic and its decline of a blood fluke, Cardicola forsteri in farmed southern bluefin tuna, Thunnus maccoyii, Aquaculture, 254, (1-4) pp. 40-45. ISSN 0044-8486 (2006) [Refereed Article]

DOI: doi:10.1016/j.aquaculture.2005.10.013

Abstract

The epidemiology of a blood fluke, Cardicola forsteri, was examined in cultured southern bluefin tuna, Thunnus maccoyii, over a 6-month grow-out season in Port Lincoln, South Australia. Ten tuna were sampled during the transfer from tow cages to sea cages in March, and then ten tuna from each cage once a month until August. A total of 210 tuna were sampled. Intensities and prevalences were found to increase rapidly and peak 2 months after transfer with 100% prevalence and an overall average of 27 flukes per infected tuna (S.E. = 3.91), with one tuna having a recorded 99 worms in its heart. After this peak, both prevalence and intensity declined to an average of 3.1 flukes per infected tuna (S.E. = 0.88) and a prevalence of 35%. Condition Indices, calculated from weights and lengths and used as a measure of production, were shown to have no significant relationship with intensity or prevalence. It is concluded that T. maccoyii is able to control blood fluke infection, despite decreasing water temperatures. © 2005 Elsevier B.V. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
Author:Aiken, H (Mr Hamish Aiken)
Author:Hayward, CJ (Dr Craig Hayward)
Author:Nowak, BF (Professor Barbara Nowak)
ID Code:39393
Year Published:2006
Web of Science® Times Cited:36
Deposited By:TAFI - Aquaculture
Deposited On:2006-08-01
Last Modified:2011-09-20
Downloads:0

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