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Environmental factors and chemical agents affecting the growth of the pathogenic marine ciliate Uronema nigricans

Citation

Crosbie, PBB and Munday, BL, Environmental factors and chemical agents affecting the growth of the pathogenic marine ciliate Uronema nigricans, Diseases of Aquatic Organisms, 36, (3) pp. 213-219. ISSN 0177-5103 (1999) [Refereed Article]

DOI: doi:10.3354/dao036213

Abstract

The scuticociliate Uronema nigricans is an opportunistically parasitic marine ciliate known to cause disease in some aquacultural environments with epizootics documented from marine larval rearing systems; marine aquaria and in southern bluefin tuna Thunnus macoyii growout enclosures. This study examined growth responses of laboratory cultures of the ciliate and prey bacteria to variations in temperature and salinity, and the efficacy of potential chemotherapeutants for control of U. nigricans infections. Differences in ciliate growth responses were marginal at temperatures of 10 to 25°C and at salinities between 15 and 35 ppt, though 3.5 ppt or less was lethal. Ciliates were found to be sensitive to fluctuations in bacterial densities, which may be a factor in the seasonal occurrence of the ciliate-related disease in tuna. Commonly used chemotherapeutants such as formalin, malachite green and hydrogen peroxide were all effective against the ciliate during in vitro trials.

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:Crosbie, PBB (Dr Philip Crosbie)
Author:Munday, BL (Dr Barry Munday)
ID Code:16669
Year Published:1999
Web of Science® Times Cited:20
Deposited By:TAFI - Aquaculture
Deposited On:1999-08-01
Last Modified:2011-08-05
Downloads:0

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