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The effect of salinity on transovarial transmission of a microsporidian infecting Gammarus duebeni

Dunn, A.M. and Hatcher, M.J. (1997) The effect of salinity on transovarial transmission of a microsporidian infecting Gammarus duebeni. Parasitology, 115 (4). pp. 381-385. ISSN 1469-8161


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This is an investigation of the impact of salinity on transovarial transmission and burden of a microsporidian sex ratio distorter in the inter-tidal crustacean Gammarus duebeni. Exposure of parasitized mothers to increased salinity during the gonotrophic cycle caused an increase in parasite burden in the follicle cells and a decrease in burden in the oocytes. It appears that salinity impedes parasite transmission from the follicle cells to the oocytes during host oogenesis. A lower proportion of the young were infected in broods from elevated salinity and, in infected offspring, parasite burden was lower than in control embryos. Parasite replication occurred during embryogenesis. However, the pattern of parasite growth did not differ between salinities, indicating that differences in parasite burden could be attributed to a reduction in the initial parasite burden transmitted to the gamete, rather than to a reduction in parasite replication during host embryogenesis. We discuss our findings with respect to parasite/host dynamics and the ecology of the host.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 1997 Cambridge University Press.
Keywords: microsporidian, salinity, parasite burden, transovarial transmission, Gammarus duebeni
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Biological Sciences (Leeds) > Institute of Integrative and Comparative Biology (Leeds)
Depositing User: Repository Officer
Date Deposited: 14 Mar 2006
Last Modified: 05 Jun 2014 17:23
Published Version: http://dx.doi.org/10.1017/S0031182097001492
Status: Published
Refereed: Yes
Identification Number: 10.1017/S0031182097001492
URI: http://eprints.whiterose.ac.uk/id/eprint/1009

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