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JPR Advance Access published online on December 22, 2004
Journal of Plankton Research, doi:10.1093/plankt/fbh168
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Journal of Plankton Research, © Oxford University Press 2004; all rights reserved
Received May 13, 2004
Accepted December 6, 2004

Article

Do Viruses Affect Fecundity and Survival of the Copepod Acartia tonsa Dana?

Lisa A. Drake 1* and Fred C. Dobbs 1

1 Department of Ocean, Earth and Atmospheric Sciences, Old Dominion University, 4600 Elkhorn Avenue, Norfolk, VA 23529, USA

* To whom correspondence should be addressed.
Lisa A. Drake, E-mail: ldrake{at}odu.edu


  Abstract

Naturally occurring viruses are extremely abundant in aquatic systems, and they infect bacteria, cyanobacteria, prokaryotic and eukaryotic phytoplankton, heterotrophic nanoflagellates, fish, and mammals. Viral infections of single-celled organisms have been studied intensively in the past decade, but little is known about the effects of viruses on aquatic metazoans, other than for some economically important species. Because zooplankton assemblages are often dominated in number and biomass by copepods, we used them as model organisms to study the effects of naturally occurring viruses on higher trophic levels. We attempted to induce viral infection in laboratory-reared cultures of the estuarine copepod Acartia tonsa Dana by exposing them to elevated concentrations of natural viruses in seawater. We found no negative effects of such exposure on copepod fecundity, larval survival, or adult survival.


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