Although viral hemorrhagic septicemia virus (VHSV) is known to affect at least 28 species of Great Lakes fish, round gobies (Neogobius melanostomus) appear to be particularly affected. The first report of VHSV in New York State waters occurred in round gobies and in subsequent surveillance efforts a disproportionately high proportion of round gobies were infected with VHSV compared with other species tested. In this study, we tested the experimental susceptibility of round gobies to infection with VHSV in the laboratory, using naïve and previously exposed fish. Naïve fish were significantly more susceptible than previously exposed fish, however previously exposed fish experienced a mortality of 35% over 45. days suggesting that previous exposure did not result in complete protection. Field studies at two sites showed a significant change in prevalence over 10. weeks in the spring based on non-lethal fin and gill samples, suggesting that great care must be taken when interpreting prevalence from single sampling efforts during VHSV surveillance. There was no difference in the observed diversity of sequence types of virus from fish that tested positive during times of low or high prevalence, or during a confinement-induced laboratory epidemic. These results show that round gobies are experimentally susceptible to VHSV and that the field prevalence of VHSV in this species can vary greatly within a short period of time; these results also provide a preliminary exploration of the role round gobies may be playing in the dynamics of VHSV in the eastern Great Lakes and St. Lawrence River.
|Original language||English (US)|
|Number of pages||8|
|Journal||Journal of Great Lakes Research|
|State||Published - Dec 1 2014|
Bibliographical noteFunding Information:
We thank Geofrey Eckerlin for collection assistance and New York State for providing scientific collection permits as well as the New York State Department of Conservation. This work was supported by Cooperative Agreement 10-9100-1294-GR to Cornell University from USDA–APHIS . The use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.
© 2014 Elsevier B.V.
- Disease ecology
- Neogobius melanostomus
- Round goby
- Sequence diversity
- Viral hemorrhagic septicemia virus