Round gobies are an important part of VHSV genotype IVb ecology in the St. Lawrence River and eastern Lake Ontario

Emily R. Cornwell, Alexander E Primus, Po Ting Wong, Gregory B. Anderson, Tarin M. Thompson, Gael Kurath, Geoffrey H. Groocock, Mark B. Bain, Paul R. Bowser, Rodman G. Getchell

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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 languageEnglish (US)
Pages (from-to)1002-1009
Number of pages8
JournalJournal of Great Lakes Research
Volume40
Issue number4
DOIs
StatePublished - Dec 1 2014

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Saint Lawrence River
Viral hemorrhagic septicemia virus
Lake Ontario
virus
genotype
ecology
lake
river
fish
Great Lakes
Neogobius melanostomus
monitoring
fins
gills
sampling
viruses

Keywords

  • Disease ecology
  • Neogobius melanostomus
  • Round goby
  • Sequence diversity
  • Viral hemorrhagic septicemia virus

Cite this

Round gobies are an important part of VHSV genotype IVb ecology in the St. Lawrence River and eastern Lake Ontario. / Cornwell, Emily R.; Primus, Alexander E; Wong, Po Ting; Anderson, Gregory B.; Thompson, Tarin M.; Kurath, Gael; Groocock, Geoffrey H.; Bain, Mark B.; Bowser, Paul R.; Getchell, Rodman G.

In: Journal of Great Lakes Research, Vol. 40, No. 4, 01.12.2014, p. 1002-1009.

Research output: Contribution to journalArticle

Cornwell, ER, Primus, AE, Wong, PT, Anderson, GB, Thompson, TM, Kurath, G, Groocock, GH, Bain, MB, Bowser, PR & Getchell, RG 2014, 'Round gobies are an important part of VHSV genotype IVb ecology in the St. Lawrence River and eastern Lake Ontario', Journal of Great Lakes Research, vol. 40, no. 4, pp. 1002-1009. https://doi.org/10.1016/j.jglr.2014.09.006
Cornwell, Emily R. ; Primus, Alexander E ; Wong, Po Ting ; Anderson, Gregory B. ; Thompson, Tarin M. ; Kurath, Gael ; Groocock, Geoffrey H. ; Bain, Mark B. ; Bowser, Paul R. ; Getchell, Rodman G. / Round gobies are an important part of VHSV genotype IVb ecology in the St. Lawrence River and eastern Lake Ontario. In: Journal of Great Lakes Research. 2014 ; Vol. 40, No. 4. pp. 1002-1009.
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AU - Cornwell, Emily R.

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AU - Wong, Po Ting

AU - Anderson, Gregory B.

AU - Thompson, Tarin M.

AU - Kurath, Gael

AU - Groocock, Geoffrey H.

AU - Bain, Mark B.

AU - Bowser, Paul R.

AU - Getchell, Rodman G.

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AB - 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.

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