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Influence of Parasitism on the Successful Establishment of AlienSpecies: Case of the Round Goby

The primary objective of this research project is to determine   whether  the Round Goby (Neogobius melanostomus), an invasive alien species  accidentally introduced into the Great Lakes - St. Lawrence system in  the early 199 s, has brought with it foreign parasites that could  affect the health of the host ecosystem. A second objective is to  clarify the genetic identity of goby populations recently established  in the St. Lawrence River. Did they originate from the dispersion of  gobys already established in the Great Lakes, or were they newly  introduced via the ballast water of ocean vessels? If the species  recent presence in the river is the result of new arrivals from  Eastern Europe, and if these escapes continue, there is a higher risk  of introducing foreign parasites. Finally, scientists will compare   the  degree of parasitic infection of Round Gobys with that of native fish  occupying the same ecological niche so as to verify the hypothesis  that alien species shed a large proportion of their parasites when  they integrate into a new environment, giving them an advantage over  other species and initially facilitating their establishment in the  host environment.    (Round Goby); (Neogobius melanostomus); (AIS); (aquatic invasive  species); (ANS); (aquatic nuisance species); (St. Lawrence River);  (parasite); (parasites); (disease); (diseases); (genetic);   (genetics);  

In progress
Start Date
End Date
Scope of Study
Field Investigation
Laboratory Investigation
Scale of Phenomena
Impact of Pollutants
Exotic Species
Resource Management
Lake Basin Connecting Channels
St.Lawrence River
State Province
Region Being Monitored
Tributary Mouth
Resource Being Monitored
Beneficial Use Impairment Assessments
Compliance with Environmental Quality Objectives
Tainting of Fish and Wildlife Populations
Biology And Life History
Parasites and Diseases
Annex Numbers
Research & Development
Annex 17
Impact of water quality and AIS on fish and wildlife populations and habitats
  • Annex Numbers
    Annex Numbers
    Research & Development
  • Annex 17
    Annex 17
    Impact of water quality and AIS on fish and wildlife populations and habitats

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