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Colonization of the Laurentian Great Lakes by the amphipod Gammarus tigrinus, a native of the North American Atlantic Coast
Grigorovich, I.A.; Kang, M.; Ciborowski, J.J.H. (2005). Colonization of the Laurentian Great Lakes by the amphipod Gammarus tigrinus, a native of the North American Atlantic Coast. J. Great Lakes Res. 31(3): 333-342. dx.doi.org/10.1016/S0380-1330(05)70264-1
In: Journal of Great Lakes Research. IAGLR/International Association for Great Lakes Research: Buffalo. ISSN 0380-1330, more
Peer reviewed article  

Available in Authors 

Keywords
    Introduced species; Nekton; Amphipoda [WoRMS]; Typha; North America, Great Lakes [Marine Regions]
Author keywords
    Typha beds

Authors  Top 
  • Grigorovich, I.A.
  • Kang, M.
  • Ciborowski, J.J.H.

Abstract
    Gammarus tigrinus, whose natural distribution is restricted to the North American Atlantic coast, has been found at numerous localities across the Laurentian Great Lakes. This amphipod was first discovered in Saginaw Bay of Lake Huron in 2002. However, analysis of archived samples and new material collected during 2001–2004 revealed that G. tigrinus is present in all of the Great Lakes. During August 2002, it occurred at an average density of 283 individuals·m-2 in Saginaw Bay, where it was outnumbered by the resident amphipods G. fasciatus and Hyalella azteca. In terms of frequency of occurrence, G. tigrinus was the second most numerous amphipod in beds of Typha in lower Great Lakes coastal wetlands during July 2004, being outnumbered only by native G. pseudolimnaeus. Gammarus tigrinus has a history of ballast water transfer in Europe and it likely exploited this transport vector during its recent colonization of the Great Lakes.

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