The invasion of Hemigrapsus sanguineus (Asian Shore Crab) has been of concern in northeastern North America since the late 1980s. A relatively long-term record (1998–2011) of density estimates in southern New England showed displacement of resident crab species at 3 locations in Massachusetts and Rhode Island. In 2016, I visited the same locations to estimate current crab densities. The springtime Asian Shore Crab density decreased at a coastal location, but increased at an estuarine location to >300 crabs/m2. Resident crabs Carcinus maenas (European Green Crab) and Mud Crabs in the family Panopeidae increased in abundance at all 3 locations.
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1 May 2018
Changes in Population Sizes of Hemigrapsus sanguineus (Asian Shore Crab) and Resident Crab Species in Southeastern New England (2010–2016)
Nancy J. O'Connor
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Northeastern Naturalist
Vol. 25 • No. 2
May 2018
Vol. 25 • No. 2
May 2018