North to Alaska: Evidence for conveyor belt transport of Dungeness crab larvae along the west coast of the United States and Canada
W. Park, D.C. Douglas, and T.C. Shirley
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Description
Dungeness crab (Cancer magister) larvae collected in southeastern Alaska in May and June 1997-2004 had abundances and stages that varied seasonally, interannually, and spatially. Buoy drift tracks support a hypothesis that larvae released off northern Washington and British Columbia during peak hatching can transport to southeastern Alaska, arriving as late-stage larvae in May and June when local larvae are only beginning to hatch. Northward spring isotherms and phytoplankton blooms also provide evidence that environmental conditions are conducive for larval growth and metabolism during the transport period. The proposed larval transport suggests possible unidirectional gene flow between southern and northern populations of Dungeness crabs in southeastern Alaska.
Limnology and Oceanography 52(1):248-256.Item details
- Item number: RP-07-01
- Year: 2007
- Pages: 9
