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Biol Bull 119: 550-559. (December 1960)
© 1960 Marine Biological Laboratory
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THE SEASONAL OCCURRENCE OF MYTILUS EDULIS ON THE CAROLINA COAST AS A RESULT OF TRANSPORT AROUND CAPE HATTERAS

HARRY W. WELLS 1 and I. E. GRAY 1

1 Department of Zoology, Duke University, Durham, North Carolina

Although Mytilus edulis survives year-round north of Cape Hatteras, summer water temperatures are high enough to kill it south of that point. Populations of this species in the Carolinian subprovince are apparently maintained by an external source of larvae. Larvae can be transported around Cape Hatteras by southward movements of Virginian Coastal water that result from persistent strong northeast winds in late fall. The presence and abundance of M. edulis at Beaufort has been correlated with the abundance and severity of northeast storms occurring in the Cape Hatteras region during the preceding fall, over a five-year period. Probably other northern species owe their sporadic appearance in the Beaufort area to similar transport of larvae by southward water movements.






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