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Utilization of Seagrass Habitat by the Blue Crab, Callinectes sapidus Rathbun, in Chesapeake Bay: A Review
Orth, Robert J. Van Montfrans, Jacques Lipcius, Romuald N. Metcalf, Karen S.
Orth, Robert J.
Van Montfrans, Jacques
Lipcius, Romuald N.
Metcalf, Karen S.
Abstract
Seagrasses are generally presumed to provide important habitats for numerous species of vertebrates and invertebrates, serving as a nursery, structure for attachment, or foraging area. However, few species appear directly dependent on seagrass, one notable exception being the bay scallop, Argopecten irradians Lamarck. Research in Chesapeake Bay on the abundant, and commercially exploitable blue crab, Callinectes sapidus Rathbun, over the last decade, focused on the relevance of seagrass habitat for the overall population. Our research has demonstrated: I. higher densities of juvenile blue crabs in seagrass habitats compared to adjacent marsh and unvegetated areas, 2. seagrasses to be an important settlement habitat for recruiting post-larval blue crabs, and 3. mediated predatorprey interactions related to seagrass abundance and increasing crab size. Our current research focuses on the importance of restored areas for blue crab survival and relevance of seagrass habitat baywide in the context of landscape distributional patterns and metapopulation dynamics. Our findings suggest that similar habitats may differentially affect the numerical abundance of juvenile blue crabs. Elucidating the mechanistic reasons for the value of seagrass habitat for blue crabs, one of the last remaining, viable commercial fisheries in Chesapeake Bay, will be crucial in developing strategies for protecting and restoring seagrass habitat in Chesapeake Bay.
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Date
1996
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Faculty of Sciences, The University of Western Australia
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VIMS Books and Book Chapters, Seagrass, habitat, blue crab, Callinectes sapidus, nursery
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Virginia Institute of Marine Science