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Free Content Abundance Patterns of Juvenile Blue Crabs (Callinectes Sapidus) in Nursery Habitats of Two Texas Bays

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Abstract:

In Christmas Bay, Texas, monthly densities of juvenile blue crabs, smaller than 40 mm carapace width, were highest in seagrass (2.8 to 50.6⋅m–2), intermediate in salt marsh (1.3 to 22.1⋅m–2) and lowest on bare sand (0.6 to 5.6⋅m–2). In West Bay, Texas, where seagrasses were absent, crab densities were intermediate in salt marsh (2.2 to 13.0⋅m–2) to low on bare mud (0.1 to 1.7⋅m–2). The lowest seasonal abundances occurred in the early spring after juvenile crabs overwintered on subtidal sand and mud. The highest abundances and smallest mean sizes occurred in the late summer and fall corresponding to seasonal recruitment. Crabs were larger in mean size in salt marsh than in seagrass or nonvegetated habitats. Although seagrasses are often the preferred nursery of Callinectes sapidus, seagrasses occur infrequently in the NW Gulf and salt marshes are used as an additional nursery. Features that increase utilization of salt marshes in the NW Gulf compared to other regions are reticulated marsh geomorphology, low tidal amplitude and long periods of tidal inundation.

Document Type: Research Article

Publication date: January 1, 1990

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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