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Climate-Related Hydrological Regimes And Their Effects On Abundance Of Juvenile Blue Crabs (Callinectes Sapidus) In The Northcentral Gulf Of Mexico
Sanchez-Rubio, Guillermo Perry, Harriet M. Biesiot, Patricia M. Johnson, Donald R. Lipcius, Rom
Sanchez-Rubio, Guillermo
Perry, Harriet M.
Biesiot, Patricia M.
Johnson, Donald R.
Lipcius, Rom
Abstract
The abundance of juvenile blue crabs (Callinectes sapidus) in the northcentral Gulf of Mexico was investigated in response to climate-related hydrological regimes. Two distinct periods of blue crab abundance (1, 1973-94 and 2, 1997-2005) were associated with two opposite climate-related hydrological regimes. Period 1 was characterized by high numbers of crabs, whereas period 2 was characterized by low numbers of crabs. The cold phase of the Atlantic Multidecadal Oscillation (AMO) and high north-south wind momentum were associated with period 1. Hydrological conditions associated with phases of the AMO and North Atlantic Oscillation (NAO) in conjunction with the north-south wind momentum may favor blue crab productivity by influencing blue crab predation dynamics through the exclusion of predators. About 25% (22-28%) of the variability in blue crab abundance was explained by a north south wind momentum in concert with either salinity, precipitation, or the Palmer drought severity index, or by a combination of the NAO and precipitation.
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2011-01-01
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Fisheries Science Peer-Reviewed Articles, Mississippi Sound; Habitat Selection; Northern Gulf; Salt Marshes; Nekton Use; Louisiana; Usa; Predation; Megalopae; Fishery
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Virginia Institute of Marine Science