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dc.contributor.authorMinello, T.J.en_US
dc.contributor.authorZimmerman, R.J.en_US
dc.contributor.authorMartinez, E.X.en_US
dc.contributor.otherTransactions of the American Fisheries Society.en_US
dc.date.accessioned2010-02-15T16:59:11Z
dc.date.available2010-02-15T16:59:11Z
dc.date.issued1989en_US
dc.identifier.urihttp://hdl.handle.net/1969.3/20702
dc.descriptionp.693-708.en_US
dc.description.abstractWe estimated actual 2-week mortalities of postlarval and juvenile brown shrimp in a Galveston Bay salt marsh by comparing densities of cohorts throughout the spring. Mortalities ranged between 33% and 61% in 1982 and 23% and 39 % in 1987. Brown shrimp mortality in predator-exclusion cages during 1987 was less than 3%. These data and published information on food requirements, diseases and physical tolerances suggest that predation is usually the major direct cause of brown shrimp mortality in estuarine nurseries of the northern Gulf of Mexico. Southern flounder Paralichthyes lethostigma was the dominant fish predator on brown shrimp during the spring, and appeared to be responsible for a large portion of brown shrimp mortality. In laboratory experiments, the presence of smooth cordgrass Spartina alterniflora reduced predation rates of southern flounder and some of the other fish predators examined. Predation rates in general increased in proportion to increased prey densities. Thus, low water levels in the marsh, which reduce access by brown shrimp to intertidal vegetation and increase their densities on nonvegetated bottom, probably result in increased brown shrimp mortality. Mortality and growth may also intract, and predation pressure should be reduced as brown shrimp mortality. Mortality and growth may also interact, and predation pressure should be reduced as brown shrimp grow and exceed optimal prey size. Indeed, mortality in the marsh appeared to decline as brown shrimp size increased.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.publisheren_US
dc.relation.ispartofseries2898.00en_US
dc.relation.urien_US
dc.subjectPenaeus aztecusen_US
dc.subjectbrown shrimpen_US
dc.subjectmortalityen_US
dc.subjectparalichthys lethostigmaen_US
dc.subjectsouthern flounderen_US
dc.subjectSpartina alternifloraen_US
dc.subjectgrowthen_US
dc.titleMortality of young brown shrimp Penaeus aztecus in estuarine nurseries.en_US
dc.typeArticleen_US
dc.placeen_US
dc.seriesen_US
dc.vol-issue118en_US
dc.geo-codeGalveston Bayen_US
dc.geo-codeNorthwestern Gulf of Mexicoen_US
dc.locationGalveston Bay Collection; TAMUG periodical collectionen_US
dc.scaleen_US
dc.latitudeen_US
dc.longitudeen_US
dc.contract-noen_US
dc.notesen_US
dc.degreeen_US
dc.acquisition-srcen_US
dc.description-otheren_US
dc.universityen_US
dc.historyen_US
dc.call-noAcc# 2898en_US


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