Field validation of a habitat suitability index model for the American oyster




Soniat TM
Brody MS

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A habitat suitability index (HSI) model, developed for the American oyster, Crassostrea virginica , along the Gulf of Mexico, was field tested on 38 0.1-ha reef and nonreef sites in Galveston Bay, Texas. The HSI depends upon six (HSI1) or, optionally, eight (HSI2) variables. The six variables are percent of bottom covered with suitable cultch (V sub(1)), mean summer water salinity (V sub(2)), mean abundance of living oysters (V sub(3)) (a gregarious settling factor), historic mean water salinity (V sub(4)), frequency of killing floods (V sub(5)), and substrate firmness (V sub(6)). The optional variables are the abundance of the southern oyster drill Thais haemostoma) (V sub(7)), and the intensity of the oyster pathogen Perkinsus marinus) (V sub(8)). The HSI values were lowest at high and low salinity sites and highest at intermediate-salinity sites




abundance, ASW,Galveston Bay, Crassostrea, Crassostrea virginica, D 04003 Modeling,mathematics,computer applications, D 04658 Molluscs, environmental factors, Fishery oceanography, Floods, Galveston Bay, Gulf of Mexico, habitat, Habitat selection, habitat suitability index, Habitat utilization, models, O 5020 FISHERIES,FISHERY BIOLOGY,FISHING, oyster fisheries, Oysters, Perkinsus marinus, Q1 01567 Fishery oceanography and limnology, Q3 01583 Shellfish culture, Salinity, Texas, Thais haemostoma, USA, USA,Texas,Galveston Bay, water, Water salinity