Food availability to natural oyster populations: Food, flow and flux

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dc.acquisition-srcDownloaded from-Aquatic Sciences and Fisheries Abstractsen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorWilson-Ormond Een_US
dc.contributor.authorPowell ENen_US
dc.contributor.authorHofmann EEen_US
dc.contributor.authorKlinck JMen_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:14:05Z
dc.date.available2010-02-15T17:14:05Z
dc.date.issued1993 2003 May 31en_US
dc.degreeen_US
dc.description-en_US
dc.description-otheren_US
dc.description.abstractFood availability to natural oyster (Crassostrea virginica) populations is dependent upon the quantity of food present, water flow speed, and oyster density. Field experiments were conducted (Confederate Reef, Galveston Bay, TX) to determine the temporal variability in the food concentration and water flow speed on scales consistent with oyster feeding. Results indicate that the amount of food (mg/l) available to the population is highly variable on temporal scales as short as 3 hr. Water flow speeds (cm/s) are also quite variable, however, they tend to cluster about a narrow range of slower speeds. The resultant food fluxes (mg cm super(-2)/s) indicate that natural populations experience a highly variable food supply. Rapid water flow can compensate for low food concentration by resulting in an overall higher flux of food, while slow flow typically results in low flux regardless of the concentration of food. These results suggest that in some cases, water flow speed is more important than food concentration in determining the amount of food available to the population. A mathematical model of oyster energetics was employed to further assess the role of water flow in determining productivity in natural oyster populations. Simulation results suggest that oyster productivity is higher under conditions of rapid flow because of increased food availability due to a higher flux of food particles. Slower water flow can result in food depletion due to overfiltration and can ultimately reduce productivity. Productivity was better estimated in simulations using the variable food supply as compared to the average food supply. The latter consistently overestimated productivity. Therefore, the short-term temporal variability in available food is an important factor affecting oyster feeding and productivityen_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23028
dc.latitudeen_US
dc.locationen_US
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dc.notes85. Annu. Meet. Natl. Shellfisheries Association, Portland, OR (USA)0730-8000Abstract onlyEnglishJournal Article; Conference; SummaryMarineCS9408445en_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries50568.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesJournal of Shellfish Research [J. SHELLFISH RES.]en_US
dc.subjectASW,USA,Texas,Galveston Bayen_US
dc.subjectbiological productionen_US
dc.subjectCrassostreaen_US
dc.subjectCrassostrea virginicaen_US
dc.subjectCurrent velocityen_US
dc.subjectFilter feedersen_US
dc.subjectfood availabilityen_US
dc.subjectGalveston Bayen_US
dc.subjectMathematicalen_US
dc.subjectnatural populationsen_US
dc.subjectPopulationsen_US
dc.subjectQ1 01264 Reproduction and developmenten_US
dc.subjectQ1 01422 Environmental effectsen_US
dc.subjectQ1 01482 Ecosystems and energeticsen_US
dc.subjectQ1 01583 Shellfish cultureen_US
dc.subjectQ3 01583 Shellfish cultureen_US
dc.subjectShellfishen_US
dc.subjectsimulationen_US
dc.subjecttemporal variationsen_US
dc.subjectTexasen_US
dc.subjectUSAen_US
dc.subjectVariabilityen_US
dc.subjectwateren_US
dc.subjectWater currentsen_US
dc.titleFood availability to natural oyster populations: Food, flow and fluxen_US
dc.typeCONFen_US
dc.universityen_US
dc.vol-issue()en_US

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