Host-parasite interactions among broadly distributed populations of the eastern oyster Crassostrea virginica and the protozoan Perkinsus marinus

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dc.acquisition-srcDownloaded from-Aquatic Sciences and Fisheries Abstractsen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorBushek Den_US
dc.contributor.authorAllen S Jren_US
dc.contributor.otherMarine ecology progress seriesen_US
dc.date.accessioned2010-02-15T17:13:53Z
dc.date.available2010-02-15T17:13:53Z
dc.date.issued1996en_US
dc.degreeen_US
dc.description127-141en_US
dc.description-otheren_US
dc.description.abstractThe protozoan oyster parasite Perkinsus marinus causes extensive mortality in eastern oyster (Crassostrea virginica) populations during summer and fall across much of the oyster's distribution. Despite more than 40 yr of research on this particular parasite, no study has unequivocally demonstrated a genetic basis for host resistance to P. marinus nor has it been determined whether or not there are races of P. marinus that vary in virulence. Using recently developed techniques to culture P. marinus in vitro, we examined the resistance of 4 genetically distinct oyster populations that had different natural histories of exposure to P. marinus and the virulence of 4 geographically distinct isolates of P. marinus. Offspring were produced from each oyster population and reared in a common environment, then exposed to each isolate of P. marinus. Oysters showed levels of resistance roughly corresponding to the duration parental populations had been exposed to P. marinus (Texas > Virginia > New Jersey = Maine), indicating that those populations which have been exposed to P. marinus for more than 40 yr have developed some resistance. Parasites isolated from the Atlantic coast (Mobjack Bay, VA and Delaware Bay, NJ, USA) produced heavier infections than those isolated from the Gulf of Mexico coast (Barataria Bay, LA and South Bay Laguna Madre, TX, USA), indicating that Atlantic isolates were more virulent than Gulf isolates. These data indicate that resistant races of the eastern oyster exist, and imply the existence of virulent parasite races. No statistically significant interaction was detected between oyster populations and parasite isolates. Relative infection intensities among oyster populations remained more or less constant across parasite isolates and vice versa. The lack of a significant interaction between host populations and parasite isolates indicated that mechanisms of resistance and virulence were general, not race-specificen_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23000
dc.latitudeen_US
dc.locationen_US
dc.longitudeen_US
dc.notes0171-8630Incl. bibliogr.: 89 refsEnglishEnglishJournal ArticleMarineBF9701488en_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries50525.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectANW,USA,Maine,Damariscotta R.en_US
dc.subjectANW,USA,New Jersey,Delaware Bayen_US
dc.subjectANW,USA,Virginia,Mobjack Bayen_US
dc.subjectASW,USA,Texas,Galveston Bayen_US
dc.subjectCrassostreaen_US
dc.subjectCrassostrea virginicaen_US
dc.subjectDisease resistanceen_US
dc.subjectDistributionen_US
dc.subjectEastern oysteren_US
dc.subjectGenetic driften_US
dc.subjectGenotypesen_US
dc.subjectHostsen_US
dc.subjectinterspecific relationshipsen_US
dc.subjectLaboratoriesen_US
dc.subjectMarine molluscsen_US
dc.subjectMortalityen_US
dc.subjectMortality causesen_US
dc.subjectO 1070 Ecology/Community Studiesen_US
dc.subjectO 5060 Aquacultureen_US
dc.subjectOyster cultureen_US
dc.subjectOystersen_US
dc.subjectparasitesen_US
dc.subjectParasitic diseasesen_US
dc.subjectPerkinsus marinusen_US
dc.subjectPopulation structureen_US
dc.subjectPopulationsen_US
dc.subjectprotozoan diseasesen_US
dc.subjectQ1 01443 Population geneticsen_US
dc.subjectQ1 01484 Species interactions: parasites and diseasesen_US
dc.subjectQ1 01583 Shellfish cultureen_US
dc.subjectQ3 01587 Diseases of Cultured Organismsen_US
dc.subjectSpawning seasonsen_US
dc.subjectTexasen_US
dc.subjectUSAen_US
dc.subjectvariance analysisen_US
dc.subjectVirulenceen_US
dc.titleHost-parasite interactions among broadly distributed populations of the eastern oyster Crassostrea virginica and the protozoan Perkinsus marinusen_US
dc.typeJournalen_US
dc.universityen_US
dc.vol-issue(1-3)en_US

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