The spatial distribution of Perkinsus marinus, a protozoan parasite, in relation to its oyster host (Crassostrea virginica) and an ectoparasitic gastropod (Boonea impressa).

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dc.acquisition-srcen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorWhite, M.E.en_US
dc.contributor.authorPowell, E.N.en_US
dc.contributor.authorWilson, E.A.en_US
dc.contributor.authorRay, S.M.en_US
dc.contributor.otherJournal of the Marine Biological Association of the United Kingdom.en_US
dc.date.accessioned2010-02-15T16:56:52Z
dc.date.available2010-02-15T16:56:52Z
dc.date.issued1989en_US
dc.degreeen_US
dc.descriptionp. 703-717.en_US
dc.description-otheren_US
dc.description.abstractThe endoparasitic protozoan Perkinsus (=Dermocystidium) marinus is a major cause of oyster mortality in the Gulf of Mexico. The small-scale spatial distribution of P. marinus, its oyster host, and a second oyster parasite, the ectoparasitic snail Boonea impressa, was examined on two oyster reefs in Aransas Bay, Texas. Large oysters (>5 cm long) were infected 3 to 4 times as frequently by P. marinus as smaller oysters on both reefs. In both cases, infected oysters were less contagiously distributed (lower variance/ mean) than the entire oyster population, being most similar to the distribution of large oysters where most infections were found. In both cases the spatial distribution of infected oysters, when different, was more nearly random than the distributions of the oyster or snail populations. The distribution of large Boonea impressa explained the distribution of infected oysters better than any other parameter measured. B. impressa transmits P. marinus and feeding by B. impressa increases infection intensity in infected oysters. Hence the influence of snail parasitism on P. marinus prevalence and infection intensity, in large measure, determined the distribution of P. marinus on these reefs. Since P. marinus is estimated to be responsible for over half of all mortality in market-size oysters, the distribution of snail patches may play an important role in the distribution of mortality in some oyster populations.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeNorthwestern Gulf of Mexicoen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/20302
dc.latitudeen_US
dc.locationTAMUG periodical collectionen_US
dc.longitudeen_US
dc.notesen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries2513.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectoystersen_US
dc.subjectCrassostrea virginicaen_US
dc.subjectPerkinsus marinusen_US
dc.subjectBoonea impressaen_US
dc.subjectparasitesen_US
dc.subjectendoparasitesen_US
dc.subjectectoparasitesen_US
dc.titleThe spatial distribution of Perkinsus marinus, a protozoan parasite, in relation to its oyster host (Crassostrea virginica) and an ectoparasitic gastropod (Boonea impressa).en_US
dc.typeArticleen_US
dc.universityen_US
dc.vol-issue69en_US

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