Effects of salinity on Bonamia sp. survival in the Asian oyster Crassostrea ariakensis

Corinne Audemard, Ryan B. Carnegie, Nancy A. Stokes, Melanie J. Bishop, Charles H. Peterson, Eugene M. Burreson

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A novel Bonamia sp. discovered in Bogue Sound, NC, has recently emerged as a parasitic threat to the Asian oyster Crassostrea ariakensis. Because this oyster is being considered for introduction to the mid-Atlantic region, more data are needed to better evaluate the risks associated with this parasite. Field observations collected from North Carolina and information on other Bonamia spp. suggest an affinity for higher salinities, and direct transmissibility; in the absence of explicit experimental tests, however, this is largely hypothetical. Consequently, we used laboratory trials to test the direct transmissibility and the persistence of Bonamia sp. in infected triploid C. ariakensis transferred to and maintained at three salinities, 10, 20, and 30 psu for at least 15 wk. Under these experimental conditions, there was no evidence of direct Bonamia sp. transmission. Average parasite intensity in infected oysters transferred to and maintained at 10 and 20 psu decreased compared with oysters placed at 30 psu. At the same time, host mortality was significantly reduced at salinities below 30 psu. These experimental results suggest that the survival of Bonamia sp. in C. ariakensis may be limited in mesohaline areas. The persistence, pathogenicity, and transmission of Bonamia sp. under polyhaline conditions will need to be further evaluated to better describe the geographic areas at risk in the event of C. ariakensis introduction.

LanguageEnglish
Pages535-540
Number of pages6
JournalJournal of Shellfish Research
Volume27
Issue number3
DOIs
Publication statusPublished - May 2008
Externally publishedYes

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Crassostrea ariakensis
oysters
salinity
persistence
parasite intensity
pathogenicity
Mid-Atlantic region
parasites
parasite
triploidy
mortality
testing
effect
test

Cite this

Audemard, Corinne ; Carnegie, Ryan B. ; Stokes, Nancy A. ; Bishop, Melanie J. ; Peterson, Charles H. ; Burreson, Eugene M. / Effects of salinity on Bonamia sp. survival in the Asian oyster Crassostrea ariakensis. In: Journal of Shellfish Research. 2008 ; Vol. 27, No. 3. pp. 535-540.
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Effects of salinity on Bonamia sp. survival in the Asian oyster Crassostrea ariakensis. / Audemard, Corinne; Carnegie, Ryan B.; Stokes, Nancy A.; Bishop, Melanie J.; Peterson, Charles H.; Burreson, Eugene M.

In: Journal of Shellfish Research, Vol. 27, No. 3, 05.2008, p. 535-540.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Peterson, Charles H.

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