Dual disease resistance in a selectively bred eastern oyster, Crassostrea virginica, strain tested in Chesapeake Bay

Calvo, Lisa M. Ragone; Calvo, Gustavo W.; Burreson, Eugene M.

doi:10.1016/s0044-8486(02)00399-x

Cited by 115 publications

(37 citation statements)

References 3 publications

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“…The development of disease resistance has been investigated in oysters infected with protistan and viral pathogens. After four generations of selection beginning with American oyster Crassostrea virginica broodstock that had survived disease pressure from two protistan pathogens for 2–5 years, cumulative survival more than doubled when exposed to the protists (Calvo et al, 2003) illustrating the development of resistance over time. Resistance in populations has also been observed in Pacific oysters Crassostrea gigas after several generations of selection to a herpes virus (ostreid herpesvirus-1); heritability of traits was also high (e.g., h 2 = 0.61–0.95; Dégremont et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Reduced disease in black abalone following mass mortality: phage therapy and natural selection

et al. 2014

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Black abalone, Haliotis cracherodii, populations along the NE Pacific ocean have declined due to the rickettsial disease withering syndrome (WS). Natural recovery on San Nicolas Island (SNI) of Southern California suggested the development of resistance in island populations. Experimental challenges in one treatment demonstrated that progeny of disease-selected black abalone from SNI survived better than did those from naïve black abalone from Carmel Point in mainland coastal central California. Unexpectedly, the presence of a newly observed bacteriophage infecting the WS rickettsia (WS-RLO) had strong effects on the survival of infected abalone. Specifically, presence of phage-infected RLO (RLOv) reduced the host response to infection, RLO infection loads, and associated mortality. These data suggest that the black abalone: WS-RLO relationship is evolving through dual host mechanisms of resistance to RLO infection in the digestive gland via tolerance to infection in the primary target tissue (the post-esophagus) coupled with reduced pathogenicity of the WS-RLO by phage infection, which effectively reduces the infection load in the primary target tissue by half. Sea surface temperature patterns off southern California, associated with a recent hiatus in global-scale ocean warming, do not appear to be a sufficient explanation for survival patterns in SNI black abalone. These data highlight the potential for natural recovery of abalone populations over time and that further understanding of mechanisms governing host–parasite relationships will better enable us to manage declining populations.

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Section: Discussionmentioning

confidence: 99%

Reduced disease in black abalone following mass mortality: phage therapy and natural selection

et al. 2014

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“…Frequencies of resistant genotypes may be increased in wild populations through the designation of marine protected areas (MPAs) or sanctuaries, or in aquaculture populations through selective breeding. Both of these methods are being used to increase resistance in oysters affected by MSX and dermo diseases [33]. Managers are not forced to watch in despair as a marine disease emergency unfolds.…”

Section: (B) Shifting Host -Pathogen-environment Relationships To Mitmentioning

confidence: 99%

Managing marine disease emergencies in an era of rapid change

Groner

Maynard

Breyta

et al. 2016

Phil. Trans. R. Soc. B

121

107

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Infectious marine diseases can decimate populations and are increasing among some taxa due to global change and our increasing reliance on marine environments. Marine diseases become emergencies when significant ecological, economic or social impacts occur. We can prepare for and manage these emergencies through improved surveillance, and the development and iterative refinement of approaches to mitigate disease and its impacts. Improving surveillance requires fast, accurate diagnoses, forecasting disease risk and real-time monitoring of disease-promoting environmental conditions. Diversifying impact mitigation involves increasing host resilience to disease, reducing pathogen abundance and managing environmental factors that facilitate disease. Disease surveillance and mitigation can be adaptive if informed by research advances and catalysed by communication among observers, researchers and decision-makers using information-sharing platforms. Recent increases in the awareness of the threats posed by marine diseases may lead to policy frameworks that facilitate the responses and management that marine disease emergencies require.

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“…Previous research studies in the northeastern and mid-Atlantic regions have successfully bred stocks of eastern oysters with increased resistance to the effects of Haplosporidium nelsoni (MSX) (Haskin & Ford 1979, Matthiessen et al 1990) as well as to the effects of both MSX and dermo (Ragone Calvo et al 2003a) and Roseovarius oyster disease (Davis & Barber 1999). Following these findings, selective breeding programs were organized and have significantly contributed to the expansion and success of oyster aquaculture in those regions (Guo et al 2008, FrankLawale et al 2014, Proestou et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Performance of oysters selected for dermo resistance compared to wild oysters in northern Gulf of Mexico estuaries

Casas¹,

Walton²,

Chaplin³

et al. 2017

Aquacult. Environ. Interact.

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The performance of the progeny of eastern oysters Crassostrea virginica from Louisiana selected for resistance to dermo, caused by Perkinsus marinus (referred to as 'OBOY') and of wild oysters collected from Louisiana (Calcasieu Lake) and Alabama (Cedar Point, Perdido Pass), USA, estuaries was compared for their potential use in aquaculture. Seed oysters from each stock were deployed in September 2011 at 2 dermo-endemic sites, Dauphin Island and Sandy Bay, Alabama, using an adjustable longline system, and their survival and shell heights were monitored bimonthly. P. marinus infection intensity and condition index were measured at deployment and in March, July and September 2012. The OBOY stock showed lower mortality than the unselected stocks (Cedar Point, Perdido Pass, Calcasieu Lake) at Dauphin Island, and both Louisiana stocks had lower mortality than the Alabama stocks at Sandy Bay, a slightly more saline site. Mortality increased in summer, especially between July and September, concomitant with increasing P. marinus infection intensities at the higher temperatures and favorable salinities. At the higher salinity site, both Louisiana stocks had lower P. marinus infection intensities than the Perdido Pass stock, the stock with the highest percentage of oysters with moderate and heavy infection and cumulative mortality. The OBOY stock reached greater mean shell height than Calcasieu Lake and Perdido Pass stocks. Condition index of the oyster stocks decreased by more than half between March and July following expected spawning. Differences in stock performance highlight the importance of stock selection for aquaculture in dermo-endemic estuaries of the northern Gulf of Mexico.

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Dual disease resistance in a selectively bred eastern oyster, Crassostrea virginica, strain tested in Chesapeake Bay

Cited by 115 publications

References 3 publications

Reduced disease in black abalone following mass mortality: phage therapy and natural selection

Reduced disease in black abalone following mass mortality: phage therapy and natural selection

Managing marine disease emergencies in an era of rapid change

Performance of oysters selected for dermo resistance compared to wild oysters in northern Gulf of Mexico estuaries

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