Assessing Local Adaptation and the Response to Ocean Acidification in Rock Scallops to Inform Aquaculture Practice
Presentation Abstract
The shellfish aquaculture industry is among the first economic sectors to be negatively affected by ocean acidification, in part because changes in water chemistry interfere with shell formation and reduce survival and productivity. Populations already adapted to low pH may represent important genetic resources for the development of resistant strains. The protection of such genetic resources is of crucial importance in a rapidly changing environment, adding to traditional concerns of genetic interactions between wild and captive populations. The purple-hinged rock scallop (Crassadoma gigantea), a species native to the U.S. Pacific coast, is currently under consideration for commercial aquaculture. Across their range, rock scallops may exhibit population structure due to restricted gene flow and local adaptation that should be conserved. We will use whole genome scans of wild scallops to measure the degree of population structure and local adaptation at two spatial scales: among wild populations in California, Washington, and Alaska, and among wild populations within Washington. We will quantify neutral genetic divergence, explore molecular evidence for adaptive genetic differentiation, and identify discriminatory markers for routine screening of wild populations and captive broodstock. In addition, we will use a common garden experiment with an elevated pCO2 treatment to directly compare performance of larval families from California, Washington, and Alaska. Our findings will inform resource managers and aquaculture practitioners, and contribute to wild stock resilience and the sustainability of C. gigantea aquaculture.
Session Title
Ocean Acidification in the Salish Sea
Conference Track
Climate Change and Ocean Acidification
Conference Name
Salish Sea Ecosystem Conference (2016 : Vancouver, B.C.)
Document Type
Event
Start Date
2016 12:00 AM
End Date
2016 12:00 AM
Location
2016SSEC
Type of Presentation
Oral
Genre/Form
conference proceedings; presentations (communicative events)
Contributing Repository
Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.
Subjects – Topical (LCSH)
Shellfish--Pacific Coast (America); Aquaculture--Environmental aspects--Pacific Coast (America); Marine resources conservation--Economic aspects--Pacific Coast (America)
Geographic Coverage
Pacific Coast (America)
Rights
This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.
Type
Text
Language
English
Format
application/pdf
Assessing Local Adaptation and the Response to Ocean Acidification in Rock Scallops to Inform Aquaculture Practice
2016SSEC
The shellfish aquaculture industry is among the first economic sectors to be negatively affected by ocean acidification, in part because changes in water chemistry interfere with shell formation and reduce survival and productivity. Populations already adapted to low pH may represent important genetic resources for the development of resistant strains. The protection of such genetic resources is of crucial importance in a rapidly changing environment, adding to traditional concerns of genetic interactions between wild and captive populations. The purple-hinged rock scallop (Crassadoma gigantea), a species native to the U.S. Pacific coast, is currently under consideration for commercial aquaculture. Across their range, rock scallops may exhibit population structure due to restricted gene flow and local adaptation that should be conserved. We will use whole genome scans of wild scallops to measure the degree of population structure and local adaptation at two spatial scales: among wild populations in California, Washington, and Alaska, and among wild populations within Washington. We will quantify neutral genetic divergence, explore molecular evidence for adaptive genetic differentiation, and identify discriminatory markers for routine screening of wild populations and captive broodstock. In addition, we will use a common garden experiment with an elevated pCO2 treatment to directly compare performance of larval families from California, Washington, and Alaska. Our findings will inform resource managers and aquaculture practitioners, and contribute to wild stock resilience and the sustainability of C. gigantea aquaculture.
