Speaker: Felix Vaux, Postdoctoral Research Associate, State Fisheries Genetics Lab, Coastal Oregon Marine Experiment Station, Oregon State University
Topic: Population structure in a highly migratory species, albacore tuna (Thunnus alalunga)
The accurate evaluation of population structure is a serious challenge for the effective management and conservation of many highly migratory fish species, including albacore tuna (Thunnus alalunga). Albacore occur throughout most temperate and tropical ocean waters around the world, supporting large fisheries of particular economic important to many regions, including Oregon. Albacore are capable of swimming continuously at high speeds and traveling vast distances within their lifetime, but surprisingly little is known about the distribution, migration cycle, and population structure of the species. This lack of knowledge is a concern as annual landings for albacore are highly variable, and recent research predicts that the range of the species will be significantly affected by climate change. We use double-digest restriction-site associated DNA (ddRAD) sequencing to investigate the population genetic variation among albacore in the Pacific Ocean, and test for neutral and putatively adaptive genetic differences among groups. We sample hundreds of albacore from 2 areas in the South Pacific and 10 areas in the North Pacific, including 6 locations along the West Coast. Our results challenge conclusions based on previous small-scale genetic and tagging studies, and we suggest topics for future research.
Tuesday, October 29 at 2:00pm to 3:00pm
Hatfield Marine Science Center, Guin Library Seminar Room
2030 SE Marine Science Dr, Newport, OR 97365