[Bevan Seminar] Armstrong on "Claws, causes, climate, and corps: A cavalcade of true crab sagas"

Start Date/Time: Thursday, January 05, 2012, 4:30 PM
Ending Date/Time: Thursday, January 05, 2012, 5:50 PM
Location: 102 Fishery Sciences (Auditorium), 1122 NE Boat St

Speaker: David Armstrong, Director, School of Aquatic & Fishery Sciences, University of Washington

Title: "Claws, causes, climate, and corps: A cavalcade of true crab sagas"

Part of the Bevans Series on Sustainable Fisheries.

Crabs have complicated life histories that include, in many cases, ontogenetic shifts into a disparate range of habitats from open pelagic zones over continental shelves to estuarine nursery areas. Across the spectrum of life history stages occupying various habitats, a wide array of top-down and bottom-up drivers are evoked to account for highly variable recruitment to both reproductive populations and, ultimately, the fisheries for several well-studied species. While most U.S. Crab fisheries are seemingly managed in a conservative fashion based on surplus males, there are still many particulars reviewed and considered during processes such as MSC certification or rationalization planning that underscore both the complexity of life-history-habitat interactions, and how much remains unknown in many cases. Intertwined are reoccurring instances of human perturbations (and good intentions) in the forms of habitat destruction, mitigation attempts, overfishing, and legal issues that amplify complexity and challenge sustainability. Ever more at the forefront for these species and their fisheries are uncertainties about forthcoming impacts of climate change that may be adversely operative at multiple spatial and temporal scales. I will highlight unique, sometimes odd, aspects of life history, ecology, and management history for a few species that dramatize the myriad issues related to fisheries and ecosystems that support them.