[PAST EVENT] Mapping migrations onto dynamic seascapes

October 7, 2015
12pm - 1pm
VIMS - Andrews Hall, Dominion Classroom 326
1309 Greate Road
Gloucester Point, VA 23062Map this location
Fisheries Science Noon Seminar Series

Speaker: Dave Secor

Title: Mapping migrations onto dynamic seascapes: "The most essential things are invisible to the eye."

Abstract: The digital age has ushered in countless discoveries on the previously hidden lives of marine fishes. What have we learned? Have organizing principles emerged from this deluge of discovery? Can we harness new found diversity to improve stewardship of fisheries and marine ecosystems? From the millions of telemetered paths, turns, dives, stops, and spins comes movement ecology - a focus on what motivates the individual. Compelling and elegant rules such as Lèvy flights and area-restricted search behaviors give rise to models that forecast shorter term aggregate behaviors. But across seasons and years, collective agencies (schooling, homing, straying, irruptions, partial migration) take hold leading to non-linear, multi-modal, and transient population outcomes. Migration ecology embraces such collective emergent behaviors, with emphasis on (1) the alignment of mating systems with larval dispersal, (2) the migration of cohorts through size-structured marine foodwebs, and (3) the synergy of natal homing, straying, and partial migration in populations that are both open and closed to immigration. Through complex life cycles, populations build contingents for contingencies, a property that managers could harness to build stability and resilience in marine fisheries against future non-stationary and novel ecosystem states. Contingent structures and collective agencies will remain hidden from view so accounting for these behaviors in stock assessments promises to be expensive and uncertain. Here simulation modelling provides the ability to explore concepts of life cycle diversity against their likely influences on stock performance.

Biopic: Dr. David Secor is Regents Professor at University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory. His primary interest is how diversity in life history and migration contribute to stability and resilience in exploited species and species of concern. He earned his PhD in 1990 at the Baruch Institute, University of South Carolina, developing otolith-based applications to study recruitment and larval dispersal, and studying aquaculture in Japan. Since then, he has been at Chesapeake Biological Laboratory, where he, his students, and collaborators have contributed substantively to digital-age discoveries on the migration ecology for scores of coastal fishes in 150 journal articles, chapters, and books. Currently his laboratory oversees large telemetry projects on US coastal migrations of striped bass and Atlantic sturgeon. Secor provides scientific advice on issues related to stock structure, stock assessment, climate impacts, and ecosystem-based fisheries management to the Chesapeake Bay Program, the US Atlantic States Marine Fisheries Commission, the US Mid-Atlantic Fisheries Management Council, the International Council for the Exploration of the Sea, and the International Commission for the Conservation of Atlantic Tunas. Dr. Secor is an editor of ICES Journal of Marine Science and has written {{http://tinyurl.com/pf8lp7y,"Migration Ecology of Marine Fishes,"}}, a follow up to Harden Jones classic "Fish Migration" which was published nearly 50 years ago.

[[v|dmk,Professor David Kaplan]]