NWFSC Monster Seminar Jam: Martin C. Arostegui
This seminar is part of the Northwest Fisheries Science Center's Monster Seminar Jam series.
Martin C. Arostegui, Ph.D. and Postdoctoral Scholar (University of Washington, Applied Physics Laboratory, Air-Sea Interaction & Remote Sensing Department) is presenting a talk, "Environmental structuring of pelagic predator behavior at the macro- and microscale: understanding the diversification and fishery susceptibility of molas and thresher sharks." The talk will be moderated by Jonelle Gates (Northwest Fisheries Science Center).
Pelagic predator behavior is structured by biotic and abiotic factors at multiple scales that influence when and where such species are likely to be found in the world’s oceans. Environmental variation in these factors, from the macroscale among regions to the microscale among depth strata, sustains ecological diversification and determines susceptibility to anthropogenic activity. With two case studies, each at a different scale, my colleagues and I examine what drives pelagic predator behavior and how that knowledge can benefit their conservation. Using observer data from a commercial fishery spanning > 50◦ in longitude, and > 45◦ in latitude, we show the macroscale, spatiotemporal segregation of three ocean sunfish species in the eastern North Pacific. Next, we investigate the modulation of behavior by microscale environmental forcing using high-resolution telemetry data from a pelagic thresher shark in the Red Sea, in concert with oxygen measurements from an autonomous ocean glider and light-based estimations of scattering layer distribution. Together, these case studies highlight how a holistic understanding of animal behavior requires cross-disciplinary research at multiple scales, some of which are only now becoming quantifiable with the advent of new technologies and analytical methods.
Dr. Martin “Martini” Arostegui is a Postdoctoral Scholar in the Air-Sea Interaction and Remote Sensing Department of the University of Washington Applied Physics Laboratory. His research focuses on the behavior and ecology of marine and aquatic fishes, particularly in the context of physiology, movement, and trophic interactions. Focal species include those of recreational or commercial fishery interest, as well as those that are understudied and underappreciated.
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