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American Fisheries Society (AFS) 137th Annual Meeting

September 02, 2007 - September 06, 2007
San Francisco, CA
Presentation at this event.

MORE INFORMATION
Abstract 3: Modeling green sturgeon habitat
Abstract 2: Improving the species-selectivity
Abstract 1: Spatial habitat use in anadromous
Conference website

The theme of the meeting is "Thinking Downstream and Downcurrent: Addressing Uncertainty and Unintended Consequences in Fish and Fisheries." At the interface between the Sacramento-San Joaquin River drainage and the Pacific Ocean, San Francisco provides an outstanding venue to think about managing whole ecosystems, advance your professional networking, and to keep current on emerging ideas in fisheries science and management.

ABSTRACT
Spatial habitat use in anadromous North American sturgeons and its importance for conservation

Erickson, Daniel , G. Bryja , S. Lindley , M. Moser , M. Belchik , A. Kahnle , M. Millard , J. Weber , J. Hightower , E. K. Pikitch , P. Doukakis
Pew Institute for Ocean Science, University of Miami, 541 Willamette St., Suite 207A, Eugene, OR 9740; phone: 541-915-4596; email: dle@efn.org

Management of North American sturgeons can be challenged by incomplete knowledge of spatial structure and habitat use, particularly in the open ocean and in feeding areas. Sonic telemetry and pop-off satellite archival tagging (PSAT) methods were used to study spatial characteristics of two North American sturgeon species (Atlantic sturgeon, Acipenser oxyrinchus oxyrinchus, green sturgeon, A. medirostis). Distinct Population Segments (DPS’s) have been designated for both Atlantic (five) and green sturgeons (two). PSATs were used for both species to study movements and habitat use in the open ocean. Sonic tags were used to examine spatial use in and among rivers for green sturgeon only. Data obtained were considered in light of potential threats and fisheries activity and management. Results illustrate that sturgeon from different DPS’s mix both in the open ocean and in foraging areas (e.g., estuaries). Spatial management must therefore consider range-wide threats in some cases. Similar threats (e.g., directed or bycatch fisheries) may simultaneously impact individuals from threatened and “healthy” DPS’s at certain times. We use our results to illustrate how fisheries interactions can be avoided through spatial and temporal management. We further consider how management scenarios may have differed if the spatial data presented had not been collected.

Daniel Erickson is also co-author on two additional presentations, see links under more information.

Authors highlighted in blue are staff of the Institute for Ocean Conservation Science.

 

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