GEF International Waters Conference Salvador, Brazil 20-27 June 2005 APPLICATION OF LME INDICATORS : SCOTIAN SHELF LME and THE U.S. NORTHEAST SHELF LME.

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Presentation transcript:

GEF International Waters Conference Salvador, Brazil June 2005 APPLICATION OF LME INDICATORS : SCOTIAN SHELF LME and THE U.S. NORTHEAST SHELF LME

10 U.S. LMEs

THE SCOTIAN SHELF LME

From: Frank, Petrie, Choi, and Leggett Trophic cascades in a formerly cod-dominated ecosystem. Science 308:1621.

CHANGING CONDITIONS From: Choi, Frank, Leggett, and Drinkwater, Transition to an alternate state in a continental shelf ecosystem. Can. J. Fish. Aquat. Sci. 61:

NORTHEAST SHELF LME

An undulating oceanographic recorder (above), towed behind a ship, is used to collect ecological parameters needed to assess the state of the marine ecosystem (left). PRODUCTIVITY INDICATORS

Northeast Shelf Meteorology

Climate Drivers of the Northeast Shelf Ecosystem Warm Gulf Stream waters Cold Scotian Shelf incursions Winter North American cold air Warm Gulf of Mexico air Position of westerly North American jet air stream from O. Hertzman, 1996

General Circulation of the Northeast Shelf Ecosystem

FISH AND FISHERIES INDICATORS Demersal species surveys Pelagic species surveys Ichthyoplankton surveys Invertebrate surveys (clams, scallops, shrimp, lobster, squid) Essential fish habitat Marine protected areas

COMMON TERMS from Our Living Oceans Report Recent average yield (RAY) Current potential yield (CPY) Long term potential yield (LTPY) Stock level relative to LTPY Status of resource utilization Threatened or endangered Potential biological removal (PBR / MMPA)