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Implications of the Deepwater Horizon Explosion on Alabama Fisheries

Implications of the Deepwater Horizon Explosion on Alabama Fisheries. J. Marcus Drymon Shelby Center for Ecosystem Based Fishery Management, Dauphin Island Sea Lab. April 20, 2010: the DWH Explosion. f ellowshipofminds.wordpress.com. June 21, 2010: Federal Fisheries Closure.

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Implications of the Deepwater Horizon Explosion on Alabama Fisheries

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  1. Implications of the Deepwater Horizon Explosion on Alabama Fisheries J. Marcus Drymon Shelby Center for Ecosystem Based Fishery Management, Dauphin Island Sea Lab

  2. April 20, 2010: the DWH Explosion fellowshipofminds.wordpress.com

  3. June 21, 2010: Federal Fisheries Closure wikipedia.org

  4. The Gulf of Mexico: a Complex Ecosystem

  5. Potential Impacts from the DWH thesun.co.uk Direct (contaminant related) Indirect (environmental) Complex (e.g. fishing release)

  6. Our Focus Today • Time Series Data Bottom longline: sharks Vertical longline: adult red snapper Trawl: juvenile red snapper • Incidence of Diseased Fish • The Alabama Alps

  7. Time Series Data …

  8. Time Series Data …

  9. …from an Ecosystem Perspective

  10. Blacktip Atl. Sharpnose Sandbar Bottom Longline ScallopedHH Blacknose Bull Spinner Great HH Bonnethead Finetooth Tiger Nurse

  11. Bottom Longline Sharpnose Blacknose Tiger 2010 2011 2010 2011 2010 2011

  12. Vertical Longline

  13. Vertical Longline

  14. Trawl 2010 2011

  15. Incidence of Diseased Fish

  16. Incidence of Diseased Fish Ben Raines, Mobile Press-Register

  17. The Alabama Alps

  18. The Alabama Alps

  19. Final Thoughts Could there be changes to the Gulf of Mexico ecosystem? • A different shark assemblage: Opportunistic predation? • More large red snapper: 2010 fishery closure? • Fewer small red snapper: Year class failure? Increased cannibalism? • Incidence of diseased fish appears normal.

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