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

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Presentation on theme: "Implications of the Deepwater Horizon Explosion on Alabama Fisheries J. Marcus Drymon Shelby Center for Ecosystem Based Fishery Management, Dauphin Island."— Presentation transcript:

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 Direct (contaminant related) Indirect (environmental) Complex (e.g. fishing release) thesun.co.uk

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

9 …from an Ecosystem Perspective

10 Spinner Tiger Blacknose Great HH Bonnethead Finetooth Nurse Scalloped HH Bull SandbarBlacktip Atl. Sharpnose Bottom Longline

11 SharpnoseBlacknoseTiger 201020112010201120102011

12 Vertical Longline

13

14 Trawl 20102011

15 Incidence of Diseased Fish

16 Ben Raines, Mobile Press-Register

17 The Alabama Alps

18

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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