Bay Scallop Population Dynamics within Two Southwest .ppt

1、Bay Scallop Population Dynamics within Two Southwest Florida Estuaries Following Restoration Practices Utilizing Competent Larval Releases,Presented by:Jay R. Leverone,PARTNERS,Jay Leverone: Mote Marine Laboratory Steve Geiger: Florida Fish & Wildlife Research Institute Bill Arnold: Florida Fish & W

2、ildlife Research Institute Sarah Stephenson: Florida Fish & Wildlife Research Institute Curt Hemmel: Bay Shellfish Company Jaime Boswell: Sanibel-Captiva Conservation Foundation Norm Blake: University of South Florida Peter Clark:Tampa Bay Watch,Florida Bay Scallop Populations,History of Florida Bay

3、 Scallop Restoration Strategies,Direct Translocation of Native Stock from Stable PopulationsPlanting of Hatchery-Produced Scallop SeedRelease of Hatchery-Reared Scallop Larvae,Direct Translocation from Stable Populations,1972: Scallops transferred from Anclote to Tampa Bay and placed in cages to mon

4、itor thermal effects from a power plant (USF)1980: Scallops translocated from Anclote to Mullet Key Bayou (USF)1993: Steinhatchee to Sarasota Bay (MML)1995: Steinhatchee to Tampa Bay (TBW)2002-05: Renewal of direct transplant from resurgent Anclote population (FWRI),Planting of Hatchery-Produced Sca

5、llop Seed,1991: Free release at two sites in Tampa Bay (USF)1997-99: Major restoration effort from Crystal River to Tampa Bay (FWRI)1999: First scallop seeding effort in Sarasota Bay (MML)2000-01: Second, larger seeding project in Sarasota Bay (FWRI)2004: Seven locations within Tampa Bay (FWRI),Rele

6、ase of Hatchery-Reared Scallop Larvae,2003-present: Pine Island Sound, Lee County2005-present: Mullet Key Bayou, Boca Ciega Bay, lower Tampa Bay,Location of Tampa Bay and Pine Island Sound along the Florida west coast,Larval release () and spat monitoring () locations within each estuary,Enclosure S

7、etup,Preparing Larval For Release,Releasing Larvae and Monitoring Recruitment,Release schedule for each estuary,Spat settlement for each larval release,2003 Scallop Distribution Total = 28; Density = 1.4,2004 Scallop Distribution Total = 21; Density = 1.05,Restoration Site Total = 63; Density = 160,

8、2005 Scallop Distribution Total = 1,868; Density = 93.4,2006 Scallop Distribution Total = 163; Density = 8.15,2007 & 2008 Scallop Total = 0,Scallop populations: South PIS,2004,2005,2006,2007-08,Recruitment of Scallops to Background Collectors in Pine Island Sound,Annual scallop abundance in Tampa Ba

9、y,TBW = Tampa Bay Watch “Great Bay Scallop Search” Volunteer Survey FWRI = Fish & Wildlife Research Institute Surveys,Tampa Bay Scallop Distribution 2007 - 2008,Recruitment of Scallops to Background Collectors in Tampa Bay,Differences in Scallop Population Dynamics Between Estuaries,Pine Island Soun

10、d Temporary resurgence in scallop abundance concurrent with 2003 restoration efforts 2005 restoration did not show similar response Recruitment limitation in the years following successful restoration led to population crash in 2007 Local scallop populations are likely isolated from other west Flori

11、da populations,Differences in Scallop Population Dynamics Between Estuaries,Tampa Bay Recovery in scallop populations since 2007 coincides with larval release restoration activities Population recovery is also coupled with high recruitment rates in lower Tampa Bay Tampa Bay populations have maintain

12、ed connectivity to adjacent coastal populations,Implications for Future Restoration and Management Strategies,Need to monitor population dynamics in the smaller coastal embayments between Tampa Bay and Pine Island Sound Pine Island Sound may require multi-level restoration plan, while Tampa Bay can

13、utilize spat collectors for long-term seeding Better understanding of water quality and harmful algal dynamics in Pine Island Sound will be required for ultimate recovery of scallops,Funding and Support,National Sea Grant National Oceanographic and Atmospheric Administration Tampa Bay Estuary Program Sarasota Bay Estuary Program Florida Department of Environmental Protection National Fish and Wildlife Foundation (Pinellas County Environmental Fund) Charlotte Harbor National Estuary Program Ocean Trust Foundation South Florida Water Management District Mote Scientific Foundation,