8th International Conference on Shellfish Restoration Enhancement and sustainability of shellfish resources Brest, France, October 2 – 5, 2005 BOOK OF ABSTRACTS SPONSORS OF ICSR 2005 (by alphabetical order) Brest Métropole Océane (BMO) Centre National de la Recherche Scientifique (CNRS) Conseil Général du Finistère Florida Gulf Coast University (FGCU) Institut français de recherche pour l’exploitation de la mer (Ifremer) Institut Universitaire Européen de la Mer (IUEM) Organization of Economic and Cooperative Development (OECD) Région Bretagne South Carolina Sea Grant Consortium Université de Bretagne Occidentale (UBO) Ville de Brest Virginia Sea Grant Consortium 2 8th International Conference on Shellfish Restoration Enhancement and sustainability of shellfish resources Brest, France, October 2 – 5, 2005 Editors: J. Moal Ifremer, PFOM/LPI, BP 70, 29280 Plouzané, France P. Soudant CNRS, UMR6539, IUEM-UBO, 29280 Plouzané, France A. Volety Florida Gulf Coast University, Fort Myers, FL 33965-6565, USA 3 ICSR 2005 ORGANIZATION COMMITTEE Presidents P. SOUDANT (CNRS, France) et J. MOAL (IFREMER, France) A. HUVET (IFREMER, France) A. VOLETY (FGCU, USA) B. WASNO (Sea Grant, USA), C. HILY (CNRS, France) C. LAMBERT (UBO, France) F. JEAN (UBO, France) H. HEGARET (UCONN, USA) J. FLYE SAINTE MARIE (UBO, France) J. GRALL (UBO, France) J. PROU (IFREMER, France) J.-F. SAMAIN (IFREMER, France) P. MASQUELIER (Contrat de Baie, France) R. DEVOE (SC Sea Grant, USA) W.ARNOLD (FMRI, USA) Y.M. PAULET (UBO, France) 4 ICSR 2005 SCIENTIFIC COMMITTEE President: A. VOLETY (FGCU, USA) C. BACHER (IFREMER, France) D.L. LEONARD (Ocean Equities LLC, USA) G. BURNELL (UCC, Ireland), G. WIKFORS (NOAA, USA) J. BONCOEUR (UBO, France) J. CLAVIER (UBO, France) J. E. CLOERN (USGS, USA) J. MOAL (IFREMER, France) J.-F. SAMAIN (IFREMER, France) L. CHAUVAUD (CNRS, France) P. GOULLETQUER (IFREMER, France) P. SOUDANT (CNRS, France) R. DEVOE (Sea Grant, USA), R. LAE (IRD, France) S. FORD (Rutgers, USA), S. G. TOLLEY (FGCU, USA) Y.-M. PAULET (UBO, France) 5 6 October 2, 2005, Brest, France Dear Conference Participants: It is with great pleasure that we welcome you to the 8 th International Conference on Shellfish Restoration (ICSR). Thanks to all of you, we have an array of excellent presentations, round tables, and workshops spanning 3 days. More than 230 presentations from participants in over 28 countries, this meeting has shaped up to be an exciting event and one of the biggest ICSR conferences to date. We hope that you will also take some time to enjoy this beautiful part of Brittany, France. Brest, located on the western tip of the Brittany peninsula, is home to dramatic landscapes and seascapes. With a long maritime history, Brest is home to several oceanographic / marine research institutions, shipping industry and a naval base. The beaches and towns near Brest offer a glimpse into the rich history, gastronomic excellence, architecture, and life of this region of France. We also wish to take this opportunity to thank our ICSR 2005 sponsors for their generous support: Centre National de la Recherche Scientifique (CNRS), Conseil Général du Finistère, Florida Gulf Coast University, Institut francais de recherche pour l’exploitation de la mer (IFREMER), Institut Universitaire Européen de la Mer (IUEM), Brest Métropole Océane (BMO), Ville de Brest, Organization of Economic and Cooperative Development (OECD), Région Bretagne, South Carolina Sea Grant Consortium, Virginia Sea Grant Consortium, and the Université de Bretagne Occidentale (UBO). The monetary and in-kind support of these organizations is largely responsible for the depth and breadth of the scientific program that you will experience in this conference. We hope that this meeting will be a rewarding experience as well as a chance to meet colleagues, make friends, foster collaborations and learn more about the sustainability, restoration and enhancement of shellfish resources. Thank you again for your participation. Sincerely, ICSR 2005 Organizing and Scientific Committees. 7 ICSR Series 8th ICSR: Oct 2-5, 2005, Brest, France. 7th ICSR: Nov 17-20, 2004, Charleston 6th ICSR: Nov 20-24, 2002. Charleston 5th ICSR: Sep 18-21, 2001, Nanaimo, Canada. 4th ICSR: Nov 15-18, 2000, Hilton Head 3rd ICSR: Sep 29 – Oct 2, 1999, Cork, Ireland 2nd ICSR: Nov 18-20, 1998, Hilton Head 1st ICSR: Nov 20-23, 1996, Hilton Head 8 ICSR 2005 Conference Overview Throughout the world there is a growing commitment to the restoration of degraded coastal ecosystems. Major activities of economic importance, such as aquaculture and fisheries rely on the good health of our marine ecosystems. Political pressure by shareholders in the future of the world's coastal seas has renewed public interest in preserving and enhancing coastal biological resources at all levels of government. Scientists and many volunteer organizations have developed successful programs to identify problem areas, recommend improvements, develop scientifically-based restoration tools, monitor progress and evaluate the interactions between environment and biological resources. It is now widely recognized that shellfish resources are fragile and threatened by chronic and accidental pollution, habitat alteration, toxic algal blooms, emerging diseases, invasive species and other pressures associated with ecosystem perturbations. In this context, the 8th International Conference on Shellfish Restoration (ICSR'05) will provide an opportunity for scientists, government officials, resource managers, users, community leaders, and concerned citizens and the public to exchange information about the biology, ecology and sustainable exploitation of shellfish resources, to discuss approaches to restore coastal shellfish ecosystems through management, enhancement, and restoration efforts, and to share innovative management, ecological, and social approaches toward the restoration of degraded shellfish habitat and the improvement of coastal ecosystem health. The conference is scheduled for October 2-5, 2005 at the conference Center ‘Le Quartz” in downtown Brest, France, and will consist of invited key note and panel presentations, round table discussions and contributed poster presentations. More than 230 participants representing 28 countries are attending the conference. 9 Acknowledgements We would like to thank Geneviève LEGRAND, Sylvie GROS, Jean-René LECOZ, Alphonse CARLIER, Susan FOHS, Caroline BRISKY, Peg FLYNN, Alain LAPONCHE and Marcos SCARDUA, for their help with technical assistance, web design and maintenance, and logistics related to the conference. They have worked diligently for countless hours to help make the meeting a success. Disclaimer By Organisation for economic co-operation and development (OECD) The opinion expressed and arguments employed in this publication are the sole responsibility of the authors and do not necessarily reflect those of the OECD or of the governments of its Member countries Les opinions et les interprétations exprimées dans le présent rapport sont celles des auteurs et ne reflètent pas nécessairement les vues de l'OCDE ou des gouvernements de ses pays Membres. 10 TABLE OF CONTENTS (alphabetical order according to the first author name) ORAL COMMUNICATIONS ASSESSMENT OF SHELLFISH HABITAT AND RESOURCES....... 25 MID-TERM (1998-2004) CLAM ( RUDITAPES DECUSSATUS ) AND COCKLE ( CERASTODERMA EDULE ) SHELLFISH RESOURCE ASSESSMENT IN THREE ESTUARIES OF THE BASQUE COUNTRY, NORTHERN SPAIN. J. Bald, A. Borja and I. Muxika......................................................................................................................... 25 A MODEL OF THE IMPACT OF FISHING BOTTOM TRAWLS ON THE INVERTEBRATE COMMUNITIES OF THE GREAT MUDDY BANK (BAY OF BISCAY, FRANCE). F. Blanchard, F. Le Loch and R. Vergnon ............... 25 ASSESSING THE STATUS AND TRENDS OF NATURAL AND RESTORED SUBTIDAL AND INTERTIDAL OYSTER REEFS: ‘TRIED AND TRUE’ AND NOVEL METRICS FOR EVALUATING ECOLOGICAL FUNCTION, SUSTAINABILITY AND REEF SUCCESS. L.D. Coen (PLENARY TALK)........................................ 25 A COMPREHENSIVE ASSESSMENT OF SOUTH CAROLINA’S INTERTIDAL OYSTER RESOURCES/HABITATS USING HIGH RESOLUTION, MULTI-SPECTRAL DIGITAL IMAGERY FOR MANAGEMENT AND RESTORATION. L.D. Coen, K.E. Schulte, G.M. Yianopoulos, R.F. Van Dolah, W.D. Anderson, M.W. Vo, M.A. Finkbeiner and W.R. Stevenson .......................................................................................... 26 ESTIMATING SCALLOP DREDGE EFFICIENCY AND BIOMASS OF SOWN POPULATIONS USING REPEATED DREDGE TOWS. M. Fréchette and D. Lefaivre....................................................................................... 27 MANAGING FISHERIES TO PROTECT MARINE HABITATS. C.L.J. Frid. (PLENARY TALK) .......................... 27 ECOLOGICAL IMPACTS OF SCALLOP DREDGES: EXAMPLE TO THE BAY OF BREST MAERL BEDS. B. Guyonnet and J. Grall. .................................................................................................................................................... 27 ECOSYSTEM SERVICES PROVIDED BY OYSTER REEFS: AN EXPERIMENTAL ASSESSMENT. K. L. Heck Jr, J. Cebrian, S. P. Powers, D.A. Byron, C.D. Foster and N. Geraldi................................................................................. 27 LONG TERM DATA ON MOLLUSKS: WHAT CAN WE LEARN THAT MIGHT ASSIST IN RESTORATION EFFORTS. J. Kraeuter and S. Buckner........................................................................................................................... 28 HOW HAS TRAWLING ACTIVITIES AFFECTED HABITAT AND ASSOCIATED