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Marine Molluscs in a Changing Environment”

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Marine Molluscs in a Changing Environment” PHYSIO MAR Physiomar 08 Physiological aspects of reproduction, nutrition and growth “Marine molluscs in a changing environment” IUEM CNRS IRD Book of abstracts INSTITUT UNIVERSITAIRE EUROPEEN DE LA MER http://www.univ-brest.fr/IUEM/PHYSIOMAR/ UNIVERSITE DE BRETAGNE OCCIDENTALE Ifremer Physiomar 08 – Brest, France – 1-4 September, 2008 PHYSIOMAR 08 "Marine molluscs in a changing environment" 2nd marine mollusc physiology conference Brest, France, September 1-4, 2008 Compiled by : M. Gaasbeek and H. McCombie Editor : Ifremer 1 Physiomar 08 – Brest, France – 1-4 September, 2008 2 Physiomar 08 – Brest, France – 1-4 September, 2008 Welcome to Physiomar 2008 Welcome to the Physiomar 2008 conference and to Brest! This second mollusc physiology meeting is being organized jointly by LEMAR (IUEM: European Institute for Marine Studies) and LPI (Ifremer: French Institute for the Exploitation of the Sea), as both laboratories conduct research in this field. Physiomar 08 follows the very successful workshop ‘Physiological aspects of reproduction and nutrition in marine mollusks’ held in La Paz (Mexico) in November 2006 under the guidance of Maria Concepcion Lora Vilchis and Elena Palacios Metchenov from CIBNOR. This year’s meeting will focus on Reproduction, Growth, Nutrition and Genetics and genomics of marine molluscs, and include a specific session on the effects of climate change on mollusc physiology: Global change. This conference will serve as a forum for the communication of recent advances in all aspects of the physiology in molluscs. Researchers, students, stakeholders and mollusc farmers will have the opportunity to communicate personally in a friendly environment with leaders in the field. This meeting aims to provide a vehicle for continuing exchanges, cooperation, and collaboration in the field of the physiology of marine molluscs to better understand their adaptation ability in a changing environment, their ecological significance, and to promote their sustainable culture. Contents: Introduction p 3 Members of the organizing and scientific committees p 4 Conference overview p 5 Abstracts: oral presentation abstracts pp 7-87, poster abstracts pp 89-163 List of participants p 165 3 Physiomar 08 – Brest, France – 1-4 September, 2008 Organizing Committee Scientific Committee Alunno-Bruscia, Marianne (Ifremer) Beaumont, Andy (United Kingdom) Boudry, Pierre (Ifremer) Bejaoui, Nejla (Tunisia) Donval, Anne (IUEM) Choi, Kwang-Sik (South Korea) Fabioux, Caroline (IUEM) Goulletquer, Philippe ( France) Huvet, Arnaud (Ifremer) Heras, Horacio (Argentina) Le Mercier, Alain (IUEM) Kamermans, Pauline (Netherlands) Moal, Jeanne (Ifremer) Magnesen, Thorolf (Norway) Paulet, Yves-Marie (IUEM) Nelson, David (France) Robert, René (Ifremer) Palacios Mechetnov, Elena (Mexico) Soudant, Philippe (IUEM) Parisi, Guiliana (Italy) Suquet, Marc (Ifremer) Ragg Norman (New Zealand) San Juan, Fuencisla (Spain) Shaffee Meeransa Syed (Morroco) Southgate, Paul (Australia) Tremblay, Rejean (Canada) Wikfors, Gary (U.S.A.) 4 Physiomar 08 – Brest, France – 1-4 September, 2008 Conference overview Sunday 31 August Starting 17.00 Registration Espace Vauban 18.30 - 23.00 Welcome buffet Espace Vauban Monday 1 September 09.00 - 09.30 Introduction IUEM 09.30 - 12.30 Nutrition IUEM 12.30 - 14.00 Lunch Restaurant Universitaire Plouzane 14.00 - 16.15 Genetics and genomics IUEM 16.15 – 17.45 Poster session IUEM 18.00 – 19.00 Welcome Aperitif Ifremer Tuesday 2 September 08.45 - 10.30 Genetics and genomics IUEM 11.00 - 12.30 Gobal change IUEM 12.30 - 14.00 Lunch Restaurant Universitaire Plouzane 14.00 - 16.30 Global change IUEM 16.30 - 17.30 Poster session IUEM 18.00 - 19.30 Welcome Aperitif City Hall Wednesday 3 September 08.45 - 12.30 Growth IUEM 12.30 - 14.00 Lunch Restaurant Universitaire Plouzane 14.00 - 16.15 Growth IUEM 16.15 - 17.30 Poster session IUEM 20.00 - 23.00 Gala dinner ARMEN Restaurant Thursday 4 September 09.00 - 12.30 Reproduction IUEM 12.30 - 14.00 Lunch Restaurant Universitaire Plouzane 14.00 - 15.00 Reproduction IUEM 15.00 Conclusions IUEM The grey colour indicates activities in Brest city centre. 5 Physiomar 08 – Brest, France – 1-4 September, 2008 Physiomar 08 – Brest, France – 1-4 September, 2008 Oral presention abstracts Abstracts of all presentations are listed below (all subject sessions together) in alphabetical order of the first author’s last name. For papers with several authors, the name of the presenting author is underlined. 7 Physiomar 08 – Brest, France – 1-4 September, 2008 Physiomar 08 – Brest, France – 1-4 September, 2008 Preliminary spat recruitment of fan mussel (Pinna nobilis, Linnaeus 1758) on mesh bag collector in Karantina Island, Aegean Sea Turkey Sefa ACARLI, Aynur LÖK, Serpil SERDAR, Aysun KÜCÜKDERMENCI, Ali KIRTIK, Selcuk YIĞITKURT, Deniz ACARLI Ege University, Fisheries Faculty, Department of Aquaculture, Bornova, 35100, Izmir, Turkey Email: [email protected] Keywords: Pinna nobilis, fan mussel, spat recruitment, collector, Aegean Sea The fan mussel Pinna nobilis is a particularly important species in the Mediterranean Sea. The population of Pinna nobilis has been greatly reduced recently in Turkey as the other countries. It has been listed as an endangered species in the Mediterranean. For this reason, studies on Pinna nobilis are important for supporting populations in natural areas. Studies cover aspects such as spat recruitment, planting young individuals, reproductive cycle in selected areas, etc. The aim of this study was to determine the most suitable time to attach fan mussel spat from natural populations. We evaluated experimental collection of Pinna nobilis spat on mesh bag substrates in Karantina Island, Aegean Sea, Turkey during a year. Spat collectors were deployed at 8 m deep every month at the study area. Spat-set were estimated as number of fan mussel per square meter of mesh bag after a month. Environmental parameters (temperature, salinity, particulate organic matter, particulate inorganic matter and chlorophyll-a) were recorded during the experiment .The average number of fan mussel spat was the highest 122 spat/m2 in July. Spat data showed important variations between outside and inside of each mesh bag collector and also deployment time (P < 0.05). According to the results of spat recruitment we can say that reproductive period of fan mussel in Izmir Bay is in the summer months. 9 Physiomar 08 – Brest, France – 1-4 September, 2008 Reproductive patterns of the queen conch, Strombus gigas in various sites from the Caribbean region: management measures for its fishery Dalila ALDANA ARANDA, Adriana ZETINA ZARATE, Liliane FRENKIEL CINVESTAV-IPN Unidad Mérida. Km 6 Antigua Carretera a Progreso. AP 73 Cordemex. Mérida, Yucatán, México Email: [email protected] Keywords: Strombus gigas, wild population reproductive cycle, management measures The queen conch, Strombus gigas is a species of primary economic importance in the Caribbean region. Its importance comes from local demand for inner consumption and the tourist market as well as from export to USA and French Caribbean islands which consume most of the production exported by several Caribbean countries. Its populations have been depleted in many areas and seriously diminished in others. Therefore, various measures have been taken to regulate exploitation, which include minimum catch size, based on shell length, catch quotas, temporal or permanent fishing bans. However the bans not all the time correspond to the reproductive period. This is the same situation for the minimum catch size; this management measure was established using the shell length in most countries. Few countries have used the shell lip presence as a management measure. Frenkiel et al (2007) demonstrated a relationship between the first gonad development and the lip thickness for S.gigas. In order to analyze the reproductive pattern of the species and to determine the variability of its reproductive cycle under diverse environmental conditions in the Caribbean, data of the reproductive cycle were analyzed for Alacranes reef on the Gulf of Mexico coast of Yucatan, Mexico; San Pedro bank, Belize; San Andrès Island, Colombia and Guadeloupe, French West Indies. Data showed that the minimal catch size does not appear as mandatory; the existence of a thin shell lip is neither an efficient criteria of sexual maturity. Only conchs with a lip thickness >5 mm appear as reproductive organisms. Therefore, it is necessary to introduce this criterion to regulate the stock of this species. Finally different management measures for S. gigas were analyzed versus its reproductive biology. Based on this study, a temporal ban from 1st May to 30 September is proposed and a minimum catch size of 6mm of lip thickness which seems to be well fitted to protect the main reproduction period and to improve the reproductive stock. This study showing that conchs from 30- 40 m depth have a normal reproductive cycle, in order to protect this reproductive stock it will be necessary to prohibit fishing with scuba gear and nets. Nets catching adults and juveniles appear as especially noxious. To be efficient these regulations have to be applied in all Caribbean countries and to be included in the CITES regulations for exportation. However, the level of protection will depend on a strict enforcement of regulations to control exploitation and reduce illegal fishing. Physiomar 08 – Brest, France – 1-4 September, 2008 Development of functional genomics tools for the selection of QPX-resistant hard clam stocks
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