Comparison of shell strength in wild and cultured scallops (Pecten maximus) |
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| Affiliation: | 1. IFREMER, Laboratoire Environnement Ressources des Pertuis Charentais (LER/PC), BP7, 17137 L''Houmeau, France;2. IFREMER, Laboratoire Environnement Ressources des Pertuis Charentais (LER/PC), BP133, 17390 La Tremblade, France;3. IFREMER, DYNamiques des Environnement Ecosystèmes CÔtiers (DYNECO/PELAGOS), BP70, 29280 Plouzané, France;4. IFREMER, Laboratoire Environnement Ressources Morbihan-Pays de la Loire (LER/MPL), BP86, 56470 La Trinité sur mer, France;5. IFREMER, DYNamiques des Ecosystèmes CÔtiers (DYNECO/DHYSED), BP70, 29280 Plouzané, France;6. IFREMER, Laboratoire de Génétique et Pathologie des Mollusques Marins, SG2M-LGPMM, 17390 La Tremblade, France;7. IFREMER, Direction Scientifique, BP21105, 44311 Nantes, France;1. School of Marine Biomedical Science (BK21 PLUS), Jeju National University, 102 Jejudaehakno, Jeju 63243, Republic of Korea;2. Department of Fisheries, University of Rajshahi, Bangladesh;3. Korea National College of Agriculture and Fisheries, 1515, Kongjwipatjwi-ro, Wansan-gu, Jeonju-si, Jeollabuk-do, 54874, Republic of Korea;4. School of Environmental Science & Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea;1. Institut des Sciences de la Mer, Université du Québec à Rimouski, 310 Allée des Ursulines, Rimouski, QC G5L 3A1, Canada;2. Département de biologie, chimie et géographie, Université du Québec à Rimouski, Rimouski, Québec, Canada;3. Les laboratoires Iso-BioKem Inc., 367, rue Gratien-Gélinas, Rimouski, Québec, Canada;4. Fisheries and Oceans Canada, Gulf Region, Moncton, New Brunswick, Canada;1. Key Laboratory of Marine Biotechnology of Guangdong Province, Institute of Marine Science, Shantou University, Shantou 515063, China;2. Research Center for Subtropical Mariculture Engineering Technology of Guangdong Province, Shantou 515063, China;3. STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou 515063, China |
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| Abstract: | Shell strength development of the scallop Pecten maximus collected from wild stocks and from suspended cultures was described over the culture period when most of the growth takes place (20–110 mm shell height). Shell strength, shell height and shell thickness were determined in scallops of age groups 2–5 years. Wild and cultured scallops showed a strong divergence in shell strength development in scallops older than age group 3, which was not reflected in the concurrent development of shell height and thickness, indicating that factors other than shell height and shell thickness explain the differences in observed shell strength. In wild scallops, shell height, shell thickness and age accounted for about 65% of the variation in shell strength, while the same variables accounted for about 30% in cultured scallops. Wild scallops had stronger shells than the cultured scallops of the same size (53–68 mm shell height) grown at the same site, suggesting that factors related to suspended culture could explain the weak shells in cultured scallops. The results indicate that conditions related to suspended culture can have a negative impact on shell strength development in P. maximus. As the shell is the primary protection against decapod predation in scallops, a better understanding of what affects the shell strength is of importance for the development of release strategies in bottom culture of P. maximus. |
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