Flounder growth and production as indicators of the nursery value of marsh habitats in a Mediterranean lagoon |
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| Institution: | 1. Dep. Environmental Sciences, University of Venice, Castello 2737/B — 30122 Venezia, Italy;2. Laguna Project s.n.c, Castello 6411 — 30122 Venezia, Italy;1. Department of Food and Nutrition, Japan Women’s University, 2-8-1, Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan;2. Biochemical Engineering, DECHEMA Research Institute, Theodor-Heuss-Allee 25, 60486 Frankfurt/Main, Germany;3. Institute of Microbiology, ETH Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland;4. Biosynthesis Group, Institute of Molecular Biosciences, Goethe University, Max von Laue Str. 9, 60438 Frankfurt/Main, Germany;1. Department of Health, Animal Science and Food Safety, Università degli Studi di Milano, St. Trentacoste 2, 20134, Milan, Italy;2. Morphogenyx Inc, PO Box 717, East Northport, NY, 11731, USA;3. Consortium of Fishing Cooperatives of the Polesine, Scardovari, St. Borsa 11, 45018 Rovigo, Italy;4. Department of Life Sciences & Biotechnology, University of Ferrara, St. Borsari 46, 44121, Ferrara, Italy;1. University of Connecticut, Department of Pathobiology and Veterinary Science, Storrs, CT, USA;2. University of Connecticut, Center for Environmental Sciences and Engineering, Storrs, CT, USA;3. Roger Williams University, Department of Biology, Marine Biology, and Environmental Science, Bristol, RI, USA;4. University of Connecticut, Department of Marine Sciences, Groton, CT, USA;5. Connecticut Sea Grant College Program, Groton, CT, USA;1. Instituto de Investigaciones Forestales y Agronómicas Bariloche (IFAB), (Instituto Nacional de Tecnología Agropecuaria - Consejo Nacional de Investigaciones Científicas y Técnicas), Modesta Victoria 4450, San Carlos de Bariloche, Rio Negro R8402DVZ, Argentina;2. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales (IPATEC), (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional del Comahue), Av. de los Pioneros 2350, San Carlos de Bariloche, Argentina;3. Instituto de Agrobiotecnología y Biología Molecular (IABIMO), (Instituto Nacional de Tecnología Agropecuaria - Consejo Nacional de Investigaciones Científicas y Técnicas), Nicolás Repetto y de Los Reseros s/n, Hurlingham, Buenos Aires B1686K6, Argentina;4. Instituto de Investigaciones en Biodiversidad y Medioambiente, (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional del Comahue), Quintral 1250, San Carlos de Bariloche, Río Negro R8400FRF, Argentina;1. Laboratory of Zoology and Marine Biology, Department of Biological and Environmental Sciences and Technologies, University of Salento, CoNISMa, I-73100 Lecce, Italy;2. Department of Life Science and Biotechnologies, University of Ferrara, I-44100 Ferrara, Italy |
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| Abstract: | Estuarine marshes are known as suitable nursery areas for many marine migrant fishes, such as flounder. The potential nursery value of such habitats was investigated in the Venice lagoon, by using growth and production of 0-group flounder as indicators. Size–frequency distribution analysis was performed on fish samples collected fortnightly, from March 2004 to June 2005, in two marsh sites, Dese and Tessera, differing in their origin and environmental conditions. Samples were mostly composed of juvenile individuals, belonging to 0- and 1-group cohorts (the latter being present in Tessera only). A higher total production, either annual or monthly, and faster growth of 0-group flounder was observed in Dese, associated to a higher ecological performance of 0-group individuals in this site, as indicated by the higher P:B ratio values. Dese is a site located in a marsh complex characterized by the relevant influence of a nearby river, and the observed higher potential nursery value of this marsh area with respect to the other is discussed in the light of the higher trophic status and other environmental conditions in this site. The production results were also compared to those from other estuarine environments commonly acknowledged as important nurseries for European flounder. |
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