The migration patterns of the European flounder Platichthys flesus (Linnaeus, 1758) (Pleuronectidae,Pisces) at the southern limit of its distribution range: Ecological implications and fishery management |
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| Authors: | Pedro Morais Ester Dias John Babaluk Carlos Antunes |
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| Affiliation: | 1. NIOZ Royal Netherlands Institute for Sea Research, Department of Coastal Systems, and Utrecht University, P.O. Box 59, 1790, AB, Den Burg, Texel, the Netherlands;2. CIIMAR Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal;1. Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan;2. National Research Institute of Fisheries and Environment of Inland Sea, Japan Fisheries Research and Education Agency, Hatsukaichi, Hiroshima 739-1452, Japan;1. National Research Institute of Fisheries and Environment of Inland Sea, Japan Fisheries Research and Education Agency, 2-17-5 Maruishi, Hatsukaichi, Hiroshima 739-0452, Japan;2. National Research Institute of Fisheries Engineering, Japan Fisheries Research and Education Agency, 7620-7 Hasaki, Kamisu-shi, Ibaraki 314-0408, Japan;3. Faculty of Science and Technology, Oita University, 700 Dannoharu, Oita 870-1192, Japan;4. Chiba Prefectural Fisheries Research Center, 2492 Chikura-cho Hiraiso, Minamiboso, Chiba 295-0024, Japan;5. Kanagawa Prefectural Fisheries Technology Center, 119 Jogashima, Misaki-cho, Miura, Kanagawa 238-0237, Japan |
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| Abstract: | This study aims to determine the diversity of migration patterns of the European flounder (Platichthys flesus (Linnaeus, 1758)) present in the Minho estuary and in the adjacent coastal area (NW-Iberian Peninsula). Assessing the diversity of flounder migration patterns at the southern limit of its distribution allows the determination of characteristics of the species' ecology and provides useful information for fishery managers, since it is a regionally important estuarine fishery. An unexpected result of our study was that flounder appears to spawn in both estuarine and coastal areas and not just in coastal areas as was previously widely accepted. Our interpretation of otolith strontium distribution patterns from flounder specimens collected in the freshwater tidal area of the Minho estuary and in the lower estuary suggested that the flounders hatched in the estuary, while only 6.7% of those captured in the coastal area hatched in the coastal area. Ultimately, studies aimed at collecting larval stages and adult flounders must be made to confirm that flounders spawn in the estuary and to define new and better scientifically supported fishing policies, or simply to confirm the existing ones regarding temporal and spatial closures for each gear used in the Minho estuary. |
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