Spatial and seasonal variation in density,reproductive status,length and phenolic content of the invasive brown macroalga Sargassum muticum (Yendo) Fensholt along the coast of Western Brittany (France) |
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| Institution: | 1. School of Biosciences, Taylor''s University, No. 1 Jalan Taylor''s, 47500 Subang Jaya, Selangor Darul Ehsan, Malaysia;2. Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia;1. Institut sur la nutrition et les aliments fonctionnels (INAF), Département des sciences des aliments, Université Laval, 2425 rue de l''Agriculture, Québec, Québec G1V 0A6, Canada;2. Collectif de Recherche Appliquée aux Bioprocédés et à la chimie de l''Environnement (CRABE), Université du Québec à Rimouski, 300 allée des Ursulines, Rimouski, Québec G5L 3A1, Canada |
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| Abstract: | The introduced macroalga Sargassum muticum (Yendo) Fensholt is currently observed along the coasts of Brittany. From February 2003 till June 2004, variations in density, reproductive status, length and phenolic content were assessed at three sites. Seasonal variability of the density was pronounced at two exposed sites (Fort Bloqué and Pointe du Diable), but absent at the sheltered site (Callot), where the macroalga was observed year-round. Thalli were generally longer in Summer (up to 73.2 ± 2.7 cm at Fort Bloqué), and had reproductive receptacles from May to September at Pointe du Diable, though only from June to September in the other stations (Callot and Fort Bloqué). Phenolic content was maximal during the reproductive period, which could be interpreted as chemical protection of the receptacles. Finally the collected data were used to explain the persistence of S. muticum and its proliferation in Brittany. |
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