© 2003 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
Tagging juvenile seabass and sole with telemetry transmitters: medium-term effects on growth
a Centre de Recherche sur les Ecosystèmes Marins et Aquacoles, CNRS/IFREMER B.P. 5, F 17137 L'Houmeau, France
b IFREMER, Chemin de Maguelone F 34250 Palavas, France
*Correspondence to M. L. Bégout Anras. e-mail: mlbegout{at}ifremer.fr.
The effects of tagging with acoustic transmitters on the growth of juvenile seabass, Dicentrarchus labrax (L.) (initial mean mass±SD, 173 g ± 23.4) in a 47 d tank experiment, and sole, Solea solea (L.) (103.2 g ± 14.8) in a 72 d tank experiment and (104.0 g ± 18.4) in a 58 d salt marsh mesocosm experiment were examined. Twenty externally tagged seabass grew more slowly than the 20 with surgically implanted tags, which reached the same mass as nine control fish. Movements of the external transmitter's harness caused abrasions of the skin and loss of the tag in 60% of the cases. We thus recommend implanting transmitters for telemetry studies of juvenile seabass weighing between 120 and 214 g and carrying a tag that represents 2.22.5% of body mass. Both tank and mesocosm experiments conducted on juvenile sole concluded that the externally attached tag retention rate was good, but at the expense of the fish growth rate.
Keywords: adaptation, juvenile fish, marking techniques, telemetry
Received 21 January 2003; accepted 28 May 2003.
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