© 2003 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
Spatial and temporal patterns of cuttlefish (Sepia officinalis) abundance and environmental influences a case study using trawl fishery data in French Atlantic coastal, English Channel, and adjacent waters
a Department of Zoology, University of Aberdeen Tillydrone Avenue, Aberdeen AB24 2TZ, Scotland, UK
b Laboratoire de Biologie et Biotechnologies Marines, Université de Caen 14032 Caen Cedex, France
*Correspondence to Jianjun Wang; tel: +44 1224 273796; fax: +44 1224 272396. e-mail: j.wang{at}abdn.ac.uk.
The spatial and temporal distribution patterns of cuttlefish abundance and the relationships between cuttlefish abundance and environmental variables in the French Atlantic coast, the English Channel, and adjacent waters were studied using both geographical information system and statistical methods. Cuttlefish have a clear general annual migration pattern, consistently occurring in broadly the same areas in different years. The strength of the Atlantic currents into the west part of the English Channel and the south part of the Celtic Sea may be the dominant influence on the timing of cuttlefish migration to these areas. Local abundance shows a positive correlation with SST, although it is difficult to determine if this reflects any causal link. Cuttlefish expand their distribution further north in the spawning season in warm years and shift south in cool years. The centre of high abundance in offshore deep water shifts north in warm winters and south in cool winters.
Keywords: cuttlefish, environment, GIS
Received 20 August 2002; accepted 26 March 2003.
1 Present address for J. M. Bellido: Instituto Español de Oceanografía (IEO), P.O. Box 1552, 36200 Vigo, Spain.
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