© 2005 International Council for the Exploration of the Sea
Variations in the distributions of Centropages chierchiae and Temora stylifera (Copepoda: Calanoida) in the north-eastern Atlantic Ocean and western European shelf waters
a Sir Alister Hardy Foundation for Ocean Science, The Laboratory Citadel Hill, Plymouth PL1 2PB, England, UK
b Institute of Marine Studies, University of Plymouth Drake Circus, Plymouth PL4 8AA, England, UK
*Correspondence to J. A. Lindley: tel: +44 1752 633133; fax: +44 1752 600015. e-mail: jal{at}sahfos.ac.uk.
Centropages chierchiae and Temora stylifera occurred rarely in the Continuous Plankton Recorder (CPR) survey in the Bay of Biscay, Celtic Sea, and English Channel before 1988. By 2000 they were found frequently and in abundance. The seasonal cycles of abundance of these species differ, C. chierchiae occurring mainly in the summer while T. stylifera was found most frequently in late autumn or winter towards the northern limits of its distribution. The increase in abundance of both species is related to temperature. However, in the years when it was found in the samples, the frequency of occurrence of C. chierchiae was correlated positively with the strength of the shelf edge current and negatively with the North Atlantic Oscillation (NAO) while the reverse was true for T. stylifera.
Keywords: Bay of Biscay, Celtic Sea, climate change, copepods, distributions, English Channel, seasonal cycles, zooplankton
Received 3 September 2004; accepted 23 February 2005.
1 Present address: 11 Rother Close, Storrington, Pulborough, West Sussex RH20 3NX, England, UK.
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