Distribution of cephalopod paralarvae in relation to the regional oceanography of the western Iberia

Moreno, A., Dos Santos, A., Piatkowski, Uwe, Santos, A.M.P. and Cabral, H. (2009) Distribution of cephalopod paralarvae in relation to the regional oceanography of the western Iberia Journal of Plankton Research, 31 (1). pp. 73-91. DOI 10.1093/plankt/fbn103.

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The present study analyses the distribution of cephalopod paralarvae off the Portuguese coast. The effects of temporal and physical variables on Loligo vulgaris, Octopus vulgaris, sepiolid and ommastrephid abundances are analysed with generalized linear models. Their distribution patterns are discussed in relation to mesoscale features, including currents, thermal fronts and coastal upwelling cross-shelf transport, prevailing in the western Iberia upwelling system. Paralarvae of the neritic species occur during a considerably extended period of the year with two or three abundance peaks within the highly productive upwelling system of the western Portuguese coast and contrasting with the Gulf of Cadiz area. Temperature and upwelling were shown to be the most important variables in modulating seasonality and distribution of these paralarvae. The influence of the physical environment is particularly pronounced for the paralarvae of O. vulgaris, following distinct patterns according to the oceanography of the western Iberia and the Gulf of Cadiz systems. The paralarvae of oceanic species, which in many cases have their northern limit of distribution at these latitudes, were mainly found in the southern part of the sampling area. The distribution of these species indicates that the prevailing oceanographic features of the Gulf of Cadiz system, especially fronts, together with temperature act as boundaries to geographic dispersal, contributing to an area of high cephalopod biodiversity in the southern Portuguese waters.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Evolutionary Ecology of Marine Fishes
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1093/plankt/fbn103
ISSN: 1464-3774
Projects: Future Ocean
Date Deposited: 15 Dec 2008 09:46
Last Modified: 23 May 2016 11:02
URI: http://eprints.uni-kiel.de/id/eprint/7625

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