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MEPS 167:171-175 (1998)
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Abstract
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Settlement of the muricid Concholepas concholepas and its relationship with El Niño and coastal upwellings in southern Chile
C. A. Moreno1,*, G. Asencio1, W. E. Duarte1, V. Marín2
1Instituto de Ecología y Evolución, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
2Depto. Cs. Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
*E-mail: cmoreno@uach.cl
ABSTRACT: The settlement of Concholepas concholepas (Brugière, 1789) (Gastropoda; Muricidae) was monitored in the intertidal zone in front of the Marine Reserve of Mehuin in Maiquillahue Bay, south-central Chile, from 1989 to 1997. Data appeared correlated
to the SOI (Southern Oscillation Index) and the occurrence of local upwelling as detected from satellite images. Greatest settlement density was linked to the coupling of upwelling between February and April, coinciding with the occurrence of the first
stages of larval development (which hatch from benthic capsules as a late veliger stage). These conditions co-occur when the mean value of the SOI over the 3 mo prior to the beginning of the settlement period approximates zero.
KEY WORDS: Settlement · Recruitment · Concholepas concholepas · El Niño · Upwelling · Chile
Published in MEPS Vol.
167
(1998) on June 18
ISSN: 0171-8630.
Copyright © Inter-Research, Oldendorf/Luhe, 1998
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