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Geographic distribution and description of four pelagic barnacles along the south east Pacific coast of Chile - a zoogeographical approximation

Citation

Hinojosa Toledo, IA and Boltana, S and Lancellotti, D and Macaya, E and Ugalde, P and Valdivia, N and Vasquez, N and Newman, WA and Thiel, M, Geographic distribution and description of four pelagic barnacles along the south east Pacific coast of Chile - a zoogeographical approximation, Revista Chilena de Historia Natural, 79, (1) pp. 13-27. ISSN 0716-078X (2006) [Refereed Article]

Copyright Statement

Copyright 2006 Sociedad de Biología de Chile.

DOI: doi:10.4067/S0716-078X2006000100002

Abstract

The majority of zoogeographic studies along the Chilean Pacific coast have focused on benthic organisms and oceanographic conditions are considered the main factors influencing their distributions. Herein we examined the geographic distribution of pelagic barnacles of the family Lepadidae collected from floating macroalgae at seven sampling areas between 23 and 50° S. Four species were encountered and they are briefly described herein. The most abundant northern species was Lepas anatifera, and it diminished in abundance towards the south (33° S). Moreover, this species was not found in waters with a sea surface temperature (SST) of less than ~18 ºC. Lepas australis, primarily a circumpolar West Wind Drift species, diminished in abundance towards the north (33° S). This species was restricted to waters of < 18 ºC SST. A third species, L. pectinata, was encountered throughout almost the entire study area, but it was most abundant between 29 and 33° S. The fourth species, Dosima fascicularis, was only found at two sampling areas, namely at 27° S and 33° S, and this is the first record of this species from the central coast of Chile. The distributional pattern of the pelagic barnacles found herein corresponds to the three main zoogeographic regions as revealed by the majority of previous studies based on littoral organisms: the northern Peru-Chilean Province, the southern Magellanic Province, and the central Chilean Transition Zone where the two provinces overlap. Even though the present study only considers four species of pelagic barnacles, the results support the hypotheses on the importance of oceanographic conditions (in particular SST) in determining the zoogeographic patterns along the south east Pacific coast of Chile.

Item Details

Item Type:Refereed Article
Keywords:zoogeography, Lepas, oceanography, pelagic, Cirripedia
Research Division:Biological Sciences
Research Group:Evolutionary Biology
Research Field:Biogeography and Phylogeography
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Marine Flora, Fauna and Biodiversity
Author:Hinojosa Toledo, IA (Mr Ivan Hinojosa)
ID Code:88982
Year Published:2006
Web of Science® Times Cited:22
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2014-02-21
Last Modified:2014-06-12
Downloads:0

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