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Revista chilena de historia natural

Print version ISSN 0716-078X

Abstract

QUIJADA, PABLO A  and  CACERES M, CRISTIAN W.. Abundance, trophic composition and spatial distribution of the intertidal fish assemblage of South-central Chile. Rev. chil. hist. nat. [online]. 2000, vol.73, n.4, pp.739-747. ISSN 0716-078X.  http://dx.doi.org/10.4067/S0716-078X2000000400016.

On the coast of South-central Chile, a number of studies have been undertaken focusing on the biology of economically important pelagic fishes. In contrast, the knowledge of coastal fishes is scarce. In the present study, we analysed the patterns of abundance, distribution and trophic composition of the intertidal fish assemblage that inhabits rocky intertidal areas along the coast of the Eighth Region. This zone was sampled periodically between September 1998, and January 1999. A total of 374 individuals belonging to 13 species and 8 families were captured. The clingfish Gobiesox marmoratus (Gobiesocidae) was the most abundant species in this zone followed by Calliclinus geniguttatus (Labrisomidae), which together made up 54 % of the total number of fish found. The remaining species belonged to the families Blenniidae, Labrisomidae, Clinidae, Bovichthydae, Tripterygiidae, Ophiididae and Nototheniidae. The presence of juvenile individuals mainly G. marmoratus, indicate that the rocky intertidal areas are very important zones for recruitment. The trophic analysis of this assemblage showed that the majority of the species studied are carnivores that feed principally on gastropods and crustaceans, with the exception of the herbivorous Scartichthys viridis, and the omnivorous Hypsoblennius sordidus

Keywords : Intertidal fishes; nursery areas; trophic ecology; distribution.

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