Diet and parasites of the insular fish Scartichthys variolatus (Blenniidae) from Robinson Crusoe Island, Chile: How different is this from two continental congeneric species?

This study analyzed the diet and parasites of an insular blenniid fish, Scartichthys variolatus, and then compared that with data published for two congeneric species from the South American Pacific coast, S. viridis and S. gigas. Fifty-two specimens of fish were collected during 2008 and 2009 from...

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Autores principales:	Díaz,Pablo E, Muñoz,Gabriela
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2010
Materias:	Juan Fernández Archipelago parasite dispersion Blenniid fishes parasite species richness
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000200011
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spelling	oai:scielo:S0718-195720100002000112010-09-14Diet and parasites of the insular fish Scartichthys variolatus (Blenniidae) from Robinson Crusoe Island, Chile: How different is this from two continental congeneric species?Díaz,Pablo EMuñoz,Gabriela Juan Fernández Archipelago parasite dispersion Blenniid fishes parasite species richness This study analyzed the diet and parasites of an insular blenniid fish, Scartichthys variolatus, and then compared that with data published for two congeneric species from the South American Pacific coast, S. viridis and S. gigas. Fifty-two specimens of fish were collected during 2008 and 2009 from the intertidal zone of the Robinson Crusoe Island, about 700 km off the coast of central Chile. The most frequent food items in all the fish analyzed were algae. Just two specimens of S. variolatus (3.8%) were parasitized only by the nematode Pseudodelphis chilensis. Despite the fact that all Scartichthys spp. are herbivorous, and the diet was composed of similar species, there were differences in frequencies of some of the algae, maily in Chaetomorpha sp. and Polysiphonia sp. The low parasite species richness of S. variolatus contrasts with that of the continental congeneric species, S. viridis with 13 parasite species, and S. gigas with 13 species. Therefore, the diet of these fishes can not explain differences in their parasite composition, so it is possible that environmental conditions, and the distance between the location of Robinson Crusoe Island and the South American coast, had limited dispersal and distribution of hosts and parasites over time.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.45 n.2 20102010-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000200011en10.4067/S0718-19572010000200011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Juan Fernández Archipelago parasite dispersion Blenniid fishes parasite species richness
spellingShingle	Juan Fernández Archipelago parasite dispersion Blenniid fishes parasite species richness Díaz,Pablo E Muñoz,Gabriela Diet and parasites of the insular fish Scartichthys variolatus (Blenniidae) from Robinson Crusoe Island, Chile: How different is this from two continental congeneric species?
description	This study analyzed the diet and parasites of an insular blenniid fish, Scartichthys variolatus, and then compared that with data published for two congeneric species from the South American Pacific coast, S. viridis and S. gigas. Fifty-two specimens of fish were collected during 2008 and 2009 from the intertidal zone of the Robinson Crusoe Island, about 700 km off the coast of central Chile. The most frequent food items in all the fish analyzed were algae. Just two specimens of S. variolatus (3.8%) were parasitized only by the nematode Pseudodelphis chilensis. Despite the fact that all Scartichthys spp. are herbivorous, and the diet was composed of similar species, there were differences in frequencies of some of the algae, maily in Chaetomorpha sp. and Polysiphonia sp. The low parasite species richness of S. variolatus contrasts with that of the continental congeneric species, S. viridis with 13 parasite species, and S. gigas with 13 species. Therefore, the diet of these fishes can not explain differences in their parasite composition, so it is possible that environmental conditions, and the distance between the location of Robinson Crusoe Island and the South American coast, had limited dispersal and distribution of hosts and parasites over time.
author	Díaz,Pablo E Muñoz,Gabriela
author_facet	Díaz,Pablo E Muñoz,Gabriela
author_sort	Díaz,Pablo E
title	Diet and parasites of the insular fish Scartichthys variolatus (Blenniidae) from Robinson Crusoe Island, Chile: How different is this from two continental congeneric species?
title_short	Diet and parasites of the insular fish Scartichthys variolatus (Blenniidae) from Robinson Crusoe Island, Chile: How different is this from two continental congeneric species?
title_full	Diet and parasites of the insular fish Scartichthys variolatus (Blenniidae) from Robinson Crusoe Island, Chile: How different is this from two continental congeneric species?
title_fullStr	Diet and parasites of the insular fish Scartichthys variolatus (Blenniidae) from Robinson Crusoe Island, Chile: How different is this from two continental congeneric species?
title_full_unstemmed	Diet and parasites of the insular fish Scartichthys variolatus (Blenniidae) from Robinson Crusoe Island, Chile: How different is this from two continental congeneric species?
title_sort	diet and parasites of the insular fish scartichthys variolatus (blenniidae) from robinson crusoe island, chile: how different is this from two continental congeneric species?
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000200011
work_keys_str_mv	AT diazpabloe dietandparasitesoftheinsularfishscartichthysvariolatusblenniidaefromrobinsoncrusoeislandchilehowdifferentisthisfromtwocontinentalcongenericspecies AT munozgabriela dietandparasitesoftheinsularfishscartichthysvariolatusblenniidaefromrobinsoncrusoeislandchilehowdifferentisthisfromtwocontinentalcongenericspecies
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Diet and parasites of the insular fish Scartichthys variolatus (Blenniidae) from Robinson Crusoe Island, Chile: How different is this from two continental congeneric species?

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