First record of parasites of Dosidicus gigas (d' Orbigny, 1835) (Cephalopoda: Ommastrephidae) from the Humboldt Current system off Chile

The parasitic fauna of 124 jumbo squids (Dosidicus gigas) caught from oceanic and coastal waters off Central Chile (32ºS-40ºS) was described and quantified. The 97% of the squids harboured at least one parasitic taxon. Prevalence of infection and abundance were established for each parasite species....

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Autores principales:	Pardo-Gandarillas,M. Cecilia, Lohrmann,Karin B, Valdivia,Ana L, Ibáñez,Christian M
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2009
Materias:	Jumbo squid helminth fauna southeastern Pacific
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000200013
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spelling	oai:scielo:S0718-195720090002000132010-04-08First record of parasites of Dosidicus gigas (d' Orbigny, 1835) (Cephalopoda: Ommastrephidae) from the Humboldt Current system off ChilePardo-Gandarillas,M. CeciliaLohrmann,Karin BValdivia,Ana LIbáñez,Christian M Jumbo squid helminth fauna southeastern Pacific The parasitic fauna of 124 jumbo squids (Dosidicus gigas) caught from oceanic and coastal waters off Central Chile (32ºS-40ºS) was described and quantified. The 97% of the squids harboured at least one parasitic taxon. Prevalence of infection and abundance were established for each parasite species. Each parasitic taxon was described based on light microscopy and scanning electron microscopy images. The parasitic fauna was composed of larval cestodes: Hepatoxylon trichiuri (Abundance: 2.6; Prevalence: 70.2%), Tentacularia coryphaenae (Abundance: 0.1; Prevalence: 5.6%), a Tetraphyllidean plerocercoid (Abundance: 9.1; Prevalence: 83.1%), Pelichnibothrium speciosum and the nematodes Anisakis Type I (Abundance: 0.06; Prevalence: 6.5%) and Anisakis Type II (Abundance: 0.52; Prevalence: 17.7%). Around nine taxa have been reported in D. gigas smaller than 40 cm mantle length, five of them were found in this study (Tetraphyllidean plerocercoid, Tentacularia coryphaenae, Pelichnibothrium speciosum, and Anisakis Type I and II), however, in bigger squids. The parasite H. trichiuri is a new record for D. gigas in these latitudes of the South Pacific, comprising the southern limit of its distribution range. The Tetraphyllidea plerocercoid could correspond to Phyllobothrium based on the shape and tissues of its apical organ, which is very similar to the accesory suckers. The nematodes Anisakis Type I and II can only be distinguished by the tail shape and presence-absence of a mucron. It is suggested to carry out molecular analysis for diagnosis of larval stages when morphological characters are lacking.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.44 n.2 20092009-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000200013en10.4067/S0718-19572009000200013
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Jumbo squid helminth fauna southeastern Pacific
spellingShingle	Jumbo squid helminth fauna southeastern Pacific Pardo-Gandarillas,M. Cecilia Lohrmann,Karin B Valdivia,Ana L Ibáñez,Christian M First record of parasites of Dosidicus gigas (d' Orbigny, 1835) (Cephalopoda: Ommastrephidae) from the Humboldt Current system off Chile
description	The parasitic fauna of 124 jumbo squids (Dosidicus gigas) caught from oceanic and coastal waters off Central Chile (32ºS-40ºS) was described and quantified. The 97% of the squids harboured at least one parasitic taxon. Prevalence of infection and abundance were established for each parasite species. Each parasitic taxon was described based on light microscopy and scanning electron microscopy images. The parasitic fauna was composed of larval cestodes: Hepatoxylon trichiuri (Abundance: 2.6; Prevalence: 70.2%), Tentacularia coryphaenae (Abundance: 0.1; Prevalence: 5.6%), a Tetraphyllidean plerocercoid (Abundance: 9.1; Prevalence: 83.1%), Pelichnibothrium speciosum and the nematodes Anisakis Type I (Abundance: 0.06; Prevalence: 6.5%) and Anisakis Type II (Abundance: 0.52; Prevalence: 17.7%). Around nine taxa have been reported in D. gigas smaller than 40 cm mantle length, five of them were found in this study (Tetraphyllidean plerocercoid, Tentacularia coryphaenae, Pelichnibothrium speciosum, and Anisakis Type I and II), however, in bigger squids. The parasite H. trichiuri is a new record for D. gigas in these latitudes of the South Pacific, comprising the southern limit of its distribution range. The Tetraphyllidea plerocercoid could correspond to Phyllobothrium based on the shape and tissues of its apical organ, which is very similar to the accesory suckers. The nematodes Anisakis Type I and II can only be distinguished by the tail shape and presence-absence of a mucron. It is suggested to carry out molecular analysis for diagnosis of larval stages when morphological characters are lacking.
author	Pardo-Gandarillas,M. Cecilia Lohrmann,Karin B Valdivia,Ana L Ibáñez,Christian M
author_facet	Pardo-Gandarillas,M. Cecilia Lohrmann,Karin B Valdivia,Ana L Ibáñez,Christian M
author_sort	Pardo-Gandarillas,M. Cecilia
title	First record of parasites of Dosidicus gigas (d' Orbigny, 1835) (Cephalopoda: Ommastrephidae) from the Humboldt Current system off Chile
title_short	First record of parasites of Dosidicus gigas (d' Orbigny, 1835) (Cephalopoda: Ommastrephidae) from the Humboldt Current system off Chile
title_full	First record of parasites of Dosidicus gigas (d' Orbigny, 1835) (Cephalopoda: Ommastrephidae) from the Humboldt Current system off Chile
title_fullStr	First record of parasites of Dosidicus gigas (d' Orbigny, 1835) (Cephalopoda: Ommastrephidae) from the Humboldt Current system off Chile
title_full_unstemmed	First record of parasites of Dosidicus gigas (d' Orbigny, 1835) (Cephalopoda: Ommastrephidae) from the Humboldt Current system off Chile
title_sort	first record of parasites of dosidicus gigas (d' orbigny, 1835) (cephalopoda: ommastrephidae) from the humboldt current system off chile
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000200013
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First record of parasites of Dosidicus gigas (d' Orbigny, 1835) (Cephalopoda: Ommastrephidae) from the Humboldt Current system off Chile

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