Patrones de riesgo e implicancias de la presencia de <i>Contracaecum</i> sp. (Nematoda, anisakidae) en pejerrey <i>Odontesthes bonariensis</i> (Pisces, atherinopsidae)

Several internal and external parasites have been reported in the wild population of the pejerrey, Odontesthes bonariensis, although most of previous studies have focused on taxonomy. The aims of this research were to describe the seasonal variation and the age prevalence pattern of the nematode Con...

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Detalles Bibliográficos
Autores principales:	Mancini, M., Nicola, I., Larriestra, A., Salinas, V., Bucco, C.
Formato:	Articulo
Lenguaje:	Español
Publicado:	2006
Materias:	Ciencias Naturales Peces Nematodos pejerrey, Contracaecum sp., ecology, relative weight
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/69486
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-69486
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Español
topic	Ciencias Naturales Peces Nematodos pejerrey, Contracaecum sp., ecology, relative weight
spellingShingle	Ciencias Naturales Peces Nematodos pejerrey, Contracaecum sp., ecology, relative weight Mancini, M. Nicola, I. Larriestra, A. Salinas, V. Bucco, C. Patrones de riesgo e implicancias de la presencia de <i>Contracaecum</i> sp. (Nematoda, anisakidae) en pejerrey <i>Odontesthes bonariensis</i> (Pisces, atherinopsidae)
topic_facet	Ciencias Naturales Peces Nematodos pejerrey, Contracaecum sp., ecology, relative weight
description	Several internal and external parasites have been reported in the wild population of the pejerrey, Odontesthes bonariensis, although most of previous studies have focused on taxonomy. The aims of this research were to describe the seasonal variation and the age prevalence pattern of the nematode Contracaecum sp., and to characterize the association between the pejerrey parasitic infestation with body condition score. Four samples, one per season, were collected during the years 2002 and 2003 in a shallow lake located in the southern area of Cordoba, Argentina (34° 36’S, 64° 24’W). The fishes caught were subject to age estimation using the Von Bertalanffy’s equation, the assessment of the relative weight (Wr) and the determination of abundance and intensity of the parasite infestation. The standard length average (n = 283) was 185,5 mm (range 38 - 380). The proportion of fishes with at least one parasite was 10,1%. The highest abundance (0,94) and prevalence (24,6%) were observed in summer, and the highest average intensity in autumn (5,7 parasites /fish). Fishes > 2 years old showed 5,99 more times (odds ratio IC95% 2,41 - 14,84) of being parasited with Contracaecum sp. in comparison to younger fishes. The Wr was lower for infested fishes (85,45; IC95% 81,82 - 89,08) in comparison to non infested specymens even after the statistical adjustment for season and age effects. Since Contracaecum sp. is zoonotic, the prevalence reported may pose a risk to humans due to the common habits of consuming uncontrolled fishes in recreational fisheries. In addition to that, parasitic infestation may also reduce body condition in fishes of commercial size.
format	Articulo Articulo
author	Mancini, M. Nicola, I. Larriestra, A. Salinas, V. Bucco, C.
author_facet	Mancini, M. Nicola, I. Larriestra, A. Salinas, V. Bucco, C.
author_sort	Mancini, M.
title	Patrones de riesgo e implicancias de la presencia de <i>Contracaecum</i> sp. (Nematoda, anisakidae) en pejerrey <i>Odontesthes bonariensis</i> (Pisces, atherinopsidae)
title_short	Patrones de riesgo e implicancias de la presencia de <i>Contracaecum</i> sp. (Nematoda, anisakidae) en pejerrey <i>Odontesthes bonariensis</i> (Pisces, atherinopsidae)
title_full	Patrones de riesgo e implicancias de la presencia de <i>Contracaecum</i> sp. (Nematoda, anisakidae) en pejerrey <i>Odontesthes bonariensis</i> (Pisces, atherinopsidae)
title_fullStr	Patrones de riesgo e implicancias de la presencia de <i>Contracaecum</i> sp. (Nematoda, anisakidae) en pejerrey <i>Odontesthes bonariensis</i> (Pisces, atherinopsidae)
title_full_unstemmed	Patrones de riesgo e implicancias de la presencia de <i>Contracaecum</i> sp. (Nematoda, anisakidae) en pejerrey <i>Odontesthes bonariensis</i> (Pisces, atherinopsidae)
title_sort	patrones de riesgo e implicancias de la presencia de <i>contracaecum</i> sp. (nematoda, anisakidae) en pejerrey <i>odontesthes bonariensis</i> (pisces, atherinopsidae)
publishDate	2006
url	http://sedici.unlp.edu.ar/handle/10915/69486
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Patrones de riesgo e implicancias de la presencia de <i>Contracaecum</i> sp. (Nematoda, anisakidae) en pejerrey <i>Odontesthes bonariensis</i> (Pisces, atherinopsidae)

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