Helminth Community Structure of Chirostoma attenuatum (Osteichthyes: Atherinidae)in Two Mexican Lakes

Helminth community structure of Chirostoma attenuatum from two lakes of Michoacan State, Mexico, was analyzed and compared. Helminths from 72 fish were counted and collected for taxonomical determination. Helminthological record of C. attenuatum includes five species, three of them shared by fishes...

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Veröffentlicht in:The Southwestern naturalist 1996-09, Vol.41 (3), p.288-292
Hauptverfasser: Espinosa-Huerta, Elsa, García-Prieto, Luis, De León, Gerardo Pérez-Ponce
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creator Espinosa-Huerta, Elsa
García-Prieto, Luis
De León, Gerardo Pérez-Ponce
description Helminth community structure of Chirostoma attenuatum from two lakes of Michoacan State, Mexico, was analyzed and compared. Helminths from 72 fish were counted and collected for taxonomical determination. Helminthological record of C. attenuatum includes five species, three of them shared by fishes of both localities. Helminth communities are considered to be isolationist and depauperate due to the low values of richness, abundance and diversity obtained; the digenean Postho-diplostomum minimum was the species numerically dominant. We conclude that the differences observed in helminth community structure between localities are due to differential biotic and abiotic conditions; in Patzcuaro Lake, conditions favor the increase of fish-eating bird populations chat serve as definitive hosts to allogenic species such as P. minimum. /// La estructura de 1a comunidad de helmintos de Chirostoma attenuatum de dos lagos del Estado de Michoacán, México es analizada y comparada en este trabajo. Los helmintos de 72 peces fueron contados y removidos para su determinación taxonómica. El registro helminiológico para attenuatum incluye cinco especies, tres de las cuales son compartidas por los peces de ambas localidades. Las comunidades de helmintos son consideradas como aislacionistas y depauperadas por los bajos valores obtenidos de riqueza, abundancia y diversidad, siendo el tremátodo P. minimum, 1a especie dominante. Concluímos que las diferencias observadas entre Ias dos localidades son debidas a las distintas condiciones bióticas y abióticas encontradas; en el Lago de Pátzcuaro, tales condiciones favorecen el incremento en las poblaciones de aves ictiófagas que actúan como hospederos definitivos de especies alogénicas tales como P. minimum.
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Helminths from 72 fish were counted and collected for taxonomical determination. Helminthological record of C. attenuatum includes five species, three of them shared by fishes of both localities. Helminth communities are considered to be isolationist and depauperate due to the low values of richness, abundance and diversity obtained; the digenean Postho-diplostomum minimum was the species numerically dominant. We conclude that the differences observed in helminth community structure between localities are due to differential biotic and abiotic conditions; in Patzcuaro Lake, conditions favor the increase of fish-eating bird populations chat serve as definitive hosts to allogenic species such as P. minimum. /// La estructura de 1a comunidad de helmintos de Chirostoma attenuatum de dos lagos del Estado de Michoacán, México es analizada y comparada en este trabajo. Los helmintos de 72 peces fueron contados y removidos para su determinación taxonómica. El registro helminiológico para attenuatum incluye cinco especies, tres de las cuales son compartidas por los peces de ambas localidades. Las comunidades de helmintos son consideradas como aislacionistas y depauperadas por los bajos valores obtenidos de riqueza, abundancia y diversidad, siendo el tremátodo P. minimum, 1a especie dominante. Concluímos que las diferencias observadas entre Ias dos localidades son debidas a las distintas condiciones bióticas y abióticas encontradas; en el Lago de Pátzcuaro, tales condiciones favorecen el incremento en las poblaciones de aves ictiófagas que actúan como hospederos definitivos de especies alogénicas tales como P. minimum.</abstract><pub>Southwestern Association of Naturalists</pub><tpages>5</tpages></addata></record>
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source JSTOR Archive Collection A-Z Listing
subjects Animal communities
Aquatic communities
Chirostoma attenuatum
Community structure
Fauna
Freshwater
Freshwater fishes
Lakes
Parasite hosts
Parasites
Species diversity
Zoology
title Helminth Community Structure of Chirostoma attenuatum (Osteichthyes: Atherinidae)in Two Mexican Lakes
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