Factors accounting for variations in the parasitism by metacercariae (Digenea, Microphallidae) in the amphipod Apohyale hirtipalma (Gammaridea) in the Southeastern Pacific coast

It was assessed the parasitic relationship between by 2 morphospecies of microphallid metacercariae and their second intermediate host, the amphipod Apohyale hirtipalma with the body length and sex of the hosts, and the abundance of shore birds (definitive hosts). Amphipod mortality induced by the p...

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Autores principales:	Hurtado-Ormeño,Claudia, George-Nascimento,Mario
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2016
Materias:	Shorebird abundance host body length host sex parasite identity mortality Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572016000100008
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spelling	oai:scielo:S0718-195720160001000082016-06-24Factors accounting for variations in the parasitism by metacercariae (Digenea, Microphallidae) in the amphipod Apohyale hirtipalma (Gammaridea) in the Southeastern Pacific coastHurtado-Ormeño,ClaudiaGeorge-Nascimento,Mario Shorebird abundance host body length host sex parasite identity mortality Chile It was assessed the parasitic relationship between by 2 morphospecies of microphallid metacercariae and their second intermediate host, the amphipod Apohyale hirtipalma with the body length and sex of the hosts, and the abundance of shore birds (definitive hosts). Amphipod mortality induced by the parasites was assessed through the relationship between the variance/mean parasite abundance ratio with host body length for each metacercariae morphospecies. Four sites at the Biobío Region (36°S), Chile, were selected because of contrasting abundance of potential definitive hosts (Aves: Laridae), from where 240 amphipods were collected from intertidal pools (60 in each sampling locality). Total prevalence was 57.5% and metacercariae found, belonged to 2 unidentified morphospecies of microphallid subfamilies (Microphallinae, 28.3% and Maritrematinae, 36.7%). The prevalence and abundance of metacercariae increased with the amphipod body, although their variations were associated to the abundance of shorebirds. The prevalence of Microphallinae did not have differences among sexes in their relationship with the host body length, while among Maritrematinae, male amphipods showed higher prevalence than females of similar body length. It was also determined that Maritrematinae would cause more mortality than Microphallinae. Local variations of the abundance of other hosts involved in the microphallid life cycles as well as of prevailing local environmental conditions and amphipod behavior may be keys for a better understanding of the abundance and prevalence variations of these parasites.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.51 n.1 20162016-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572016000100008en10.4067/S0718-19572016000100008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Shorebird abundance host body length host sex parasite identity mortality Chile
spellingShingle	Shorebird abundance host body length host sex parasite identity mortality Chile Hurtado-Ormeño,Claudia George-Nascimento,Mario Factors accounting for variations in the parasitism by metacercariae (Digenea, Microphallidae) in the amphipod Apohyale hirtipalma (Gammaridea) in the Southeastern Pacific coast
description	It was assessed the parasitic relationship between by 2 morphospecies of microphallid metacercariae and their second intermediate host, the amphipod Apohyale hirtipalma with the body length and sex of the hosts, and the abundance of shore birds (definitive hosts). Amphipod mortality induced by the parasites was assessed through the relationship between the variance/mean parasite abundance ratio with host body length for each metacercariae morphospecies. Four sites at the Biobío Region (36°S), Chile, were selected because of contrasting abundance of potential definitive hosts (Aves: Laridae), from where 240 amphipods were collected from intertidal pools (60 in each sampling locality). Total prevalence was 57.5% and metacercariae found, belonged to 2 unidentified morphospecies of microphallid subfamilies (Microphallinae, 28.3% and Maritrematinae, 36.7%). The prevalence and abundance of metacercariae increased with the amphipod body, although their variations were associated to the abundance of shorebirds. The prevalence of Microphallinae did not have differences among sexes in their relationship with the host body length, while among Maritrematinae, male amphipods showed higher prevalence than females of similar body length. It was also determined that Maritrematinae would cause more mortality than Microphallinae. Local variations of the abundance of other hosts involved in the microphallid life cycles as well as of prevailing local environmental conditions and amphipod behavior may be keys for a better understanding of the abundance and prevalence variations of these parasites.
author	Hurtado-Ormeño,Claudia George-Nascimento,Mario
author_facet	Hurtado-Ormeño,Claudia George-Nascimento,Mario
author_sort	Hurtado-Ormeño,Claudia
title	Factors accounting for variations in the parasitism by metacercariae (Digenea, Microphallidae) in the amphipod Apohyale hirtipalma (Gammaridea) in the Southeastern Pacific coast
title_short	Factors accounting for variations in the parasitism by metacercariae (Digenea, Microphallidae) in the amphipod Apohyale hirtipalma (Gammaridea) in the Southeastern Pacific coast
title_full	Factors accounting for variations in the parasitism by metacercariae (Digenea, Microphallidae) in the amphipod Apohyale hirtipalma (Gammaridea) in the Southeastern Pacific coast
title_fullStr	Factors accounting for variations in the parasitism by metacercariae (Digenea, Microphallidae) in the amphipod Apohyale hirtipalma (Gammaridea) in the Southeastern Pacific coast
title_full_unstemmed	Factors accounting for variations in the parasitism by metacercariae (Digenea, Microphallidae) in the amphipod Apohyale hirtipalma (Gammaridea) in the Southeastern Pacific coast
title_sort	factors accounting for variations in the parasitism by metacercariae (digenea, microphallidae) in the amphipod apohyale hirtipalma (gammaridea) in the southeastern pacific coast
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572016000100008
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_version_	1714202354723586048

Factors accounting for variations in the parasitism by metacercariae (Digenea, Microphallidae) in the amphipod Apohyale hirtipalma (Gammaridea) in the Southeastern Pacific coast

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