Population structure of anisakis simplex (nematoda) in harbor porpoises phocoena phocoena off Denmark
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Population structure of anisakis simplex (nematoda) in harbor porpoises phocoena phocoena off Denmark

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Population structure of anisakis simplex (nematoda) in harbor porpoises phocoena phocoena off Denmark

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dc.contributor.author Herreras Belled, Maria Victoria
dc.contributor.author Balbuena, Juan Antonio
dc.contributor.author Aznar Avendaño, Francisco Javier
dc.contributor.author Kaarstad, S. E.
dc.contributor.author Fernández, M.
dc.contributor.author Raga Esteve, Juan Antonio
dc.date.accessioned 2010-08-09T10:34:09Z
dc.date.available 2010-08-09T10:34:09Z
dc.date.issued 2004
dc.identifier.uri http://hdl.handle.net/10550/16774
dc.description.abstract The population structure and habitat selection of Anisakis simplex in 35 harbor porpoises off Denmark are described. The nematodes were collected from the stomach and duodenal ampulla and were categorized as third-stage larvae, fourth-stage larvae, subadults, and adults. The porpoises harbored 8,043 specimens of A. simplex. The proportion of adults and subadults increased with infrapopulation size. The number of development stages across infrapopulations covaried significantly (Kendall's test of concordance). Concordance was higher in hosts with the highest intensities than in those with low and medium intensities. All stages occurred mainly in the forestomach, but this trend was stronger for the adults. Adult and subadult sex ratios did not depart significantly from 1:1. Our data suggested that recruitment and duration of each stage were the main factors accounting for infrapopulation structure. The preference of A. simplex for the forestomach conformed with previous studies, but the narrower distribution of adults relative to other stages might indicate a strategy to enhance mating opportunities. Information on sex ratios of A. simplex is scarce and contradictory. We suggest that the discrepancies might partly reflect differences in categorization criteria and statistical methods. en
dc.language.iso en en
dc.relation http://www.journalofparasitology.org/doi/pdf/10.1645/GE-188R en
dc.source HERRERAS BELLED, Maria Victoria ; Balbuena Diaz-Pines, Juan Antonio ; Aznar Avendaño, Francisco Javier ; Kaarstad, S. E. ; Fernández, M. ; Raga Esteve, Juan Antonio, 2004, Population structure of anisakis simplex (nematoda) in harbor porpoises phocoena phocoena off Denmark, Journal of Parasitology, vol. 90, no. 5, p. 933–938 en
dc.subject Anisakis Simplex ; Phocoena ; Denmark en
dc.title Population structure of anisakis simplex (nematoda) in harbor porpoises phocoena phocoena off Denmark en
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::CIENCIAS DE LA VIDA en
dc.subject.unesco UNESCO::CIENCIAS DE LA VIDA::Biología animal (Zoología) ::Parasitología animal en
dc.description.private Herreras Belled, Maria Victoria, Maria.V.Herreras@uv.es ; Balbuena Diaz-Pines, Juan Antonio, J.A.Balbuena@uv.es ; Aznar Avendaño, Francisco Javier, Francisco.Aznar@uv.es ; Raga Esteve, Juan Antonio, Toni.Raga@uv.es en
dc.identifier.idgrec 004976 en

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