A CASE OF PARASITE-MEDIATED COMPETITION - PHENOTYPIC DIFFERENTIATION AMONG HOOKWORMS UNCINARIA SP (NEMATODA, ANCYLOSTOMATIDAE) IN SYMPATRIC AND ALLOPATRIC POPULATIONS OF SOUTH-AMERICAN SEA LIONS OTARIA-BYRONIA, AND FUR SEALS ARCTOCEPHALUS-AUSTRALIS (CARNIVORA, OTARIIDAE)

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dc.contributor.authorGEORGENASCIMENTO, M
dc.contributor.authorLIMA, M
dc.contributor.authorORTIZ, E
dc.date.accessioned2025-01-23T19:22:13Z
dc.date.available2025-01-23T19:22:13Z
dc.date.issued1992
dc.description.abstractHookworms in otariids are considered to meet the conditions and to fulfill the predictions set forth in the theoretical literature to define a likely case of host coexistence mediation by a shared pathogen. The intensity of infections, the prevalence of skin lesions and the morphometry of hookworms Uncinaria spp. were examined in South American sea lions and fur seals sampled along the Chilean and the Uruguayan coasts in spring and summer 1981 to 1991. In sympatric host populations from Uruguay, there were clear differences in intensity of infections, prevalence of skin lesions, and body size of the hookworms from the two host species. Sea lions from Chile, allopatric to fur seal populations, are less intensively infected and hookworms found in these sea lions have the smallest body size reported in otariids, while those from South American fur seals are the largest. Hookworms found in sea lion pups from populations sympatric to fur seals revealed intermediate values in intensity and in body size, and the sea lion pups had the highest prevalence of skin lesions. Other reports of hookworms in otariids show intermediate morphometry, following a general linear trend of differentiation in size. Consequently, they are considered to belong to the same, widely distributed species Uncinaria lucasi Stiles, 1901.
dc.fuente.origenWOS
dc.identifier.issn0025-3162
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/98992
dc.identifier.wosidWOS:A1992HR30600001
dc.issue.numero4
dc.language.isoen
dc.pagina.final533
dc.pagina.inicio527
dc.revistaMarine biology
dc.rightsacceso restringido
dc.subject.ods14 Life Below Water
dc.subject.odspa14 Vida submarina
dc.titleA CASE OF PARASITE-MEDIATED COMPETITION - PHENOTYPIC DIFFERENTIATION AMONG HOOKWORMS UNCINARIA SP (NEMATODA, ANCYLOSTOMATIDAE) IN SYMPATRIC AND ALLOPATRIC POPULATIONS OF SOUTH-AMERICAN SEA LIONS OTARIA-BYRONIA, AND FUR SEALS ARCTOCEPHALUS-AUSTRALIS (CARNIVORA, OTARIIDAE)
dc.typeartículo
dc.volumen112
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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