Do helminths increase the vulnerability of released pheasants to fox predation?

J. Millán, C. Gortázar, P. Tizzani, F. J. Buenestado

Resultado de la investigación: Article

31 Citas (Scopus)

Resumen

The success of ring-necked pheasant (Phasianus colchicus) restocking in Asturias, northern Spain was assessed, and the role of parasites and predators in the mortality of released birds was studied. The experimental release of 56 radio-tagged pheasants showed that 98% of birds died within 12 days. As soon as 72 h after release, 67.5% of males and 55.0% of females were found dead. Foxes (Vulpes vulpes) killed 63% of the birds. The survival of those birds killed by foxes was lower than for birds which died due to other causes, and pheasants depositing eggs of the nematode Eucoleus contortus (Creplin, 1839) survived less than those apparently non-parasitized. No impact of the parasite on the pheasants' condition was found, but foxes preyed upon parasitized birds more than expected by random. The results suggest that: (i) the current pheasant releases in this area are unsuccessful and need to be improved; (ii) this is mainly due to intense predation by red foxes; and (iii) parasites could have some influence on the predation of released birds by foxes. However, the way parasites affect pheasant vulnerability remains unclear.

Idioma originalEnglish
Páginas (desde-hasta)225-229
Número de páginas5
PublicaciónJournal of Helminthology
Volumen76
N.º3
DOI
EstadoPublished - 1 sep 2002

Huella dactilar

pheasants
Helminths
foxes
helminths
Birds
predation
birds
Parasites
Phasianus colchicus
parasites
Vulpes vulpes
radio frequency identification
Radio
Spain
Eggs
Nematoda
predators
Mortality

ASJC Scopus subject areas

  • Parasitology
  • Animal Science and Zoology

Citar esto

Millán, J. ; Gortázar, C. ; Tizzani, P. ; Buenestado, F. J. / Do helminths increase the vulnerability of released pheasants to fox predation?. En: Journal of Helminthology. 2002 ; Vol. 76, N.º 3. pp. 225-229.
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abstract = "The success of ring-necked pheasant (Phasianus colchicus) restocking in Asturias, northern Spain was assessed, and the role of parasites and predators in the mortality of released birds was studied. The experimental release of 56 radio-tagged pheasants showed that 98{\%} of birds died within 12 days. As soon as 72 h after release, 67.5{\%} of males and 55.0{\%} of females were found dead. Foxes (Vulpes vulpes) killed 63{\%} of the birds. The survival of those birds killed by foxes was lower than for birds which died due to other causes, and pheasants depositing eggs of the nematode Eucoleus contortus (Creplin, 1839) survived less than those apparently non-parasitized. No impact of the parasite on the pheasants' condition was found, but foxes preyed upon parasitized birds more than expected by random. The results suggest that: (i) the current pheasant releases in this area are unsuccessful and need to be improved; (ii) this is mainly due to intense predation by red foxes; and (iii) parasites could have some influence on the predation of released birds by foxes. However, the way parasites affect pheasant vulnerability remains unclear.",
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Do helminths increase the vulnerability of released pheasants to fox predation? / Millán, J.; Gortázar, C.; Tizzani, P.; Buenestado, F. J.

En: Journal of Helminthology, Vol. 76, N.º 3, 01.09.2002, p. 225-229.

Resultado de la investigación: Article

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