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001-es BibID:	BIBFORM083229
Első szerző:	Pap Péter László (ökológus)
Cím:	Seasonal Patterns and Relationships among Coccidian Infestations, Measures of Oxidative Physiology, and Immune Function in Free-Living House Sparrows over an Annual Cycle / Péter L. Pap, Laura Pătraş, Gergely Osváth, Deborah M. Buehler, Maaike A. Versteegh, Alina Sesarman, Manuela Banciu, Csongor I. Vágási
Dátum:	2015
ISSN:	1522-2152
Megjegyzések:	Temporal variation in oxidative physiology and its associated immune function may occur as a result of changes in parasite infection over the year. Evidence from field and laboratory studies suggests links between infection risk, oxidative stress, and the ability of animals to mount an immune response; however the importance of parasites in mediating seasonal change in physiological make-up is still debated. Also, we know almost nothing about the temporal consistency of relationships among parasite infestation, markers of oxidative status and immune function in wild animals, and whether variation in oxidative measures can be viewed as a single integrated system. To address these questions, we sampled free-living house sparrows (Passer domesticus) every two months over a complete year and measured infestation with coccidian parasites, as well as 9 traits that reflect condition, oxidative physiology and immune function. We found significant seasonal variation in coccidian infestation and in 7 out of 9 condition and physiological variables over the year. However, we found little support for parasite-mediated change in condition, oxidative physiology and immune functions in house sparrows. In accordance with this, we found no temporal consistency in relationships between the intensity of infestation and physiology. Among measures of oxidative physiology, antioxidants (measured as the total antioxidant capacity and the concentration of uric acids in the plasma) and oxidative damage (measured through the level of malondialdehyde in plasma) positively and consistently covaried over the year, while no such associations were found for the rest of traits (body mass, total glutathione and leukocyte numbers). Our results show that natural levels of chronic coccidian infection have limited effect on the seasonal change of physiological traits, suggesting that the variation of the latter are probably more affected by short term disturbances, such as acute infection and/or season-specific stress stimuli.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk birds heterophil to lymphocyte ratio leukocyte count oxidative status parasites seasonality
Megjelenés:	Physiological and Biochemical Zoology. - 88 : 4 (2015), p. 395-405. -
További szerzők:	Pătraş, Laura Osváth Gergely (1985-) (biológus) Buehler, Deborah M. Versteegh, Maaike A. Sesarman, Alina Banciu, Manuela Vágási Csongor István
Pályázati támogatás:	TÁMOP-4.2.4.A/2-11/1-2012-0001 TÁMOP GTC 34062/2013 Egyéb PN II. RU TE 291/2010 Egyéb
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