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001-es BibID:	BIBFORM084644
Első szerző:	Bókony Veronika (alkalmazott zoológus)
Cím:	Necessity or capacity? Physiological state predicts problem-solving performance in house sparrows / Bókony Veronika, Lendvai Ádám Zoltán, Vágási István Csongor, Laura Patras, Pap Péter László, Németh József, Vincze Ernő, Papp Sándor, Preiszner Bálint, Seress Gábor, Liker András
Dátum:	2014
ISSN:	1045-2249
Megjegyzések:	Innovative behaviors such as exploiting novel food sources can grant significant fitness benefits for animals, yet little is known about the mechanisms driving such phenomena, and the role of physiology is virtually unexplored in wild species. Two hypotheses predict opposing effects of physiological state on innovation success. On one hand, poor physiological condition may promote innovations by forcing individuals with poor competitive abilities to invent alternative solutions. On the other hand, superior physiological condition may ensure greater cognitive capacity and thereby better problem-solving and learning performance. To test these hypotheses, we studied the behavior of wild-caught house sparrows (Passer domesticus) in 4 novel tasks of food acquisition, one of which was presented to the birds in repeated trials, and we investigated the relationships of individual performance with relevant physiological traits. We found that problem-solving performance across the 4 tasks was moderately consistent within individuals. Birds with lower integrated levels of corticosterone, the main avian stress hormone, solved the most difficult task faster and were more efficient learners in the repeated task than birds with higher corticosterone levels. Birds with higher concentration of total glutathione, a key antioxidant, solved 2 relatively easy tasks faster, whereas birds with fewer coccidian parasites tended to solve the difficult task more quickly. Our results, thus, indicate that aspects of physiological state influence problem-solving performance in a context-dependent manner, and these effects on problem-solving capacity, probably including cognitive abilities, are more likely to drive individual innovation success than necessity due to poor condition.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk animal innovation coccidiosis learning oxidative status stress physiology
Megjelenés:	Behavioral Ecology. - 25 : 1 (2014), p. 124-135. -
További szerzők:	Lendvai Ádám Zoltán (1977-) (biológus) Vágási Csongor István Pătraş, Laura Pap Péter László (ökológus) Németh József (1954-) (vegyész, analitikus) Vincze Ernő Papp Sándor Preiszner Bálint Seress Gábor Liker András
Pályázati támogatás:	OTKA-K84132 OTKA OTKA-PD76862 OTKA OTKA-K75965 OTKA TÁMOP-4.2.2.A-11/1/KONV-2012-0064 TÁMOP
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001-es BibID:	BIBFORM072322
035-os BibID:	(cikkazonosító)e0192701 (WOS)000424814300039 (Scopus)85042120858
Első szerző:	Vágási Csongor István
Cím:	Experimental increase in baseline corticosterone level reduces oxidative damage and enhances innate immune response / Csongor I. Vágási, Laura Pătraș, Péter L. Pap, Orsolya Vincze, Cosmin Mureșan, József Németh, Ádám Z. Lendvai
Dátum:	2018
ISSN:	1932-6203
Megjegyzések:	Glucocorticoid (GC) hormones are significant regulators of homeostasis. The physiological effects of GCs critically depend on the time of exposure (short vs. long) as well as on their circulating levels (baseline vs. stress-induced). Previous experiments, in which chronic and high elevation of GC levels was induced, indicate that GCs impair both the activity of the immune system and the oxidative balance. Nonetheless, our knowledge on how mildly elevated GC levels, a situation much more common in nature, might influence homeostasis is limited. Therefore, we studied whether an increase in GC level within the baseline range suppresses or enhances condition (body mass, hematocrit and coccidian infestation) and physiological state (humoral innate immune system activity and oxidative balance). We implanted captive house sparrows Passer domesticus with either 60 days release corticosterone (CORT) or control pellets. CORT-treated birds had elevated baseline CORT levels one week after the implantation, but following this CORT returned to its pre-treatment level and the experimental groups had similar CORT levels one and two months following the implantation. The mass of tail feathers grown during the initial phase of treatment was smaller in treated than in control birds. CORT implantation had a transient negative effect on body mass and hematocrit, but both of these traits resumed the pre-treatment values by one month post-treatment. CORT treatment lowered oxidative damage to lipids (malondialdehyde) and enhanced constitutive innate immunity at one week and one month post-implantation. Our findings suggest that a relatively short-term (i.e. few days) elevation of baseline CORT might have a positive and stimulatory effect on animal physiology.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk antioxidant glucocorticoid stress condition innate immunity oxidative stress
Megjelenés:	Plos One. - 13 : 2 (2018), p. 1-17. -
További szerzők:	Pătraş, Laura Pap Péter László (ökológus) Vincze Orsolya (1988-) (biológus) Mureşan, Cosmin Németh József (1954-) (vegyész, analitikus) Lendvai Ádám Zoltán (1977-) (biológus)
Pályázati támogatás:	EFOP-3.6.2-16-2017-00009 EFOP OTKA K 113108 OTKA EFOP-3.6.1-16-2016-00022 EFOP PD-76862 OTKA
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
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