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001-es BibID:	BIBFORM103262
035-os BibID:	(cikkazonosító)39 (WOS)000521053300003 (Scopus)85081599279
Első szerző:	Mahr, Katharina
Cím:	Insulin-like growth factor 1 is related to the expression of plumage traits in a passerine species / Katharina Mahr, Orsolya Vincze, Zsófia Tóth, Herbert Hoi, Ádám Z. Lendvai
Dátum:	2020
ISSN:	0340-5443
Megjegyzések:	Avian plumage colors and ornaments are excellent models to study the endocrine mechanisms linking sexually selected traits and individual parameters of quality and condition. Insulin-like growth factor 1 (IGF-1) is an evolutionarily highly conserved peptide hormone. Its regulatory role in cell proliferation and differentiation and its high sensitivity to the nutritional state of individuals suggest it as an interesting candidate, possibly providing a link between body condition and individual capacity to grow elaborated ornamental features. We investigated whether IGF-1 levels during molting correlate with the expression of multiple ornaments in a sexually dichromatic passerine species, the bearded reedling (Panurus biarmicus). We collected blood samples of males and females shortly before the molting completed and measured the size and colors of ornamental traits. Our results indicate that in males, structural plumage colors, the size of the melanin-based ornament (beard), and tail length are independent traits. IGF-1 levels are associated with the length of the tail and the expression of male structural plumage components (UV coloration), but not the melanin-based ornament. In females, plumage color and tail length were independent traits, which were not related to IGF-1 levels. To the best of our knowledge, this study provides the first evidence that IGF-1 could play a role in the development of secondary sexual characters in a bird species.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Plumage coloration Sexual selection Physiology IGF-1 Condition
Megjelenés:	Behavioral Ecology and Sociobiology. - 74 : 3 (2020), p. 1-12. -
További szerzők:	Vincze Orsolya (1988-) (biológus) Tóth Zsófia (1991-) (biológus) Hoi, Herbert Lendvai Ádám Zoltán (1977-) (biológus)
Pályázati támogatás:	K 113108 OTKA EFOP-3.6.1-16-2016-00022 EFOP TET 15-1-2016-0044 Egyéb MÁEÖ2016_15/76740 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM078431
035-os BibID:	(cikkazonosító)18 (WoS)000425418600003 (Scopus)85040102346
Első szerző:	Pap Péter László (ökológus)
Cím:	Oxidative physiology of reproduction in a passerine bird: a field experiment / Pap Péter L., Vincze Orsolya, Fülöp Attila, Székely-Béres Orsolya, Patras Laura, Pénzes Janka, Vágási Csongor I.
Dátum:	2018
ISSN:	0340-5443 1432-0762
Megjegyzések:	Organisms face resource trade-offs to support their parental effort and survival. The life-history oxidative stress hypothesis predicts that an individual's redox state modulates the trade-off between current and residual fitness, but this has seldom been tested experimentally in non-captive organisms. In this study, we manipulated the brood size in breeding pairs of barn swallows (Hirundo rustica) and found that females tending enlarged broods had increased levels of plasma oxidative damage (malondialdehyde concentration). This effect, however, was not accompanied by either a depletion, or defensive upregulation in antioxidants (glutathione, total antioxidant capacity, and uric acid) that may explain the increase in oxidative damage. Brood size manipulation and the level of plasma oxidative damage during brood rearing are not translated into decreased annual return rate, which does not support the oxidative stress hypothesis of life-history trade-offs. On the contrary, we found that female's oxidative damage and total glutathione levels, an important intracellular non-enzymatic antioxidant measured at hatching decreased and correlated positively, respectively with annual return rate, suggesting that oxidative condition at hatching might be a more important contributor to fitness than the oxidative physiology measured during chick rearing. We also show that individual traits and ecological factors, such as the timing of breeding and the abundance of blood-sucking nest mites, correlated with the redox state of males and females during brood care.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Antioxidants Barn swallows Life-history trade-offs Lipid peroxidation Oxidative stress Parasitism
Megjelenés:	Behavioral Ecology And Sociobiology. - 72 : 2 (2018), p. 1-14. -
További szerzők:	Vincze Orsolya (1988-) (biológus) Fülöp Attila (1987-) (biológus) Székely-Béres Orsolya Pătraş, Laura Pénzes Janka Vágási Csongor István
Pályázati támogatás:	ÚNKP-16-3-IV Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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