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001-es BibID:	BIBFORM114811
035-os BibID:	(WoS)001060251500001 (Scopus)85170096928
Első szerző:	Lodjak, Jaani
Cím:	Short- and long-term effects of nutritional state on IGF-1 levels in nestlings of a wild passerine / Jaanis Lodjak, Jelle Boonekamp, Ádám Z. Lendvai, Simon Verhulst
Dátum:	2023
ISSN:	0029-8549
Megjegyzések:	Growth trajectories of young animals are intimately connected to their fitness prospects, but we have little knowledge of growth regulation mechanisms, particularly in the wild. Insulin-like growth factor 1 (IGF-1) is a central hormone in regulating resource allocation, with higher IGF-1 levels resulting in more growth. IGF-1 levels generally increase in conjunction with nutritional state, but whether IGF-1 levels are adjusted in response to current nutrient availability or to the nutrient availability integrated over a longer term is not well known. We tested for such effects by supplementary feeding the jackdaw (Corvus monedula) nestlings in experimentally reduced or enlarged broods with either water (control) or a food solution; these manipulations have long- and short-term effects on the nutritional state, respectively. Baseline plasma IGF-1 levels were higher in reduced broods. Food supplementation induced an increase in plasma IGF-1 levels measured one hour later, and this effect was significantly more substantial in nestlings in reduced broods. Changes in plasma IGF-1 levels increased with increased retention of the supplementary food, which was higher in reduced broods, explaining the stronger IGF-1 response. Thus, IGF-1 levels respond to short-term variations in the nutritional state, but this effect is amplified by longer-term variations in the nutritional state. We discuss our findings using a graphical model that integrates the results of the two treatments.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk IGF-1 táplálkozás madár
Megjelenés:	Oecologia. - 203 : 1-2 (2023), p. 27-35. -
További szerzők:	Boonekamp, Jelle Lendvai Ádám Zoltán (1977-) (biológus) Verhulst, Simon
Pályázati támogatás:	K139021 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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