Short- and long-term effects of nutritional state on IGF-1 levels in nestlings of a wild passerine.

ABSTRACT: 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 t

SUBMITTER: Lodjak J 

PROVIDER: S-EPMC10615909 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature