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Life history theory seeks answers to questions about how suites of traits, like growth rate, body mass and survival, have coevolved to maximize the fitness of individuals. In stochastic environments, individual fitness may be closely linked to environmental conditions experienced early in life. When conditions deteriorate, animals have to adapt physiologically to avoid detrimental effects to growth...
Post‐natal growth rate is an important life‐history trait that is strongly associated with survival during the transition to independence and the overwinter period. In laboratory conditions, insulin‐like growth factor 1 (IGF‐1) has been shown to be one of the main hormones regulating growth and development in maturing vertebrates. However, the extent to which plasma IGF‐1 enhances growth in free‐living...
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