less or lower energetic food supply to their offspring. At each of these stages, young individuals may experience deficiencies, i.e. Foraging involves a hierarchical process of decision-making, including choosing appropriate habitat/patch searching for or/and recognizing suitable prey and capturing them. The improvement in breeding success is likely to be mediated through improvement in individual foraging ability, which would correspond to an enhanced capacity to provide for the offspring. laying date, nest site selection, foraging. Īge-related changes in breeding performance are known to be the result of experience accumulated over time in several aspects of breeding in birds i.e. This decline, or senescence, involves a loss of physiological functions and is accompanied by decreasing fertility and increased risks of mortality with advancing age. However, for long-lived species, this increase is often followed by stabilization in survival and reproductive performance at middle age, then a decline in old age, e.g. In vertebrates, survival and reproductive performance generally increase with age.
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