Long‐lived and heavier females give birth earlier in roe deer F Plard, JM Gaillard, T Coulson, AJ Hewison… - Ecography, 2013

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Long‐lived and heavier females give birth earlier in roe deer  F Plard, JM Gaillard, T Coulson, AJ Hewison… - Ecography, 2013
...  Our study demonstrates that high quality (heavy and long-lived) females give birth earlier than low quality females. Temporally variable attributes linked to female condition, such as reproductive success in the previous year and relative annual body mass, had no detectable influence on parturition date. We conclude that parturition date, a crucial determinant of reproductive success, is shaped by attributes linked to female quality rather than by time-dependent attributes linked to female condition in income breeders (individuals that rely on current resource intake rather than on accumulated body reserves to offset the increased energy requirements due to reproduction) such as roe deer.