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(a) Pregnancy rate as a function of body mass and the quality of early environment (high ROSutero: triangles and solid line, low ROSutero: circles and dashed line) in young female (2–6 years of age) Svalbard reindeer. Lines show the predicted values and points indicate the raw data (n = 1050). (b) Age-specific mass ±s.e. at 50% pregnancy probability for female reindeer that experienced high (open triangles) or low (filled circles) ROSutero.
