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Variation in Parental Care of Common Goldeneye (Bucephala Clangula) Females

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Factors affecting the variation of parental care were examined in the precocial, nidifugous common goldeneye (Bucephala clangula), a species with uniparental female care. Parental care, measured as the time spent by the female in rearing the brood, varied considerably. Habitat shelterness and food abundance in brood rearing lakes did not affect the duration of parental care. Brood mortality and size affected females' decision to abandon the brood; broods left younger experienced higher mortality during the parental care and were smaller than broods reared for longer. Offspring left by a female did not have higher mortality than same-aged offspring not left. Broods that were deserted early did also produce young to the fledging age.

Affiliations: 1: Finnish Game and Fisheries Research Institute, Evo Game Research Station, SF-16970 Evo, Finland


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