Effects of supplemental feeding and female age on timing of breeding in the Alpine Accentor Prunella collaris
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Published source details
Nakamura M. (1995) Effects of supplemental feeding and female age on timing of breeding in the Alpine Accentor Prunella collaris. Ibis, 137, 56-63.
Published source details Nakamura M. (1995) Effects of supplemental feeding and female age on timing of breeding in the Alpine Accentor Prunella collaris. Ibis, 137, 56-63.
Actions
This study is summarised as evidence for the following.
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Provide supplementary food for songbirds to increase reproductive success Action Link |
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Provide supplementary food for songbirds to increase reproductive success
A replicated and controlled study in alpine meadows and pine woodlands on Honshu, Japan, in May-September 1986-9 (Nakamura 1995) found that one year-old alpine accentor Prunella collaris females in territories provided with supplementary food began laying clutches significantly earlier than those in control territories (first egg laid on average on 25th-29th June for fed 16 one year-old females vs. 5th-13th July for 17 control one year-olds). There was no such difference in older females (first egg laid on average on 17th-19th June for 18 fed females vs. 21st-23rd June for 19 controls). There were no differences in duration of the copulation period, the number of breeding attempts or the timing of settlement in territories for either one year-old or older females. Supplementary food consisted of 300 g of millet and canary seed provided two to three times a week beginning in May and continuing until September.
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