Temporal changes in food resources,parental feeding and breeding success of Heron Island silvereyes,Zosterops lateralis chlorocephala |
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Authors: | Kazuhiro Eguchi |
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Institution: | (1) Department of Biology, Faculty of Science, Kyushu University, 812 Fukuoka, Japan |
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Abstract: | The influences of the temporal change in food supply on the parental feeding effort and breeding success of silvereyes,Zosterops lateralis chlorocephala, was investigated on Heron Island, Australia. Food supply (arthropods and figs) declined as the breeding season progressed.
The parental feeding rate and growth of nestlings were lower when food supply was poor. When available, dominant pairs fed
their young more figs and fewer arthropods than lower ranking pairs. Dominant pairs raised heavier young than lower ranking
pairs when food supply was poor, while there were no significant differences between them when food supply was rich. When
food supply was rich, pairs delivering greater amounts of arthropods reared nestlings better, whereas feeding more figs did
not improve growth of nestlings. When food supply was poor, pairs spending a longer time at the nest reared nestlings better. |
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Keywords: | breeding success dominance relationship food supply parental feeding seasonal decline Zosterops lateralis |
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