HELPING-BEHAVIOR IN COOPERATIVELY-BREEDING GREEN WOODHOOPOES - SELECTED OR UNSELECTED TRAIT
HELPING-BEHAVIOR IN COOPERATIVELY-BREEDING GREEN WOODHOOPOES - SELECTED OR UNSELECTED TRAIT
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DOI：
10.1163/156853993x00425
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发表时间：
1993-11-01
期刊：
影响因子：
1.3
通讯作者：
DUPLESSIS, MA
中科院分区：
文献类型：
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作者：
DUPLESSIS, MA
1.实验研究了合作单养绿色紫腹凤头鹦鹉刺激-反应机制的组成及其对雏鸟摄食率的影响，结果表明听觉和视觉刺激都起着重要作用.繁殖状况不影响成虫对各种刺激的反应方式.成年林戴胜鸟对外来雏鸟的喂食频率和食物量与自己的雏鸟一样。来自两项不同研究的观察证据表明，新移民的非繁殖者为年轻人提供了与其他建立的非繁殖者一样多的食物。因此，没有证据表明，非亲喂养行为与巢址特异性，亲属歧视，或在这个物种中与育种者的先前联系有关。在8年（1981-1989年）的时间里，共收集了258个“小组年”的人口统计数据表明，帮手没有获得任何直接或间接的健身效益，因为他们的非父母喂养的贡献年轻人本身。
1. I experimentally examined components of the stimulus-response mechanism and their effects on feeding rates to nestlings in cooperative singular-breeding green woodhoopoes Phoeniculus purpureus, and showed that both auditory and visual stimuli played important roles.2. Breeding status did not influence the way in which adults responded to the various stimuli.3. Adult woodhoopoes fed foreign nestlings which had been transferred as frequently and with as much food as their own nestlings.4. Observational evidence from two different studies showed that recent-immigrant nonbreeders provided young with as much food as other established nonbreeders. Thus, there is no evidence that nonparental feeding behaviour is related to nest-site specificity, kin discrimination, or prior association with breeders in this species.5. Demographic data gathered over a period of eight years (1981-1989) for a total of 258 ''group years'' suggested that helpers did not gain any direct or indirect fitness benefits as a result of their nonparental feeding contributions to young per se.