INCUBATION ROUTINE, BODY-MASS REGULATION AND EGG NEGLECT IN THE BLUE PETREL HALOBAENA-CAERULEA
INCUBATION ROUTINE, BODY-MASS REGULATION AND EGG NEGLECT IN THE BLUE PETREL HALOBAENA-CAERULEA
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DOI：
10.1111/j.1474-919x.1994.tb01097.x
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发表时间：
1994-07-01
期刊：
影响因子：
2.1
通讯作者：
WEIMERSKIRCH, H
中科院分区：
文献类型：
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作者：
CHAURAND, T;WEIMERSKIRCH, H
为了探讨影响蓝圆尾海燕（Halobaena caerulea）在凯尔盖朗群岛（Kerguelen Islands）的孵化期和觅食期的因素以及弃巢和回巢的决定因素，对蓝圆尾海燕（Halobaena caerulea）雌雄个体的孵化程序和体重变化进行了研究。而弃巢时的质量稳定。鸟遗弃的巢时，他们的质量下降到阈值，独立的持续时间的快速。在成功和不成功的育种尝试中观察到暂时的卵忽视，但它增加了育种失败的风险。在孵化期的第二部分，在海上获得的净质量和每日质量高于第一部分，这表明食物供应增加。在第一部分，在海上获得的质量和花费的觅食时间呈负相关的质量的鸟之前，它离开了洞穴，而类似的关系并没有发生afterwards.The结果表明，发生一个固定的质量阈值时，鸟类决定离开巢，如果不解除他们的合作伙伴。当一只鸟离开它的巢时，它的质量会影响觅食所花的时间或食物稀缺时获得的质量。虽然离开巢穴或从海上返回的决策规则与身体状况有关，但暂时忽略蛋的可能性使蓝海燕能够调节繁殖失败风险和成年死亡率增加风险之间的权衡。提出了一种基于可变设定点的停止孵化或停止喂食的行为决策模型。
The incubation routine and mass changes of male and female Blue Petrel Halobaena caerulea were studied at the Kerguelen Islands to investigate factors influencing the durations of incubation stints and foraging trips at sea and the factors determining nest desertion and return to the nest.The body mass at the start of an incubation shift and also when the bird was relieved varied throughout the incubation period, whereas the mass when birds deserted the nest was stable. Birds deserted the nest when their mass decreased to threshold, independent of the duration of the fast. Temporary egg neglect was observed in successful as well as in unsuccessful breeding attempts, but it increased the risk of breeding failure. The net and daily mass gained at sea during the second part of the incubation period were higher than during the first part, suggesting an increase in food availability. During the first part, the mass gained at sea and time spent foraging were inversely related to the mass of the bird before it left the burrow, whereas a similar relationship did not occur thereafter.The results suggest the occurrence of a fixed mass threshold when birds decide to leave the nest if not relieved by their partner. The mass when a bird left its nest influenced the time spent foraging or mass gained when food was scarce. Although decision rules to leave the nest or return from the sea are related to body condition, the possibility of neglecting the eggs temporarily enables Blue Petrels to regulate the trade-off between risks of breeding failure and risks of an increase in adult mortality. A model for behavioural decision to stop incubating or stop feeding, based on a variable set point, is proposed.