Post-nestling behaviour in goshawks, Accipiter gentilis: II. Sex differences in sociality and nest-switching
Post-nestling behaviour in goshawks, Accipiter gentilis: II. Sex differences in sociality and nest-switching
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苍鹰的筑巢后行为，Accipiter gentilis：II。
DOI：
10.1006/anbe.1993.1199
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发表时间：
1993
期刊：
影响因子：
2.5
通讯作者：
M. Karlbom
中科院分区：
文献类型：
--
作者：
R. Kenward;V. Marcström;M. Karlbom
摘要Abstract. 1980-1984年，对187只雏鹰的130个雏鸟进行了无线电标记，研究了雏鹰的雌雄关系。小雄性苍鹰的比例是最少的在雏鸟已经失去了最年轻的，可能是因为同胞的女性。男性分散在较早的年龄比女性，特别是从大型育雏和地区有很少的兔子;女性分散早，只有从育雏孵化晚。分散后移动的距离与兔子的丰度有关，雄性杀死的兔子更少，比雌性移动得更远。在羽翼未丰的时期，兄弟姐妹的间距是显着聚集在随机化测试。雄性幼鸟与其他雄性呆在一起的时间少于雌性幼鸟与其他雌性呆在一起的时间，但雄性幼鸟并不比其他雄性幼鸟更回避雌性幼鸟，雌性幼鸟的兄弟姐妹也不会加速雄性幼鸟的扩散。因此，这表明，男性早从贫困的食物区分散，因为他们比女性发展得更好，因此能够更好地照顾自己时，食物紧张，而不是由于被赶走的姐妹;他们的缺席也将留下更多的食物给他们的亲属。11个早期分配器（10男，一女），然后记录了1-10天的苍鹰巢2·5-23公里，从自己的。他们主要转移到兔子丰富地区的巢穴，要么是因为只有这些巢穴作为食物来源是有利可图的，要么是因为入侵者只有在有足够食物的地方才能被容忍，以免影响居民的生存。
Abstract Abstract. Relationships between juvenile male and female goshawks, Accipiter gentilis , were studied in 130 fledged broods, in which 187 young hawks were radio-tagged during 1980-1984. The proportion of the smaller male goshawks was least at fledging in broods that had lost most young, possibly because of siblicide by females. Males dispersed at an earlier age than females, especially from large broods and in areas where there were few rabbits; females dispersed early only from broods that hatched late. Distances moved after dispersal were related to rabbit abundance, with males killing fewer rabbits and moving further than females. During the post-fledging period, the spacing of siblings was significantly aggregative in randomization tests. Male fledglings stayed together with other males less than females stayed with other females, but males did not avoid females more than other males, nor did having female siblings accelerate male dispersal. It is therefore suggested that the males dispersed early from poor food areas because they were better developed than females and therefore better able to fend for themselves when food-stressed, and not as a result of being driven away by sisters; their absence would also leave more food for their kin. Eleven early dispensers (10 male, one female) were then recorded for 1-10 days at goshawk nests 2·5-23 km from their own. They switched mainly to nests in the rabbit-rich area, either because only these nests were profitable as a source of food, or because intruders were tolerated only where there was enough food for them not to prejudice the survival of residents.