Colony-specific foraging behaviour and co-ordinated divergence of chick development in the wedge-tailed shearwater Puffinus pacificus
Colony-specific foraging behaviour and co-ordinated divergence of chick development in the wedge-tailed shearwater Puffinus pacificus
复制标题
楔尾海鸥群体特异性觅食行为和雏鸟发育的协调分化
DOI：
10.3354/meps299289
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发表时间：
2005
影响因子：
2.5
通讯作者：
B. Congdon
中科院分区：
文献类型：
--
作者：
D. R. Peck;B. Congdon
我们研究了在温带(豪爵岛)和亚热带(苍鹭岛)繁殖的太平洋楔尾海豚在觅食、供应和雏鸟发育模式方面的差异。我们的目标是评估不同觅食环境在这些特征上造成协调适应分歧的可能性。不同地点的成虫觅食和供应行为差异很大，反映出苍鹭岛较低的近群体资源可获得性。不同地区的雏鸟发育模式也有很大差异。总体而言，豪勋爵岛的雏鸟生长更快，每克食物的骨骼生长更快。相比之下，苍鹭岛的雏鸟每运送一克食物就表现出更大的体重增加。根据先前观察到的海鸟对补给率变化的生理或兼性反应以及每个地点初级生产力的长期模式，我们认为这些发育差异反映了群体对长期补给率差异的特定生理适应。如果是这样的话，我们的结果表明，在这两个地点之间，环境决定的雏鸟和成虫生活史参数的协同分化共同进化。
We examined divergence in foraging, provisioning and chick developmental patterns between wedge-tailed shearwaters Puffinus pacificus breeding at a temperate (Lord Howe Island) and sub-tropical (Heron Island) location. We aimed to evaluate the potential for different foraging environments to cause co-ordinated adaptive divergence in these characteristics. Adult foraging and provisioning behaviour differed significantly between locations, reflecting lower near-colony resource availability at Heron Island. Chick developmental patterns also differed significantly between locations. Overall, chicks at Lord Howe Island grew faster and had greater skeletal growth per gram of food delivered. In contrast, chicks at Heron Island exhibited greater body mass gains per gram of food delivered. Based on previously observed physiological or facultative responses to changes in provisioning rates in seabirds and long-term patterns of primary productivity at each location, we propose these developmental differences reflect colony-specific physiological adaptations to differences in long-term provisioning rates. If so, our results suggest co-ordinated environmentally determined divergent coevolution of chick and adult life-history parameters between these 2 locations.