Influence of wing loading on the trade-off between pursuit-diving and flight in common guillemots and razorbills
Influence of wing loading on the trade-off between pursuit-diving and flight in common guillemots and razorbills
复制标题
机翼载荷对海鸠和剃须刀追逐-俯冲与飞行之间权衡的影响
DOI：
10.1242/jeb.037390
复制
发表时间：
2010
影响因子：
2.8
通讯作者：
Keith C. Hamer
中科院分区：
文献类型：
--
作者：
C. Thaxter;S. Wanless;F. Daunt;Mike P. Harris;Silvano Benvenuti;Yutaka Watanuki;David Grémillet;Keith C. Hamer
使用翅膀进行水下推进的鸟类物种被认为面临着飞行和潜水之间的进化权衡，导致预测具有不同翅膀面积相对于身体质量（即不同的翅膀负载）的物种在觅食旅行期间飞行和潜水活动的相对重要性也有所不同。我们测试了这一假设的两个类似大小的物种的Alkalae（常见的海鸠和razorbills）通过使用鸟载设备，以检查三维觅食行为在一个单一的殖民地。海鸠有30%以上的翼负荷比razorbills和，在保持这种差异，razorbills花了两倍的时间在飞行中的旅行时间的比例，而海鸠花了两倍的时间在潜水活动。Razorbills进行了大量的短期，相对较浅的潜水，并在潜水的底部阶段花费很少的时间，而海鸠潜水次数较少，但经常达到深度，这表明它们靠近海床（约100米）。35-70米）。海鸠潜水的底部阶段相对较长，表明它们花了相当长的时间寻找和追捕猎物。海鸠在每次潜水中也有更大比例的时间在水下，并且下降速度更快，这表明它们更善于最大限度地利用时间来追逐和捕获猎物。觅食行为的这些差异可能部分反映了海鸠喂养他们的小鸡单一的大型猎物附近的底部和razorbills喂养他们的小鸡多个猎物从水柱。尽管如此，我们的数据支持的概念，海雀的翼负荷种间差异反映了空中和水下运动之间的进化权衡。
SUMMARY Species of bird that use their wings for underwater propulsion are thought to face evolutionary trade-offs between flight and diving, leading to the prediction that species with different wing areas relative to body mass (i.e. different wing loadings) also differ in the relative importance of flight and diving activity during foraging trips. We tested this hypothesis for two similarly sized species of Alcidae (common guillemots and razorbills) by using bird-borne devices to examine three-dimensional foraging behaviour at a single colony. Guillemots have 30% higher wing loading than razorbills and, in keeping with this difference, razorbills spent twice as long in flight as a proportion of trip duration whereas guillemots spent twice as long in diving activity. Razorbills made a large number of short, relatively shallow dives and spent little time in the bottom phase of the dive whereas guillemots made fewer dives but frequently attained depths suggesting that they were near the seabed (ca. 35–70 m). The bottom phase of dives by guillemots was relatively long, indicating that they spent considerable time searching for and pursuing prey. Guillemots also spent a greater proportion of each dive bout underwater and had faster rates of descent, indicating that they were more adept at maximising time for pursuit and capture of prey. These differences in foraging behaviour may partly reflect guillemots feeding their chicks single large prey obtained near the bottom and razorbills feeding their chicks multiple prey from the water column. Nonetheless, our data support the notion that interspecific differences in wing loadings of auks reflect an evolutionary trade-off between aerial and underwater locomotion.
布伦尼希海鸠潜水游泳速度的机械与生理决定因素。
DOI：
10.1242/jeb.202.13.1741
发表时间：
1999
期刊：
The Journal of experimental biology
影响因子：
--
作者：
Lovvorn,JR;Croll,DA;Liggins,GA
通讯作者：
Liggins,GA