Food preference of the Black-headed Gull Chroicocephalus ridibundus differs along a rural–urban gradient
Food preference of the Black-headed Gull Chroicocephalus ridibundus differs along a rural–urban gradient
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DOI：
10.1080/00063657.2014.984655
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发表时间：
2015-01
期刊：
影响因子：
0.7
通讯作者：
P. Scott;P. Duncan;J. Green
中科院分区：
文献类型：
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作者：
P. Scott;P. Duncan;J. Green
胶囊黑头鸥沿着农村-城市梯度选择的食物类型最与他们的直接环境，并显示出不同的反应提供的食物，更多的城市鸟类更快地作出反应。目的确定是否黑头鸥喜欢自然与人为食物沿着城乡梯度，从而确定他们是否选择猎物主要根据熟悉。方法在沿着城乡梯度分布的11个地点，让海鸥选择人工和天然食物。在每个地点进行了20次测试，并记录了鸟类选择食物的偏好和时间。结果黑嘴鸥偏好的食物类型最有可能被发现在他们的直接环境。在城市环境中的鸟类对人工提供的食物反应更快。在不同的环境中，黑头鸥通过减少对人工提供的食物做出反应的时间来表现出学习的能力，无论是在会议期间还是会议之间。结论：虽然有不同的偏好，这是不可能的，黑头鸥之间的农村和城市栖息地自由移动，以满足特定的营养需求。相反，我们得出结论，青少年适应他们的觅食行为，他们的越冬栖息地，他们很可能会选择主要是随机的。
Capsule Black-headed Gulls along a rural–urban gradient chose a food type most associated with their immediate environment, and showed differences in their response to provisioned food, with more urban birds quicker to respond. Aims To determine whether Black-headed Gulls prefer natural versus anthropogenic food along a rural–urban gradient and so determine whether they select prey primarily according to familiarity. Methods Gulls were allowed to choose between provided anthropogenic and natural foods in 11 locations along a rural–urban gradient. Twenty tests were carried out in each location and the preference and time taken for the birds to select food recorded. Results Black-headed Gulls preferred food types most likely to be found in their immediate environment. Birds in more urban environments were quicker to respond to artificially provisioned food. Across environments, Black-headed Gulls showed the capacity to learn by decreasing the time taken to respond to artificially provisioned food, both within and between sessions. Conclusion While there were differences in preference, it is unlikely that Black-headed Gulls were moving freely between rural and urban habitats to satisfy specific nutritional demands. Instead we conclude that juveniles adapt their foraging behaviour to their wintering habitat, which they are likely to select largely stochastically.