Patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips
Patterns of energy acquisition by a central place forager: benefits of alternating short and long foraging trips
复制标题
中心地觅食者的能量获取模式：短途和长途交替觅食的好处
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
A. Kato
中科院分区：
文献类型：
--
作者：
Y. Ropert‐Coudert;R. Wilson;F. Daunt;A. Kato
在一些海鸟中，觅食行程被定义为长或短，前往觅食区域所花费的时间长度显然是决定觅食行程长度的关键特征。使用记录器技术，结合已发表研究的补充数据，我们调查了 18 只自由生活的阿德利企鹅 Pygoscelis adeliae 的旅行和觅食时间，这些企鹅正在寻找雏鸟。最深的觅食潜水分布在觅食行程的中心周围。如果考虑深潜期间深度剖面的累积波动量（表明猎物捕获），这种集中趋势尤其明显。值在 20.9% 之前开始增加，并在 67.2% 的潜水发生后停止。觅食活动集中在觅食行程的中间，这表明鸟类往返于猎物区域，而猎物区域的位置在鸟类的行程中几乎没有变化。这些数据构成了一个简单模型的基础，该模型使用旅行和觅食时间以及预计的猎物摄入率以及雏鸟和成体胃排空率来确定有时为了优化成鸟和雏鸟在海上的猎物摄入率，鸟类应该进行双峰长度的觅食行程。版权所有2004。
In some seabirds, foraging trips have been defined as either long or short, with the length of time spent traveling to the foraging area apparently a critical feature in determining foraging trip length. Using logger technology, together with complimentary data from published studies, we investigated traveling and foraging times in 18 free-living Adelie Penguins Pygoscelis adeliae, which were foraging for chicks. Most deep, foraging dives were distributed around the center of the foraging trip. This central tendency was particularly apparent if the cumulative amount of undulations in the depth profile (indicative of prey capture) was considered during deep dives; values started to increase before 20.9% and ceased after 67.2% of the dives had occurred. This concentration of the feeding activity in the middle of the foraging trip indicates that birds traveled to and from a prey patch whose location varied little over the birds' trips. These data form the basis for a simple model that uses traveling and foraging times together with projected rates of prey ingestion and chick and adult gastric emptying to determine that there are occasions when, to optimize rates of prey ingestion while at sea for both adults and chicks, birds should conduct foraging trips of bimodal lengths. Copyright 2004.
通过记录鸬鹚的食道和胃温度来揭示猎物的摄入情况。
DOI：
10.1242/jeb.200.1.149
发表时间：
1997
期刊：
The Journal of experimental biology
影响因子：
--
作者：
Ancel,A;Horning,M;Kooyman,GL
通讯作者：
Kooyman,GL