Crepuscular foraging by a pursuit-diving seabird: tactics of common murres in response to the diel vertical migration of capelin
Crepuscular foraging by a pursuit-diving seabird: tactics of common murres in response to the diel vertical migration of capelin
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DOI：
10.3354/meps08752
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发表时间：
2010-01-01
影响因子：
2.5
通讯作者：
Montevecchi, W. A.
中科院分区：
文献类型：
--
作者：
Regular, P. M.;Davoren, G. K.;Montevecchi, W. A.
猎物的时空分布直接影响捕食者的觅食行为。为了研究捕食者-猎物在Diel循环中的相互作用，我们研究了一种追逐潜水的海鸟-普通的Murre Uria aalge-潜水活动的连续记录，并结合加拿大纽芬兰东北部海岸附近的主要猎物Capelin Mallotus villosus的垂直分布的精细数据。海豚潜水活动的日变化模式密切地反映了海豚的垂直分布和运动的变化。在白天，43%的海豚潜水是深的(>；=50米)，将海参带入冷中间层(CIL；类似于40-240米)的0摄氏度以下的水中，当时82%的海豚生物量位于CIL内或以下。晚上，穆尔斯在较浅的深度集中潜水活动(94%的潜水是
The spatial and temporal distribution of prey directly influences the foraging and feeding behaviour of predators. To investigate predator-prey interactions through the diel cycle, we examined continuous records of diving activity by a pursuit-diving seabird, the common murre Uria aalge, in conjunction with fine-scale data on the vertical distribution of their main prey, capelin Mallotus villosus, off the northeast Newfoundland coast, Canada. Diurnal patterns in the diving activities of murres closely reflected changes in the vertical distribution and movements of capelin. During daylight hours, 43% of murre dives were deep (>= 50 m), bringing murres into sub-0 degrees C water in the Cold Intermediate Layer (CIL; similar to 40 to 240 m), when 82% of capelin biomass was located within or below the CIL. At night, murres concentrated diving activity at shallower depths (94% of dives were