期刊
ANIMAL BEHAVIOUR
卷 83, 期 5, 页码 1225-1229出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.anbehav.2012.02.014
关键词
Diomedea exulans; foraging; Levy flight pattern; wandering albatross
资金
- Biotechnology and Biological Sciences Research Council (BBSRC)
Viswanathan et al.'s (1996,Nature,381,413-415) analysis of the flight patterns of the wandering albatross, Diomedea exulans, led to an explosion of interest in biological Levy flights and to an accumulation of evidence that a wide variety of animals have movement patterns that can be approximated by Levy flights. Subsequently, it became apparent that the analysis of Viswanathan et al. ( 1996) was seriously flawed. Attributing Levy flights to wandering albatrosses now appeared to be an error that nevertheless served as the basis for new insights into animal behaviour. Here I revisit the issue in light of recent evidence that fishy-scented odours facilitate prey location in these birds. Using a simple mathematical argument I show that the touchdown locations (positions of the located odour sources) of odour-mediated anemotactic (upwind) flight patterns form a Levy 'dust'. Levy flight patterns are therefore predicted to be an emergent property of olfactory searching in turbulent environments. In accordance with the reanalysis of the empirical data, flight lengths are predicted to be gamma distributed when prey lying in nearby crosswind locations can occasionally be detected by purely visual means. These predictions are supported by the results of numerical simulations. The finding invites a further re-examination of the flight patterns of the wandering albatross and provides new insights into the movement patterns of many animals that can locate odour sources in turbulent environments. (C) 2012 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据