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- W2022358629 abstract "The selfish herd hypothesis predicts that aggregations form because individuals move towards one another, and that this movement will minimize predation risk as measured by the domain of danger. To test the predictions of the selfish herd hypothesis in the field, we videotaped the movements of sand fiddler crab, Uca pugilator, flocks being attacked by predators. After recording 12 attacks on crabs by shorebird and human attackers, we digitized the video, and determined the positions of crabs before and after being frightened. We estimated the time of panic initiation by the rapid increase in the crabs' velocity. Crab flocks became more cohesive after panic initiation. The frequency distribution of the crabs' domains of danger shifted significantly towards smaller domains after panic initiation. The median domain of danger was significantly lower after panic initiation than beforehand. Two other indices of aggregation also showed statistically significant increases in flock cohesion following panic initiation. We conclude that fiddler crab behaviour is consistent with the selfish herd hypothesis. Therefore, our results support the selfish herd hypothesis as an explanation for gregarious behaviour. Copyright 2002 The Association for the Study of Animal Behaviour. Published by Elsevier Science Ltd. All rights reserved." @default.
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- W2022358629 date "2002-04-01" @default.
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- W2022358629 title "Quantitative analysis of fiddler crab flock movement: evidence for ‘selfish herd’ behaviour" @default.
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- W2022358629 doi "https://doi.org/10.1006/anbe.2001.1935" @default.
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