منابع مشابه
Blue jays, Cyanocitta cristata, devalue social information in uncertain environments
http://dx.doi.org/10.1016/j.anbehav.2015.11.015 0003-3472/© 2015 The Association for the Study of A Animals are selective about when to learn by observing others. Models predict that social information becomes less reliable in uncertain environments, and therefore animals should reduce their use of social information in these environments; however, these parameters are often difficult to manipu...
متن کاملVisual Detection of Cryptic Prey by Blue Jays (Cyanocitta cristata).
Blue jays learned to respond differentially to the presence or absence of Catocala moths in slides. This detection of the moths by the jays was affected by the background upon which the moth was placed and its body orientation, thus providing an objective measure of crypticity. These procedures are useful for the study of visual detection of prey.
متن کاملThe cost of limited attention in blue jays
Experiments with fish and birds suggest that animals are unable to simultaneously allocate sufficient attention to tasks such as the detection of an approaching predator while searching for cryptic prey. We quantified the effects of limited attention on performance in controlled laboratory settings and report here the first direct evidence that attending to a difficult central task simulating f...
متن کاملHabitat and Nesting Success of Blue Jays (cyanocitta Cristata): Importance of Scale
—Nesting success of birds often is influenced by habitat features surrounding nests. However, few studies have investigated habitat influences at multiple levels and spatial scales. We examined the relationship between Blue Jay (Cyanocitta cristata) nesting success and habitat at three levels (macrohabitat, microhabitat, and nest site) and at three different scales within the microhabitat level...
متن کاملDiet Choices of Blue Jays (Cyanocitta cristata) as a Function of Time Spent Foraging
Optimal diet theory predicts choices among prey types. With sequential prey encounters, less profitable prey types may be rejected immediately because rejecting the prey item at hand increases the probability of encountering more profitable types. However, Lucas (1985) argued that at the end of a foraging bout, all encountered prey types should be accepted because the opportunity to encounter m...
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ژورنال
عنوان ژورنال: Behaviour
سال: 1983
ISSN: 0005-7959,1568-539X
DOI: 10.1163/156853983x00444