Effects of apparent size and speed on the response of chickens, Gallus gallus, to computer-generated simulations of aerial predators
Article Abstract:
Male chickens exposed to the silhouette of a hawk on a video monitor gave stronger responses when the hawk appeared to be larger and moving at faster speeds. This was true for alarm calls and also for crouching behaviour and other non-vocal responses. Non-vocal responses were stronger in reaction to apparent size than speed. The recognition strategies displayed by chickens appear to be linked to the environment of their wild ancestors, with limited visibility from brush and forest, and a need to react quickly to potential predators.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1993
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Food-elicited calls in chimpanzees: effects of food quantity and divisibility
Article Abstract:
An experiment exploring the meaning of food-elicited calls as affected by food quantity and divisability in chimpanzees, Pan troglodytes, was conducted. Results indicate that chimpanzees were more likely to call if there is a large amount of food. The calls are characterized by rough grunts, pan-hoots were elicited when there was a large amount of food. There were ten cases of food sharing, 70 percent of which involved passive relinquishment of food.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1993
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The role of articulation in the production of rhesus monkey, Macaca mulatta,vocalizations
Article Abstract:
A study exploring the role of articulation in the production of rhesus monkey vocalizations was conducted. Results indicate that different vocalizations are associated with lip protrusion, lip separation, teeth separation and mandibular position. Quantitative analysis of 'coo' vocalizations reveal articulatory maneuvers are associated with dominant frequency but not fundamental frequency.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1993
User Contributions:
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- Abstracts: The relationship between the hen and chick, Gallus gallus domesticus: the hen's recognition of the chick. Divergent selection on feather pecking behaviour in laying hens (Gallus gallus domesticus)
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