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Author |
Petherick, J.C.; Rutter, S.M. |
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Title |
Quantifying motivation using a computer-controlled push-door |
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Journal Article |
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Year |
1990 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
27 |
Issue |
1 |
Pages |
159-167 |
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Abstract |
A computer-controlled push-door system was designed and tested as a method for measuring motivation. Eleven domestic hens were trained to use the push-door to gain access to food. They were deprived of food for 12 h or 43 h on 12 occasions and the push-door was used to measure the amount of “work” (measured as force × time) that they performed to gain access to a food reward. When deprived of food for 12 h the hens took significantly longer (P<0.01) to reach the required threshold of work, than when deprived for 43 h. This difference arose from the amount of time that the hens spent not pushing at the door. The problems encountered with this system and such an approach to measuring motivation are discussed. |
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0168-1591 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
6165 |
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Author |
Tomasello, M. |
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Title |
Cultural transmission in the tool use and communicatory signalling of chimpanzees? |
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Book Chapter |
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Year |
1990 |
Publication |
Language and Intelligence in Monkeys and Apes. |
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274-311 |
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Cambridge University Press |
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Cambridge |
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Parker,S.T.;Gibson,K.R. |
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no |
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Equine Behaviour @ team @ |
Serial |
5267 |
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Author |
Byrne, R.W.; Whiten, A. |
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Title |
Tactical deception in primates: the 1990 database |
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Book Whole |
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Year |
1990 |
Publication |
Primate Reports |
Abbreviated Journal |
Primate Rep. |
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Volume |
27 |
Issue |
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Pages |
1-101 |
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German Primate Center |
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no |
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Equine Behaviour @ team @ |
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6172 |
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Author |
Edgar, G.K.; Smith, A.T. |
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Title |
Hemifield differences in perceived spatial frequency |
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Journal Article |
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Year |
1990 |
Publication |
Perception |
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Volume |
19 |
Issue |
6 |
Pages |
759-766 |
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Measurements of the perceived spatial frequency of stationary sinewave gratings were made with the gratings presented at the same eccentricity in the left, right, upper, and lower visual hemifields. Ten subjects performed the task binocularly with spatial frequencies of 1, 2, and 4 cycles deg-1. Two of these subjects also performed the task monocularly at 2 cycles deg-1. In the majority of cases, the spatial frequency of stimuli presented in the left and lower visual hemifields was overestimated relative to stimuli presented in the right and upper visual hemifields. The results were similar for all spatial frequencies tested, and the direction of the asymmetry was the same whether viewing was with the left eye, right eye or binocular, suggesting that the differences in perceived spatial frequency are not retinal in origin. |
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Pion Ltd |
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no |
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Equine Behaviour @ team @ |
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5374 |
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Author |
Cheney D.L.; Seyfarth, R.M. |
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Title |
How monkeys see the world: Inside the mind of another species |
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Year |
1990 |
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University of Chicago Press |
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Chicago |
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no |
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Call Number |
refbase @ user @ |
Serial |
706 |
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Author |
Byrne, R.W.; Whiten, A.; Henzi, S.P. |
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Title |
Social relationships of mountain baboons: Leadership and affiliation in a non-female-bonded monkey |
Type |
Journal Article |
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Year |
1990 |
Publication |
American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
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Volume |
20 |
Issue |
4 |
Pages |
313-329 |
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Keywords |
relationships; one-male groups; female-bonding; spacing; support; Papio ursinus; Papio hamadryas |
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Abstract 10.1002/ajp.1350200409.abs Instead of close and differentiated relationships among adult females, the accepted norm for savanna baboons, groups of Drakensberg mountain baboons (Papio ursinus) showed strong affiliation of females towards a single male. The same male was usually the decision-making animal in controlling group movements. Lactating or pregnant females focused their grooming on this “leader” male, producing a radially patterned sociogram, as in the desert baboon (P. hamadryas); the leader male supported young animals in the group against aggression and protected them against external threats. Unlike typical savanna baboons, these mountain baboons rarely displayed approach-retreat or triadic interactions, and entirely lacked coalitions among adult females. Both groups studied were reproductively one-male; male-female relationships in one were like those in a unit of a hamadryas male at his peak, while the other group resembled the unit of an old hamadryas male, who still leads the group, with a male follower starting to build up a new unit and already monopolizing mating. In their mountain environment, where the low population density suggests conditions as harsh for baboons as in deserts, adults in these groups kept unusually large distances apart during ranging; kin tended to range apart, and spacing of adults was greatest at the end of the dry, winter season. These facts support the hypothesis that sparse food is responsible for convergence with hamadryas social organization. It is suggested that all baboons, though matrilocal, are better categorized as “cross-sex-bonded” than “female bonded”. |
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Wiley Subscription Services, Inc., A Wiley Company |
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ISSN |
1098-2345 |
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Equine Behaviour @ team @ |
Serial |
5309 |
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Author |
Klingel, H. |
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Title |
Kalameili – future home of the Przewalski horse? |
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Book Chapter |
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Year |
1990 |
Publication |
Proceedings of the 5th International Symposium on the Preservation of the Przewalski Horse, Leipzig |
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Issue |
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Pages |
221-224 |
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Publisher |
Zoolog Garten |
Place of Publication |
Leipzig |
Editor |
Seifert, S. |
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Notes |
from Professor Hans Klingels Equine Reference List |
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yes |
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Call Number |
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1323 |
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