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Deutsch, J.; Lee, P. |
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Title |
Dominance and feeding competition in captive rhesus monkeys |
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Journal Article |
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Year |
1991 |
Publication |
International Journal of Primatology |
Abbreviated Journal |
Int. J. Primatol. |
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12 |
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6 |
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615-628 |
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Keywords |
female dominance – feeding competition – nutrition – stress |
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Abstract |
The feeding behavior of 16 adult female rhesus monkeys living in three captive social groups was observed. Estimates of relative food intake, feeding rate, and location of feeding in relation to food sources were compared between females of different dominance ranks. Higher-ranking females had greater access to feeding sites and were supplanted or threatened less frequently while feeding than subordinates. However, no consistent differences in estimates of total intake were found between females of high and females of low rank. The effects of dominance on feeding behavior were most pronounced in the group receiving the least food relative to estimates of overall group nutritional requirements. Higher-ranking females, both over the long term and during the study period, tended to produce more surviving offspring. The effects of dominance on reproductive performance appeared to be less related to food intake than to competitive and aggressive interactions, potentially resulting in higher levels of stress for subordinates. |
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813 |
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Author |
Klingel, H. |
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Title |
Tausend Zebras im Computer |
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Year |
1991 |
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Das Tier |
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Das Tier |
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10 |
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8-16 |
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from Professor Hans Klingels Equine Reference List |
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yes |
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1322 |
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Author |
Denoix, J.M. |
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Title |
Approche mecanique des allures et du saut chez le cheval |
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Year |
1991 |
Publication |
Science & Sports |
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6 |
Issue |
2 |
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117-124 |
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Keywords |
cheval; locomotion; biomecanique; horse; locomotion; biomechanics |
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Resume La locomotion du cheval implique des contraintes mecaniques elevees sur les os, les articulations, les muscles et les tendons. Son etude permet de mieux connaitre les interventions actives ou passives de ces organes au cours des allures et du saut. Ces elements sont utiles pour la mise en oeuvre rationnelle d'exercices d'entrainement chez le cheval de sport ou de courses, en fonction des exigences de la discipline et des eventuels problemes locomoteurs du sujet. L'etude mecanique de la locomotion du cheval est par ailleurs indispensable pour l'amelioration de la connaissance des boiteries. Elle permet de preciser la genese des lesions osteoarticulaires et musculo-tendineuses et contribue a ameliorer leur traitement.Summary Locomotion of the horse is correlated with a great variety of mechanical stresses on bones, joints, muscles and tendons. Research on locomotion increases the knowledge of passive and active interventions of these structures during gaits and jump. These data are useful to manage the training of sport and jump horses, especially to fit with the particularities of the sport speciality and individual locomotor problems of horses. Beside, studies of locomotion in the horse are of importance to improve the knowledge of lamenesses. They contribute to precise the pathogenesis of osteoarticular and musculotendinous injuries and improve their treatment. |
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3976 |
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Author |
Dugatkin, L.; Alfieri, M. |
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Title |
Tit-For-Tat in guppies (Poecilia reticulata): the relative nature of cooperation and defection during predator inspection |
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Year |
1991 |
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Evolutionary Ecology |
Abbreviated Journal |
Evol. Ecol. |
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5 |
Issue |
3 |
Pages |
300-309 |
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Game theory – Tit-For-Tat – predator inspection – guppy |
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Summary The introduction of game-theoretical thinking into evolutionary biology has laid the groundwork for a heuristic view of animal behaviour in which individuals employ “strategies” – rules that instruct them how to behave in a given circumstance to maximize relative fitness. Axelrod and Hamilton (1981) found that a strategy called Tit-For-Tat (TFT) is one robust cooperative solution to the iterated Prisoner's Dilemma game. There exists, however, little empirical evidence that animals employ TFT. Predator inspection in fish provides one ecological context in which to examine the use of the TFT strategy. |
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Equine Behaviour @ team @ |
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2177 |
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Author |
Mills, G. |
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Title |
Kalahari Hyenas |
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Miscellaneous |
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1991 |
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Equine Behaviour @ team @ |
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4884 |
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Author |
Lee, P. |
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Title |
Adaptation to environmental change:an evolutionary perspective |
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Year |
1991 |
Publication |
Primate responses to environmental changes |
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39-56 |
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Chapmann & Hall |
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London |
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H. O. Box |
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Equine Behaviour @ team @ |
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6523 |
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