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Pickerel, T.M.; Crowell-Davis, S.L.; Caudle, A.B.; Estep, D.Q. |
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Title |
Sexual preference of mares (Equus caballus) for individual stallions |
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Journal Article |
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Year |
1993 |
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Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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38 |
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1 |
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1-13 |
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Horse; Sexual behavior; Sexual preference; Vocalization |
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Abstract |
Eight mares were tested to determine if they remained near one of two stallions longer than would be expected if association was random. Six stallions were paired in 30 combinations and each mare was tested 30 times. The mares (Equus caballus) demonstrated a definite preference for individual stallions throughout the breeding season. This preference was influenced by the estrous state of the mare. During estrus, mares' preferences for stallions were positively correlated with the rate at which a given stallion vocalized. During diestrus, mares spent significantly less time in the proximity of stallions and did not exhibit any preference for individual stallions. |
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Equine Behaviour @ team @ |
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2270 |
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Escos, J.; Alados, C.L.; Boza, J. |
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Title |
Leadership in a domestic goat herd |
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Journal Article |
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Year |
1993 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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38 |
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1 |
Pages |
41-47 |
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Keywords |
Leadership; Goat |
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This study reports on leadership behavior in a domestic goat group (370 animals) moving from night-time areas to grazing areas. Of the adult females which occupied leadership positons, all of them were born in the study area. Also, they were individuals with more relatives alive in the group (according to matrilineal kinship) than the rest, but they did not show special physical characteristics. |
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2032 |
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Dugatkin, L.A.; Godin, J.-G.J. |
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Title |
Female mate copying in the guppy (Poecilia reticulata): age-dependent effects |
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1993 |
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Behavioral Ecology |
Abbreviated Journal |
Behav. Ecol. |
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4 |
Issue |
4 |
Pages |
289-292 |
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mate choice, copying, guppy, Poecilia reticulata |
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Virtually all studies of mate choice to date have assumed that females choose mates independent of one another. Social cues, however, such as the mate choice of conspecifics, may also play an important role in such decisions. Previous work has shown that female guppies of similar age copy each other's choice of mates. Here we examine the effect of relative age on mate choice copying in the guppy, Poecilia reticulata, and examine whether younger individuals are more likely to copy the mate choice of older conspecifics than vice versa. Results indicate that younger females copy the mate choice of older females, but older individuals do not appear to be influenced by the mate choice of younger individuals. |
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Equine Behaviour @ team @ |
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2181 |
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Chalmeau, R.; Gallo, A. |
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Social constraints determine what is learned in the chimpanzee |
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1993 |
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Behavioural Processes |
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Behav. Process. |
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28 |
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3 |
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173-179 |
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Operant conditioning; Social influence; Individual strategy; Chimpanzee |
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A group of six chimpanzees was placed in a social learning situation, without training. The learning task was an operant conditioning situation; that is, a subject had to pull two handles simultaneously to cause a piece of fruit to fall into the cage. Only three individuals acquired the operant behaviour. For the operant individuals, social influences on the expression of the learning task were then examined; the dominant chimpanzee during feeding had an inhibiting effect when close to the operant subjects. Depending on the subject, social factors may influence not only the specific expression of what is learnt, but also the nature of what is learnt. Chimpanzees appear to experience situations differently: they develop an individual problem-solving strategy according to their social relationships even if the experimental procedure is the same for all. |
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refbase @ user @ |
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569 |
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Neveu, P.J. |
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Title |
Brain Lateralization and Immunomodulation |
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1993 |
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International Journal of Neuroscience |
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Int J Neurosci |
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70 |
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1-2 |
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135-143 |
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Psychoneuroimmunology, brain lateralization |
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The two sides of the brain may be differently involved in the modulation of immune responses as demonstrated by lesional and behavioral approaches in rodents. Lesions of right or left neocortex induced opposite effects on various immune parameters including mitogen-induced lymphoproliferation, interleukin-2 production, macrophage activation or natural killer cell activity. This animal model, useful to elucidate whereby the brain and the immune system can communicate, appears to be suitable for studying the immune perturbations observed during stroke in humans. Brain asymmetry in modulation of immune reactivity may also be demonstrated in intact animal using a behavioral paradigm. The direction of a lateralized motor behavior ie paw preference in a food reaching task, correlated with an asymmetrical brain organization, was shown to be associated with lymphocyte reactivity, natural killer cell activity and auto-antibody production. The association between paw preference and immune reactivity in mice varies according to the immune parameters tested and is a sex-dependent phenomenon in which genetic background may be involved. The experimental models for investigating asymmetrical brain modulation of the immune system should be useful for studying several physiological, pathological and genetic aspects of neuroimmunomodulation. |
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Informa Clin Med |
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0020-7454 |
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doi: 10.3109/00207459309000569 |
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Equine Behaviour @ team @ |
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5778 |
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