| Records |
Author  |
Manson, J.H. |
| Title |
Male aggression: a cost of female mate choice in Cayo Santiago rhesus macaques |
Type |
Journal Article |
| Year |
1994 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
48 |
Issue |
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Pages |
473-475 |
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10.1006/anbe.1994.1262 |
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| Call Number |
Equine Behaviour @ team @ |
Serial |
4888 |
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| Author |
Marinier, S.L.; Alexander, A.J. |
| Title |
The use of a maze in testing learning and memory in horses |
Type |
Journal Article |
| Year |
1994 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
39 |
Issue |
2 |
Pages |
177-182 |
| Keywords |
Horses; Learning; Memory; Maze; Exercise |
| Abstract |
Two mazes were used to test the learning ability and memory of horses, and changes in these abilities. Testing was done on four occasions. On Occasion 1, the horses were run through Maze A until they had reached the criterion of three consecutive correct runs. A week later (Occasion 2), they were retested in Maze A to the same criterion as a measure of memory. On Occasion 3,2 months later, the horses were run through Mazes A and B until they reached the criterion. Occasion 4 took place 1 week later when they were run through Mazes A and B. An estimation of changes in ability to learn came from a comparison of results from Occasions 1 and 3. Similarly, changes in ability to remember came from a comparison of results from Occasions 2 and 4. Nine horses with a variable amount of riding training were the subjects. All horses were able to learn the maze, but the ability varied among horses. There was no obvious correlation between quality of handling of the horses and learning ability. Once the horses had learned the maze, they remembered it perfectly on subsequent occasions. There were changes in the memory and learning ability of the horses, but no clear explanation for this could be found. |
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Equine Behaviour @ team @ |
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3573 |
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| Author |
McComb, K.; Clutton-Brock, T. |
| Title |
Is mate choice copying or aggregation responsible for skewed distributions of females on leks? |
Type |
Journal Article |
| Year |
1994 |
Publication |
Proceedings. Biological sciences / The Royal Society |
Abbreviated Journal |
Proc Biol Sci |
| Volume |
255 |
Issue |
1342 |
Pages |
13-19 |
| Keywords |
Animals; Deer/*physiology; Estrus/physiology; Female; Male; Phenotype; Sexual Behavior, Animal/*physiology; Territoriality |
| Abstract |
In several lek-breeding populations of birds and mammals, females arriving on leks tend to join males that already have females in their territories. This might occur either because females have an evolved preference for mating with males that are attractive to other females, or because they join groups of other females to obtain greater safety from predation or dangerous harassment by males. We have previously used controlled experiments to show that oestrous fallow deer females join males with established harems because they are attracted to female groups rather than to the males themselves. Here we demonstrate that the preference for males with females over males without females is specific to oestrous females and weak or absent in anoestrous ones, and that it is not associated with a preference for mating with males that have previously been seen to mate with other females. Furthermore, oestrous females given the choice between males that do not already have females with them show no significant preference for antlered over deantlered males or for older males over younger ones. We conclude that female attraction to other females on the lek is likely to be an adaptation to avoiding harassment in mixed-sex herds. In this situation, a male's ability to maintain the cohesion of his harem may be the principal cause of variation in mating success between males. |
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Department of Zoology, University of Cambridge, U.K |
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English |
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0962-8452 |
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PMID:8153135 |
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1823 |
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| Author |
McLaren, B.E.; Peterson, R.O. |
| Title |
Wolves, Moose, and Tree Rings on Isle Royale |
Type |
Journal Article |
| Year |
1994 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
266 |
Issue |
5190 |
Pages |
1555-1558 |
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| Abstract |
Investigation of tree growth in Isle Royale National Park in Michigan revealed the influence of herbivores and carnivores on plants in an intimately linked food chain. Plant growth rates were regulated by cycles in animal density and responded to annual changes in primary productivity only when released from herbivory by wolf predation. Isle Royale's dendrochronology complements a rich literature on food chain control in aquatic systems, which often supports a trophic cascade model. This study provides evidence of top-down control in a forested ecosystem. |
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Equine Behaviour @ team @ |
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4995 |
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| Author |
McLeod, P.G.; Huntingford, F.A. |
| Title |
Social rank and predator inspection in sticklebacks |
Type |
Journal Article |
| Year |
1994 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
47 |
Issue |
5 |
Pages |
1238-1240 |
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refbase @ user @ |
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525 |
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| Author |
Minton, J.E. |
| Title |
Function of the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system in models of acute stress in domestic farm animals |
Type |
Journal Article |
| Year |
1994 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
| Volume |
72 |
Issue |
7 |
Pages |
1891-1898 |
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no |
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Equine Behaviour @ team @ |
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2942 |
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| Author |
Moehlman, P.D. |
| Title |
Behavior and Ecology of Feral Asses (2nd edition) |
Type |
Manuscript |
| Year |
1994 |
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unpublished |
| Volume |
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Pages |
251 |
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Ph.D. thesis |
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Univ. of Wisconsin, Madison |
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Equine Behaviour @ team @ |
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4674 |
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| Author |
Noë, R.; Hammerstein, P. |
| Title |
Biological markets: supply and demand determine the effect of partner choice in cooperation, mutualism and mating |
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Journal Article |
| Year |
1994 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
| Volume |
35 |
Issue |
1 |
Pages |
1-11 |
| Keywords |
Biomedical and Life Sciences |
| Abstract |
The formation of collaborating pairs by individuals belonging to two different classes occurs in the contexts of reproduction and intea-specific cooperation as well as of inter-specific mutualism. There is potential for partner choice and for competition for access to preferred partners in all three contexts. These selective forces have long been recognised as important in sexual selection, but their impact is not yet appreciated in cooperative and mutualistic systems. The formation of partnerships between members of different classes has much in common with the conclusion of trade agreements in human markets with two classes of traders, like producers and consumers, or employers and employees. Similar game-theoretical models can be used to predict the behaviour of rational traders in human markets and the evolutionarily stable strategies used in biological markets. We present a formal model in which the influence of the market mechanism on selection is made explicit. We restrict ourselves to biological markets in which: (1) Individuals do not compete over access to partners in an agonistic manner, but rather by outcompeting each other in those aspects that are preferred by the choosing party. (2) The commodity the partner has to offer cannot be obtained by the use of force, but requires the consent of the partner. These two restrictions ensure a dominant role for partner choice in the formation of partnerships. In a biological market model the decision to cooperate is based on the comparison between the offers of several potential partners, rather than on the behaviour of a single potential partner, as is implicitly assumed in currently accepted models of cooperation. In our example the members of one class A offer a commodity of fixed value in exchange for a commodity of variable value supplied by the other class, B. We show that when the B-class outnumbers the A-class sufficiently and the cost for the A-class to sample the offers of the B-class are low, the choosiness of the A-class will lead to selection for the supply of high value commodities by the B-class (Fig. 3a). Under the same market conditions, but with a high sampling cost this may still be the evolutionariy stable outcome, but another pair of strategies proves to be stable too: relaxed choosiness of class A coupled with low value commodities supplied by class B (Fig. 3b). We give a number of examples of mating, cooperative and mutualistic markets that resemble the low sampling cost situation depicted in Fig. 3a. |
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Springer Berlin / Heidelberg |
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0340-5443 |
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Equine Behaviour @ team @ |
Serial |
5404 |
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| Author |
Petit, O.; Thierry, B. |
| Title |
Aggressive and peaceful interventions in conflicts in Tonkean macaques |
Type |
Journal Article |
| Year |
1994 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
48 |
Issue |
6 |
Pages |
1427-1436 |
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Abstract. Peaceful interventions in conflicts are an extremely rare phenomenon in most primate species. In contrast to aggressive interventions, they cannot lead to gains in terms of competition. To clarify the function and origin of this behaviour, the patterning and consequences of peaceful and aggressive interventions were studied in a semi-free ranging group of tonkean macaques, Macaca tonkeana. Intense conflicts frequently elicited both types of intervention. Interveners preferentially targeted the initiator of the conflict, who was generally the dominant of the two opponents. Males tended to intervene more than females, especially using peaceful interventions. Interventions were frequently performed on behalf of the most closely kin-related opponent; this was true particularly for aggressive interventions. In peaceful interventions, the intervener was usually dominant over both parties. Lipsmacking, clasping, mounting and social play were mainly used, and were successful in halting aggression. Peaceful interventions were frequently followed by an affinitive interaction, such as grooming, between intervener and target. Peaceful interventions thus appear to protect the beneficiary while preserving the social relationship between intervener and target. The origin of the behaviour can be traced to the epigenetic constraints arising from the species-specific social organization. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5244 |
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| Author |
Pick, D.F.; Lovell, G.; Brown, S.; Dail, D. |
| Title |
Equine color perception revisited |
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Journal Article |
| Year |
1994 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
42 |
Issue |
1 |
Pages |
61-65 |
| Keywords |
Equine; Color perception; Dichromat |
| Abstract |
An attempt to replicate Grzimek (1952; Z. Tierpsychol., 27: 330-338) is reported where a Quarter-Horse mare chose between colored and gray stimuli for food reinforcement. Stimuli varied across a broad range of reflectance values. A double-blind procedure with additional controls for auditory, olfactory, tactile, and position cues was used. The subject could reliably discriminate blue (462 nm) vs. gray, and red (700 nm) vs. gray without regard to reflectance (P<0.001), but could not discriminate green (496 nm) vs. gray. It is suggested that horses are dichromats in a manner similar to swine and cattle. |
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Equine Behaviour @ team @ |
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4368 |
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