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Author |
Beaver, B.V. |
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Title  |
Problems & values associated with dominance |
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Journal Article |
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Year |
1981 |
Publication |
Veterinary medicine, small animal clinician : VM, SAC |
Abbreviated Journal |
Vet Med Small Anim Clin |
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Volume |
76 |
Issue |
8 |
Pages |
1129-1131 |
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Keywords |
Animals; *Animals, Domestic; *Behavior, Animal; Cats; Cattle; Dogs; Horses; *Social Dominance; Swine |
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English |
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0042-4889 |
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PMID:6914851 |
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Call Number |
refbase @ user @ |
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678 |
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Author |
Barnard, C.J.; Sibly, R.M. |
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Title |
Producers and scroungers: A general model and its application to captive flocks of house sparrows |
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Journal Article |
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Year |
1981 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
29 |
Issue |
2 |
Pages |
543-550 |
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Abstract |
Many forms of interaction within and between species appear to be based on `scrounger' individuals or species exploiting a limited resource provided `producers'. A mathematical model is presented which shows whether or not scroungers are maintained in a group, depending on their frequency and the group size. Some of the predictions of the model were tested in captive flocks of house sparrows Passer domesticus L. Here the scroungers obtained most of their food (mealworms) by interaction and the producers found most of their food by actively foraging: the pay-off to each type was measured as mealworm capture rate. Neither type changed strategy opportunistically in response to instantaneous flock composition but, not surprisingly, scroungers fared better when one of more producers were present. However, scrougers did much worse than expected when greatly outnumbered by producers, perhaps because producers then found the available food very quickly. |
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Call Number |
Equine Behaviour @ team @ |
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4200 |
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Author |
Bean, P. |
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Title |
Punishment: A Philosophical and Criminological Enquiry |
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Miscellaneous |
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1981 |
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Equine Behaviour @ team @ |
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4851 |
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Author |
Gillan DJ; Premack D; Woodruff G |
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Title |
Reasoning in the chimpanzee: I. Analogical reasoning |
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1981 |
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J. Exp. Psychol.: Anim. Behav. Process. |
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7 |
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1 |
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Equine Behaviour @ team @ |
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3063 |
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Author |
COUGOUILLE-GAUFFRETEAU B et al, |
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Title |
Research on the consequences of the injection of male hormones... |
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Year |
1981 |
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Comptes red Seanc Acad Sci |
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292 |
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1073-1076 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Call Number |
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Serial |
993 |
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Author |
Parker, G.A.; Rubenstein, D.I. |
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Title |
Role assessment, reserve strategy, and acquisition of information in asymmetric animal conflicts |
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Journal Article |
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Year |
1981 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
29 |
Issue |
1 |
Pages |
221-240 |
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Abstract |
It was formerly argued that alternative evolutionarily stable strategies (ESSs) are possible for animal contests characterized by some asymmetry that can be perceived with perfect accuracy. Where roles A and B refer to the asymmetry between opponents, ESSs are: [`]fight when A, retreat when B', and vice versa. Either can be an ESS, but only if the [`]reserve strategy' (=what an animal does when it fights) is sufficiently damaging. We examine the [`]war of attrition' (winner = opponent that persists longer). In a population at either ESS, reserve strategy is never normally shown; it is therefore subject to drift unless the selective action of rare individuals which break the convention is considered. These could arise either by mutation or by mistakes in role assessment. When mutations and mistakes simply specify that occasionally an animal fights when it [`]should' retreat, selection adjusts reserve strategy to a level where only one ESS (the [`]commonsense' ESS) is possible, if the asymmetry is relevant to payoff. Thus for asymmetries in fighting ability or resource value, the individual with the lower score will retreat. However, we are particularly concerned with cases where both payoff-relevant aspects (fighting ability and resource value) are asymmetric. If opponents sustain contest costs at rates KA and KB, and their resource values are VA and VB, an [`]optimal assessor' strategy defined by the interaction between the two asymmetries, is a unique ESS. It obeys the rule [`]fight on estimating role A, where VA/KA>VB/KB; retreat in B'. If mistakes can occur in both roles, but are very rate, the ESS is not fundamentally altered though there will be infinitesimal tendencies for persisting in role B. Selection to improve assessment abilities intensifies as abilities improve, but is weak if roles A and B are rather similar. Over a range of similarity between roles, an [`]owner wins' convention may be adopted if ownership correlates positively with role A and an individual cannot tell when it would otherwise pay him to break the convention. We also examine a contest in which information about roles can be acquired only during a contest itself, and at a cost. Much depends on the rate at which information is acquired relative to the rate at which costs are expended, and on whether contests normally escalate in intensity, remain at the same level, or de-escalate. Selection favours short contests when costs are high relative to resource value, where the outcome of a round contains much information about fighting ability, and where the actual disparity in fighting ability is large. |
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0003-3472 |
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Call Number |
Equine Behaviour @ team @ |
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5325 |
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Author |
CLAYTON HM et al, |
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Title |
Some studies of comparative aspects of sexual behaviour in ponies and donkeys |
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Journal Article |
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Year |
1981 |
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Abbreviated Journal |
App Anim Ethol |
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Volume |
7 |
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Pages |
169-174 |
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from Professor Hans Klingels Equine Reference List |
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988 |
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Author |
Groves Cp, W.D. |
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Title |
Studies on the taxonomy and phylogeny of the genus Equus |
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Journal Article |
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1981 |
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Mammalia |
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45 |
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321-354 |
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from Professor Hans Klingels Equine Reference List |
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1137 |
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Author |
Prescott J, |
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Title |
Suckling behavior of Llama and Chapman's Zebra in captivity |
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1981 |
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Appl Anim Ethol |
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7 |
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293-299 |
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from Professor Hans Klingels Equine Reference List |
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1483 |
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Author |
R. A. J. Taylor |
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Title |
The Behavioural Basis of Redistribution I. The Delta -Model Concept |
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1981 |
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The Journal of Animal Ecology |
Abbreviated Journal |
T. J. Anim. Ecol. |
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50 |
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2 |
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573-586 |
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(1) A conceptual model is developed in which spatial behaviour is density-dependent. The behaviour is classified as congregatory or migratory according to whether it results in movement towards or away from population concentrations. (2) Spatial behaviour is shown to result from both individual and population interactions. (3) The stability properties of the model are explored and it is shown how, under particular conditions, populations obeying the model have a population density regulating mechanism. (4) The similarity between the model and the potential energy curve of physics is noted, but it is emphasized that this is a behavioural not a physical model. |
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refbase @ user @ |
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720 |
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