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| Author |
PITRA, C.H.; STREICH, W.J.; REINSCH, A.; FICKEL, J. |
| Title |
Die Population des Somali-Wildesels (Equus africanus somalicus Sclater) in menschlicher Obhut: Demographische und genetische Aspekte |
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Journal Article |
| Year |
1995 |
Publication |
Zoologische Garten |
Abbreviated Journal |
Zool. Garten. |
| Volume |
N.F. 65 |
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4 |
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245-257 |
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1472 |
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| Author |
Lefebvre, L. |
| Title |
Ecological correlates of social learning: problems and solutions for the comparative method |
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Journal Article |
| Year |
1995 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
35 |
Issue |
1-3 |
Pages |
163-171 |
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Adaptive specialization; Social learning; Comparative method |
| Abstract |
Interspecific variation in learning and cognition is often accounted for by adaptive specialization, an ecological framework where variation between species in the environmental problems they face is thought to select for quantitatively and/or qualitatively different abilities. Adaptive specialization theory relies on the comparative method for testing its hypotheses and assumes a naturally selected basis for the predicted differences. This review examines social learning as a specialization to group-living and scramble feeding competition. It points out one important problem with current studies in the area, the lack of quantitative controls for confounding variables that may cause type 1 or 2 error in comparative tests. A linear regression technique is proposed to measure and remove interspecific differences on control tests for which there is no predicted adaptive specialization; as in other areas of comparative biology, the adaptive prediction is then made on the residual deviation from the regression of these confounding variables. Examples are given from research on opportunistic Columbids, the group-living feral pigeon Columbia livia, and the territorial Zenaida dove, Zenaida aurita. |
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843 |
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| Author |
Keverne, E.B. |
| Title |
Olfactory learning |
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Journal Article |
| Year |
1995 |
Publication |
Current Opinion in Neurobiology |
Abbreviated Journal |
Curr. Opin. Neurobiol. |
| Volume |
5 |
Issue |
4 |
Pages |
482-488 |
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olfactory perception mammals |
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Unravelling the mechanisms of learning and memory can, and should, be tackled at many levels. Discovery of the huge family of odourant receptor genes provided olfaction with `molecular' respectability similar to that afforded to the visual system. Consequently, molecular studies have dominated the olfactory literature this past year, even to the point of providing a molecular basis of olfactory perception. Needless to say, the molecular approach favours a `hard-wired' system; however, other results suggest that flexibility in the olfactory system provides for certain adaptations that are crucial to the biological needs of mammals. |
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798 |
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Clutton-Brock, T.H.; Parker, G.A. |
| Title |
Sexual coercion in animal societies |
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Journal Article |
| Year |
1995 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
49 |
Issue |
5 |
Pages |
1345-1365 |
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In a wide range of animal species, males coerce females to mate with them, either by physically forcing them to mate, by harassing them until they mate or by punishing persistent refusal to mate. The first section of this paper argues that the possibility of forced copulation can generate arms races between males and females that may have substantial costs to both sexes. In the second section, it is suggested that sexual harassment commonly represents a `war of attrition' between the sexes; existing game theory models that may apply to sexual conflict over mating decisions are reviewed. The third section develops a simple prospective model for the evolution of intimidation by punishment in situations where males can raise the probability that females will accept their advances in future by punishing them for refusal to mate. Where the benefits of sexual coercion to males are high, all three male strategies may develop to a point where they have substantial costs to females. In the final section, evidence that female behaviour is adapted to minimizing these costs is reviewed. |
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757 |
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Fournier, F.; Festa-Bianchet, M. |
| Title |
Social dominance in adult female mountain goats |
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Journal Article |
| Year |
1995 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
49 |
Issue |
6 |
Pages |
1449-1459 |
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The social behaviour of adult female mountain goats, Oreamnos americanus, was studied for 2 years in an unhunted population in west-central Alberta, Canada. Compared with other female ungulates, mountain goat females interacted aggressively much more frequently and their dominance ranks were less stable in time and less age-related. Goats were organized in a non-linear but non-random dominance hierarchy, with many reversals in rank. The best morphological predictor of dominance rank was horn length one year and body mass in the following year. Age was a weaker predictor of dominance status than what has been reported for other female ungulates. The ranks of individual goats changed between years and dominance rank one year was not a good predictor of rank the following year. These results suggest that linearity may only be possible when a contested resource can be defended. Dominant female goats did not forage more efficiently than subordinate goats, and dominant status did not affect the amount of time devoted to alert behaviour. |
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754 |
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McDonnell, S.M.; Haviland, J.C.S. |
| Title |
Agonistic ethogram of the equid bachelor band |
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Journal Article |
| Year |
1995 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
43 |
Issue |
3 |
Pages |
147-188 |
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Equid; Horse; Bachelor; Agonistic; Social behavior; Ethogram |
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An ethogram of agonistic and related behaviors among equid bachelor band members was developed. Several key English-language studies on equids were reviewed to derive a preliminary inventory of specific behaviors to be included in the ethogram. A bachelor band of domestic pony stallions pastured together was observed for approximately 50 daylight hours to obtain detailed descriptions of each behavior, enable photographic and video documentation of behaviors, and identify any behaviors to be added to the preliminary inventory. An initial draft of the ethogram was sent to 65 equine researchers for review. Twenty-eight critical reviews were received and their suggestions considered for the final draft. A total of 49 elemental behaviors including five distinct vocalizations was included in the ethogram. Three complex behavioral sequences were also included. Most of the behaviors catalogued from the direct observation of pastured pony stallions were also found in the equid literature. For many, references to these behaviors specifically among males or bachelor band members were not found. The results offer a practical tool for quantitative research and other studies of equid inter-male behavior as well as for teaching of equid behavior, and should facilitate progress toward development of a complete ethogram for the horse and other equids. |
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refbase @ user @ ; Equine Behaviour @ team @ room B 3.029 |
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749 |
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| Author |
Ellis, L. |
| Title |
Dominance and reproductive success among nonhuman animals: A cross-species comparison |
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Journal Article |
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1995 |
Publication |
Ethology and Sociobiology |
Abbreviated Journal |
Ethol. a. Sociob. |
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16 |
Issue |
4 |
Pages |
257-333 |
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This paper updates and extends Dewsbury's (1982) review of the literature on dominance and reproductive success (RS). The findings from approximately 700 studies are included, over two thirds of which were unavailable to Dewsbury. In order to give a highly condensed and yet meaningful overview, the main findings are represented in four tables, one for male nonprimates, one for female nonprimates, one for male primates, and one for female primates. In the tables for males, findings are analyzed in terms of six different indicators of RS, and in the tables for females, in terms of eight RS indicators. Outside the primate order, evidence largely supported the hypothesis that high-ranking males enjoy greater RS than do subordinate males. For females, studies are more evenly divided between those supporting the hypothesis that high rank and RS are positively correlated and those indicating no significant rank-RS relationship. This may reflect both the lower saliency of hierarchical relationships among females, as well as the lower variability in RS among females, relative to males. Among primates, a complex picture has emerged, especially in the case of males. Much of the complexity appears due to the importance of age and seniority in affecting dominance rank. Also, in some primate species, female preferences for sex partners seem to have little to do with the male's dominance rank, at least at the time mating takes place. Nevertheless, the majority of studies suggest that high- to middle-ranking males have at least a slight lifetime reproductive advantage over the lowest ranking males. |
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722 |
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Heyes, C.M. |
| Title |
Imitation and flattery: a reply to Byrne & Tomasello |
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Journal Article |
| Year |
1995 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
50 |
Issue |
5 |
Pages |
1421-1424 |
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593 |
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Byrnl, R.W.; Tomasello, M. |
| Title |
Do rats ape? |
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Journal Article |
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1995 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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50 |
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5 |
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1417-1420 |
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589 |
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Galef,, Bennett G. |
| Title |
Why behaviour patterns that animals learn socially are locally adaptive |
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Journal Article |
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1995 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
49 |
Issue |
5 |
Pages |
1325-1334 |
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Recent models of the social transmission of behaviour by animals have repeatedly led their authors to the counterintuitive (and counterfactual) conclusion that traditional behaviour patterns in animals are often not locally adaptive. This deduction results from the assumption in such models that frequency of expression of socially learned behaviour patterns is not affected by rewards or punishments contingent upon their expression. An alternative approach to analysis of social learning processes, based on Staddon-Simmelhag's conditioning model, is proposed here. It is assumed that social interactions affect the probability of introduction of novel behaviour patterns into a naive individual's repertoire and that consequences of engaging in a socially learned behaviour determine whether that behaviour continues to be expressed. Review of several recently analysed instances of animal social learning suggests that distinguishing processes that introduce behaviour patterns into the repertoires of individuals from processes that select among behavioural alternatives aids in understanding observed differences in the longevity of various traditional behaviour patterns studied in both laboratory and field. Finally, implications of the present approach for understanding the role of social learning in evolutionary process are discussed. |
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578 |
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