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Author  |
Ellis, L. |
| Title |
Dominance and reproductive success among nonhuman animals: A cross-species comparison |
Type |
Journal Article |
| Year |
1995 |
Publication |
Ethology and Sociobiology |
Abbreviated Journal |
Ethol. a. Sociob. |
| Volume |
16 |
Issue |
4 |
Pages |
257-333 |
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| Abstract |
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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Duncan, I.J.H. |
| Title |
D.G.M. Wood-Gush Memorial Lecture: An applied ethologist looks at the question “Why?” |
Type |
Journal Article |
| Year |
1995 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
44 |
Issue |
2-4 |
Pages |
205-217 |
| Keywords |
Causation; Cognition; Function; Future research; Ontogeny; Phylogeny; States of suffering; Welfare |
| Abstract |
The question “Why does an animal behave as it does?” can be answered in terms of ontogeny, function, phylogeny and causation. The achievements of applied ethology relative to those four approaches are reviewed, gaps in our knowledge are identified and predictions for fruitful avenues of future research are made. Ontogenic studies have been useful in the past and it is suggested that studies of the effects of early experience on the sexual behaviour of animals used in artificial breeding schemes might pay dividends. It is proposed that functional studies should be approached cautiously. More information is required on the process of domestication in order to increase the chances of success in the trend to farm exotic species. Studies on causation are likely to continue to be the mainstay of applied ethological research. It is suggested that within this category, studies on states of suffering, motivation and cognition are urgently required to answer the most pressing questions on animal welfare. |
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Equine Behaviour @ team @ |
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2919 |
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Dugatkin, L.A.; Hoglund, J. |
| Title |
Delayed breeding and the evolution of mate copying in lekking species |
Type |
Journal Article |
| Year |
1995 |
Publication |
Journal of Theoretical Biology |
Abbreviated Journal |
J. Theor. Biol. |
| Volume |
174 |
Issue |
3 |
Pages |
261-267 |
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Recent experimental evidence indicates that females may copy the mate choice of others. Here, we present a model for the evolution of mate copying strategies in lekking species. In the model, all females (copiers and non-copiers) assess male quality, but a copier's assessment of a male's quality increases after males have mated with other females. The model demonstrates that mate copying is favored when breeding late in the season has a relatively high cost. We hope that our results will spur empirical work quantifying the time constraints associated with breeding, thus allowing more direct tests of the model's predictions. |
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482 |
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Dey, S. |
| Title |
Trailer accidents |
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Journal Article |
| Year |
1995 |
Publication |
Journal of Equine Veterinary Science |
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15 |
Issue |
4 |
Pages |
148-149 |
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Equine Behaviour @ team @ |
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4662 |
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| Author |
de Waal, F.B. |
| Title |
Bonobo sex and society |
Type |
Journal Article |
| Year |
1995 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
| Volume |
272 |
Issue |
3 |
Pages |
82-88 |
| Keywords |
Animals; Evolution; Female; Hominidae; Humans; Male; Pan troglodytes/*physiology; Sexual Behavior, Animal/*physiology; Social Behavior |
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Yerkes Regional Primate Research Center, Atlanta |
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English |
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0036-8733 |
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PMID:7871411 |
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no |
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refbase @ user @ |
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206 |
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| Author |
de Vries, H. |
| Title |
An improved test of linearity in dominance hierarchies containing unknown or tied relationships |
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Journal Article |
| Year |
1995 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
50 |
Issue |
5 |
Pages |
1375-1389 |
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Appleby (1983, Anim. Behav., 31, 600-608) described a statistical test, based on the work of Kendall (1962, Rank Correlation Methods), for the significance of linearity in dominance hierarchies. He suggested that unknown relationships should be assigned the value 1/2 and that subsequently the same test procedure can be used. In this paper it is shown that incorrect results are obtained by this method whenever there are unknown relationships. Values of the linearity index are systematically too low. P-values can be too high (underestimating the significance) or too low (overestimating), and seem to differ by not much more than a factor two (respectively a half) from the correct P-value. An improved method is developed for testing linearity in a set of dominance relationships containing unknown relationships. Furthermore, it is argued that, if one admits the possibility of tied dominance relationships, which should indeed be assigned the value 1/2, Landau's linearity index is to be preferred to Kendall's index. A randomization test is developed for assessing the significance of linearity or non-linearity in a set of dominance relationships containing unknown or tied relationships. The test statistic employed in this testing procedure is based on Landau's linearity index, but takes the unknown and tied relationships into account. |
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Equine Behaviour @ team @ |
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4284 |
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Custance DM; Whiten A; Bard KA |
| Title |
Can young chimpanzees imitate arbitrary actions? Hayes and Hayes (1952) revisited |
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Journal Article |
| Year |
1995 |
Publication |
Behavior |
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132 |
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839 |
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Equine Behaviour @ team @ |
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2990 |
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Coussi-Korbel, S.; Fragaszy, D.M. |
| Title |
On the relation between social dynamics and social learning |
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Journal Article |
| Year |
1995 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
50 |
Issue |
6 |
Pages |
1441-1453 |
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Experimental studies on social learning in animals have commonly centred on the psychological processes responsible for learning, and neglected social processes as potential influences on both the likelihood of social learning and the type of information that can be acquired socially. A model relating social learning to social dynamics among members of a group is presented. Three key hypotheses of the model are (1) behavioural coordination in time and/or space supports the process of social learning; (2) different kinds of coordination differentially support acquisition of different kinds of information; and (3) the various forms of behavioural coordination will be differentially affected by social dynamics. Several predictions relating inter-individual and group differences in social dynamics to social learning that follow from these hypotheses are presented. |
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refbase @ user @ |
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568 |
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| Author |
Connor, R.C. |
| Title |
Altruism among non-relatives: alternatives to the 'Prisoner's Dilemma' |
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Journal Article |
| Year |
1995 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends Ecol Evol |
| Volume |
10 |
Issue |
2 |
Pages |
84-86 |
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Triver's model of reciprocal altruism, and its descendants based on the Prisoner's Dilemma model, have dominated thinking about cooperation and altruism between non-relatives. However, there are three alternative models of altruism directed to non-relatives. These models, which are not based on the Prisoner's Dilemma, may explain a variety of phenomena, from allogrooming among impala to helping by non-relatives in cooperatively breeding birds and mammals. |
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Division of Biological Sciences and The Michigan Society of Fellows, Museum of Zoology, University of Michigan, Ann Arbor MI, 48109, USA |
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English |
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0169-5347 |
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PMID:21236964 |
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Equine Behaviour @ team @ |
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5407 |
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| Author |
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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