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Mesterton-Gibbons, M.; Dugatkin, L.A. |
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Title |
Toward a theory of dominance hierarchies: effects of assessment, group size, and variation in fighting ability |
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Journal Article |
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Year |
1995 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
Behav. Ecol. |
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6 |
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4 |
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416-423 |
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We introduce assessment to the analysis of dominance hierarchies by exploring the effect of an evolutionarily stable fighting rule when there is variation in resource holding potential (RHP) and RHP is not a perfectly reliable predictor of the outcome of a fight. With assessment, the probability of a linear hierarchy decreases with group size but can remain appreciable for groups of up to seven or eight individuals, whereas it decreases virtually to zero if there is no assessment. The probability of a hierarchy that correlates perfectly with RHP is low unless group size is small. |
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10.1093/beheco/6.4.416 |
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447 |
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Wilson, D.S.; Dugatkin, L.A. |
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Title |
A reply to Lombardi & Hurlbert |
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Year |
1996 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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52 |
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2 |
Pages |
423-425 |
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475 |
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Dugatkin, L.A.; Wilson, D.S. |
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Title |
Choice experiments and cognition: a reply to Lamprecht & Hofer |
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Year |
1994 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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47 |
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6 |
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1459-1461 |
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479 |
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Mesterton-Gibbons, M.; Dugatkin, L.A. |
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Title |
Cooperation and the Prisoner's Dilemma: towards testable models of mutualism versus reciprocity |
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Year |
1997 |
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Animal Behaviour. |
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Anim. Behav. |
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54 |
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3 |
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551-557 |
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For the purpose of distinguishing between mutualism and reciprocity in nature, recent work on the evolution of cooperation has both oversimplifed and undersimplified the distinction between these two categories of cooperation. This article addresses the resulting issues of model testability, clarifies the role of time and argues that the category of `pseudo-reciprocity' is an unnecessary complication. |
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480 |
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Author |
Dugatkin, L.A.; Hoglund, J. |
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Title |
Delayed breeding and the evolution of mate copying in lekking species |
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Journal Article |
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Year |
1995 |
Publication |
Journal of Theoretical Biology |
Abbreviated Journal |
J. Theor. Biol. |
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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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Dugatkin, L.A. |
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Title |
Tit for Tat, by-product mutualism and predator inspection: a reply to Connor |
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Journal Article |
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Year |
1996 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
51 |
Issue |
2 |
Pages |
455-457 |
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refbase @ user @ |
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487 |
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Author |
Godin, J.-G.J.; Herdman, E.J.E.; Dugatkin, L.A. |
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Title |
Social influences on female mate choice in the guppy, Poecilia reticulata: generalized and repeatable trait-copying behaviour |
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Journal Article |
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Year |
2005 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
69 |
Issue |
4 |
Pages |
999-1005 |
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In vertebrates, the mating preferences of individual females can be flexible and the probability of a female mating with a particular male can be significantly increased by her having previously observed another conspecific female affiliate and mate with that same male. In theory, such mate-choice-copying behaviour has potentially important consequences for both the genetic and social (`cultural') transmission of female mating preferences. For copying to result in the `cultural inheritance' of mating preferences, individual females must not only copy the mate choice decisions of other females but they also should tend to repeat this type of behaviour (i.e. make similar mating decisions) subsequently and to generalize their socially induced preference for a particular male to other males that share his distinctive characteristics. Here, we show experimentally that individual female guppies, Poecilia reticulata, not only copy the observed mating preferences of other females for particular males, but that the preference now assumed via copying is subsequently repeated and generalized to other males of a similar colour phenotype. These results provide empirical evidence for social enhancement of female preference for particular phenotypic traits of chosen males rather than for the particular males possessing those traits, and thus have important implications for our understanding of the role of social learning in the evolution of female mating preferences and of male epigamic traits. |
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refbase @ user @ |
Serial |
490 |
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Author |
Dugatkin, L.A.; Perlin, M.; Atlas, R. |
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Title |
The Evolution of Group-beneficial Traits in the Absence of Between-group Selection |
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Journal Article |
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Year |
2003 |
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Journal of Theoretical Biology |
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J. Theor. Biol. |
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220 |
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1 |
Pages |
67-74 |
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One specific prediction emerging from trait-group models of natural selection is that when individuals possess traits that benefit other group members, natural selection will favor “cheating” (i.e. not possessing the group-beneficial trait) within groups. Cheating is selected within groups because it allows individuals to avoid bearing the relative costs typically associated with group-beneficial traits, but to still reap the benefits associated with the acts of other group members. Selection between groups favors traits that benefit other group members. The relative strength of within- and between-group selection then determines the equilibrium frequency of those who produce group-beneficial traits and those that do not. Here we demonstrate that individual-level selection, that is selection within groups can also produce an intermediate frequency of such group-beneficial traits by frequency-dependent selection. The models we develop are general in nature, but were inspired by the evolution of antibiotic resistance in bacteria. The theory developed here is distinct from prior work that relies on reciprocity or kinship per'se to achieve cooperation and altruism among group members. |
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refbase @ user @ |
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491 |
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Author |
Godin, J.-G.J.; Dugatkin, L.A. |
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Title |
Variability and repeatability of female mating preference in the guppy |
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Journal Article |
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Year |
1995 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
49 |
Issue |
6 |
Pages |
1427-1433 |
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Models of inter-sexual selection generally assume heritable variation in mating preferences among females within populations. However, little is known about the nature of such variation. The aim of this study was to characterize quantitatively the phenotypic variation in female preference for a sexually selected male trait, body colour pattern, within a population of the Trinidadian guppy, Poecilia reticulata. Significantly more female guppies preferred the more brightly coloured of two similar-sized males presented simultaneously as potential mates. Mating preference scores for individual females were significantly and positively correlated between two repeated trials on successive days. Females were thus individually consistent in their particular choice of mates, and the calculated repeatability of their mating preference was relatively high. Notwithstanding the aforementioned, significant variation existed among females in the degree of their preference for brightly coloured males. Individual mating preference scores were not normally distributed, but were rather skewed to the right (i.e. towards greater values). These results suggest that additive genetic variation for mating preferences based on male colour pattern is maintained, and the opportunity for the further evolution of both bright male colour patterns and female preference for this trait appears to exist in the study population from the Quare River, Trinidad. |
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492 |
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Author |
Dugatkin, L.A.; Earley, R.L. |
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Title |
Group fusion: the impact of winner, loser, and bystander effects on hierarchy formation in large groups |
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Journal Article |
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Year |
2003 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
Behav. Ecol. |
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Volume |
14 |
Issue |
3 |
Pages |
367-373 |
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We present the results of a series of computer simulations that examined the impact of winner, loser, and bystander effects on hierarchy formation in fused groups. These effects and their implications for hierarchy structure and aggressive interactions were first examined in small four-member groups. Subsequent to this, the two small groups were fused into a single larger group. Further interactions took place in this fused group, generating a new hierarchy. Our models demonstrate clearly that winner, loser, and bystander effects strongly influence both the structure and types of interactions that emerge from the fusion of smaller groups. Four conditions produced results in which the same general patterns were uncovered in pre- and postfusion groups: (1) winner effects alone, (2) bystander loser effects alone, (3) winner and bystander winner effects operating simultaneously, and (4) all four effects in play simultaneously. Outside this parameter space, hierarchy structure and the nature of aggressive interactions differed in pre- and postfusion groups. When only loser effects were in play, one of the two clear alphas from the prefused groups dropped in rank in the eight-member fused group. When bystander winner effects were in play, it was difficult to rank any of the eight individuals in the fused group, and players interacted almost exclusively with those that were not in their original four-member group. When loser and bystander loser effects operated simultaneously, two top-ranking individuals emerged in the fused groups, but the relative rank of the other players was difficult to assign. |
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10.1093/beheco/14.3.367 |
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refbase @ user @ |
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519 |
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