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Author |
Feh, C. |
Title |
Alliances and reproductive success in Camargue stallions |
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Journal Article |
Year |
1999 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
Volume |
57 |
Issue |
3 |
Pages |
705-713 |
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A study of a herd of Camargue horsesEquus caballus, showed that while the majority of high-ranking stallions held single-male harems, some sons of low-ranking mares, being low ranking themselves, formed alliances that could last a lifetime. The two stallions were each other's closest associate and preferential grooming partner. Alliances were based on coalitions in which either both partners confronted an intruder synchronously or the dominant of the pair tended the female(s) while the subordinate simultaneously displayed towards the rival. Alliance partners were of similar age but were not more closely related to each other than to other stallions in the herd. Long-term paternity data revealed that subordinates sired close to a quarter of the foals born into the alliance group, and significantly more foals than low-ranking stallions in the herd adopting a `sneak'-mating strategy. The dominant appeared to benefit from the presence of his subordinate partner. Fights occurred all year round, and the subordinate stallion of each alliance pair fought outside competitors more than twice as often as the dominant. Forming short-term alliances before defending mares on their own may enhance long-term reproductive success for both partners. Other benefits to both partners include higher survivorship of their foals and increased access to proven reproductive mares. These results suggest that the relationship between alliance partners is based on mutualism, but several conditions for reciprocity seem to be fulfilled: the benefit to the dominant (assistance in fights), and the benefit to the subordinate (access to reproduction), are both costly to the other partner and delayed in time. |
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469 |
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Wilson, D.S.; Dugatkin, L.A. |
Title |
A reply to Lombardi & Hurlbert |
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Journal Article |
Year |
1996 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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52 |
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2 |
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423-425 |
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475 |
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Author |
Dugatkin, L.A.; Wilson, D.S. |
Title |
Choice experiments and cognition: a reply to Lamprecht & Hofer |
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Journal Article |
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. |
Title |
Cooperation and the Prisoner's Dilemma: towards testable models of mutualism versus reciprocity |
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Journal Article |
Year |
1997 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
Volume |
54 |
Issue |
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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Lafleur, D.L.; Lozano, G.A.; Sclafani, M. |
Title |
Female mate-choice copying in guppies,Poecilia reticulata: a re-evaluation |
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Journal Article |
Year |
1997 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
Volume |
54 |
Issue |
3 |
Pages |
579-586 |
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It has been argued that intraspecific mate-choice copying can be adaptive under certain conditions. Dugatkin's (1992,Am. Nat.139, 1384-1389) work with guppies,Poecilia reticulataremains the most influential experimental demonstration of this phenomenon. We replicated Dugatkin's work using several choice criteria to ensure that our results were not dependent upon any single method of judging mate choice. We also tested our findings against two null hypotheses of differing stringency. Irrespective of the choice criteria or null hypothesis used, we did not observe any relationship between female mate choice and copying. We conclude that further experimental evidence of female mate-choice copying is required before the existence of this behaviour can be affirmed. |
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484 |
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Stephens, D.W.; Anderson, J.P.; Benson, K.E. |
Title |
On the spurious occurrence of Tit for Tat in pairs of predator-approaching fish |
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Journal Article |
Year |
1997 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
Volume |
53 |
Issue |
1 |
Pages |
113-131 |
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An experimental analysis of the movements of predator-approaching fish is presented. The experiments evaluated two competing hypotheses. (1) Predator-approaching fish play the game-theoretical strategy Tit for Tat. Alternatively, (2) the movements of predator-approaching fish superficially resemble Tit for Tat, because fish independently orient to a predator and simultaneously attempt to stay close together. Experimental subjects were mosquito fish,Gambusia affinisapproaching a green sunfish,Lepomis cyanellusTwo experiments were performed. Experiment 1 replicated results of Milinski (1987) and Dugatkin (1991), showing thatGambusiacome closer to a visible predator when a mirror is oriented parallel to their direction of travel. Experiment 2 attempted to separate the effects of common orientation and social cohesion in accounting for the frequency of Tit-for-Tat-like motions in pairs of predator-approachingGambusia. Results of experiment 2 suggest that a simple additive combination of the effects of (1) social cohesion in the absence of a visible predator and (2) orientation to a visible predator in the absence of a visible companion can account for the observed frequency of Tit-for-Tat-like motions for pairs of predator-approachingGambusia. It is concluded that predator approach in shoaling fishes is probably a simple by-product mutualism, rather than cooperation maintained by reciprocity in a Prisoner's Dilemma. |
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486 |
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Author |
Dugatkin, L.A. |
Title |
Tit for Tat, by-product mutualism and predator inspection: a reply to Connor |
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Journal Article |
Year |
1996 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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51 |
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2 |
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455-457 |
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487 |
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Author |
Hare, J.F. |
Title |
Lee Alan Dugatkin, Principles of Animal Behavior, Norton, New York (2004) Pp. xx+596. Price $80.00 |
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Journal Article |
Year |
2005 |
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Animal Behaviour. |
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Anim. Behav. |
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69 |
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1 |
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247-248 |
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489 |
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Godin, J.-G.J.; Herdman, E.J.E.; Dugatkin, L.A. |
Title |
Social influences on female mate choice in the guppy, Poecilia reticulata: generalized and repeatable trait-copying behaviour |
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Journal Article |
Year |
2005 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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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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490 |
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Godin, J.-G.J.; Dugatkin, L.A. |
Title |
Variability and repeatability of female mating preference in the guppy |
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Journal Article |
Year |
1995 |
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Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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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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