| Records |
| Author |
Houpt, K. A.; Kusonose, R. |
| Title |
Genetic of behaviour |
Type |
Book Chapter |
| Year |
2000 |
Publication |
Genetics of the Horse |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
281-306 |
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| Publisher |
Cab Intl |
Place of Publication |
Wallingford Oxfordshire |
Editor |
Bowling,A. T. ; Ruvinsky, A. |
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ISBN |
978-0851994291 |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5021 |
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| Author |
Oakenfull, E.A.; Lim, H.; Ryder, O. |
| Title |
A survey of equid mitochondrial DNA: Implications for the evolution, genetic diversity and conservation of Equus |
Type |
Journal Article |
| Year |
2000 |
Publication |
Conservation Genetics |
Abbreviated Journal |
Conservat Genet |
| Volume |
1 |
Issue |
4 |
Pages |
341-355 |
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| Abstract |
The evolution, taxonomy and conservation of the genus Equuswere investigated by examining the mitochondrial DNA sequences of thecontrol region and 12S rRNA gene. The phylogenetic analysis of thesesequences provides further evidence that the deepest node in thephylogeny of the extant species is a divergence between twolineages; one leading to the ancestor of modern horses (E.ferus, domestic and przewalskii) and the other to thezebra and ass ancestor, with the later speciation events of the zebrasand asses occurring either as one or more rapid radiations, or withextensive secondary contact after speciation. Examination of the geneticdiversity within species suggested that two of the E. hemionussubspecies (E. h. onager and E. h. kulan) onlyrecently diverged, and perhaps, are insufficiently different to beclassified as separate subspecies. The genetic divergence betweendomestic and wild forms of E. ferus (horse) and E.africanus (African ass) was no greater than expected within anequid species. In E. burchelli (plains zebra) there was anindication of mtDNA divergence between populations increasing withdistance. The implications of these results for equid conservation arediscussed and recommendations are made for conservation action. |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5039 |
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| Author |
Byrne, R.W. |
| Title |
How monkeys find their way: leadership, coordination, and cognitive maps of African baboons. |
Type |
Book Chapter |
| Year |
2000 |
Publication |
On the Move: How and Why Animals Travel in Groups |
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Issue |
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Pages |
491–518 |
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Chicago University Press |
Place of Publication |
Chicago |
Editor |
Boinski, S.; Garber, P.A. |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5146 |
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| Author |
Holekamp, K.E, Boydston, E.E; Smale, L. |
| Title |
Group Travel in Social Carnivores |
Type |
Book Whole |
| Year |
2000 |
Publication |
On the Move: How and Why Animals Travel in Groups |
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Issue |
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Pages |
587-627 |
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Chicago University Press |
Place of Publication |
Chicago |
Editor |
Boinski, S.; Garber, P.A. |
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no |
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Equine Behaviour @ team @ |
Serial |
5147 |
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| Author |
Engh, A.L.; Esch, K.; Smale, L.; Holekamp, K.E. |
| Title |
Mechanisms of maternal rank 'inheritance' in the spotted hyaena, Crocuta crocuta |
Type |
Journal Article |
| Year |
2000 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
60 |
Issue |
3 |
Pages |
323-332 |
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| Abstract |
Maternal rank [`]inheritance', the process by which juveniles attain positions in the dominance hierarchy adjacent to those of their mothers, occurs in both cercopithecine primates and spotted hyaenas. Maternal rank is acquired in primates through defensive maternal interventions, coalitionary support and unprovoked aggression ([`]harassment') directed by adult females towards offspring of lower-ranking individuals. Genetic heritability of rank-related traits plays a negligible role in primate rank acquisition. Because the social lives of Crocuta and cercopithecine primates share many common features, we examined whether the same mechanisms might operate in both taxa to promote maternal rank [`]inheritance'. We observed a large clan of free-living spotted hyaenas in Kenya to test predictions of four mechanistic hypotheses. Hyaena rank acquisition did not appear to be directly affected by genetic heritability. Unprovoked aggression from adult female hyaenas was not directed preferentially towards low-ranking cubs. However, high-ranking mothers intervened on behalf of their cubs more frequently and more effectively than low-ranking mothers. Maternal interventions and supportive coalitions appeared to reinforce aggression directed at [`]appropriate' conspecific targets, whereas coalitionary aggression directed at cubs apparently functioned to extinguish their aggressive behaviour towards [`]inappropriate' targets. Young hyaenas and primates thus appear to [`]inherit' their mothers' ranks by strikingly similar mechanisms. |
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0003-3472 |
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no |
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Equine Behaviour @ team @ |
Serial |
5242 |
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| Author |
Reebs, S.G. |
| Title |
Can a minority of informed leaders determine the foraging movements of a fish shoal? |
Type |
Journal Article |
| Year |
2000 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
59 |
Issue |
2 |
Pages |
403-409 |
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| Abstract |
There is no information on whether the daily foraging movements of fish shoals are the result of chance, the collective will of all shoalmates, or the leadership of a few individuals. This study tested the latter possibility. Shoals of 12 golden shiners, Notemigonus crysoleucas, were trained to expect food around midday in one of the brightly lit corners of their tank. They displayed daily food-anticipatory activity by leaving the shady area of their tank and spending more and more time in the food corner up to the normal time of feeding. Past this normal time they remained in the shade, even on test days when no food was delivered. Most of these experienced individuals were then replaced by naïve ones. The resulting ratio of experienced:naïve fish could be 5:7, 3:9 or 1:11. On their own, naïve individuals would normally spend the whole day in the shade, but in all tests the experienced individual(s) were able to entrain these more numerous naïve fish out of the shade and into the brightly lit food corner at the right time of day. Entrainment was stronger in the 5:7 than in the 1:11 experiment. The test shoals never split up and were always led by the same fish, presumably the experienced individuals. These results indicate that in a strongly gregarious species, such as the golden shiner, a minority of informed individuals can lead a shoal to food, either through social facilitation of foraging movements or by eliciting following behaviour. |
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0003-3472 |
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no |
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Equine Behaviour @ team @ |
Serial |
5255 |
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| Author |
Johnstone, R.A.; Dugatkin, L.A. |
| Title |
Coalition formation in animals and the nature of winner and loser effects |
Type |
Journal Article |
| Year |
2000 |
Publication |
Proceedings of the Royal Society B: Biological Sciences |
Abbreviated Journal |
Proc. Roy. Soc. Lond. B Biol. Sci. |
| Volume |
267 |
Issue |
1438 |
Pages |
17-21 |
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| Abstract |
Coalition formation has been documented in a diverse array of taxa, yet there has been little formal analysis of polyadic interactions such as coalitions. Here, we develop an optimality model which examines the role of winner and loser effects in shaping coalition formation. We demonstrate that the predicted patterns of alliances are strongly dependent on the way in which winner and loser effects change with contestant strength. When winner and loser effects decrease with the resource-holding power (RHP) of the combatants, coalitions will be favoured between the strongest members of a group, but not between the weakest. If, in contrast, winner and loser effects increase with RHP, exactly the opposite predictions emerge. All other things being equal, intervention is more likely to prove worthwhile when the beneficiary of the aid is weaker (and its opponent is stronger), because the beneficiary is then less likely to win without help. Consequently, intervention is more probable when the impact of victory on the subsequent performance of a combatant increases with that individual's strength because this selects for intervention in favour of weaker combatants. The published literature on hierarchy formation does not reveal how winner and loser effects actually change with contestant strength and we therefore hope that our model will spur others to collect such data; in this light we suggest an experiment which will help to elucidate the nature of winner and loser effects and their impact on coalition formation in animals. |
| Address |
* aggression * dominance * hierarchy * intervention * reciprocity |
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10.1098/rspb.2000.0960 |
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no |
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Equine Behaviour @ team @ |
Serial |
5290 |
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| Author |
Allman, J.M. |
| Title |
Evolving brains. |
Type |
Book Whole |
| Year |
2000 |
Publication |
Evolving brains |
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How did the human brain with all its manifold capacities evolve from basic functions in simple organisms that lived nearly a billion years ago? John Allman addresses this question in Evolving Brains, a provocative study of brain evolution that introduces readers to some of the most exciting developments in science in recent years. |
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Scientific American Library |
Place of Publication |
New York |
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978-0716760382 |
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no |
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Equine Behaviour @ team @ |
Serial |
5460 |
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| Author |
Garber, P.; Boinski, S. |
| Title |
Group Movement in Social Primates and Other Animals: Patterns, Processes, and Cognitive Implications. |
Type |
Book Whole |
| Year |
2000 |
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University of Chicago Press |
Place of Publication |
Chicago |
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no |
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Equine Behaviour @ team @ |
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5466 |
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| Author |
Fritz, J.; Bisenberger, A.; Kotrschal, K. |
| Title |
Stimulus enhancement in greylag geese: socially mediated learning of an operant task |
Type |
Journal Article |
| Year |
2000 |
Publication |
Animal Behaviour |
Abbreviated Journal |
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| Volume |
59 |
Issue |
6 |
Pages |
1119-1125 |
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| Abstract |
We recently observed the spreading of a novel tradition in a flock of semiferal greylag geese, Anser anser: an increasing number of individuals began to bite and chew the stems of butterbur, Petasites hybridus. Because this behaviour spread particularly fast within families, social learning seemed to be involved. We therefore designed an experiment with hand-reared goslings, which were socially imprinted on humans, to investigate whether and how the observation of an experienced tutor affects the acquisition of a novel skill. Goslings had to open the gliding lid of a box to get at a food reward. To each of seven hand-reared observers a human tutor demonstrated where and how to open the lid, whereas seven controls remained untutored. All observers learned to perform the task but only one of the controls succeeded. The observers explored more often at the position shown by the tutor than elsewhere and seemingly learned by trial and error. In contrast, control birds explored primarily at positions that did not allow them to open the box. These results indicate that in greylag goslings the observation of an experienced model facilitates the learning of an operant task. We conclude that stimulus enhancement followed by operant conditioning were the mechanisms involved, which may have accounted for the fast spread of the stem-chewing tradition between family members. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5962 |
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