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Author |
Gilbert, B.K.; Hailman, J.P. |
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Title |
Uncertainty of leadership-rank in fallow deer |
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Journal Article |
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Year |
1966 |
Publication  |
Nature |
Abbreviated Journal |
Nature |
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Volume |
209 |
Issue |
5027 |
Pages |
1041-1042 |
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Keywords |
Animals; Artiodactyla; *Behavior, Animal; Female; *Leadership; Pregnancy |
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0028-0836 |
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PMID:5927524 |
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Serial |
2057 |
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Author |
Matsuzawa, T. |
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Title |
Use of numbers by a chimpanzee |
Type |
Journal Article |
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Year |
1985 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
315 |
Issue |
6014 |
Pages |
57-59 |
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Keywords |
Animals; Behavior, Animal/physiology; Cognition; Female; Mathematics; Pan troglodytes/*physiology |
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Abstract |
Recent studies have examined linguistic abilities in apes. However, although human mathematical abilities seem to be derived from the same foundation as those in language, we have little evidence for mathematical abilities in apes (but for exceptions see refs 7-10). In the present study, a 5-yr-old female chimpanzee (Pan troglodytes), 'Ai', was trained to use Arabic numerals to name the number of items in a display. Ai mastered numerical naming from one to six and was able to name the number, colour and object of 300 types of samples. Although no particular sequence of describing samples was required, the chimpanzee favoured two sequences (colour/object/number and object/colour/number). The present study demonstrates that the chimpanzee was able to describe the three attributes of the sample items and spontaneously organized the 'word order'. |
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0028-0836 |
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Notes |
PMID:3990808 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2793 |
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Author |
McGonigle, B. |
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Title |
Can apes learn to count? |
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Year |
1985 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
315 |
Issue |
6014 |
Pages |
16-17 |
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Keywords |
Animals; Behavior, Animal/physiology; Cognition; Pan troglodytes/*physiology |
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0028-0836 |
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Notes |
PMID:3990806 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2794 |
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Author |
Crook, J.H. |
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Title |
On attributing consciousness to animals |
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Journal Article |
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Year |
1983 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
303 |
Issue |
5912 |
Pages |
11-14 |
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Keywords |
Animals; *Behavior, Animal; Cognition; *Consciousness; Evolution; Learning |
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0028-0836 |
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Notes |
PMID:6843653 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2795 |
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Author |
Wolf, M.; van Doorn, G.S.; Leimar, O.; Weissing, F.J. |
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Title |
Life-history trade-offs favour the evolution of animal personalities |
Type |
Journal Article |
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Year |
2007 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
447 |
Issue |
7144 |
Pages |
581-584 |
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Keywords |
Aggression/physiology/psychology; Animals; Behavior, Animal/*physiology; *Evolution; Exploratory Behavior/physiology; Models, Biological; Personality/*physiology; Predatory Behavior/physiology; Reproduction/physiology; Risk-Taking; Selection (Genetics) |
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Abstract |
In recent years evidence has been accumulating that personalities are not only found in humans but also in a wide range of other animal species. Individuals differ consistently in their behavioural tendencies and the behaviour in one context is correlated with the behaviour in multiple other contexts. From an adaptive perspective, the evolution of animal personalities is still a mystery, because a more flexible structure of behaviour should provide a selective advantage. Accordingly, many researchers view personalities as resulting from constraints imposed by the architecture of behaviour (but see ref. 12). In contrast, we show here that animal personalities can be given an adaptive explanation. Our argument is based on the insight that the trade-off between current and future reproduction often results in polymorphic populations in which some individuals put more emphasis on future fitness returns than others. Life-history theory predicts that such differences in fitness expectations should result in systematic differences in risk-taking behaviour. Individuals with high future expectations (who have much to lose) should be more risk-averse than individuals with low expectations. This applies to all kinds of risky situations, so individuals should consistently differ in their behaviour. By means of an evolutionary model we demonstrate that this basic principle results in the evolution of animal personalities. It simultaneously explains the coexistence of behavioural types, the consistency of behaviour through time and the structure of behavioural correlations across contexts. Moreover, it explains the common finding that explorative behaviour and risk-related traits like boldness and aggressiveness are common characteristics of animal personalities. |
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Address |
Theoretical Biology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands |
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ISSN |
1476-4687 |
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Notes |
PMID:17538618 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4098 |
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Author |
Bell, A.M. |
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Title |
Evolutionary biology: animal personalities |
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Year |
2007 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
447 |
Issue |
7144 |
Pages |
539-540 |
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Keywords |
Aggression/physiology/psychology; Animals; Behavior, Animal/*physiology; *Evolution; Humans; *Models, Biological; Personality/genetics/*physiology; Reproduction/genetics/physiology; Risk-Taking; Selection (Genetics) |
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1476-4687 |
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Notes |
PMID:17538607 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4099 |
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Author |
Berger, J. |
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Title |
Induced abortion and social factors in wild horses |
Type |
Journal Article |
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Year |
1983 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
303 |
Issue |
5912 |
Pages |
59-61 |
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Keywords |
Abortion, Induced/*veterinary; Abortion, Veterinary/*etiology; Aggression/physiology; Animals; Evolution; Female; Horses/*physiology; Humans; Pregnancy; Sexual Behavior, Animal/*physiology |
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Abstract |
Much evidence now suggests that the postnatal killing of young in primates and carnivores, and induced abortions in some rodents, are evolved traits exerting strong selective pressures on adult male and female behaviour. Among ungulates it is perplexing that either no species have developed convergent tactics or that these behaviours are not reported, especially as ungulates have social systems similar to those of members of the above groups. Only in captive horses (Equus caballus) has infant killing been reported. It has been estimated that 40,000 wild horses live in remote areas of the Great Basin Desert of North America (US Department of Interior (Bureau of Land Management), unpublished report), where they occur in harems (females and young) defended by males. Here I present evidence that, rather than killing infants directly, invading males induce abortions in females unprotected by their resident stallions and these females are then inseminated by the new males. |
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0028-0836 |
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Notes |
PMID:6682487 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4365 |
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Author |
Conradt, L.; Roper, T.J. |
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Title |
Group decision-making in animals |
Type |
Journal Article |
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Year |
2003 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
421 |
Issue |
6919 |
Pages |
155-158 |
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Keywords |
Animals; Behavior, Animal/*physiology; *Decision Making; Democracy; Group Processes; *Models, Biological; Population Density; Social Behavior |
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Abstract |
Groups of animals often need to make communal decisions, for example about which activities to perform, when to perform them and which direction to travel in; however, little is known about how they do so. Here, we model the fitness consequences of two possible decision-making mechanisms: 'despotism' and 'democracy'. We show that under most conditions, the costs to subordinate group members, and to the group as a whole, are considerably higher for despotic than for democratic decisions. Even when the despot is the most experienced group member, it only pays other members to accept its decision when group size is small and the difference in information is large. Democratic decisions are more beneficial primarily because they tend to produce less extreme decisions, rather than because each individual has an influence on the decision per se. Our model suggests that democracy should be widespread and makes quantitative, testable predictions about group decision-making in non-humans. |
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Address |
School of Biological Sciences, University of Sussex, Brighton BN1 9QG, UK. l.conradt@sussex.ac.uk |
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0028-0836 |
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Notes |
PMID:12520299 |
Approved |
no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5136 |
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Author |
Kaplan, A.I.; Borodovskii, M.I. |
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Title |
[Alternative animal behavior: a model and its statistical characteristics] |
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Journal Article |
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Year |
1989 |
Publication |
Nauchnye Doklady Vysshei Shkoly. Biologicheskie Nauki |
Abbreviated Journal |
Nauchnye Doki Vyss Shkoly Biol Nauki |
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Issue |
3 |
Pages |
29-32 |
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Keywords |
Animals; *Behavior, Animal; Cognition; Male; Mathematics; *Models, Biological; *Models, Statistical; Rats; Reinforcement (Psychology) |
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Abstract |
The rats' alternative behaviour in T-maze at simultaneous two-sided food refreshment in 13 trials a day during 6 days has been studied. It has been found that in the first testing days the indexes of alternative behaviour of animals correspond to the characteristics of the random alternation. However, on the 5-6th day of testing in the overwhelming majority of rats the true deviation of alternation index above or below than the theoretical values has been revealed. A question on the existence of two strategies of cognitive behaviour alteration and perseveration in rat population is under discussion. |
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Russian |
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Original Title |
Al'ternativnoe povedenie zhivotnykh: model' i statisticheskie kharakteristiki |
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ISSN |
0470-4606 |
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Notes |
PMID:2742929 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2799 |
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Author |
Hemelrijk, C.K.; Wantia, J. |
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Title |
Individual variation by self-organisation |
Type |
Journal Article |
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Year |
2005 |
Publication |
Neuroscience and biobehavioral reviews |
Abbreviated Journal |
Neurosci Biobehav Rev |
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Volume |
29 |
Issue |
1 |
Pages |
125-136 |
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Keywords |
Aggression; Animals; Behavior, Animal/*physiology; Competitive Behavior/*physiology; Female; Humans; *Individuality; Male; Models, Psychological; Sex Characteristics; *Social Dominance; Time Factors |
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Abstract |
In this paper, we show that differences in dominance and spatial centrality of individuals in a group may arise through self-organisation. Our instrument is a model, called DomWorld, that represents two traits that are often found in animals, namely grouping and competing. In this model individual differences grow under the following conditions: (1) when the intensity of aggression increases and grouping becomes denser, (2) when the degree of sexual dimorphism in fighting power increases. In this case the differences among females compared to males grow too, (3) when, upon encountering another individual, the tendency to attack is 'obligate' and not conditional, namely 'sensitive to risks'. Results resemble phenomena described for societies of primates, mice, birds and pigs. |
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Theoretical Biology, University of Groningen, NN Haren, The Netherlands. hemelrij@ifi.unizh.ch |
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ISSN |
0149-7634 |
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PMID:15652260 |
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no |
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Call Number |
refbase @ user @ |
Serial |
443 |
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