Records |
Author |
Vollmerhaus, B.; Roos, H.; Gerhards, H.; Knospe, C. |
Title |
[Phylogeny, form and function of canine teeth in the horse] |
Type |
Journal Article |
Year |
2003 |
Publication |
Anatomia, histologia, embryologia |
Abbreviated Journal |
Anat Histol Embryol |
Volume |
32 |
Issue |
4 |
Pages |
212-217 |
Keywords |
Animals; Cuspid/*anatomy & histology/radiography; Evolution; Horses/*anatomy & histology; Male; Phylogeny; *Social Dominance |
Abstract |
The canine teeth of the horse developed phylogenically from the simple, pointed, short-rooted tooth form of the leaf eating, in pairs living, Eocene horse Hyracotherium and served up to the Oligocene as a means of defense (self preservation). In the Miocene the living conditions of the Merychippus changed and they took to eating grass and adopted as a new behavior the life in a herd. The canine teeth possibly played an important role in fights for social ranking; they changed from a crown form to knife-like shape. In the Pliohippus the canine tooth usually remained in male horses and since the Pliocene, it contributed to the fights between stallions, to ensure that the offspring only came from the strongest animals (preservation of the species). Form and construction of the canine tooth are described and discussed in detail under the above mentioned phylogenic and ethologic aspects. |
Address |
Institut fur Tieranatomie und Chirurgische Tierklinik der Universitat Munchen, Veterinarstrasse 13, D 80539 Munchen, Deutschland. c-neumueller@anat.vetmed.uni-muenchen.de |
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Place of Publication |
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Language |
German |
Summary Language |
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Original Title |
[Zur Phylogenie, Form und Funktion der Dentes canini des Pferdes] |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0340-2096 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:12919071 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
672 |
Permanent link to this record |
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Author |
Shettleworth, S.J. |
Title |
Cognitive science: rank inferred by reason |
Type |
Journal Article |
Year |
2004 |
Publication |
Nature |
Abbreviated Journal |
Nature |
Volume |
430 |
Issue |
7001 |
Pages |
732-733 |
Keywords |
Animals; Cognition/*physiology; Group Structure; Male; *Social Dominance; Songbirds/*physiology |
Abstract |
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Address |
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Place of Publication |
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Language |
English |
Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1476-4687 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:15306792 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
365 |
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Author |
Rands, S.A.; Cowlishaw, G.; Pettifor, R.A.; Rowcliffe, J.M.; Johnstone, R.A. |
Title |
The emergence of leaders and followers in foraging pairs when the qualities of individuals differ |
Type |
Journal Article |
Year |
2008 |
Publication |
BMC Evolutionary Biology |
Abbreviated Journal |
BMC Evol Biol |
Volume |
8 |
Issue |
|
Pages |
51 |
Keywords |
Animals; *Feeding Behavior; *Food Chain; *Models, Biological; *Social Dominance |
Abstract |
BACKGROUND: Foraging in groups offers animals a number of advantages, such as increasing their likelihood of finding food or detecting and avoiding predators. In order for a group to remain together, there has to be some degree of coordination of behaviour and movement between its members (which may in some cases be initiated by a decision-making leader, and in other cases may emerge as an underlying property of the group). For example, behavioural synchronisation is a phenomenon where animals within a group initiate and then continue to conduct identical behaviours, and has been characterised for a wide range of species. We examine how a pair of animals should behave using a state-dependent approach, and ask what conditions are likely to lead to behavioural synchronisation occurring, and whether one of the individuals is more likely to act as a leader. RESULTS: The model we describe considers how the energetic gain, metabolic requirements and predation risks faced by the individuals affect measures of their energetic state and behaviour (such as the degree of behavioural synchronisation seen within the pair, and the value to an individual of knowing the energetic state of its colleague). We explore how predictable changes in these measures are in response to changes in physiological requirements and predation risk. We also consider how these measures should change when the members of the pair are not identical in their metabolic requirements or their susceptibility to predation. We find that many of the changes seen in these measures are complex, especially when asymmetries exist between the members of the pair. CONCLUSION: Analyses are presented that demonstrate that, although these general patterns are robust, care needs to be taken when considering the effects of individual differences, as the relationship between individual differences and the resulting qualitative changes in behaviour may be complex. We discuss how these results are related to experimental observations, and how the model and its predictions could be extended. |
Address |
Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK. sean.rands@bristol.ac.uk |
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English |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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ISSN |
1471-2148 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:18282297 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
5126 |
Permanent link to this record |
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Author |
Puppe, B. |
Title |
[Social dominance and rank relationships in domestic pigs: a critical review] |
Type |
Journal Article |
Year |
1996 |
Publication |
Berliner und Munchener Tierarztliche Wochenschrift |
Abbreviated Journal |
Berl Munch Tierarztl Wochenschr |
Volume |
109 |
Issue |
11-12 |
Pages |
457-464 |
Keywords |
Animals; Animals, Domestic; Animals, Wild; Female; Male; Models, Psychological; *Social Behavior; *Social Dominance; Swine/*psychology |
Abstract |
Viewing dominance as an attribute of repeated agonistic interactions between two individuals, the present paper reviews theoretical approaches towards concepts of dominance, methods of measurement, and basic principles and problems connected with social dominance in domestic pigs. Domestic pigs are able to establish social organization structures during all stages of their ontogeny. According to definition, dominance relationships occur when a consistent asymmetry of the result of dyadic agonistic interactions can be assessed. This must not necessarily be connected immediately with a better availability of resources, or a high stability of existing dominance relationships, or a functional definition of dominance. When sociometric characteristics are calculated, it seems to be appropriate to use them for different levels of a biological system (individual, individual pair, group). Investigations of social behaviour and dominance in farm animals should take into account that mechanisms of social behaviour in confined environments are often carried out in parts only. Connections of the dominance concept with other concepts of behavioural regulation should be theoretically considered and further investigated by experimental studies. |
Address |
Forschungsbereich Physiologische Grundlagen der Tierhaltung des Forschungsinstituts fur die Biologie landwirtschaftlicher Nutztiere Dummerstorf-Rostock |
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Language |
German |
Summary Language |
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Original Title |
Soziale Dominanz- und Rangbeziehungen beim Hausschwein: eine kritische Ubersicht |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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ISSN |
0005-9366 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:8999780 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2861 |
Permanent link to this record |
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Author |
Paz-y-Miño C. G.; Bond, A.B.; Kamil, A.C.; Balda, R.P. |
Title |
Pinyon jays use transitive inference to predict social dominance |
Type |
Journal Article |
Year |
2004 |
Publication |
Nature |
Abbreviated Journal |
Nature |
Volume |
430 |
Issue |
7001 |
Pages |
778-781 |
Keywords |
Animals; Cognition/*physiology; Group Structure; Male; *Social Dominance; Songbirds/*physiology |
Abstract |
Living in large, stable social groups is often considered to favour the evolution of enhanced cognitive abilities, such as recognizing group members, tracking their social status and inferring relationships among them. An individual's place in the social order can be learned through direct interactions with others, but conflicts can be time-consuming and even injurious. Because the number of possible pairwise interactions increases rapidly with group size, members of large social groups will benefit if they can make judgments about relationships on the basis of indirect evidence. Transitive reasoning should therefore be particularly important for social individuals, allowing assessment of relationships from observations of interactions among others. Although a variety of studies have suggested that transitive inference may be used in social settings, the phenomenon has not been demonstrated under controlled conditions in animals. Here we show that highly social pinyon jays (Gymnorhinus cyanocephalus) draw sophisticated inferences about their own dominance status relative to that of strangers that they have observed interacting with known individuals. These results directly demonstrate that animals use transitive inference in social settings and imply that such cognitive capabilities are widespread among social species. |
Address |
Center for Avian Cognition, School of Biological Sciences, University of Nebraska, Lincoln, Nebraska 68588, USA |
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English |
Summary Language |
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Original Title |
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Series Editor |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1476-4687 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:15306809 |
Approved |
no |
Call Number |
refbase @ user @; Equine Behaviour @ team @ room B 3.029 |
Serial |
352 |
Permanent link to this record |
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Author |
Overdorff, D.J.; Erhart, E.M.; Mutschler, T. |
Title |
Does female dominance facilitate feeding priority in black-and-white ruffed lemurs (Varecia variegata) in southeastern Madagascar? |
Type |
Journal Article |
Year |
2005 |
Publication |
American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
Volume |
66 |
Issue |
1 |
Pages |
7-22 |
Keywords |
Agonistic Behavior; Animals; Eating/physiology; Feeding Behavior/*physiology; Female; Leadership; Lemuridae/*physiology; Madagascar; Male; Observation; Sex Factors; *Social Dominance |
Abstract |
Although many Malagasy lemurs are thought to be female dominant and to have female feeding priority, to date the relationship between these behaviors has been rigorously established only in Lemur catta, and other ways that females might achieve feeding priority have not been examined closely. Erhart and Overdorff [International Journal of Primatology 20:927-940, 1999] suggested that one way female primates achieve feeding priority is to initiate and lead groups to food, thereby gaining access to the food first and positively influencing their food intake compared to other group members. Here we describe female dominance patterns and potential measures of feeding priority in two groups of black-and-white ruffed lemurs (Varecia variegata) that were observed over a 15-month period in southeastern Madagascar. We predicted that the females would 1) be consistently dominant to males, 2) lead groups to food sources more often than males, and 3) have higher feeding rates compared to males when they arrived at food sources first. The results were dissimilar between the study groups. During the study, the oldest adult female in group 1 died. There was no evidence for female dominance in this group, and the remaining (likely natal) female did not lead the group more often, nor did she have a higher food intake than males. Group 1 dispersed shortly after the time frame reported here. In contrast, the resident female in group 2 was dominant to group males (based on agonistic interactions), led the group to food sources more often, and experienced a higher food intake when she arrived first at a food source. How these patterns vary over time and are influenced by the number of females in groups, group stability, food quality, and reproductive condition will be examined in future analyses. |
Address |
Department of Anthropology, University of Texas, Austin, Texas 78712-1086, USA. overdorff@mail.utexas.edu |
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English |
Summary Language |
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Original Title |
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Series Editor |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0275-2565 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:15898069 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
4110 |
Permanent link to this record |
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Author |
Noë, R.; de Waal, F.B.; van Hooff, J.A. |
Title |
Types of dominance in a chimpanzee colony |
Type |
Journal Article |
Year |
1980 |
Publication |
Folia primatologica; international journal of primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
Volume |
34 |
Issue |
1-2 |
Pages |
90-110 |
Keywords |
Agonistic Behavior; Animals; Animals, Zoo; *Behavior, Animal; Competitive Behavior; Factor Analysis, Statistical; Female; Hierarchy, Social; Male; *Pan troglodytes; *Social Dominance |
Abstract |
This study examines to what extent the concept of dominance can be used to describe the social structure of a group of semi-free-living chimpanzees. 15 behavioural variables, based on agonistic, competitive and affinitive behaviour patterns, have been compared with respect to the interindividual directions in which they occurred. In this analysis use was made of indices that reflect the position an individual occupies in the relationship structure. These indices were calculated per individual for all variables and subjected to factor analysis and cluster analysis. As a result, 13 of the variables could be grouped in three categories which have been labelled: (1) agonistic dominance; (2) bluff dominance, and (3) competitive dominance. Whereas the top positions in the hierarchies based on the first two closely related types of dominance were occupied by the adult males, the hierarchy based on the third type was headed by several adult females. |
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English |
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Original Title |
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Series Editor |
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Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0015-5713 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:7439873 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
212 |
Permanent link to this record |
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Author |
Mitman, G. |
Title |
Dominance, leadership, and aggression: animal behavior studies during the Second World War |
Type |
Journal Article |
Year |
1990 |
Publication |
Journal of the History of the Behavioral Sciences |
Abbreviated Journal |
J Hist Behav Sci |
Volume |
26 |
Issue |
1 |
Pages |
3-16 |
Keywords |
*Aggression; Animals; Behavior, Animal; *Dominance-Subordination; History, 20th Century; *Leadership; Political Systems; *Social Dominance; United States |
Abstract |
During the decade surrounding the Second World War, an extensive literature on the biological and psychological basis of aggression surfaced in America, a literature that in general emphasized the significance of learning and environment in the origins of aggressive behavior. Focusing on the animal behavior research of Warder Clyde Allee and John Paul Scott, this paper examines the complex interplay among conceptual, institutional, and societal forces that created and shaped a discourse on the subjects of aggression, dominance, and leadership within the context of World War II. The distinctions made between sexual and social dominance during this period, distinctions accentuated by the threat of totalitarianism abroad, and the varying ways that interpretations of behavior could be negotiated attests to the multiplicity of interactions that influence the development of scientific research. |
Address |
University of Wisconsin |
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English |
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Series Issue |
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Edition |
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ISSN |
0022-5061 |
ISBN |
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Medium |
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Area |
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Conference |
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Notes |
PMID:2405050 |
Approved |
no |
Call Number |
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Serial |
2044 |
Permanent link to this record |
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Author |
Mader, D.R.; Price, E.O. |
Title |
Discrimination learning in horses: effects of breed, age and social dominance |
Type |
Journal Article |
Year |
1980 |
Publication |
Journal of animal science |
Abbreviated Journal |
J. Anim Sci. |
Volume |
50 |
Issue |
5 |
Pages |
962-965 |
Keywords |
Aging; Animals; *Discrimination Learning; Female; Horses/*physiology; *Social Dominance |
Abstract |
The discrimination learning ability of Quarter Horses and Thoroughbreds was compared by means of visual cues in a three-choice test with food as a reward. Quarter Horses learned significantly faster than Thoroughbreds, and learning progressed more rapidly for both breeds in a second discrimination task. Significant negative correlations were observed between age and rate of learning. Quarter Horses tended to be less reactive than Thoroughbreds, but individual emotional reactivity ratings and learning scores were not correlated. No correlation was found between social dominance and learning scores. Learning studies with horses may provide a better understanding of the behavioral traits that influence trainability in this species. |
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English |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0021-8812 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
PMID:7390949 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
679 |
Permanent link to this record |
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Author |
Li, F.-H.; Zhong, W.-Q.; Wang, Z.; Wang, D.-H. |
Title |
Rank in a food competition test and humoral immune functions in male Brandt's voles (Lasiopodomys brandtii) |
Type |
Journal Article |
Year |
2007 |
Publication |
Physiology & behavior |
Abbreviated Journal |
Physiol. Behav. |
Volume |
90 |
Issue |
2-3 |
Pages |
490-495 |
Keywords |
Animals; Antibody Formation/*physiology; Arvicolinae/immunology/*physiology; Competitive Behavior/*physiology; *Dominance-Subordination; Feeding Behavior/physiology; Hydrocortisone/blood; Male; *Social Dominance; Spleen/immunology/physiology |
Abstract |
Social status can influence an animal's immune and reproductive functions, eventually leading to alterations in immunocompetence and reproductive success. Here, we report that rank assessed in a food competition test, considered as an index of social status, has significant influences on humoral immune functions in male Brandt's voles (Lasiopodomys brandtii) living in a group. Our data reveal a negative correlation of the spleen mass and serum antibody levels with social status, as well as a positive correlation of serum cortisol levels with social status. Males winning in food competition had a smaller spleen, a lower level of serum antibodies, and a higher level of serum cortisol than did their conspecific counterparts. These data indicate interactions between social status and humoral immune functions and might illustrate a trade-off between infection risks and reproductive success in male Brandt's voles. |
Address |
State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, The Chinese Academy of Sciences, No. 25 Beisihuan Xilu, Zhongguancun, Haidian, Beijing 100080, China |
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English |
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Series Issue |
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Edition |
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ISSN |
0031-9384 |
ISBN |
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Expedition |
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Conference |
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Notes |
PMID:17141282 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
804 |
Permanent link to this record |