Records |
Author |
de Waal, F.B.M. |
Title |
A century of getting to know the chimpanzee |
Type |
Journal Article |
Year |
2005 |
Publication |
Nature |
Abbreviated Journal |
Nature |
Volume |
437 |
Issue |
7055 |
Pages |
56-59 |
Keywords |
Aggression; Animals; Behavior, Animal/*physiology; Competitive Behavior; Cooperative Behavior; Female; Humans; Male; Pan troglodytes/genetics/*physiology/psychology; Sexual Behavior, Animal; *Social Behavior |
Abstract |
A century of research on chimpanzees, both in their natural habitat and in captivity, has brought these apes socially, emotionally and mentally much closer to us. Parallels and homologues between chimpanzee and human behaviour range from tool-technology and cultural learning to power politics and intercommunity warfare. Few behavioural domains have remained untouched by this increased knowledge, which has dramatically challenged the way we view ourselves. The sequencing of the chimpanzee genome will no doubt bring more surprises and insights. Humans do occupy a special place among the primates, but this place increasingly has to be defined against a backdrop of substantial similarity. |
Address |
Living Links, Yerkes National Primate Research Center, Emory University, 954 North Gatewood Road, Atlanta, Georgia 30322, USA. dewaal@emory.edu |
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ISSN |
1476-4687 |
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Notes |
PMID:16136128 |
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no |
Call Number |
refbase @ user @ |
Serial |
162 |
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Author |
Dzieweczynski, T.L.; Eklund, A.C.; Rowland, W.J. |
Title |
Male 11-ketotestosterone levels change as a result of being watched in Siamese fighting fish, Betta splendens |
Type |
Journal Article |
Year |
2006 |
Publication |
General and comparative endocrinology |
Abbreviated Journal |
Gen Comp Endocrinol |
Volume |
147 |
Issue |
2 |
Pages |
184-189 |
Keywords |
Aggression; Animals; Female; Fishes/*blood; Male; Nesting Behavior; *Social Behavior; Social Environment; Testosterone/*analogs & derivatives/blood |
Abstract |
This study investigated the effects of nesting status and the presence of an audience on 11-ketotestosterone (11KT) levels in male Siamese fighting fish, Betta splendens. Prior studies have demonstrated that both nesting status, an indicator of territory-holding power and reproductive state, and the sex of a conspecific audience lead to differences in male behavior during aggressive encounters. Since behavioral changes have already been demonstrated, we chose to investigate whether 11KT levels were also influenced by nesting status and audience presence as 11KT both stimulates, and is stimulated by, reproductive and aggressive behaviors in male teleosts. Male 11KT levels were measured from water samples taken from containers holding fish both before and after interaction. Males interacted under three treatment conditions: no audience, female audience, and male audience. Within these treatments were two nest paradigms: both males had nests or neither male had a nest. 11KT levels varied depending on nesting status and audience type. In general, 11KT levels were lower in interacting males when a female audience was present or when males had nests. Overall, 11KT showed increases or decreases as aggression increased or decreased, as shown by already established behavioral findings [see Dzieweczynski T.L., Green T.M., Earley R.L., Rowland W.J., 2005. Audience effect is context dependent in Siamese fighting fish, Betta splendens. Behav. Ecol. 16, 1025-1030; Doutrelant, C., McGregor, P.K., Oliveira, R.F., 2001. Effect of an audience on intrasexual communication in male Siamese fighting fish (Betta splendens). Behav. Ecol. 12, 283-286.]. Our results suggest that 11KT levels are influenced by reproductive status, as indicated by nest ownership, and audience presence and are most likely modulated by territorial behavior and social environment. |
Address |
Department of Psychology, University of New England, Biddeford, ME 04005, USA. tdzieweczynski@une.edu |
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ISSN |
0016-6480 |
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PMID:16473353 |
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no |
Call Number |
refbase @ user @ |
Serial |
502 |
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Author |
Heitor, F.; do Mar Oom, M.; Vicente, L. |
Title |
Social relationships in a herd of Sorraia horses Part I. Correlates of social dominance and contexts of aggression |
Type |
Journal Article |
Year |
2006 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
Volume |
73 |
Issue |
2 |
Pages |
170-177 |
Keywords |
Age Factors; *Aggression; Animals; Female; *Hierarchy, Social; Horses/*psychology; Male; Sex Factors; *Social Dominance; *Social Environment; Statistics, Nonparametric |
Abstract |
Factors related to dominance rank and the functions of aggression were studied in a herd of Sorraia horses, Equus caballus, under extensive management. Subjects were 10 adult mares 5-18 years old and a stallion introduced into the group for breeding. Dominance relationships among mares were clear, irrespective of rank difference, and remained stable after introduction of the stallion. The dominance hierarchy was significantly linear and rank was positively correlated with age and total aggressiveness. Higher-ranking mares received lower frequency and intensity of agonistic interactions. Nevertheless, higher-ranking dominants were not more likely to elicit submission from their subordinates than lower-ranking dominants. Neither close-ranking mares nor mares with less clear dominance relationships were more aggressive towards each other. Agonistic interactions seemed to be used more importantly in regulation of space than to obtain access to food or to reassert dominance relationships. Contexts of aggression were related to mare rank. The results suggest that dominance relationships based on age as a conventional criterion were established to reduce aggressiveness in a herd where the costs of aggression are likely to outweigh the benefits. |
Address |
Centro de Biologia Ambiental, Faculdade de Ciencias da Universidade de Lisboa, Campo Grande, Edificio C2, 1749-016 Lisboa, Portugal |
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ISSN |
0376-6357 |
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Notes |
PMID:16815645 |
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no |
Call Number |
refbase @ user @ |
Serial |
292 |
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Author |
Houpt, K.A. |
Title |
Why horse behaviour is important to the equine clinician |
Type |
Journal Article |
Year |
2006 |
Publication |
Equine veterinary journal |
Abbreviated Journal |
Equine Vet J |
Volume |
38 |
Issue |
5 |
Pages |
386-387 |
Keywords |
Accidents, Occupational/prevention & control; Aggression; Animals; *Behavior, Animal/physiology; Clinical Competence; Fear; Horses/*physiology; Humans; Veterinarians/psychology; Veterinary Medicine/*standards |
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Address |
Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853-6401, USA |
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ISSN |
0425-1644 |
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Notes |
PMID:16986596 |
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no |
Call Number |
refbase @ user @ |
Serial |
30 |
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Author |
Giles, N.; Tupper, J. |
Title |
Equine interspecies aggression |
Type |
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Year |
2006 |
Publication |
The Veterinary record |
Abbreviated Journal |
Vet. Rec. |
Volume |
159 |
Issue |
22 |
Pages |
756 |
Keywords |
Aggression/*physiology; Animals; Horses/*physiology; Sheep/*physiology; Social Dominance |
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ISSN |
0042-4900 |
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Notes |
PMID:17127768 |
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no |
Call Number |
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Serial |
1779 |
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Author |
Macholc, E.J.A. |
Title |
Equine interspecies aggression |
Type |
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Year |
2006 |
Publication |
The Veterinary record |
Abbreviated Journal |
Vet. Rec. |
Volume |
159 |
Issue |
24 |
Pages |
824 |
Keywords |
*Aggression; Animals; *Behavior, Animal; Chickens; Ducks; *Horses; Species Specificity |
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0042-4900 |
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Notes |
PMID:17158722 |
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no |
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Serial |
1778 |
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Author |
Burden, F.; Trawford, A. |
Title |
Equine interspecies aggression Comment on |
Type |
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Year |
2006 |
Publication |
The Veterinary record |
Abbreviated Journal |
Vet. Rec. |
Volume |
159 |
Issue |
25 |
Pages |
859-860 |
Keywords |
*Aggression; Animals; *Behavior, Animal; Cats; Dogs; Equidae |
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ISSN |
0042-4900 |
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Notes |
PMID:17172484 |
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no |
Call Number |
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Serial |
1777 |
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Author |
Huxley, J. |
Title |
Equine interspecies aggression |
Type |
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Year |
2006 |
Publication |
The Veterinary record |
Abbreviated Journal |
Vet. Rec. |
Volume |
159 |
Issue |
25 |
Pages |
860 |
Keywords |
*Aggression; Animals; *Behavior, Animal; Horses; Male; Sheep |
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0042-4900 |
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PMID:17172489 |
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no |
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Serial |
1776 |
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Author |
Schmidt, R.; Amrhein, V.; Kunc, H.P.; Naguib, M. |
Title |
The day after: effects of vocal interactions on territory defence in nightingales |
Type |
Journal Article |
Year |
2007 |
Publication |
The Journal of Animal Ecology |
Abbreviated Journal |
T. J. Anim. Ecol. |
Volume |
76 |
Issue |
1 |
Pages |
168-173 |
Keywords |
Aggression; Animals; Male; Songbirds/*physiology; *Territoriality; Time Factors; Vocalization, Animal/*physiology |
Abstract |
1. Models on territory acquisition and tenure predict that territorial animals benefit by adjusting territorial defence behaviour to previous challenges they had experienced within the socially complex environment of communication networks. 2. Here, we addressed such issues of social cognition by investigating persisting effects of vocal contests on territory defence behaviour in nightingales Luscinia megarhynchos (Brehm). 3. Using interactive playback during nocturnal song of subjects, a rival was simulated to countersing either aggressively (by song overlapping) or moderately (by song alternating) from outside the subjects' territory. Thereby, the time-specific singing strategy provided an experimentally controlled source of information on the motivation of an unfamiliar rival. 4. Expecting that nightingales integrate information with time, the same rival was simulated to return as a moderately singing intruder on the following morning. 5. The results show that the vigour with which male nightingales responded to the simulated intrusion of an opponent during the day depended on the nature of the nocturnal vocal interaction experienced several hours before. 6. Males that had received the song overlapping playback the preceding night approached the simulated intruder more quickly and closer and sang more songs near the loudspeaker than did males that had received a song alternating playback. 7. This adjustment of territory defence strategies depending on information from prior signalling experience suggests that integrating information with time plays an important part in territory defence by affecting a male's decision making in a communication network. |
Address |
Department of Animal Behaviour, Bielefeld University, PO Box 100 131, D-33501 Bielefeld, Germany. rouven.schmidt@uni-bielefeld.de |
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ISSN |
0021-8790 |
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Notes |
PMID:17184365 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2749 |
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Author |
Grosenick, L.; Clement, T.S.; Fernald, R.D. |
Title |
Fish can infer social rank by observation alone |
Type |
Journal Article |
Year |
2007 |
Publication |
Nature |
Abbreviated Journal |
Nature |
Volume |
445 |
Issue |
7126 |
Pages |
429-432 |
Keywords |
Aggression/physiology; Animals; Cognition/*physiology; Female; Fishes/*physiology; Learning/*physiology; Male; Models, Biological; *Social Dominance; Territoriality |
Abstract |
Transitive inference (TI) involves using known relationships to deduce unknown ones (for example, using A > B and B > C to infer A > C), and is thus essential to logical reasoning. First described as a developmental milestone in children, TI has since been reported in nonhuman primates, rats and birds. Still, how animals acquire and represent transitive relationships and why such abilities might have evolved remain open problems. Here we show that male fish (Astatotilapia burtoni) can successfully make inferences on a hierarchy implied by pairwise fights between rival males. These fish learned the implied hierarchy vicariously (as 'bystanders'), by watching fights between rivals arranged around them in separate tank units. Our findings show that fish use TI when trained on socially relevant stimuli, and that they can make such inferences by using indirect information alone. Further, these bystanders seem to have both spatial and featural representations related to rival abilities, which they can use to make correct inferences depending on what kind of information is available to them. Beyond extending TI to fish and experimentally demonstrating indirect TI learning in animals, these results indicate that a universal mechanism underlying TI is unlikely. Rather, animals probably use multiple domain-specific representations adapted to different social and ecological pressures that they encounter during the course of their natural lives. |
Address |
Department of Biological Sciences, Stanford University, Stanford, California, 94305, USA. logang@stanford.edu |
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ISSN |
1476-4687 |
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Notes |
PMID:17251980 |
Approved |
no |
Call Number |
refbase @ user @ |
Serial |
600 |
Permanent link to this record |