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| Author | Evans, T.A.; Westergaard, G.C. | ||||
| Title | Discrimination of functionally appropriate and inappropriate throwing tools by captive tufted capuchins (Cebus apella) | Type | Journal Article | ||
| Year | 2004 | Publication | Animal Cognition | Abbreviated Journal | Anim. Cogn. |
| Volume | 7 | Issue | 4 | Pages | 255-262 |
| Keywords | Animals; Appetitive Behavior; Cebus/*psychology; Choice Behavior; *Concept Formation; *Discrimination Learning; Female; Male; *Problem Solving; *Psychomotor Performance; Recognition (Psychology) | ||||
Abstract  |
A tool-throwing task was used to test whether capuchin monkeys understand the difference between functionally appropriate and functionally inappropriate tools. A group of monkeys was trained to obtain a sticky treat from a container outside their enclosure using a projectile attached to one end of an anchored line. Subsequently, these monkeys were given choice tests between functional and nonfunctional versions of tools used in training. A different feature of the tool was varied between alternatives in each choice test. The monkeys chose to use functional tools significantly more often than nonfunctional tools in early exposures to each choice test. A second experiment tested whether these subjects, as well as a second group of minimally trained participants, could distinguish between functional and nonfunctional tools that appeared different from those used in training. A new set of design features was varied between tools in these choice tests. All participants continued to choose functional tools significantly more often than nonfunctional tools, regardless of their tool-throwing experience or the novel appearance of the tools. These results suggest that capuchin monkeys, like chimpanzees studied in similar experiments, are sensitive to a variety of functionally relevant tool features. | ||||
| Address | Alpha Genesis Inc., 95 Castle Hall Road, P.O. Box 557, Yemassee, SC 29945, USA. teprimate@islc.net | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 1435-9448 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:15138849 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 2523 | ||
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| Author | Scheibe, K.M.; Gromann, C. | ||||
| Title | Application testing of a new three-dimensional acceleration measuring system with wireless data transfer (WAS) for behavior analysis | Type | |||
| Year | 2006 | Publication | Behavior research methods | Abbreviated Journal | Behav Res Methods |
| Volume | 38 | Issue | 3 | Pages | 427-433 |
| Keywords | Acceleration; Animals; *Behavior, Animal; Cattle; Cattle Diseases/*diagnosis; Computer Communication Networks/*instrumentation; Forelimb/physiopathology; Fractals; Hindlimb/physiopathology; Horse Diseases/*diagnosis; Horses; Imaging, Three-Dimensional/instrumentation/methods/veterinary; Lameness, Animal/*diagnosis; Monitoring, Ambulatory/instrumentation/*methods; Motor Activity; Movement; Pattern Recognition, Automated/methods | ||||
| Abstract |
A wireless acceleration measurement system was applied to free-moving cows and horses. Sensors were available as a collar and a flat box for measuring leg or trunk movements. Results were transmitted simultaneously by radio or stored in an 8-MB internal memory. As analytical procedures, frequency distributions with standard deviations, spectral analyses, and fractal analyses were applied. Bymeans of the collar sensor, basic behavior patterns (standing, grazing, walking, ruminating, drinking, and hay uptake) could be identified in cows. Lameness could be detected in cows and horses by means of the leg sensor. The portion of basic and harmonic spectral components was reduced; the fractal dimension was reduced. The system can be used for the detection and analysis of even small movements of free-moving humans or animals over several hours. It is convenient for the analysis of basic behaviors, emotional reactions, or events causing flight or fright or for comparing different housing elements, such as floors or fences. | ||||
| Address | Institute for Zoo and Wildlife Research, Berlin, Germany. kscheibe@izw-berlin.de | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1554-351X | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:17186752 | Approved | no | ||
| Call Number | Serial | 1775 | |||
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| Author | Horowitz, A.C. | ||||
| Title | Do humans ape? Or do apes human? Imitation and intention in humans (Homo sapiens) and other animals | Type | Journal Article | ||
| Year | 2003 | Publication | Journal of comparative psychology | Abbreviated Journal | J Comp Psychol |
| Volume | 117 | Issue | 3 | Pages | 325-336 |
| Keywords | Adolescent; Adult; Animals; *Appetitive Behavior; Attention; Child, Preschool; Concept Formation; Female; Humans; *Imitative Behavior; Male; Motivation; Pan troglodytes/*psychology; *Problem Solving; *Psychomotor Performance; Reaction Time; Species Specificity | ||||
| Abstract |
A. Whiten, D. M. Custance, J.-C. Gomez, P. Teixidor, and K. A. Bard (1996) tested chimpanzees' (Pan troglodytes) and human children's (Homo sapiens) skills at imitation with a 2-action test on an “artificial fruit.” Chimpanzees imitated to a restricted degree; children were more thoroughly imitative. Such results prompted some to assert that the difference in imitation indicates a difference in the subjects' understanding of the intentions of the demonstrator (M. Tomasello, 1996). In this experiment, 37 adult human subjects were tested with the artificial fruit. Far from being perfect imitators, the adults were less imitative than the children. These results cast doubt on the inference from imitative performance to an ability to understand others' intentions. The results also demonstrate how any test of imitation requires a control group and attention to the level of behavioral analysis. | ||||
| Address | Department of Cognitive Science, University of California, San Diego, CA, USA. ahorowitz@crl.ucsd.edu | ||||
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| Publisher | Place of Publication | Washington, D.C. : 1983 | Editor | ||
| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0735-7036 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:14498809 | Approved | yes | ||
| Call Number | refbase @ user @ | Serial | 736 | ||
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| Author | Churcher, C. S. | ||||
| Title | Oldest Ass Recovered from Olduvai Gorge, Tanzania, and the Origin of Asses | Type | Journal Article | ||
| Year | 1982 | Publication | Journal of Paleontology | Abbreviated Journal | J. Paleontol. |
| Volume | 56 | Issue | 5 | Pages | 1124-1132 |
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| Abstract |
Abstract An isolated right metatarsal III from an adult small monodactyl equid was recovered in situ from the middle of Bed II at Evelyn Fuchs-Hans Reck Korongo, Olduvai Gorge, Tanzania in 1963. Interosseous contacts for splint metatarsals II and IV are less evident than in any modern comparative Equus metapodials in Leiden, Holland, London, England or in the field in Africa: horses (E. caballus), zebras (E. burchellii, E. grevyi, E. quagga) and asses (E. a. asinus, E. a. africanus), of which the horses and asses were domesticates. The specimen is provisionally assigned to Equus (Asinus) asinus. The estimated height at the shoulders is less than a meter for the animal in life, comparable to a small donkey. |
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 105 | ||
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| Author | Pérez-Barbería, F.J.; Shultz, S.; Dunbar, R.I.M.; Janis, C. | ||||
| Title | Evidence For Coevolution Of Sociality And Relative Brain Size In Three Orders Of Mammals | Type | Journal Article | ||
| Year | 2007 | Publication | Evolution | Abbreviated Journal | |
| Volume | 61 | Issue | 12 | Pages | 2811-2821 |
| Keywords | Brain size, carnivores, coevolution, primates, sociality, ungulates | ||||
| Abstract |
Abstract As the brain is responsible for managing an individual's behavioral response to its environment, we should expect that large relative brain size is an evolutionary response to cognitively challenging behaviors. The “social brain hypothesis†argues that maintaining group cohesion is cognitively demanding as individuals living in groups need to be able to resolve conflicts that impact on their ability to meet resource requirements. If sociality does impose cognitive demands, we expect changes in relative brain size and sociality to be coupled over evolutionary time. In this study, we analyze data on sociality and relative brain size for 206 species of ungulates, carnivores, and primates and provide, for the first time, evidence that changes in sociality and relative brain size are closely correlated over evolutionary time for all three mammalian orders. This suggests a process of coevolution and provides support for the social brain theory. However, differences between taxonomic orders in the stability of the transition between small-brained/nonsocial and large-brained/social imply that, although sociality is cognitively demanding, sociality and relative brain size can become decoupled in some cases. Carnivores seem to have been especially prone to this. |
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| Notes | doi: 10.1111/j.1558-5646.2007.00229.x | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4781 | ||
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| Author | Roth II,T.C.; Cox, J.G.; Lima, S.L. | ||||
| Title | The Use and Transfer of Information About Predation Risk in Flocks of Wintering Finches | Type | Journal Article | ||
| Year | 2008 | Publication | Ethology | Abbreviated Journal | Ethology |
| Volume | 114 | Issue | 12 | Pages | 1218 - 1226 |
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| Abstract |
ABSTRACT Several studies in behavior have focused in some way on how groups of prey gather and use information about predation risk. Although asymmetries in information about risk exist among members of real groups, we know little about how such uneven information might affect individual or group antipredator decisions. Hence, we studied the use and transfer of information about the risk of predation in small flocks of wintering birds. House finches (Carpodacus mexicanus; 28 groups of three) were held in large enclosures divided into safe and risky patches. We controlled the information about risk available to each individual by conducting attacks with a model hawk that was visible to only a single (informed) bird. Repeated attacks on a single individual did not reduce the amount of feeding by other birds in that patch, although the time to resume feeding after observing a response to an attack event was somewhat longer than after a no attack event. These results suggest that informed individuals impart some information to naive (uninformed) birds, but this effect was not strong. In fact, the frequent return of informed individuals to feeders after observing uninformed individuals feed suggests that finches relied more on public information regarding safety than their own personal information in deciding when to feed. Group patch choice appeared to be based on a majority-rules decision, although an effect of dominance status was apparent. Our results suggest that subordinate flock members may exert a large influence over group decision-making by acting as spatial 'anchors'. |
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 4704 | ||
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| Author | Noë, R.; van Schaik, C.P.; van Hooff, J.A.R.A.M. | ||||
| Title | The Market Effect: an Explanation for Pay-off Asymmetries among Collaborating Animals | Type | Journal Article | ||
| Year | 1991 | Publication | Ethology | Abbreviated Journal | Ethology |
| Volume | 87 | Issue | 1-2 | Pages | 97-118 |
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| Abstract |
Abstract * 1Animals can derive leverage over others from (a) resource holding power, based for instance on fighting ability or dominance, and (b) the possession of commodities, such as special skills and resources that cannot be taken away by force. * 2We contend that power based on the possession of commodities strongly depends on the level of supply and demand for that commodity, a phenomenon we call the ‘market effect’. * 3Several theoretical and empirical examples are given of social systems in which animals belong to two distinct classes that offer two different kinds of commodities. * 4The relative frequency of occurrence of the two classes is shown to determine the relative power of their members. * 5We consider the theoretical properties of bargaining processes by which relative power is converted into corresponding pay-off distributions. * 6We propose coalition games, a class of games with more than two players and in which bargaining is possible, as suitable paradigms for collaboration among members of social units. | ||||
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| Publisher | Blackwell Publishing Ltd | Place of Publication | Editor | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1439-0310 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5413 | ||
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| Author | Collier, T.C.; Blumstein, D.T.; Girod, L.; Taylor, C.E. | ||||
| Title | Is Alarm Calling Risky? Marmots Avoid Calling from Risky Places | Type | Journal Article | ||
| Year | 2010 | Publication | Ethology | Abbreviated Journal | Ethology |
| Volume | Issue | Pages | no-no | ||
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| Abstract |
Abstract Alarm calling is common in many species. A prevalent assumption is that calling puts the vocalizing individual at increased risk of predation. If calling is indeed costly, we need special explanations for its evolution and maintenance. In some, but not all species, callers vocalize away from safety and thus may be exposed to an increased risk of predation. However, for species that emit bouts with one or a few calls, it is often difficult to identify the caller and find the precise location where a call was produced. We analyzed the spatial dynamics of yellow-bellied marmot (Marmota flaviventris) alarm calling using an acoustic localization system to determine the location from where calls were emitted. Marmots almost always called from positions close to the safety of their burrows, and, if they produced more than one alarm call, tended to end their calling bouts closer to safety than they started them. These results suggest that for this species, potential increased predation risk from alarm calling is greatly mitigated and indeed calling may have limited predation costs. | ||||
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| Publisher | Blackwell Publishing Ltd | Place of Publication | Editor | ||
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| ISSN | 1439-0310 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5181 | ||
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| Author | Aurich, J.; Wulf, M.; Ille, N.; Erber, R.; von Lewinski, M.; Palme, R.; Aurich, C. | ||||
| Title | Effects of season, age, sex and housing on salivary cortisol concentrations in horses | Type | Journal Article | ||
| Year | 2015 | Publication | Domestic Animal Endocrinology | Abbreviated Journal | Domest. Anim. Endocrinol. |
| Volume | Issue | Pages | |||
| Keywords | horse; cortisol; diurnal rhythm; reproduction; housing | ||||
| Abstract |
Abstract Analysis of salivary cortisol is increasingly used to assess stress responses in horses. Since spontaneous or experimentally induced increases in cortisol concentrations are often relatively small for stress studies proper controls are needed. This requires an understanding of factors affecting salivary cortisol over longer times. In this study, we have analysed salivary cortisol concentration over 6 mo in horses (n = 94) differing in age, sex, reproductive state and housing. Salivary cortisol followed a diurnal rhythm with highest concentrations in the morning and a decrease throughout the day (P < 0.001). This rhythm was disrupted in individual groups on individual days; however, alterations remained within the range of diurnal changes. Comparison between months showed highest cortisol concentrations in December (P < 0.001). Cortisol concentrations increased in breeding stallions during the breeding season (P < 0.001). No differences in salivary cortisol concentrations between non-pregnant mares with and without a corpus luteum existed. In stallions, mean daily salivary cortisol and plasma testosterone concentration were weakly correlated (r = 0.251, P < 0.01). No differences in salivary cortisol between female and male young horses and no consistent differences between horses of different age existed. Group housing and individual stabling did not affect salivary cortisol. In conclusion, salivary cortisol concentrations in horses follow a diurnal rhythm and are increased in active breeding sires. Time of the day and reproductive state of the horses are thus important for experiments that include analysis of cortisol in saliva. | ||||
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| ISSN | 0739-7240 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5847 | ||
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| Author | Bamford, A.J.; Monadjem, A.; Hardy, I.C.W. | ||||
| Title | Associations of Avian Facial Flushing and Skin Colouration with Agonistic Interaction Outcomes | Type | Journal Article | ||
| Year | 2010 | Publication | Ethology | Abbreviated Journal | Ethology |
| Volume | Issue | Pages | no-no | ||
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| Abstract |
Abstract Facial flushing, a colour change caused by variation of blood flow through highly vascularized skin, has been observed in taxonomically diverse bird species but the function of the behaviour has not been assessed. Lappet-faced vultures, Aegypius tracheliotos, have unfeathered heads that can rapidly flush from pink to dark red, and this has been hypothesized to indicate contest ability in vulture gatherings. We show that adults with flushed heads won most interactions against those with pale heads. A previously unnoticed colour variation of the throat, visible only when the head is flushed, was also related to the outcome of interactions: blue-throated adults participated in, and won, more interactions than red-throated adults. We suggest that the non-fixed groups of which lappet-faced vulture populations consist promote the evolution of signals of dominance that can be adjusted extremely rapidly. | ||||
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| Publisher | Blackwell Publishing Ltd | Place of Publication | Editor | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1439-0310 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5180 | ||
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