| Home | [21–30] << 31 32 33 34 35 36 37 38 39 40 >> [41–50] |
|
| Records | |||||
|---|---|---|---|---|---|
| Author | Brosnan, S.F.; de Waal, F.B.M. | ||||
| Title | A concept of value during experimental exchange in brown capuchin monkeys, Cebus apella | Type | Journal Article | ||
| Year | 2004 | Publication | Folia primatologica; international journal of primatology | Abbreviated Journal | Folia Primatol (Basel) |
| Volume | 75 | Issue | 5 | Pages | 317-330 |
| Keywords | Animals; Cebus/*psychology; *Choice Behavior; Female; Food Preferences; *Learning; Male; Sex Factors; Statistics, Nonparametric; *Token Economy; Video Recording | ||||
| Abstract | We evaluated the response of brown capuchin monkeys to two differentially valued tokens in an experimental exchange situation akin to a simple barter. Monkeys were given a series of three tests to evaluate their ability to associate tokens with food, then their responses were examined in a barter situation in which tokens were either limited or unlimited. Capuchins did not perform barter in the typical sense, returning the tokens which were associated with the reward. However, females, but not males, showed a different response, preferring the higher-value token. This may indicate that they learned to prefer one token over the other rather than to associate the tokens with their specific rewards. This sex difference parallels previous findings of greater reciprocity in female brown capuchins than in males. | ||||
Address  |
Living Links Center, Emory University, Yerkes National Primate Research Center, 954 N. Gatewood Drive, Atlanta, GA 30329, USA. sbrosna@emory.edu | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0015-5713 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:15486443 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 170 | ||
| Permanent link to this record | |||||
| Author | de Waal, F.B.M.; Dindo, M.; Freeman, C.A.; Hall, M.J. | ||||
| Title | The monkey in the mirror: hardly a stranger | Type | Journal Article | ||
| Year | 2005 | Publication | Proceedings of the National Academy of Sciences of the United States of America | Abbreviated Journal | Proc. Natl. Acad. Sci. U.S.A. |
| Volume | 102 | Issue | 32 | Pages | 11140-11147 |
| Keywords | Analysis of Variance; Animals; Cebus/*physiology; *Discrimination (Psychology); Empathy; Female; Male; Observation; *Recognition (Psychology); *Self Concept; Sex Factors | ||||
| Abstract | It is widely assumed that monkeys see a stranger in the mirror, whereas apes and humans recognize themselves. In this study, we question the former assumption by using a detailed comparison of how monkeys respond to mirrors versus live individuals. Eight adult female and six adult male brown capuchin monkeys (Cebus apella) were exposed twice to three conditions: (i) a familiar same-sex partner, (ii) an unfamiliar same-sex partner, and (iii) a mirror. Females showed more eye contact and friendly behavior and fewer signs of anxiety in front of a mirror than they did when exposed to an unfamiliar partner. Males showed greater ambiguity, but they too reacted differently to mirrors and strangers. Discrimination between conditions was immediate, and blind coders were able to tell the difference between monkeys under the three conditions. Capuchins thus seem to recognize their reflection in the mirror as special, and they may not confuse it with an actual conspecific. Possibly, they reach a level of self-other distinction intermediate between seeing their mirror image as other and recognizing it as self. | ||||
| Address |
Living Links Center, Emory University, Atlanta, GA 30322, USA. dewaal@emory.edu | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0027-8424 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:16055557 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 164 | ||
| Permanent link to this record | |||||
| Author | Milgram, N.W.; Head, E.; Muggenburg, B.; Holowachuk, D.; Murphey, H.; Estrada, J.; Ikeda-Douglas, C.J.; Zicker, S.C.; Cotman, C.W. | ||||
| Title | Landmark discrimination learning in the dog: effects of age, an antioxidant fortified food, and cognitive strategy | Type | Journal Article | ||
| Year | 2002 | Publication | Neuroscience and Biobehavioral Reviews | Abbreviated Journal | Neurosci Biobehav Rev |
| Volume | 26 | Issue | 6 | Pages | 679-695 |
| Keywords | Age Factors; Aging/*physiology; Analysis of Variance; Animals; Antioxidants/*pharmacology; Blood Chemical Analysis/methods; Cognition/*physiology; *Diet; Discrimination Learning/*drug effects/*physiology; Distance Perception/drug effects/physiology; Dogs/physiology; Female; Male; Psychomotor Performance/physiology; Retention (Psychology)/drug effects/physiology; Spatial Behavior/*drug effects/*physiology; Task Performance and Analysis; Time Factors; Vitamin E/blood | ||||
| Abstract | The landmark discrimination learning test can be used to assess the ability to utilize allocentric spatial information to locate targets. The present experiments examined the role of various factors on performance of a landmark discrimination learning task in beagle dogs. Experiments 1 and 2 looked at the effects of age and food composition. Experiments 3 and 4 were aimed at characterizing the cognitive strategies used in performance on this task and in long-term retention. Cognitively equivalent groups of old and young dogs were placed into either a test group maintained on food enriched with a broad-spectrum of antioxidants and mitochondrial cofactors, or a control group maintained on a complete and balanced food formulated for adult dogs. Following a wash-in period, the dogs were tested on a series of problems, in which reward was obtained when the animal responded selectively to the object closest to a thin wooden block, which served as a landmark. In Experiment 1, dogs were first trained to respond to a landmark placed directly on top of coaster, landmark 0 (L0). In the next phase of testing, the landmark was moved at successively greater distances (1, 4 or 10 cm) away from the reward object. Learning varied as a function of age group, food group, and task. The young dogs learned all of the tasks more quickly than the old dogs. The aged dogs on the enriched food learned L0 significantly more rapidly than aged dogs on control food. A higher proportion of dogs on the enriched food learned the task, when the distance was increased to 1cm. Experiment 2 showed that accuracy decreased with increased distance between the reward object and landmark, and this effect was greater in old animals. Experiment 3 showed stability of performance, despite using a novel landmark, and new locations, indicating that dogs learned the landmark concept. Experiment 4 found age impaired long-term retention of the landmark task. These results indicate that allocentric spatial learning is impaired in an age-dependent manner in dogs, and that age also affects performance when the distance between the landmark and target is increased. In addition, these results both support a role of oxidative damage in the development of age-associated cognitive dysfunction and indicate that short-term administration of a food enriched with supplemental antioxidants and mitochondrial cofactors can partially reverse the deleterious effects of aging on cognition. | ||||
| Address |
Life Science Division, University of Toronto at Scarborough, 1265 Military Trail, Scarborough, Ont., Canada M1C 1A4. milgram@psych.utoronto.ca | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0149-7634 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:12479842 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 2806 | ||
| Permanent link to this record | |||||
| Author | Watve, M.; Thakar, J.; Kale, A.; Puntambekar, S.; Shaikh, I.; Vaze, K.; Jog, M.; Paranjape, S. | ||||
| Title | Bee-eaters ( Merops orientalis) respond to what a predator can see | Type | Journal Article | ||
| Year | 2002 | Publication | Animal Cognition | Abbreviated Journal | Anim. Cogn. |
| Volume | 5 | Issue | 4 | Pages | 253-259 |
| Keywords | Animals; Birds/*physiology; *Predatory Behavior; *Visual Perception | ||||
| Abstract | Two sets of experiments are reported that show that the small green bee-eater ( Merops orientalis, a small tropical bird) can appreciate what a predator can or cannot see. Bee-eaters avoid entering the nest in the presence of a potential nest predator. In the first set of experiments bee-eaters entered the nest more frequently when the predator was unable to see the nest from its position, as compared to an approximately equidistant position from which the nest could be seen. In the second set of experiments bee-eaters entered the nest more frequently when the predator was looking away from the nest. The angle of gaze from the nest was associated significantly positively with the probability of entering the nest whereas the angle from the bird was not. Birds showed considerable flexibility as well as individual variation in the possible methods of judging the predator's position and direction of gaze. | ||||
| Address |
Life Research Foundation, 10, Pranav, 1000/6C Navi Peth, Pune 411030, India. watve@vsnl.com | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1435-9448 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:12461603 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 2587 | ||
| Permanent link to this record | |||||
| Author | Zeitler-Feicht, M. H.; Buschmann, S. | ||||
| Title | Investigation on standing stalls for horses with regard to animal welfare | Type | Conference Article | ||
| Year | 2008 | Publication | IESM 2008 | Abbreviated Journal | |
| Volume | Issue | Pages | |||
| Keywords | |||||
| Abstract | The aim of the present study was to test housing conditions of horses (65 horses) in standing stalls (13 farms) with regard to animal welfare. Further behavioural observations were made on 39 horses. 52 horses stabled in 3 farms housed under natural conditions provided as a basis for sampling. There were exclusively saddle horses as well as breeding horses present. The results of stabling conditions showed that most of the standing stalls fell short of the minimum requirements. 68% of standing stalls were too narrow, 38% not long enough and 28% of the tieing up systems were too short. Important behaviour patterns of social, recumbence resting, grooming and investigation behaviour, especially movement was extremely reduced in the standing stalls. 70% of the horses had no regular everyday lokomotion. A great part of the horses (51%) showed stereotypies. Half of these horses showed more than one stereotypy. The conclusion of the present study is: The standing stalls for horses do not take in account to the animal needs under present conditions in Germany. The research resulted in a ban of continuous “roped husbandry” of horses, in most Bundesländer in Germany. Adjacent countries, such as Austria and Switzerland implemented expressly in their animal rights bill (2006) and animal rights regulation (2008) a ban of continuous “roped husbandry” of horses. It is hoped that other nations will follow. |
||||
| Address |
Lehrstuhl für Ökologischen Landbau, AG Ethologie, Tierhaltung und Tierschutz, Wissenschaftszentrum Weihenstephan der Technischen Universität München | ||||
| Corporate Author | Zeitler-Feicht, M. H. | Thesis | |||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | IESM 2008 | ||
| Notes | Poster IESM 2008 | Approved | yes | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4473 | ||
| Permanent link to this record | |||||
| Author | Zeitler-Feicht, M.H. | ||||
| Title | [Critical consideration of the “Guideline for the Evaluation of Raising Horses” and keeping horses outside in the winter] | Type | Journal Article | ||
| Year | 2004 | Publication | DTW. Deutsche Tierarztliche Wochenschrift | Abbreviated Journal | Dtsch Tierarztl Wochenschr |
| Volume | 111 | Issue | 3 | Pages | 120-123 |
| Keywords | Animal Feed/standards; Animal Husbandry/legislation & jurisprudence/methods/*standards; *Animal Welfare/legislation & jurisprudence; Animals; Cold; Female; Germany; Guidelines/*standards; Horses/*physiology; Housing, Animal/legislation & jurisprudence/*standards; Legislation, Veterinary; Male; Seasons | ||||
| Abstract | The guidelines of the Federal Ministry of User Protection, Nutrition and Agriculture (BMVEL) regarding “horse keeping with respect to animal welfare” are from 1995 (BMELF, 1995). Therefore, they are not suitable for modern horse keeping. The Veterinary Association for Animal Welfare (TVT) held it to be necessary to rework the guide-lines in light of 1) many subsequent investigations concerning horse keeping, and 2) the species-specific needs of horses in practice. Each chapter of the BMELF (1995) guide-lines was revised such that the literature and practical experiences were updated. Several chapters (recumbency resting behaviour, fences, underground outdoor and in stables, litter) were added in the position paper of the TVT to reflect the increasing use of boxes with paddocks, loose housing systems with open yards, pasture and winter yards as housing conditions. Keeping horses outdoors permanently during winter is possible because horses have very good thermoregulatory capabilities so that they are able to adapt themselves to cold conditions. However, in light of animal welfare, the holding system must include adequate shelter (natural or artificial). Shelters should protect against wetness, heat, cold and wind, and must be sufficiently large and high, with a dry and clean underground. In keeping horses outdoors permanently, the paths to the feeding and watering areas and to the shelter must be dry. The food must also be protected against mould and soiling. Keeping horses permanently without adequate shelter or in deep marsh without any dry places is against the Animal Protection Act. | ||||
| Address |
Lehrgebiet fur Tierhaltung und Verhaltenskunde, Wissenschaftszentrum Weihenstephan fur Ernahrung, Landnutzung und Umwelt, Technische Universitat Munchen. Zeitler-Feicht@tz.agrar.tu-muenchen.de | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | German | Summary Language | Original Title | Kritische Betrachtung der “Leitlinien zur Beurteilung von Pferdehaltungen” und Winteraussenhaltung von Pferden | |
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0341-6593 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:15195962 | Approved | no | ||
| Call Number | Serial | 1900 | |||
| Permanent link to this record | |||||
| Author | Beran, M.J. | ||||
| Title | Capuchin monkeys (Cebus apella) succeed in a test of quantity conservation | Type | Journal Article | ||
| Year | 2007 | Publication | Animal Cognition | Abbreviated Journal | Anim. Cogn. |
| Volume | Issue | Pages | |||
| Keywords | |||||
| Abstract | Nonhuman animals demonstrate a number of impressive quantitative skills such as counting sets of items, comparing sets on the basis of the number of items or amount of material, and even responding to simple arithmetic manipulations. In this experiment, capuchin monkeys were presented with a computerized task designed to assess conservation of discrete quantity. Monkeys first were trained to select from two horizontal arrays of stimuli the one with the larger number of items. On some trials, after a correct selection there was no feedback but instead an additional manipulation of one of those arrays. In some cases, this manipulation involved moving items closer together or farther apart to change the physical arrangement of the array but not the quantity of items in the array. In other cases, additional items were added to the initially smaller array so that it became quantitatively larger. Monkeys then made a second selection from the two arrays of items. Previous research had shown that rhesus monkeys (Macaca mulatta) succeeded with this task. However, there was no condition in that study in which items were added to the smaller array without increasing its quantity to a point where it became the new larger array. This new condition was added in the present experiment. Capuchin monkeys were sensitive to all of these manipulations, changing their selections when the manipulations changed which array contained the larger number of items but not when the manipulations changed the physical arrangement of items or increased the quantity in one array without also reversing which of the two arrays had more items. Therefore, capuchin monkeys responded on the basis of the quantity of items, and they were not distracted by non-quantitative manipulations of the arrays. The data indicate that capuchins are sensitive to simply arithmetic manipulations that involve addition of items to arrays and also that they can conserve quantity. | ||||
| Address |
Language Research Center, Georgia State University, University Plaza, Atlanta, GA, 30303, USA, mjberan@yahoo.com | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1435-9448 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:17549530 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 2394 | ||
| Permanent link to this record | |||||
| Author | Beran, M.J.; Beran, M.M.; Harris, E.H.; Washburn, D.A. | ||||
| Title | Ordinal judgments and summation of nonvisible sets of food items by two chimpanzees and a rhesus macaque | Type | Journal Article | ||
| Year | 2005 | Publication | Journal of Experimental Psychology. Animal Behavior Processes | Abbreviated Journal | J Exp Psychol Anim Behav Process |
| Volume | 31 | Issue | 3 | Pages | 351-362 |
| Keywords | Animals; Behavior, Animal; Chi-Square Distribution; Cognition; Color Perception/physiology; Female; *Food; Judgment/*physiology; Macaca mulatta; Male; Pan troglodytes; Serial Learning/*physiology; Size Perception | ||||
| Abstract | Two chimpanzees and a rhesus macaque rapidly learned the ordinal relations between 5 colors of containers (plastic eggs) when all containers of a given color contained a specific number of identical food items. All 3 animals also performed at high levels when comparing sets of containers with sets of visible food items. This indicates that the animals learned the approximate quantity of food items in containers of a given color. However, all animals failed in a summation task, in which a single container was compared with a set of 2 containers of a lesser individual quantity but a greater combined quantity. This difficulty was not overcome by sequential presentation of containers into opaque receptacles, but performance improved if the quantitative difference between sizes was very large. | ||||
| Address |
Language Research Center, Georgia State University, Decatur, 30034, USA. mjberan@yahoo.com | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0097-7403 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:16045389 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 2766 | ||
| Permanent link to this record | |||||
| Author | Beran, M.J.; Smith, J.D.; Redford, J.S.; Washburn, D.A. | ||||
| Title | Rhesus macaques (Macaca mulatta) monitor uncertainty during numerosity judgments | Type | Journal Article | ||
| Year | 2006 | Publication | Journal of Experimental Psychology. Animal Behavior Processes | Abbreviated Journal | J Exp Psychol Anim Behav Process |
| Volume | 32 | Issue | 2 | Pages | 111-119 |
| Keywords | Animals; *Cognition; *Judgment; Macaca mulatta/*psychology; Male; Mathematics; *Pattern Recognition, Visual; *Uncertainty | ||||
| Abstract | Two rhesus macaques (Macaca mulatta) judged arrays of dots on a computer screen as having more or fewer dots than a center value that was never presented in trials. After learning a center value, monkeys were given an uncertainty response that let them decline to make the numerosity judgment on that trial. Across center values (3-7), errors occurred most often for sets adjacent in numerosity to the center value. The monkeys also used the uncertainty response most frequently on these difficult trials. A 2nd experiment showed that monkeys' responses reflected numerical magnitude and not the surface-area illumination of the displays. This research shows that monkeys' uncertainty-monitoring capacity extends to the domain of numerical cognition. It also shows monkeys' use of the purest uncertainty response possible, uncontaminated by any secondary motivator. | ||||
| Address |
Language Research Center, Georgia State University, Atlanta, 30302, USA. mjberan@yahoo.com | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0097-7403 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:16634654 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 2762 | ||
| Permanent link to this record | |||||
| Author | Beran, M.J.; Pate, J.L.; Washburn, D.A.; Rumbaugh, D.M. | ||||
| Title | Sequential responding and planning in chimpanzees (Pan troglodytes) and rhesus macaques (Macaca mulatta) | Type | Journal Article | ||
| Year | 2004 | Publication | Journal of Experimental Psychology. Animal Behavior Processes | Abbreviated Journal | J Exp Psychol Anim Behav Process |
| Volume | 30 | Issue | 3 | Pages | 203-212 |
| Keywords | Animals; *Cognition; Female; Goals; Learning; Macaca mulatta/*psychology; Male; *Mathematics; Pan troglodytes/*psychology; Task Performance and Analysis | ||||
| Abstract | Chimpanzees (Pan troglodytes) and rhesus macaques (Macaca mulatta) selected either Arabic numerals or colored squares on a computer monitor in a learned sequence. On shift trials, the locations of 2 stimuli were interchanged at some point. More errors were made when this interchange occurred for the next 2 stimuli to be selected than when the interchange was for stimuli later in the sequence. On mask trials, all remaining stimuli were occluded after the 1st selection. Performance exceeded chance levels for only 1 selection after these masks were applied. There was no difference in performance for either stimulus type (numerals or colors). The data indicated that the animals planned only the next selection during these computerized tasks as opposed to planning the entire response sequence. | ||||
| Address |
Language Research Center, Georgia State University, Atlanta 30303, USA. mjberan@yahoo.com | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0097-7403 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:15279511 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 2767 | ||
| Permanent link to this record | |||||