| Records |
| Author |
Leaver, L.; Hopewell, L.; Caldwell, C.; Mallarky, L. |
| Title |
Audience effects on food caching in grey squirrels (Sciurus carolinensis): evidence for pilferage avoidance strategies |
Type |
Journal Article |
| Year |
2007 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
10 |
Issue |
1 |
Pages |
23-27 |
| Keywords |
Caching – Deception – Pilferage – Grey squirrels – Sciurus carolinensis |
| Abstract |
Abstract If food pilferage has been a reliable selection pressure on food caching animals, those animals should have evolved the ability to protect their caches from pilferers. Evidence that animals protect their caches would support the argument that pilferage has been an important adaptive challenge. We observed naturally caching Eastern grey squirrels (Sciurus carolinensis) in order to determine whether they used any evasive tactics in order to deter conspecific and heterospecific pilferage. We found that grey squirrels used evasive tactics when they had a conspecific audience, but not when they had a heterospecific (corvid) audience. When other squirrels were present, grey squirrels spaced their caches farther apart and preferentially cached when oriented with their backs to other squirrels, but no such effect was found when birds were present. Our data provide the first evidence that caching mammals are sensitive to the risk of pilferage posed by an audience of conspecifics, and that they utilise evasive tactics that should help to minimise cache loss. We discuss our results in relation to recent theory of reciprocal pilferage and compare them to behaviours shown by caching birds. |
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Admin @ knut @ |
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4223 |
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| Author |
Taillon, J.; Cote, S.D. |
| Title |
Social rank and winter forage quality affect aggressiveness in white-tailed deer fawns |
Type |
Journal Article |
| Year |
2007 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
74 |
Issue |
2 |
Pages |
265-275 |
| Keywords |
aggressiveness; agonistic behaviour; body mass loss; dominance status; forage intake; Odocoileus virginianus; resource competition; social behaviour; white-tailed deer; winter forage quality |
| Abstract |
Achieving a high social rank may be advantageous for individuals at high population densities, because dominance status may determine the priority of access to limited resources and reduce individual loss of body mass. The establishment of dominance relationships between individuals involves variable levels of aggressiveness that can be influenced by resource availability. The relationship between social rank and aggressiveness and the impacts of resource abundance on aggressiveness are, however, poorly understood, but may be relevant to understand the mechanisms determining dominance relationships between individuals. We experimentally simulated, in seminatural enclosures, a deterioration of winter forage quality induced by a high-density deer population and examined the effects of (1) social dominance and (2) diet quality on aggressiveness, forage intake and body mass loss of white-tailed deer, Odocoileus virginianus, fawns during two winters. Within diet-quality treatments, fawns were consistently organized into linear hierarchies and showed clear dominance relationships. Dominants initiated more interactions and showed higher aggressiveness than subordinates, but subordinates had higher forage intake than dominants throughout winter. Social rank did not influence cumulative body mass loss of fawns. During both winters, fawns fed the control diet maintained their aggressiveness level, whereas fawns fed the poor-quality diet decreased it. Our experimental approach revealed that white-tailed deer responded to a reduction in winter forage quality by modifying their aggressiveness, indicating that ungulates may show plasticity not only in their foraging behaviour in response to decreased resources but also in their social behaviour. |
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Equine Behaviour @ team @ |
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4203 |
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| Author |
Sone, K. |
| Title |
[Apropos of 5 cases of so-called “delusions of cutaneous and intestinal infestation”--psychopathologic and neuropsychological considerations] |
Type |
Journal Article |
| Year |
1983 |
Publication |
Folia Psychiatrica et Neurologica Japonica |
Abbreviated Journal |
Folia Psychiatr Neurol Jpn |
| Volume |
37 |
Issue |
1 |
Pages |
37-55 |
| Keywords |
Adult; Aged; Agnosia/complications; Attitude to Health; Delusions/complications/etiology/*psychology; Female; Humans; Intestines; Male; Middle Aged; Personality; Psychotherapy; *Sensation; Skin |
| Abstract |
Five cases with so-called “Dermato- und Enterozoenwahn” are reported, and the following themes are analysed from the “multidimensional” point of view: 1) process to build the shape of the intruder which is bothering the patients, 2) behavior against the intruding small animal and attitude towards the therapeutist; their characteristic manner to make complaints, 3) premorbid personality and 4) physical findings. In regard to one of the formation types of this disease, we have postulated through the neuropsychological analysis of case 5 (somatoparaphrenic patient) that patients of the typical cases 1, 2 and 3 suffer from a special kind of agnosia (perturbation of recognition; disturbance of aperception) in which they take their abnormal body sensations for causing by the small imaginary animals. Our cases showed the importance of a premorbid personality and present life-situations in combination with physical dissolution taking part in the pathoplastic process of this particular disease. |
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German |
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Uber funf Falle von sogenanntem “Dermato- und Enterozoenwahn”--psychopathologische und neuropsychologische Betrachtungen |
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0015-5721 |
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| Notes |
PMID:6884912 |
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no |
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Equine Behaviour @ team @ |
Serial |
4187 |
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| Author |
Rudran, R. |
| Title |
Adult male replacement in one-male troops of purple-faced langurs (Presbytis senex senex) and its effect on population structure |
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Journal Article |
| Year |
1973 |
Publication |
Folia Primatologica; International Journal of Primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
| Volume |
19 |
Issue |
2 |
Pages |
166-192 |
| Keywords |
Age Factors; Aggression; Animals; *Behavior, Animal; Female; *Haplorhini; Humans; Leadership; Male; Maternal Behavior; Population Density; Sex Factors; *Social Behavior; Social Dominance |
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English |
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0015-5713 |
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PMID:4201908 |
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no |
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Equine Behaviour @ team @ |
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4182 |
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| Author |
Griffin, B. |
| Title |
The use of fecal markers to facilitate sample collection in group-housed cats |
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Journal Article |
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2002 |
Publication |
Contemporary Topics in Laboratory Animal Science / American Association for Laboratory Animal Science |
Abbreviated Journal |
Contemp Top Lab Anim Sci |
| Volume |
41 |
Issue |
2 |
Pages |
51-56 |
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Animals; Behavior, Animal; Biological Markers/*analysis; Cats/*physiology/psychology; Diet/veterinary; Feces/*chemistry; Food Coloring Agents/analysis; Housing, Animal; Individuality; Plastics/analysis; Specimen Handling/methods/*veterinary |
| Abstract |
The provision of proper social housing is a priority when designing an experiment using domestic cats as laboratory animals. When animals are group-housed, studies requiring analysis of stool samples from individual subjects pose difficulty in sample collection and identification. In this study, commercially available concentrated food colorings (known as bakers pastes) were used as fecal markers in group-housed cats. Cats readily consumed 0.5 ml of bakers paste food coloring once daily in canned cat food. Colorings served as fecal markers by imparting a distinct color to each cat s feces, allowing identification in the litter box. In addition, colored glitter (1/8 teaspoon in canned food) was fed to cats and found to be a reliable fecal marker. Long-term feeding of colorings and glitter was found to be safe and effective at yielding readily identifiable stools. |
| Address |
Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Alabama 36841, USA |
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English |
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1060-0558 |
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PMID:11958604 |
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no |
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Equine Behaviour @ team @ |
Serial |
4165 |
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| Author |
Hart, D.; Whitlow, J.W.J. |
| Title |
The experience of self in the bottlenose dolphin |
Type |
Journal Article |
| Year |
1995 |
Publication |
Consciousness and Cognition |
Abbreviated Journal |
Conscious Cogn |
| Volume |
4 |
Issue |
2 |
Pages |
244-247 |
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Animal Communication; Animals; *Awareness; Body Image; Dolphins/*psychology; Female; Humans; Male; *Self Concept; Social Behavior; Species Specificity; *Television; *Visual Perception |
| Abstract |
Marten and Psarakos have presented some evidence which suggests that objective self-awareness and possibly representations of self may characterize the dolphins' experience of self. Their research demonstrates the possibility of similarities in the sense of self between primate species and dolphins, although whether dolphins have subjective self-awareness, personal memories, and theories of self--all important facets of the sense of self in humans--was not examined. Clearly, even this limited evidence was difficult to achieve; the difficulties in adapting methods and coding behavior are quite apparent in their report. Future progress, however, may depend upon clarification of what are the necessary components for a sense of self and an explication of how these might be reflected in dolphin behavior. We are mindful of the authors' point (pp. 219 and 220) that the dolphin lives more in an acoustic than a visual environment. Thus, while tasks relying upon vision may reveal the presence or absence of the sense of self in primates, it might well be the case that in dolphins self-related experiences might be better revealed in auditory tasks. But then, what is the nature of human self-awareness in terms of audition? While both conceptual and methodological hurdles remain, Marten and Psarakos have demonstrated that important questions can be asked about the minds and phenomenal worlds of nonanthropoid species. |
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Department of Psychology, Rutgers University, Camden, New Jersey 08102, USA |
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English |
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1053-8100 |
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PMID:8521264 |
Approved |
no |
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Equine Behaviour @ team @ |
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4162 |
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| Author |
Loveland, K.A. |
| Title |
Self-recognition in the bottlenose dolphin: ecological considerations |
Type |
Journal Article |
| Year |
1995 |
Publication |
Consciousness and Cognition |
Abbreviated Journal |
Conscious Cogn |
| Volume |
4 |
Issue |
2 |
Pages |
254-257 |
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Animals; Attention; *Awareness; Body Image; Dolphins/*psychology; Exploratory Behavior; Female; Male; *Self Concept; *Social Environment; Species Specificity; Television; *Visual Perception |
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Department of Psychiatry and Behavioral Sciences, University of Texas Medical School, Houston 77025, USA |
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English |
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1053-8100 |
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PMID:8521267 |
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no |
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Equine Behaviour @ team @ |
Serial |
4161 |
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Heath-Lange, S.; Ha, J.C.; Sackett, G.P. |
| Title |
Behavioral measurement of temperament in male nursery-raised infant macaques and baboons |
Type |
Journal Article |
| Year |
1999 |
Publication |
American journal of primatology |
Abbreviated Journal |
Am. J. Primatol. |
| Volume |
47 |
Issue |
1 |
Pages |
43-50 |
| Keywords |
Age Factors; Animal Technicians; Animals; Animals, Newborn/psychology; Behavior, Animal/*physiology; Defecation; Facial Expression; Humans; Irritable Mood; Macaca fascicularis/*psychology; Male; Papio/*psychology; Sex Characteristics; Species Specificity; Temperament/*physiology; Urination; Vocalization, Animal; Weaning |
| Abstract |
We define temperament as an individual's set of characteristic behavioral responses to novel or challenging stimuli. This study adapted a temperament scale used with rhesus macaques by Schneider and colleagues [American Journal of Primatology 25:137-155, 1991] for use with male pigtailed macaque (Macaca nemestrina, n = 7), longtailed macaque (M. fascicularis, n = 3), and baboon infants (Papio cynocephalus anubis, n = 4). Subjects were evaluated twice weekly for the first 5 months of age during routine removal from their cages for weighing. Behavioral measures were based on the subject's interactions with a familiar human caretaker and included predominant state before capture, response to capture, contact latency, resistance to tester's hold, degree of clinging, attention to environment, defecation/urination, consolability, facial expression, vocalizations, and irritability. Species differences indicated that baboons were more active than macaques in establishing or terminating contact with the tester. Temperament scores decreased over time for the variables Response to Capture and Contact Latency, indicating that as they grew older, subjects became less reactive and more bold in their interactions with the tester. Temperament scores changed slowly with age, with greater change occurring at younger ages. The retention of variability in reactivity between and within species may be advantageous for primates, reflecting the flexibility necessary to survive in a changing environment. |
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Department of Psychology and Regional Primate Research Center, University of Washington, Seattle, USA. crgsjh@vmmc.org |
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English |
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0275-2565 |
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| Notes |
PMID:9888720 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
4117 |
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Thiel, D.; Jenni-Eiermann, S.; Palme, R. |
| Title |
Measuring corticosterone metabolites in droppings of capercaillies (Tetrao urogallus) |
Type |
Journal Article |
| Year |
2005 |
Publication |
Annals of the New York Academy of Sciences |
Abbreviated Journal |
Ann N Y Acad Sci |
| Volume |
1046 |
Issue |
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Pages |
96-108 |
| Keywords |
Adrenocorticotropic Hormone/administration & dosage/analysis/metabolism; Animals; Circadian Rhythm; Corticosterone/administration & dosage/*analysis/*metabolism; Feces/*chemistry; Female; Freezing; Galliformes/*metabolism; Male; Reproducibility of Results; Sex Factors; Temperature; Time Factors; Tritium/diagnostic use |
| Abstract |
The capercaillie (Tetrao urogallus), the largest grouse species in the world, is decreasing in numbers in major parts of its distribution range. Disturbances by human outdoor activities are discussed as a possible reason for this population decline. An indicator for disturbances is the increase of the glucocorticoid corticosterone, a stress hormone, which helps to cope with life-threatening situations. However, repeated disturbances might result in a long-term increase of the basal corticosterone concentration, which can result in detrimental effects like reduced fitness and survival of an animal. To measure corticosterone metabolites (CMs) noninvasively in the droppings of free-living capercaillies, first an enzyme immunoassay (EIA) in captive birds had to be selected and validated. Therefore, the excretion pattern of intravenously injected radiolabeled corticosterone was determined and 3H metabolites were characterized. High-performance liquid chromatography (HPLC) separations of the samples containing peak concentrations revealed that corticosterone was extensively metabolized. The HPLC fractions were tested in several EIAs for glucocorticoid metabolites. The physiological relevance of this method was proved after pharmacological stimulation of the adrenocortical activity. Only the recently established cortisone assay, measuring CMs with a 3,11-dione structure, detected an expressed increase of concentrations following ACTH stimulation. To set up a sampling protocol suited for the field, we examined the influence of various storage conditions and time of day on concentrations of CMs. |
| Address |
Swiss Ornithological Institute, 6204 Sempach, Switzerland. dominik.thiel@vogelwarte.ch |
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English |
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0077-8923 |
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PMID:16055846 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
4079 |
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Ikeda, M.; Patterson, K.; Graham, K.S.; Ralph, M.A.L.; Hodges, J.R. |
| Title |
A horse of a different colour: do patients with semantic dementia recognise different versions of the same object as the same? |
Type |
Journal Article |
| Year |
2006 |
Publication |
Neuropsychologia |
Abbreviated Journal |
Neuropsychologia |
| Volume |
44 |
Issue |
4 |
Pages |
566-575 |
| Keywords |
Adult; Aged; Anomia/diagnosis/psychology; Atrophy; *Attention; Color Perception; Dementia/*diagnosis/psychology; *Discrimination Learning; Dominance, Cerebral; Female; Humans; Male; *Memory, Short-Term; Middle Aged; Neuropsychological Tests; Orientation; *Pattern Recognition, Visual; Reference Values; Retention (Psychology); Semantics; Size Perception; Temporal Lobe/pathology |
| Abstract |
Ten patients with semantic dementia resulting from bilateral anterior temporal lobe atrophy, and 10 matched controls, were tested on an object recognition task in which they were invited to choose (from a four-item array) the picture representing “the same thing” as an object picture that they had just inspected and attempted to name. The target in the response array was never physically identical to the studied picture but differed from it – in the various conditions – in size, angle of view, colour or exemplar (e.g. a different breed of dog). In one test block for each patient, the response array was presented immediately after the studied picture was removed; in another block, a 2 min filled delay was inserted between study and test. The patients performed relatively well when the studied object and target response differed only in the size of the picture on the page, but were significantly impaired as a group in the other three type-of-change conditions, even with no delay between study and test. The five patients whose structural brain imaging revealed major right-temporal atrophy were more impaired overall, and also more affected by the 2 min delay, than the five patients with an asymmetric pattern characterised by predominant left-sided atrophy. These results are interpreted in terms of a hypothesis that successful classification of an object token as an object type is not a pre-semantic ability but rather results from interaction of perceptual and conceptual processing. |
| Address |
Department of Neuropsychiatry, Ehime University School of Medicine, Shitsukawa, Toon City, Ehime 791-0295, Japan. mikeda@m.ehime-u.ac.jp |
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English |
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0028-3932 |
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| Notes |
PMID:16115656 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
4059 |
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