Records |
Author |
Overli, O.; Sorensen, C.; Pulman, K.G.T.; Pottinger, T.G.; Korzan, W.; Summers, C.H.; Nilsson, G.E. |
Title ![sorted by Title field, ascending order (up)](img/sort_asc.gif) |
Evolutionary background for stress-coping styles: relationships between physiological, behavioral, and cognitive traits in non-mammalian vertebrates |
Type |
Journal Article |
Year |
2007 |
Publication |
Neuroscience and Biobehavioral Reviews |
Abbreviated Journal |
Neurosci Biobehav Rev |
Volume |
31 |
Issue |
3 |
Pages |
396-412 |
Keywords |
Adaptation, Psychological/*physiology; Animals; Behavior, Animal/*physiology; Biogenic Monoamines/physiology; Brain/physiology; Cognition/*physiology; Evolution; Glucocorticoids/*physiology; Individuality; Lizards; Oncorhynchus mykiss; Social Dominance; Stress, Psychological/*psychology |
Abstract |
Reactions to stress vary between individuals, and physiological and behavioral responses tend to be associated in distinct suites of correlated traits, often termed stress-coping styles. In mammals, individuals exhibiting divergent stress-coping styles also appear to exhibit intrinsic differences in cognitive processing. A connection between physiology, behavior, and cognition was also recently demonstrated in strains of rainbow trout (Oncorhynchus mykiss) selected for consistently high or low cortisol responses to stress. The low-responsive (LR) strain display longer retention of a conditioned response, and tend to show proactive behaviors such as enhanced aggression, social dominance, and rapid resumption of feed intake after stress. Differences in brain monoamine neurochemistry have also been reported in these lines. In comparative studies, experiments with the lizard Anolis carolinensis reveal connections between monoaminergic activity in limbic structures, proactive behavior in novel environments, and the establishment of social status via agonistic behavior. Together these observations suggest that within-species diversity of physiological, behavioral and cognitive correlates of stress responsiveness is maintained by natural selection throughout the vertebrate sub-phylum. |
Address |
Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 As, Norway. oyvind.overli@umb.no |
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0149-7634 |
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PMID:17182101 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2801 |
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Author |
Bell, A.M. |
Title ![sorted by Title field, ascending order (up)](img/sort_asc.gif) |
Evolutionary biology: animal personalities |
Type |
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Year |
2007 |
Publication |
Nature |
Abbreviated Journal |
Nature |
Volume |
447 |
Issue |
7144 |
Pages |
539-540 |
Keywords |
Aggression/physiology/psychology; Animals; Behavior, Animal/*physiology; *Evolution; Humans; *Models, Biological; Personality/genetics/*physiology; Reproduction/genetics/physiology; Risk-Taking; Selection (Genetics) |
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ISSN |
1476-4687 |
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Notes |
PMID:17538607 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
4099 |
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Author |
Caldwell, C.A.; Whiten, A. |
Title ![sorted by Title field, ascending order (up)](img/sort_asc.gif) |
Evolutionary perspectives on imitation: is a comparative psychology of social learning possible? |
Type |
Journal Article |
Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
5 |
Issue |
4 |
Pages |
193-208 |
Keywords |
Animals; *Behavior, Animal; Evolution; Humans; *Imitative Behavior; Learning; Models, Animal |
Abstract |
Studies of imitation in animals have become numerous in recent times, but do they contribute to a comparative psychology of social learning? We review this burgeoning field to identify the problems and prospects for such a goal. Difficulties of two main kinds are identified. First, researchers have tackled questions about social learning from at least three very different theoretical perspectives, the “phylogenetic”, “animal model”, and “adaptational”. We examine the conflicts between them and consider the scope for integration. A second difficulty arises in the methodological approaches used in the discipline. In relation to one of these – survey reviews of published studies – we tabulate and compare the contrasting conclusions of nine articles that together review 36 studies. The basis for authors' disagreements, including the matters of perceptual opacity, novelty, sequential structure, and goal representation, are examined. In relation to the other key method, comparative experimentation, we identify 12 studies that have explicitly compared species' imitative ability on similar tasks. We examine the principal problems of comparing like with like in these studies and consider solutions, the most powerful of which we propose to be the use of a systematic range of task designs, rather than any single “gold standard” task. |
Address |
School of Psychology, Washington Singer Laboratories, University of Exeter, Exeter EX4 4QG, UK. C.A.Caldwell@exeter.ac.uk |
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1435-9448 |
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Notes |
PMID:12461597 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2593 |
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Author |
Williams, N. |
Title ![sorted by Title field, ascending order (up)](img/sort_asc.gif) |
Evolutionary psychologists look for roots of cognition |
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Year |
1997 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
Volume |
275 |
Issue |
5296 |
Pages |
29-30 |
Keywords |
Animals; *Behavior, Animal; Birds; *Cognition; *Evolution; Female; Humans; Macaca mulatta/psychology; Male; Memory; Reward; *Social Sciences |
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ISSN |
0036-8075 |
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Notes |
PMID:8999531 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2845 |
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Author |
Verheyen, K.; Price, J.; Lanyon, L.; Wood, J. |
Title ![sorted by Title field, ascending order (up)](img/sort_asc.gif) |
Exercise distance and speed affect the risk of fracture in racehorses |
Type |
Journal Article |
Year |
2006 |
Publication |
Bone |
Abbreviated Journal |
Bone |
Volume |
39 |
Issue |
6 |
Pages |
1322-1330 |
Keywords |
Animals; Case-Control Studies; Cohort Studies; England; Exertion; Female; Fractures, Bone/etiology/*veterinary; Horse Diseases/*etiology; Horses/*injuries; Male; Physical Conditioning, Animal/adverse effects/methods; Poisson Distribution; Prospective Studies; Regression Analysis; Risk Factors; Running/injuries/physiology |
Abstract |
In order to gain insight into those training regimens that can minimise the risk of fracture in athletic populations, we conducted a large epidemiological study in racehorses. Thoroughbred racehorses provide a suitable model for studying fracture development and exercise-related risk factors in physically active populations. They represent a homogeneous population, undertaking intensive exercise programmes that are sufficiently heterogeneous to determine those factors that influence injury risk. Daily exercise information was recorded for a cohort of 1178 thoroughbreds that were monitored for up to 2 years. A total of 148 exercise-induced fractures occurred in the study population. Results from a nested case-control study showed a strong interactive effect of exercise distances at different speeds on fracture risk. Horses that exceeded 44 km at canter (< or =14 m/s) and 6 km at gallop (>14 m/s) in a 30-day period were at particularly increased risk of fracture. These distances equate to ca. 7700 bone loading cycles at canter and 880 loading cycles at gallop. Fifty-six fractures occurred in the subset of study horses that were followed since entering training as yearlings, when skeletally immature (n = 335). Cohort analysis of this data set showed that, in previously untrained bones, accumulation of canter exercise increased the risk of fracture (P < or = 0.01), whereas accumulation of high-speed gallop exercise had a protective effect (P < 0.01). However, increasing distances at canter and gallop in short time periods (up to one month) were associated with an increasing fracture risk. All training exercise involves a balance between the risk of fracture inherent in exposure to loading and the beneficial effect that loading has by stimulating bone cells to produce a more robust architecture. Results from our study provide important epidemiological evidence of the effects of physical exercise on bone adaptation and injury risk and can be used to inform the design of safer exercise regimens in physically active populations. |
Address |
Epidemiology Unit, Animal Health Trust, Newmarket, United Kingdom. kverheyen@rvc.ac.uk |
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8756-3282 |
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Notes |
PMID:16926125 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
4030 |
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Author |
Santos, L.R.; Barnes, J.L.; Mahajan, N. |
Title ![sorted by Title field, ascending order (up)](img/sort_asc.gif) |
Expectations about numerical events in four lemur species (Eulemur fulvus, Eulemur mongoz, Lemur catta and Varecia rubra) |
Type |
Journal Article |
Year |
2005 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
8 |
Issue |
4 |
Pages |
253-262 |
Keywords |
Animals; *Behavior, Animal; Female; Lemuridae/classification/*psychology; Male; *Pattern Recognition, Visual |
Abstract |
Although much is known about how some primates--in particular, monkeys and apes--represent and enumerate different numbers of objects, very little is known about the numerical abilities of prosimian primates. Here, we explore how four lemur species (Eulemur fulvus, E. mongoz, Lemur catta, and Varecia rubra) represent small numbers of objects. Specifically, we presented lemurs with three expectancy violation looking time experiments aimed at exploring their expectations about a simple 1+1 addition event. In these experiments, we presented subjects with displays in which two lemons were sequentially added behind an occluder and then measured subjects' duration of looking to expected and unexpected outcomes. In experiment 1, subjects looked reliably longer at an unexpected outcome of only one object than at an expected outcome of two objects. Similarly, subjects in experiment 2 looked reliably longer at an unexpected outcome of three objects than at an expected outcome of two objects. In experiment 3, subjects looked reliably longer at an unexpected outcome of one object twice the size of the original than at an expected outcome of two objects of the original size. These results suggest that some prosimian primates understand the outcome of simple arithmetic operations. These results are discussed in light of similar findings in human infants and other adult primates. |
Address |
Department of Psychology, Yale University, New Haven, CT 06520, USA. laurie.santos@yale.edu |
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1435-9448 |
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Notes |
PMID:15729569 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2492 |
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Author |
Boray, J.C. |
Title ![sorted by Title field, ascending order (up)](img/sort_asc.gif) |
Experimental fascioliasis in Australia |
Type |
Journal Article |
Year |
1969 |
Publication |
Advances in Parasitology |
Abbreviated Journal |
Adv Parasitol |
Volume |
7 |
Issue |
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Pages |
95-210 |
Keywords |
Adaptation, Biological; Adaptation, Physiological; Animal Nutrition Physiology; Animals; Animals, Laboratory; Australia; Cattle; *Cattle Diseases/pathology; Climate; *Disease Vectors; Ecology; Electron Transport; Estivation; Fasciola hepatica/enzymology/*growth & development/metabolism/physiology; Fascioliasis/epidemiology/immunology/*prevention & control/veterinary; Glycolysis; Guinea Pigs; Horses; Humans; Larva/growth & development/physiology; Marsupialia; Metamorphosis, Biological; Mice; New Guinea; New Zealand; Parasite Egg Count; Rats; Seasons; Sheep; *Sheep Diseases/pathology |
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0065-308X |
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PMID:4935272 |
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no |
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Equine Behaviour @ team @ |
Serial |
2744 |
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Author |
Mormède, P.; Andanson, S.; Aupérin, B.; Beerda, B.; Guémené, D.; Malmkvist, J.; Manteca, X.; Manteuffel, G.; Prunet, P.; van Reenen, C.G.; Richard, S.; Veissier, I. |
Title ![sorted by Title field, ascending order (up)](img/sort_asc.gif) |
Exploration of the hypothalamic-pituitary-adrenal function as a tool to evaluate animal welfare |
Type |
Journal Article |
Year |
2007 |
Publication |
Physiology & Behavior |
Abbreviated Journal |
Physiol. Behav. |
Volume |
92 |
Issue |
3 |
Pages |
317-339 |
Keywords |
Stress; Animal welfare; HPA axis; Glucocorticoid hormones; Acth; Dexamethasone suppression test; Cattle; Pig; Fur animals; Mink; Fox; Poultry; Fish |
Abstract |
Measuring HPA axis activity is the standard approach to the study of stress and welfare in farm animals. Although the reference technique is the use of blood plasma to measure glucocorticoid hormones (cortisol or corticosterone), several alternative methods such as the measurement of corticosteroids in saliva, urine or faeces have been developed to overcome the stress induced by blood sampling itself. In chronic stress situations, as is frequently the case in studies about farm animal welfare, hormonal secretions are usually unchanged but dynamic testing allows the demonstration of functional changes at several levels of the system, including the sensitization of the adrenal cortex to ACTH and the resistance of the axis to feedback inhibition by corticosteroids (dexamethasone suppression test). Beyond these procedural aspects, the main pitfall in the use of HPA axis activity is in the interpretation of experimental data. The large variability of the system has to be taken into consideration, since corticosteroid hormone secretion is usually pulsatile, follows diurnal and seasonal rhythms, is influenced by feed intake and environmental factors such as temperature and humidity, age and physiological state, just to cite the main sources of variation. The corresponding changes reflect the important role of glucocorticoid hormones in a number of basic physiological processes such as energy metabolism and central nervous system functioning. Furthermore, large differences have been found across species, breeds and individuals, which reflect the contribution of genetic factors and environmental influences, especially during development, in HPA axis functioning. Usually, these results will be integrated with data from behavioral observation, production and pathology records in a comprehensive approach of farm animal welfare. |
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Equine Behaviour @ team @ |
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4454 |
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Author |
Washburn, D.A.; Astur, R.S. |
Title ![sorted by Title field, ascending order (up)](img/sort_asc.gif) |
Exploration of virtual mazes by rhesus monkeys (Macaca mulatta) |
Type |
Journal Article |
Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
6 |
Issue |
3 |
Pages |
161-168 |
Keywords |
Animals; Choice Behavior/*physiology; Computer Peripherals; Macaca mulatta/*physiology; Male; Maze Learning/*physiology; Space Perception/*physiology; User-Computer Interface |
Abstract |
A chasm divides the huge corpus of maze studies found in the literature, with animals tested in mazes on the one side and humans tested with mazes on the other. Advances in technology and software have made possible the production and use of virtual mazes, which allow humans to navigate computerized environments and thus for humans and nonhuman animals to be tested in comparable spatial domains. In the present experiment, this comparability is extended even further by examining whether rhesus monkeys (Macaca mulatta) can learn to explore virtual mazes. Four male macaques were trained to manipulate a joystick so as to move through a virtual environment and to locate a computer-generated target. The animals succeeded in learning this task, and located the target even when it was located in novel alleys. The search pattern within the maze for these animals resembled the pattern of maze navigation observed for monkeys that were tested on more traditional two-dimensional computerized mazes. |
Address |
Department of Psychology, Georgia State University, Atlanta, GA 30303, USA. dwashburn@gsu.edu |
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1435-9448 |
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PMID:12750961 |
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no |
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Equine Behaviour @ team @ |
Serial |
2569 |
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Author |
Meese, G.B.; Ewbank, R. |
Title ![sorted by Title field, ascending order (up)](img/sort_asc.gif) |
Exploratory behaviour and leadership in the domesticated pig |
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Journal Article |
Year |
1973 |
Publication |
The British Veterinary Journal |
Abbreviated Journal |
Br. Vet. J. |
Volume |
129 |
Issue |
3 |
Pages |
251-259 |
Keywords |
Animals; Animals, Domestic; Behavior, Animal; Castration; *Exploratory Behavior; Female; *Leadership; Male; Sex Factors; Social Behavior; *Swine |
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0007-1935 |
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PMID:4728194 |
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2052 |
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