| Records |
| Author |
Deingruber, K. |
| Title |
Auswirkungen von Schallbelastungen durch Freizeitlärm auf das Hörvermögen – experimentelle Untersuchungen am Meerschweinchen |
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Manuscript |
| Year |
2004 |
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Ph.D. thesis |
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Ludwig-Maximilians-Universität München |
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Equine Behaviour @ team @ ediss1932 |
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5632 |
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| Author |
Zeitler-Feicht,; M. Walker, S.; Buxadé, C; Reiter, K. |
| Title |
Untersuchungen verschiedener Formen der Heuvorlage bei Pferden unter ethologischem Aspekt |
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Book Chapter |
| Year |
2004 |
Publication |
Aktuelle Arbeiten zur artgemäßen Tierhaltung |
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209-216 |
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Equine Behaviour @ team @ |
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5658 |
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| Author |
Zeitler-Feicht, M. H.; Walker, S.; Buxade, C.; Reiter, K. |
| Title |
Untersuchungen verschiedener Formen der Heuvorlage bei Pferden unter ethologischem Aspekt |
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Book Chapter |
| Year |
2004 |
Publication |
KTBL Schriften |
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437 |
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Equine Behaviour @ team @ |
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5764 |
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Hieshima, K.; Kawasaki, Y.; Hanamoto, H.; Nakayama, T.; Nagakubo, D.; Kanamaru, A.; Yoshie, O. |
| Title |
CC Chemokine Ligands 25 and 28 Play Essential Roles in Intestinal Extravasation of IgA Antibody-Secreting Cells |
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Journal Article |
| Year |
2004 |
Publication |
The Journal of Immunology |
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| Volume |
173 |
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6 |
Pages |
3668-3675 |
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| Abstract |
CCL25 (also known as thymus-expressed chemokine) and CCL28 (also known as mucosae-associated epithelial chemokine) play important roles in mucosal immunity by recruiting IgA Ab-secreting cells (ASCs) into mucosal lamina propria. However, their exact roles in vivo still remain to be defined. In this study, we first demonstrated in mice that IgA ASCs in small intestine expressed CCR9, CCR10, and CXCR4 on the cell surface and migrated to their respective ligands CCL25, CCL28, and CXCL12 (also known as stromal cell-derived factor 1), whereas IgA ASCs in colon mainly expressed CCR10 and CXCR4 and migrated to CCL28 and CXCL12. Reciprocally, the epithelial cells of small intestine were immunologically positive for CCL25 and CCL28, whereas those of colon were positive for CCL28 and CXCL12. Furthermore, the venular endothelial cells in small intestine were positive for CCL25 and CCL28, whereas those in colon were positive for CCL28, suggesting their direct roles in extravasation of IgA ASCs. Consistently, in mice orally immunized with cholera toxin (CT), anti-CCL25 suppressed homing of CT-specific IgA ASCs into small intestine, whereas anti-CCL28 suppressed homing of CT-specific IgA ASCs into both small intestine and colon. Reciprocally, CT-specific ASCs and IgA titers in the blood were increased in mice treated with anti-CCL25 or anti-CCL28. Anti-CXCL12 had no such effects. Finally, both CCL25 and CCL28 were capable of enhancing α4 integrin-dependent adhesion of IgA ASCs to mucosal addressin cell adhesion molecule-1 and VCAM-1. Collectively, CCL25 and CCL28 play essential roles in intestinal homing of IgA ASCs primarily by mediating their extravasation into intestinal lamina propria. |
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10.4049/jimmunol.173.6.3668 |
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Equine Behaviour @ team @ |
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6011 |
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| Author |
Nakagawa, S. |
| Title |
A farewell to Bonferroni: the problems of low statistical power and publication bias |
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Journal Article |
| Year |
2004 |
Publication |
Behav Ecol |
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15 |
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Equine Behaviour @ team @ Nakagawa2004 |
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6294 |
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| Author |
Squire, L. |
| Title |
Memory systems of the brain: a brief history and current perspective |
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Journal Article |
| Year |
2004 |
Publication |
Neurobiol Learn Mem |
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82 |
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Equine Behaviour @ team @ Squire2004 |
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6365 |
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| Author |
Santamaria, S.; Bobbert, M.E.; Back, W.; Barneveld, A.; van Weeren, P.R. |
| Title |
Variation in free jumping technique within and among horses with little experience in show jumping |
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Journal Article |
| Year |
2004 |
Publication |
American Journal of Veterinary Research |
Abbreviated Journal |
Am J Vet Res |
| Volume |
65 |
Issue |
7 |
Pages |
938-944 |
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*Acceleration; Analysis of Variance; Animals; Biomechanics; Forelimb/physiology; Gait/*physiology; Hindlimb/physiology; Horses/*physiology; Locomotion/*physiology; Models, Biological; Video Recording |
| Abstract |
OBJECTIVE: To quantify variation in the jumping technique within and among young horses with little jumping experience, establish relationships between kinetic and kinematic variables, and identify a limited set of variables characteristic for detecting differences in jumping performance among horses. ANIMALS: Fifteen 4-year-old Dutch Warmblood horses. PROCEDURE: The horses were raised under standardized conditions and trained in accordance with a fixed protocol for a short period. Subsequently, horses were analyzed kinematically during free jumping over a fence with a height of 1.05 m. RESULTS: Within-horse variation in all variables that quantified jumping technique was smaller than variation among horses. However, some horses had less variation than others. Height of the center of gravity (CG) at the apex of the jump ranged from 1.80 to 2.01 m among horses; this variation could be explained by the variation in vertical velocity of the CG at takeoff (r, 0.78). Horses that had higher vertical velocity at takeoff left the ground and landed again farther from the fence, had shorter push-off phases for the forelimbs and hind limbs, and generated greater vertical acceleration of the CG primarily during the hind limb push-off. However, all horses cleared the fence successfully, independent of jumping technique. CONCLUSIONS AND CLINICAL RELEVANCE: Each horse had its own jumping technique. Differences among techniques were characterized by variations in the vertical velocity of the CG at takeoff. It must be determined whether jumping performance later in life can be predicted from observing free jumps of young horses. |
| Address |
Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 12, NL-3584 CM Utrecht, The Netherlands |
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English |
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0002-9645 |
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| Notes |
PMID:15281652 |
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no |
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Equine Behaviour @ team @ |
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3772 |
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| Author |
Neuringer, A. |
| Title |
Reinforced variability in animals and people: implications for adaptive action |
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Journal Article |
| Year |
2004 |
Publication |
The American Psychologist |
Abbreviated Journal |
Am Psychol |
| Volume |
59 |
Issue |
9 |
Pages |
891-906 |
| Keywords |
Animals; Behavior, Animal; *Choice Behavior; Conditioning, Operant; Creativeness; Discrimination (Psychology); Humans; Memory; Problem Solving; *Reinforcement (Psychology) |
| Abstract |
Although reinforcement often leads to repetitive, even stereotyped responding, that is not a necessary outcome. When it depends on variations, reinforcement results in responding that is diverse, novel, indeed unpredictable, with distributions sometimes approaching those of a random process. This article reviews evidence for the powerful and precise control by reinforcement over behavioral variability, evidence obtained from human and animal-model studies, and implications of such control. For example, reinforcement of variability facilitates learning of complex new responses, aids problem solving, and may contribute to creativity. Depression and autism are characterized by abnormally repetitive behaviors, but individuals afflicted with such psychopathologies can learn to vary their behaviors when reinforced for so doing. And reinforced variability may help to solve a basic puzzle concerning the nature of voluntary action. |
| Address |
Department of Psychology, Reed College, Portland, OR 97202, USA. allen.neuringer@reed.edu |
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0003-066X |
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PMID:15584823 |
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no |
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Equine Behaviour @ team @ |
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4106 |
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| Author |
Sands, J.; Creel, S. |
| Title |
Social dominance, aggression and faecal glucocorticoid levels in a wild population of wolves, Canis lupus |
Type |
Journal Article |
| Year |
2004 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
67 |
Issue |
3 |
Pages |
387-396 |
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| Abstract |
Adrenal glucocorticoid (GC) secretion is an important component of the response to stress in vertebrates. A short-term increase in circulating GCs serves to redirect energy from processes that can be briefly curtailed without harm, allowing energy to be directed towards eliminating or avoiding the stressor. In contrast, prolonged elevation of GCs can cause a broad range of pathologies, including reproductive suppression. We examined whether social subordination in wolves leads to chronically elevated GC levels, and whether this [`]social stress' causes reproductive suppression of subordinates in cooperatively breeding species. Behavioural and endocrine data collected over 2 years from three packs of free-living wolves in Yellowstone National Park did not support this hypothesis. GC levels were significantly higher in dominant wolves than in subordinates, for both sexes, in all packs, in both years of study. Unlike other cooperatively breeding carnivores (e.g. dwarf mongooses, Helogale parvula, and African wild dogs, Lycaon pictus), high GCs in dominant wolves were not associated with high rates of aggression or agonistic interaction. Aggression increased for wolves of all ranks during mating periods, accompanied by a significant rise in GC levels. If chronic elevation of GCs carries fitness costs, then social stress in wolves (and many other social species) is a cost of dominance, not a consequence of subordination. The specific behavioural correlates of dominance that affect GC levels appear to vary among species, even those with similar social systems. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5222 |
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Robins, A.; Rogers, L.J. |
| Title |
Lateralized prey-catching responses in the cane toad, Bufo marinus: analysis of complex visual stimuli |
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Journal Article |
| Year |
2004 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
68 |
Issue |
4 |
Pages |
767-775 |
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We tested the responses of Bufo marinus to prey stimuli of varying visual complexity that were moved around the toads in either a clockwise or anticlockwise direction at 1.7 revolutions/min. Predatory responses directed at prey resembling an insect were frequent when the model insect moved clockwise across the visual midline into the right visual hemifield. In contrast, the toads tended to ignore such stimuli when they moved anticlockwise across the midline into the left hemifield. No such lateralization was found when a rectangular strip moved along its longest axis was presented in a similar way. The toads also directed more responses towards the latter stimulus than towards the insect prey. Hence, the results suggest that lateralized predatory responses occur for considered decisions on whether or not to respond to complex insect-like stimuli, but not for decisions on comparatively simple stimuli. We discuss similarities between the lateralized feeding responses of B. marinus and those of avian species, as support for the hypothesis that lateralized brain function in tetrapods may have arisen from a common lateralized ancestor. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5365 |
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