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Author |
Harlow, H.F. |
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Title  |
Learning and satiation of response in intrinsically motivated complex puzzle performance by monkeys |
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Journal Article |
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Year |
1950 |
Publication |
Journal of Comparative and Physiological Psychology |
Abbreviated Journal |
J Comp Physiol Psychol |
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43 |
Issue |
4 |
Pages |
289-294 |
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Keywords |
Animals; *Haplorhini; *Learning; *Motivation; *Psychology; *Satiation; *Learning; *Motivation; *Psychology |
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Abstract |
Two rhesus monkeys, given 60 two-hour sessions with a six-device mechanical puzzle showed clear evidence of learning, the curve showing ratio of incorrect to correct responses appearing quite comparable to similar curves obtained during externally rewarded situations. When, on the thirteenth day of tests, the subjects were presented with the puzzle 100 times at 6-minute intervals, the number of devices manipulated decreased regularly throughout the day, although there was no significant change in the number of times the problem assembly was attacked. |
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English |
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0021-9940 |
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PMID:15436888 |
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Equine Behaviour @ team @ |
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6550 |
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Author |
Pawluski, J.; Jego, P.; Henry, S.; Bruchet, A.; Palme, R.; Coste, C.; Hausberger, M. |
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Title |
Low plasma cortisol and fecal cortisol metabolite measures as indicators of compromised welfare in domestic horses (Equus caballus) |
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Journal Article |
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Year |
2017 |
Publication |
Plos One |
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Plos One |
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12 |
Issue |
9 |
Pages |
e0182257 |
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The hypothalamic-pituitary-adrenal (HPA) axis response to chronic stress is far from straight forward, particularly with regards to animal welfare. There are reports of no effect as well as both decreases and increases in cortisol after chronic stressors. Therefore, the first aim of the present study was to determine how measures of compromised welfare, such as chronic pain and haematological anomalies, related to cortisol levels in domestic horses (Equus caballus). Domestic horses are an informative model to investigate the impact of chronic stress (due to environment, pain, work, housing conditions...) on the HPA axis. The second aim was to determine whether levels of fecal cortisol metabolites (FCM) may be used as an indicator of welfare measures. The present study used fifty-nine horses (44 geldings and 15 mares), from three riding centres in Brittany, France. The primary findings show that horses whose welfare was clearly compromised (as indicated by an unusual ears backward position, presence of vertebral problems or haematological anomalies, e.g. anaemia) also had lower levels of both FCM and plasma cortisol. This work extends our previous findings showing that withdrawn postures, indicators of depressive-like behavior in horses, are associated with lower plasma cortisol levels. We also found that evening plasma cortisol levels positively correlated with FCM levels in horses. Future research aims to determine the extent to which factors of influence on welfare, such as living conditions (e.g. single stalls versus group housing in pasture or paddocks), early life factors, and human interaction, act as mediators of cortisol levels in horses. |
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Public Library of Science |
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Equine Behaviour @ team @ |
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6516 |
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Author |
Griebenow, K.; Klibanov, A.M. |
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Title |
Lyophilization-induced reversible changes in the secondary structure of proteins |
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Journal Article |
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Year |
1995 |
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Proc Natl Acad Sci USA |
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92 |
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24 |
Pages |
10969-10976 |
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Changes in the secondary structure of some dozen different proteins upon lyophilization of their aqueous solutions have been investigated by means of Fourier-transform infrared spectroscopy in the amide III band region. Dehydration markedly (but reversibly) alters the secondary structure of all the proteins studied, as revealed by both the quantitative analysis of the second derivative spectra and the Gaussian curve fitting of the original infrared spectra. Lyophilization substantially increases the beta-sheet content and lowers the alpha-helix content of all proteins. In all but one case, proteins become more ordered upon lyophilization. |
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Equine Behaviour @ team @ |
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6519 |
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Author |
Kruska, D. |
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Title |
Mammalian domestication and its effect on brain structure and behavior |
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Book Chapter |
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Year |
1988 |
Publication |
Intelligence and Evolutionary Biology |
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Springer-Verlag |
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New York |
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Jerison, H.J.; Jerison, I. |
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Equine Behaviour @ team @ Kruska1988 |
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6232 |
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Author |
Hartmann, E.; Bøe, K.E.; Jørgensen, G.H.M.; Mejdell, C.M.; Dahlborn, K. |
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Management of horses with focus on blanketing and clipping practices reported by members of the Swedish and Norwegian equestrian community1 |
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Journal Article |
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Year |
2017 |
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Journal of Animal Science |
Abbreviated Journal |
J Anim Sci |
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95 |
Issue |
3 |
Pages |
1104-1117 |
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Limited information is available on the extent to which blankets are used on horses and the owners' reasoning behind clipping the horse's coat. Research on the effects of those practices on horse welfare is scarce but results indicate that blanketing and clipping may not be necessary from the horse's perspective and can interfere with the horse's thermoregulatory capacities. Therefore, this survey collected robust, quantitative data on the housing routines and management of horses with focus on blanketing and clipping practices as reported by members of the Swedish and Norwegian equestrian community. Horse owners were approached via an online survey, which was distributed to equestrian organizations and social media. Data from 4,122 Swedish and 2,075 Norwegian respondents were collected, of which 91 and 84% of respondents, respectively, reported using blankets on horses during turnout. Almost all respondents owning warmblood riding horses used blankets outdoors (97% in Sweden and 96% in Norway) whereas owners with Icelandic horses and coldblood riding horses used blankets significantly less (P < 0.05). Blankets were mainly used during rainy, cold, or windy weather conditions and in ambient temperatures of 10°C and below. The horse's coat was clipped by 67% of respondents in Sweden and 35% of Norwegian respondents whereby owners with warmblood horses and horses primarily used for dressage and competition reported clipping the coat most frequently. In contrast to scientific results indicating that recovery time after exercise increases with blankets and that clipped horses have a greater heat loss capacity, only around 50% of respondents agreed to these statements. This indicates that evidence-based information on all aspects of blanketing and clipping has not yet been widely distributed in practice. More research is encouraged, specifically looking at the effect of blankets on sweaty horses being turned out after intense physical exercise and the effect of blankets on social interactions such as mutual grooming. Future efforts should be tailored to disseminate knowledge more efficiently, which can ultimately stimulate thoughtful decision-making by horse owners concerning the use of blankets and clipping the horse's coat. |
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0021-8812 |
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Equine Behaviour @ team @ |
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6615 |
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Author |
Saunders, F.C.; McElligott, A.G.; Safi, K.; Hayden, T.J. |
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Title |
Mating tactics of male feral goats (Capra hircus): risks and benefits |
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Journal Article |
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2005 |
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Acta Ethol |
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8 |
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Equine Behaviour @ team @ Saunders2005 |
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6252 |
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Author |
Bödeker, E. |
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Title |
Maultierzucht und Maultierhaltung |
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1908 |
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Handbuch der gesamten Landwirtschaft. |
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3 |
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46 |
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Max Jänecke |
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Hannover |
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Equine Behaviour @ team @ |
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6545 |
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Author |
Squire, L. |
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Title |
Memory systems of the brain: a brief history and current perspective |
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2004 |
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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 |
Reinhardt, I.; Kluth, G.; Nowak, C.; Szentiks, C.A.; Krone, O.; Ansorge, H.; Mueller, T. |
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Title |
Military training areas facilitate the recolonization of wolves in Germany |
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Journal Article |
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2019 |
Publication |
Conservation Letters |
Abbreviated Journal |
Conservation Letters |
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12 |
Issue |
3 |
Pages |
e12635 |
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Canis lupus; large carnivores; population growth; protected areas; recolonization |
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Abstract Wolves (Canis lupus) are currently showing a remarkable comeback in the highly fragmented cultural landscapes of Germany. We here show that wolf numbers increased exponentially between 2000 and 2015 with an annual increase of about 36%. We demonstrate that the first territories in each newly colonized region were established over long distances from the nearest known reproducing pack on active military training areas (MTAs). We show that MTAs, rather than protected areas, served as stepping-stones for the recolonization of Germany facilitating subsequent spreading of wolf territories in the surrounding landscape. We did not find any significant difference between MTAs and protected areas with regard to habitat. One possible reason for the importance of MTAs may be their lower anthropogenic mortality rates compared to protected and other areas. To our knowledge, this is the first documented case where MTAs facilitate the recolonization of an endangered species across large areas. |
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John Wiley & Sons, Ltd |
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1755-263x |
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https://doi.org/10.1111/conl.12635 |
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Equine Behaviour @ team @ |
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6676 |
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Author |
Galaverni, M.; Palumbo, D.; Fabbri, E.; Caniglia, R.; Greco, C.; Randi, E. |
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Monitoring wolves (Canis lupus) by non-invasive genetics and camera trapping: A small-scale pilot study |
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2012 |
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Eur J Wildl Res |
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58 |
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Equine Behaviour @ team @ Galaverni2012 |
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6479 |
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