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Author Minton, J.E. url  openurl
  Title Function of the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system in models of acute stress in domestic farm animals Type Journal Article
  Year 1994 Publication Journal of Animal Science Abbreviated Journal (up) J. Anim Sci.  
  Volume 72 Issue 7 Pages 1891-1898  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2942  
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Author Walter, G.; Reisner, A. url  openurl
  Title Student opinion formation on animal agriculture issues Type Journal Article
  Year 1994 Publication Journal of Animal Science Abbreviated Journal (up) J. Anim Sci.  
  Volume 72 Issue 6 Pages 1654-1658  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2935  
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Author Gonyou, H.W. url  openurl
  Title Why the study of animal behavior is associated with the animal welfare issue Type Journal Article
  Year 1994 Publication Journal of Animal Science Abbreviated Journal (up) J. Anim Sci.  
  Volume 72 Issue 8 Pages 2171-2177  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2931  
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Author Sappington, B.F.; Goldman, L. url  openurl
  Title Discrimination learning and concept formation in the Arabian horse Type Journal Article
  Year 1994 Publication Journal of Animal Science Abbreviated Journal (up) J. Anim Sci.  
  Volume 72 Issue 12 Pages 3080-3087  
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  Abstract Discrimination learning and concept formation abilities were investigated in four mature Arabian horses. A series of two-choice discrimination problems were presented on stimulus panels that could open to allow access to food bowls. Selection of the correct stimulus resulted in food reinforcement, and an incorrect choice was not rewarded. The positions of the correct and incorrect stimuli were varied randomly during each test session, and the criterion for learning each problem was 85% correct for two consecutive sessions of 30 or 40 trials. Testing progressed through six discrimination problems. The first four were simple pattern discriminations, but the last two incorporated several different triangles as correct stimuli and thus involved the concept of triangularity. Two of the subjects successfully completed only simple pattern discriminations, one showed evidence of learning in the first concept problem, and one completed all six tests, including the two concept formation problems. The results demonstrate complex pattern discrimination ability in horses, and suggest that they may also have the ability to form and use concepts in problem solving.  
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  Call Number Equine Behaviour @ team @ Serial 3569  
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Author Judge, P.G.; de Waal, F.B.; Paul, K.S.; Gordon, T.P. openurl 
  Title Removal of a trauma-inflicting alpha matriline from a group of rhesus macaques to control severe wounding Type Journal Article
  Year 1994 Publication Laboratory animal science Abbreviated Journal (up) Lab Anim Sci  
  Volume 44 Issue 4 Pages 344-350  
  Keywords *Aggression; Animals; Female; *Macaca mulatta; Male; *Monkey Diseases; *Social Dominance; Wounds and Injuries/epidemiology/prevention & control/*veterinary  
  Abstract Wounding in an 83-member group of rhesus macaques (Macaca mulatta) housed at the Yerkes Regional Primate Research Center Field Station became excessive to the point that intervention was deemed necessary. When observations indicated that three females from the group's alpha matriline were principally responsible for the wounding, the matriline (N = 7) was removed from the group. This study was conducted to document an atypical pattern of wounding in this group and to evaluate the effectiveness of removal as a procedure for controlling injuries. The aggression rates of 21 adult subjects and the wounds of all group members were recorded before and after the removal procedure and compared with those in a similar-sized group. Removing the alpha matriline did not alter aggression rates in the group or the rank order among the remaining matrilines. Aggression rates in the experimental group were also not significantly different from those in the comparison group before or after the removal. With the alpha matriline present, wounding levels in the group were significantly higher than those in the comparison group. After removal of the matriline, the frequency of wounds decreased significantly to levels similar to those of the comparison group. The pattern of excess wounding attributed to the extracted alpha females was idiosyncratic, involving removal of large patches of skin from the hindquarters of adult females or removal of the distal portion of the fingers, toes, or tail from juveniles.(ABSTRACT TRUNCATED AT 250 WORDS)  
  Address Yerkes Regional Primate Research Center, Emory University, Atlanta, GA 30329  
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  ISSN 0023-6764 ISBN Medium  
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  Notes PMID:7983846 Approved no  
  Call Number refbase @ user @ Serial 207  
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Author Sugiyama Y openurl 
  Title Tool use by wild chimpanzees Type Journal Article
  Year 1994 Publication Nature Abbreviated Journal (up) Nature  
  Volume 376 Issue Pages 327  
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  Call Number Equine Behaviour @ team @ Serial 3041  
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Author McComb, K.; Clutton-Brock, T. doi  openurl
  Title Is mate choice copying or aggregation responsible for skewed distributions of females on leks? Type Journal Article
  Year 1994 Publication Proceedings. Biological sciences / The Royal Society Abbreviated Journal (up) Proc Biol Sci  
  Volume 255 Issue 1342 Pages 13-19  
  Keywords Animals; Deer/*physiology; Estrus/physiology; Female; Male; Phenotype; Sexual Behavior, Animal/*physiology; Territoriality  
  Abstract In several lek-breeding populations of birds and mammals, females arriving on leks tend to join males that already have females in their territories. This might occur either because females have an evolved preference for mating with males that are attractive to other females, or because they join groups of other females to obtain greater safety from predation or dangerous harassment by males. We have previously used controlled experiments to show that oestrous fallow deer females join males with established harems because they are attracted to female groups rather than to the males themselves. Here we demonstrate that the preference for males with females over males without females is specific to oestrous females and weak or absent in anoestrous ones, and that it is not associated with a preference for mating with males that have previously been seen to mate with other females. Furthermore, oestrous females given the choice between males that do not already have females with them show no significant preference for antlered over deantlered males or for older males over younger ones. We conclude that female attraction to other females on the lek is likely to be an adaptation to avoiding harassment in mixed-sex herds. In this situation, a male's ability to maintain the cohesion of his harem may be the principal cause of variation in mating success between males.  
  Address Department of Zoology, University of Cambridge, U.K  
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  ISSN 0962-8452 ISBN Medium  
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  Notes PMID:8153135 Approved no  
  Call Number Serial 1823  
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Author Witter, M.S.; Swaddle, J.P. doi  openurl
  Title Fluctuating Asymmetries, Competition and Dominance Type Journal Article
  Year 1994 Publication Proceedings of the Royal Society B: Biological Sciences Abbreviated Journal (up) Proc. Roy. Soc. Lond. B Biol. Sci.  
  Volume 256 Issue 1347 Pages 299-303  
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  Abstract Levels of fluctuating asymmetry (FA) in the primary feathers of European starlings, Sturnus vulgaris, have been shown to be sensitive to nutritional and energetic stress. Furthermore, between-individual variation in plumage FA has been found to be related to social dominance, even without social interactions during feather growth, with dominant birds exhibiting the highest levels of FA. Here we examine whether the relation between dominance and FA differs when birds are housed in social groups, under different degrees of competition for food, during moult. We reason that dominants should derive a greater benefit from their social status as competition for food increases. Our results support this proposition. The relation between dominance and FA differed significantly according to the degree of competition for food. However, in no cases did the dominants exhibit lower levels of FA than subdominants. When competition for food was low, dominants had higher levels of FA than subdominants. When competition for food was high, there was no systematic relation between dominance and FA. These results suggest that dominants may only derive a net benefit from their social status, under the circumstances of our experiment, during severe conditions of competition.  
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  Call Number Equine Behaviour @ team @ Serial 2203  
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Author Chiba, K.; Ikai, A.; Kawamura-Konishi, Y.; Kihara, H. doi  openurl
  Title Kinetic study on myoglobin refolding monitored by five optical probe stopped-flow methods Type Journal Article
  Year 1994 Publication Proteins Abbreviated Journal (up) Proteins  
  Volume 19 Issue 2 Pages 110-119  
  Keywords Animals; Chromatography, Gel; Circular Dichroism; Horses; Kinetics; Metmyoglobin/analogs & derivatives/chemistry; Myoglobin/*chemistry; *Protein Folding; Spectrometry, Fluorescence; Spectrophotometry, Ultraviolet; Urea  
  Abstract The refolding kinetics of horse cyanometmyoglobin induced by concentration jump of urea was investigated by five optical probe stopped-flow methods: absorption at 422 nm, tryptophyl fluorescence at around 340 nm, circular dichroism (CD) at 222 nm, CD at 260 nm, and CD at 422 nm. In the refolding process, we detected three phases with rate constants of > 1 x 10(2) s-1, (4.5-9.3) s-1, and (2-5) x 10(-3) s-1. In the fastest phase, a substantial amount of secondary structure (approximately 40%) is formed within the dead time of the CD stopped-flow apparatus (10.7 ms). The kinetic intermediate populated in the fastest phase is shown to capture a hemindicyanide, suggesting that a “heme pocket precursor” recognized by hemindicyanide must be constructed within the dead time. In the middle phase, most of secondary and tertiary structures, especially around the captured hemindicyanide, have been constructed. In the slowest phase, we detected a minor structural rearrangement accompanying the ligand-exchange reaction in the fifth coordination of ferric iron. We present a possible model for the refolding process of myoglobin in the presence of the heme group.  
  Address Laboratory of Biodynamics, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology, Kanagawa, Japan  
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  ISSN 0887-3585 ISBN Medium  
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  Notes PMID:8090705 Approved no  
  Call Number Equine Behaviour @ team @ Serial 3799  
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Author Feh, C .; BOLDSUKH, T.; TOURENQ, C. openurl 
  Title Are family groups in equids a response to cooperative hunting by predators? The case of Mongolian Kulans (Equus hemionus luteus Matschie) Type Journal Article
  Year 1994 Publication Revue d´ écologie (Terre et Vie) Abbreviated Journal (up) Rev Ecol (Terre Vie)  
  Volume 49 Issue Pages 11-20  
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  Notes Approved no  
  Call Number Serial 1083  
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