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Author Walters, J.R.; Seyfarth, R.M. openurl 
  Title (up) Primate Societies Type Miscellaneous
  Year 1987 Publication Abbreviated Journal  
  Volume Issue Pages  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 4858  
Permanent link to this record
 

 
Author Berger J, openurl 
  Title (up) Reproductive fates of dispersers in a harem-dwelling ungulate: the wild horse Type Journal Article
  Year 1987 Publication Mammalian Dispersal Patterns: The Effects of Social Structure on Population Genetics Abbreviated Journal Mammalian dispersal Patterns  
  Volume Issue Pages 41-54  
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  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor Chepko-Sade, B.D. ; Halpin, Z.T.  
  Language Summary Language Original Title Mammalian Dispersal Patterns: The Effects of Social Structure on Population Genetics  
  Series Editor Series Title Abbreviated Series Title  
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  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 940  
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Author Giraldeau, L.-A.; Lefebvre, L. url  doi
openurl 
  Title (up) Scrounging prevents cultural transmission of food-finding behaviour in pigeons Type Journal Article
  Year 1987 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.  
  Volume 35 Issue 2 Pages 387-394  
  Keywords  
  Abstract Living in groups should promote the cultural transmission of a novel behaviour because opportunities for observing knowledgeable individuals are likely to be more numerous in this condition. However, in this study pigeons who shared the food discoveries of others (scroungers) did not learn the food-finding technique used by the discoverers (producers). Individually-caged pigeons prevented from scrounging easily learned the technique from a conspecific tutor. When caged pigeons obtained food from the tutor's performance, most naïve observers failed to learn. In a flock, scroungers selectively followed producers. In individual cages, scrounging during the tutor's demonstration was equivalent to getting no demonstration at all. This effect of scrounging did not interfere with subsequent acquisition of the food-finding behaviour when scrounging was no longer possible.  
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  Series Volume Series Issue Edition  
  ISSN 0003-3472 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5265  
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Author Crowell-Davis, S.L. url  doi
openurl 
  Title (up) Self-grooming by mares and foals of the Welsh pony (Equus caballus) Type Journal Article
  Year 1987 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 17 Issue 3-4 Pages 197-208  
  Keywords  
  Abstract Self-grooming behaviour of 15 mare-foal pairs was studied weekly for the first 24 weeks of the foal's life. Mares self-groomed at mean rates of 1.2-2.2 times h-1 depending on the 4-week period. Foals self-groomed more often, with a peak rate of 12.3 times h-1 occurring during Week 5-8 and a subsequent decline to 6.0 times h-1 by Weeks 21-24. Self-grooming bouts of mares and foals also differed in the proportion devoted to each type of self-grooming. During a greater proportion of their total self-grooming bouts, foals scratched their head and neck with a hind limb or bit and scratched the trunk or hind limbs with the teeth. The mares spent a greater proportion of their self-grooming bouts rubbing their head or neck on an inanimate object, another pony, or their fore limb, or rolling on the ground. Particular types of individual self-grooming bouts were engaged in for different lengths of time. Foals had longer bouts of scratching the head and neck with a hind limb, scratching or biting the fore limb or hind limb with the teeth, and rubbing the head and neck on an inanimate object, while mares had longer bouts of rolling. Some of the differences in preference for particular types of self-grooming may be the result of differences in relative size of various body parts and, consequently, relative ease of a given type of self-grooming.  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2275  
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Author Pusey, A.E. url  doi
openurl 
  Title (up) Sex-biased dispersal and inbreeding avoidance in birds and mammals Type Journal Article
  Year 1987 Publication Trends in Ecology & Evolution Abbreviated Journal Trends. Ecol. Evol  
  Volume 2 Issue 10 Pages 295-299  
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  Abstract Sex differences in dispersal distance are widespread in birds and mammals, but the predominantly dispersing sex differs consistently between the classes. There has been persistent debate over the relative importance of two factors -- intrasexual competition and inbreeding avoidance -- in producing sex-biased dispersal, and over the sources of the difference in dispersal patterns between the two classes. Recent studies cast new light on these questions.  
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  Series Volume Series Issue Edition  
  ISSN 0169-5347 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5326  
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Author Ginsberg, J.R. openurl 
  Title (up) Social behavior and mating strategies of an arid adapted equid: the Grevy's zebra. Type Manuscript
  Year 1987 Publication Abbreviated Journal  
  Volume Issue Pages  
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  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Prnceton Editor  
  Language Summary Language Original Title  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 2295  
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Author Glen-Leary J, openurl 
  Title (up) Stud book for zebras Type Journal Article
  Year 1987 Publication Abbreviated Journal Farmer's weekly  
  Volume Issue Pages  
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  Area Expedition Conference  
  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 1115  
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Author SUMMERS PM et al, openurl 
  Title (up) Sucessful transfer of the embryos of Przewalski's horses and Grant's zebra to domestic mares Type Journal Article
  Year 1987 Publication Abbreviated Journal J Reprod Fert  
  Volume 80 Issue Pages 13-20  
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  Notes from Professor Hans Klingels Equine Reference List Approved no  
  Call Number Serial 1638  
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Author Rumbaugh, D.M.; Savage-Rumbaugh, S.; Hegel, M.T. openurl 
  Title (up) Summation in the chimpanzee (Pan troglodytes) Type Journal Article
  Year 1987 Publication Journal of Experimental Psychology. Animal Behavior Processes Abbreviated Journal J Exp Psychol Anim Behav Process  
  Volume 13 Issue 2 Pages 107-115  
  Keywords Animals; Choice Behavior; *Cognition; Male; *Mathematics; *Pan troglodytes; Visual Perception  
  Abstract In this research, we asked whether 2 chimpanzee (Pan troglodytes) subjects could reliably sum across pairs of quantities to select the greater total. Subjects were allowed to choose between two trays of chocolates. Each tray contained two food wells. To select the tray containing the greater number of chocolates, it was necessary to sum the contents of the food wells on each tray. In experiments where food wells contained from zero to four chocolates, the chimpanzees chose the greater value of the summed wells on more than 90% of the trials. In the final experiment, the maximum number of chocolates assigned to a food well was increased to five. Choice of the tray containing the greater sum still remained above 90%. In all experiments, subjects reliably chose the greater sum, even though on many trials a food well on the “incorrect” tray held more chocolates than either single well on the “correct” tray. It was concluded that without any known ability to count, these chimpanzees used some process of summation to combine spatially separated quantities. Speculation regarding the basis for summation includes consideration of perceptual fusion of pairs of quantities and subitization.  
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  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0097-7403 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:3572305 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2785  
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Author Illius,A. W.; Gordon, I. J. doi  openurl
  Title (up) The Allometry of Food Intake in Grazing Ruminants Type Journal Article
  Year 1987 Publication The Journal of Animal Ecology Abbreviated Journal T. J. Anim. Ecol.  
  Volume 56 Issue 3 Pages 989-999  
  Keywords  
  Abstract A simulation model of grazing mechanics in ruminants shows that, due to the allometric relations of bite size and metabolic requirements to body size, small animals are able to subsist on shorter swards than large animals. (2) The density of nutrients in the grazed horizon of the modelled swards markedly affected the ability of animals of a given body size to satisfy their energy requirements. (3) By extension, the allometric relationships would be expected to apply in selective grazing and browsing species in their choice of food items of different size and nutrient content. (4) The results support the argument that sexual segregation and habitat choice of dimorphic species is an effect of scramble competition for limited resources, the males thus being excluded from mutually preferred swards. (5) The model provides an explanation for two interspecific phenomena amongst grazers: grazing succession and grazing facilitation.  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 4265  
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