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Author McDonnell, S.M. openurl 
  Title More on self-mutilative behavior in horses Type Journal Article
  Year 1993 Publication Journal of the American Veterinary Medical Association Abbreviated Journal J Am Vet Med Assoc  
  Volume 202 Issue 10 Pages 1545-1546  
  Keywords Animals; Female; Horses/*injuries/psychology; Male; *Self Mutilation  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0003-1488 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:8514553 Approved no  
  Call Number refbase @ user @ Serial 1943  
Permanent link to this record
 
 
Author Luescher, U.A. openurl 
  Title More on self-mutilative behavior in horses Type Journal Article
  Year 1993 Publication Journal of the American Veterinary Medical Association Abbreviated Journal J Am Vet Med Assoc  
  Volume 203 Issue 9 Pages 1252-1253  
  Keywords Animals; Female; Horses/*psychology; Male; *Self Mutilation  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0003-1488 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:8253611 Approved no  
  Call Number refbase @ user @ Serial 1942  
Permanent link to this record
 
 
Author Goldschmidt, T.; Bakker, T.C.M.; Feuth-de Bruijn, E. url  doi
openurl 
  Title Selective copying in mate choice of female sticklebacks Type Journal Article
  Year 1993 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.  
  Volume 45 Issue 3 Pages 541-547  
  Keywords  
  Abstract There is evidence that female three-spined sticklebacks, Gasterosteus aculeatus L., prefer to mate with males whose nests contain eggs rather than with males with empty nests. While there is consensus on this point, a dispute exists about whether this preference should be attributed to a direct effect of the eggs on the female's entering the nest or, alternatively, to a positive impact of the eggs on the courtship behaviour and breeding coloration of the male. In the field experiment reported here females strongly preferred nests with eggs over empty nests. Additionally, females were less likely to enter risky nests with eggs: nests that contained fewer eggs than one average clutch or more eggs than the average nest content of parental males in this population. However, in the field possible differences in male attractiveness were not controlled for. In supplementary laboratory experiments the effect on female choice of possible changes in male attractiveness (intensified courtship and coloration) as a result of the presence of eggs in the nest was tested. Other differences in male attractiveness as a result of differences in male quality (body size, breeding coloration before the test, territory quality and size) were controlled for. When females had no access to the nests, they showed no preference for males with eggs in their nests in simultaneous choice tests. These results, together with the earlier published data, make it likely that the preference of females for nests with eggs is partly a direct consequence of the eggs themselves. So female sticklebacks are influenced by the mate choice behaviour of other females, but remain selective as to the actual nest content.  
  Address  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1818  
Permanent link to this record
 
 
Author Shah Nv, openurl 
  Title Ecology of wild ass in Little Rann of Kutch Type Manuscript
  Year 1993 Publication Abbreviated Journal  
  Volume Issue Pages  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis Doctoral thesis  
  Publisher Place of Publication Baroda University, India. Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1587  
Permanent link to this record
 
 
Author Schuhmann K, openurl 
  Title Untersuchung zur Sozialstruktur des persischen Wildesels Type Manuscript
  Year 1993 Publication Abbreviated Journal  
  Volume Issue Pages  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis Doctoral thesis  
  Publisher Place of Publication Freiburg Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1578  
Permanent link to this record
 
 
Author RÖHRS, M.; EBINGER, P. openurl 
  Title Progressive und regressive Hirngrößenveränderungen bei Equiden Type Journal Article
  Year 1993 Publication Abbreviated Journal Z zool Syst Evolut forsch  
  Volume 31 Issue Pages 233-239  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes from Professor Hans Klingels Equine Reference List Approved yes  
  Call Number Serial 1513  
Permanent link to this record
 
 
Author Owren, M.J.; Dieter, J.A.; Seyfarth, R.M.; Cheney, D.L. doi  openurl
  Title Vocalizations of rhesus (Macaca mulatta) and Japanese (M. fuscata) macaques cross-fostered between species show evidence of only limited modification Type Journal Article
  Year 1993 Publication Developmental psychobiology Abbreviated Journal Dev Psychobiol  
  Volume 26 Issue 7 Pages 389-406  
  Keywords Animals; Animals, Newborn; Behavior, Animal; Discrimination Learning; Environment; Female; *Macaca; *Macaca mulatta; Male; Sound Spectrography; *Vocalization, Animal  
  Abstract Two rhesus and two Japanese macaque infants were cross-fostered between species in order to study the effects of auditory experience on vocal development. Both the cross-fostered and normally raised control subjects were observed over the first 2 years of life and their vocalizations were tape-recorded. We classified 8053 calls by ear, placed each call in one of six acoustic categories, and calculated the rates at which different call-types were used in different social contexts. Species differences were found in the use of “coo” and “gruff” vocalizations among control subjects. Japanese macaques invariably produced coos almost exclusively. In contrast, rhesus macaques produced a mixture of coos and gruffs and showed considerable interindividual variation in the relative use of one call type or the other. Cross-fostered Japanese macaques adhered to their species-typical behavior, rarely using gruffs. Cross-fostered rhesus subjects also exhibited species-typical behavior in many contexts, but in some situations produced coos and gruffs at rates that were intermediate between those shown by normally raised animals of the two species. This outcome suggests that environmentally mediated modification of vocal behavior may have occurred, but that the resulting changes were quite limited.  
  Address California Regional Primate Research Center, University of California, Davis  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0012-1630 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:8270122 Approved no  
  Call Number refbase @ user @ Serial 700  
Permanent link to this record
 
 
Author Chalmeau, R.; Gallo, A. url  doi
openurl 
  Title Social constraints determine what is learned in the chimpanzee Type Journal Article
  Year 1993 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 28 Issue 3 Pages 173-179  
  Keywords Operant conditioning; Social influence; Individual strategy; Chimpanzee  
  Abstract A group of six chimpanzees was placed in a social learning situation, without training. The learning task was an operant conditioning situation; that is, a subject had to pull two handles simultaneously to cause a piece of fruit to fall into the cage. Only three individuals acquired the operant behaviour. For the operant individuals, social influences on the expression of the learning task were then examined; the dominant chimpanzee during feeding had an inhibiting effect when close to the operant subjects. Depending on the subject, social factors may influence not only the specific expression of what is learnt, but also the nature of what is learnt. Chimpanzees appear to experience situations differently: they develop an individual problem-solving strategy according to their social relationships even if the experimental procedure is the same for all.  
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  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number refbase @ user @ Serial 569  
Permanent link to this record
 
 
Author SYLVAIN GAGNON,FRANCOISY. DORE openurl 
  Title Search behavior of dogs (Canis familiaris) in invisible displacement problems Type Journal Article
  Year 1993 Publication Animal Learning & Behavior Abbreviated Journal Anim Learn. & Behav.  
  Volume 21 Issue 3 Pages 246-254  
  Keywords  
  Abstract Gagnon and Dor (1992) showed that domestic dogs are able to solve a Piagetian object permanence

task called the invisible displacement problem. A toy is hidden in a container which is

moved behind a screen where the toy is removed and left. Dogs make more errors in these problems

than they do in visible displacement tests, in which the object is hidden directly behind

the target screen. In Experiment 1, we examinedcomponents ofthe standard procedure of invisible

displacements that may make encoding or retention of the hiding location more difficult than

it is in visible displacements. In Experiment 2, we compared dogs performances in visible and

invisible displacement problems when delays of 0, 10, and 20 sec were introduced between the

objects final disappearance and the subjects release. The results revealed that dogs poorer performance

in invisible displacement tests is related to the complex sequence of events that have

to be encoded or remembered as well as to a difficulty in representing the position change that

is signaled, but not directly perceived.		  
  Address  
  Corporate Author Thesis  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number refbase @ user @ Serial 538  
Permanent link to this record
 
 
Author Rutberg, A.T.; Keiper, R.R. url  doi
openurl 
  Title Proximate causes of natal dispersal in feral ponies: some sex differences Type Journal Article
  Year 1993 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.  
  Volume 46 Issue 5 Pages 969-975  
  Keywords  
  Abstract Abstract. Fifteen years of data on natal dispersal age and the context of dispersal for the feral ponies of Assateague Island, Maryland are presented. Ninety-seven per cent of males and 81% of females dispersed from their natal groups by 5 years of age. For animals that left their natal group, average age of dispersal was 20[middle dot]8 months for males and 24[middle dot]6 months for females. Male dispersal age was strongly and significantly correlated with number of peers in the natal group, and males dispersing with peers were significantly older than males dispersing without peers, suggesting that males delayed dispersal when peers were available for interaction. Female dispersal age was not influenced by number of peers, but was correlated with age of first reproduction. Factors not influencing dispersal age in either sex were presence of a younger sibling, maternal band transfers, and maternal age and dominance rank. The relatively high frequency of females failing to disperse from their natal groups is puzzling in light of data showing diminished fecundity in non-dispersing pony mares.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number refbase @ user @ Serial 518  
Permanent link to this record
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