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Author Lynch, J.J.; Hinch, G.N.; Bouissou, M.F.; Elwin, R.L.; Green, G.C.; Davies, H.I. url  openurl
  Title Social organization in young Merino and Merino x Border Leicester ewes Type Journal Article
  Year 1989 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 22 Issue 1 Pages 49-63  
  Keywords  
  Abstract The social behaviour of two groups of Merino ewes and one group of Merino x Border Leicester ewes was studied. Each group comprised eight sheep, 15 months of age and, within each group, the animals were of similar liveweight. Dominance rankings were established at each test, but there was little consistency in ewe rank over time. Similarly, little consistency was found in ewe ranking for movement order between pens, and for exploratory and fear test rankings. However, with tests on movement orders, some consistency in the sheep which ranked first was shown. In the field, no aggression was seen while sheep were grazing and there were no occasions when ranking related to movement could be observed. There were short-term associations between pairs of sheep, but these occurred in less than half the individuals. Although the spatial distribution was not studied, the lack of long-term association between pairs would suggest that strong spatial preference does not occur. It is concluded that the social organization of single-age Merino and Merino x Border Leicester ewes is not based on dominance or leadership ranking nor on long-term associations between individuals.  
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  Notes (up) Approved no  
  Call Number Equine Behaviour @ team @ room B 3.029 Serial 2036  
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Author Crowell-Davis, S.L.; Caudle, A.B. url  doi
openurl 
  Title Coprophagy by foals: recognition of maternal feces Type Journal Article
  Year 1989 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 24 Issue 3 Pages 267-272  
  Keywords  
  Abstract Six foals were each observed for 4 h per week during the first 6 weeks of life in an experimental situation in which they had access to feces taken from their mother and from another mare which was not pregnant or lactating. The foals sniffed at the feces equally. Two foals engaged in a total of seven bouts of coprophagy. All bouts of coprophagy involved maternal feces (χ2; P<0.01).  
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  Notes (up) Approved no  
  Call Number Equine Behaviour @ team @ Serial 2273  
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Author Rubenstein, D.I.; Hohmann, M.E doi  openurl
  Title Parasites and Social Behavior of Island Feral Horses Type Journal Article
  Year 1989 Publication Oikos Abbreviated Journal Oikos  
  Volume 3 Issue Pages 312-320  
  Keywords  
  Abstract The horses of Shackelford Banks, North Carolina, USA, are heavily parasitized by intestinal worms and harassed by dipterans, and although both types influence behavior only internal parasites affect bodily condition and the structuring of horse society. Thirteen species of internal parasites were identified, but only 4 of 13 groups contain them all and even within groups differences among individuals are large. Among individuals ova emissions vary ranging from 50 to 76,875 eggs per gram. The most important environmental factors influencing egg production are season and a group's location on the island, presumably because of salinity and soil differences and their effects on ova survival. Of the social and life history factors, age, and group size, but neither reproductive state nor dominance status are important. The fitness consequences of internal parasitism may be large since the number emitted is negatively correlated with next year's bodily condition. Biting fly burdens are also affected by a variety of environmental factors. In general, horses are covered with more flies on sunny days, when winds are moderately brisk, when occupying dunes, and around mid-day. In contrast to endoparasites, fly burden is affected by reproductive condition and dominance status and tends to decrease as groups increase in size. Since groups do not grow very large, nor do females attempt to bring groups together, the negative effects of endoparasites appear to overide those associated with ectoparasites. Consequently, endoparasites appear to exert a stronger influence on social structure, even though ectoparasites seem to play a stronger role in shaping details of behavior.  
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  Notes (up) Approved no  
  Call Number Equine Behaviour @ team @ Serial 2360  
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Author de Waal, F. B. isbn  openurl
  Title Dominance “style” and primate social organization. Type Book Chapter
  Year 1989 Publication Comparative Socioecology Abbreviated Journal  
  Volume Issue Pages 243-263  
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  Publisher Blackwell Science Place of Publication Editor Standen, V.; Foley, R. A.  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN 978-0632023615 Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number refbase @ user @ Serial 2864  
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Author Gallistel, C.R. url  doi
openurl 
  Title Animal Cognition: The Representation of Space, Time and Number Type Journal Article
  Year 1989 Publication Annual Review of Psychology Abbreviated Journal  
  Volume 40 Issue 1 Pages 155-189  
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  Notes (up) Approved no  
  Call Number Equine Behaviour @ team @ Serial 2972  
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Author Fragaszy, D.M.; Visalberghi E. doi  openurl
  Title Social influences on the acquisition of tool-using behaviors in tufted capuchin monkeys (Cebus apella) Type Journal Article
  Year 1989 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.  
  Volume 103 Issue 2 Pages 159-170  
  Keywords  
  Abstract To identify behaviors related to acquisition of tool-use in tufted capuchins (Cebus apella), we presented two tool-using tasks to two groups, extending findings by Westergaard and Fragaszy (1987) and Visalberghi (in press). Five Ss learned to use the tools in each task. The primary predictor of success was level of interest in the task. Observation of others at the apparatus did not facilitate exploratory behaviors or contact with the tools in the observers. Most animals performed exploratory behaviors more often when they were at the apparatus alone than when with another, whether or not the other was using a tool. Observers were quick to learn the relationship between another's activities and the appearance of food. We conclude that capuchins do not readily learn about instrumental relations by observation of others or imitate other's acts. Imitation probably plays no role in the spread of novel instrumental behaviors among monkeys. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  
  Address social influences, acquisition of tool using  
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  Notes (up) Approved no  
  Call Number Equine Behaviour @ team @ Serial 2993  
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Author Visalberghi E; Trinca L doi  openurl
  Title Tool use in capuchin monkeys: distinguishing between performing and understanding Type Journal Article
  Year 1989 Publication Primates Abbreviated Journal Primates  
  Volume 30 Issue Pages 511  
  Keywords Tool use – Cebus apella – Mental representation  
  Abstract A horizontal plexiglas tube containing a food-reward was presented to four naive tufted capuchins and suitable sticks were provided to push the reward out. Three monkeys out of four spontaneously used the tools and showed very different styles of solving the task. In more complex conditions, in which the sticks needed to be combined or actively modified in order to become effective, the monkeys were always successful; however, their performance was loaded with errors which did not disappear throughout the trials. Evidence of a difference between success in solving the problem and its understanding was found. This suggests that although capuchins can discover new means through active experimentation, they do not mentally represent the characteristics necessary for a tool to be effective, nor do they modify the tool appropriately beforehand. At this level, a major difference with chimpanzees emerges.  
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  Notes (up) Approved no  
  Call Number Equine Behaviour @ team @ Serial 3047  
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Author McCall, C.A. url  openurl
  Title The effect of body condition of horses on discrimination learning abilities Type Journal Article
  Year 1989 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 22 Issue 3-4 Pages 327-334  
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  Abstract Discriminative learning abilities were studied in 12 mature, malnourished horses. All horses initially received a condition score (CS) between 2 and 4 on a scale of 1 (poor) to 9 (extremely fat). Then horses were assigned to one of 3 treatments based on their eventual, rehabilitated CS during discrimination testing: thin, CS 1-3; moderate, CS 4-6; and fat, CS 7-9. The discrimination learning task was performed for 14 days with a maximum of 20 trials per day. Daily criterion was set at eight consecutively correct trails. Total trials to first criteria and total errors during testing were recorded. Analysis of variance showed that treatments did not differ (P>0.05) in total trials to first criterion, however horses on the fat treatment did have higher total error scores (P<0.05) than horses on the thin or moderate treatments. This difference was probably owing to lack of motivation in the fat treatment horses, rather than to true learning ability differences. The sex of the horse did not significantly affect either learning score.  
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  Notes (up) Approved no  
  Call Number Equine Behaviour @ team @ Serial 3570  
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Author Valone, T.J. openurl 
  Title Group foraging, public information, and patch estimation Type Journal Article
  Year 1989 Publication Oikos Abbreviated Journal Oikos  
  Volume 56 Issue 3 Pages 357-363  
  Keywords Techniques; Mathematical techniques; Nutrition; Feeding behaviour; Behaviour; Social behaviour^, Comprehensive Zoology; Mathematical model; Resource patch estimation by group members; use of public information; Foraging; Group behaviour  
  Abstract Public information is information about the quality of a patch that can be obtained by observing the foraging success of other individuals in that patch. I examine the influence of the use of public information on patch departure and foraging efficiency of group members. When groups depart a patch with the first individual to leave, the use of public information can prevent the underutilization of resource patches.  
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  Notes (up) Approved no  
  Call Number Equine Behaviour @ team @ Serial 4274  
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Author McCullough, P.; Nelder, J.A. isbn  openurl
  Title Generalized linear models. Type Book Whole
  Year 1989 Publication Abbreviated Journal  
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  Abstract Book Description

The success of the first edition of Generalized Linear Models led to the updated Second Edition, which continues to provide a definitive unified, treatment of methods for the analysis of diverse types of data. Today, it remains popular for its clarity, richness of content and direct relevance to agricultural, biological, health, engineering, and other applications. The authors focus on examining the way a response variable depends on a combination of explanatory variables, treatment, and classification variables. They give particular emphasis to the important case where the dependence occurs through some unknown, linear combination of the explanatory variables. The Second Edition includes topics added to the core of the first edition, including conditional and marginal likelihood methods, estimating equations, and models for dispersion effects and components of dispersion. The discussion of other topics-log-linear and related models, log odds-ratio regression models, multinomial response models, inverse linear and related models, quasi-likelihood functions, and model checking-was expanded and incorporates significant revisions. Comprehension of the material requires simply a knowledge of matrix theory and the basic ideas of probability theory, but for the most part, the book is self-contained. Therefore, with its worked examples, plentiful exercises, and topics of direct use to researchers in many disciplines, Generalized Linear Models serves as ideal text, self-study guide, and reference.
 
  Address  
  Corporate Author Thesis  
  Publisher Chapman & Hall Place of Publication New York Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition 2  
  ISSN ISBN 978-0412317606 Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number Equine Behaviour @ team @ Serial 4370  
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