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Author (up) Clark, T.B.; Peterson, B.V.; Whitcomb, R.F.; Henegar, R.B.; Hackett, K.J.; Tully, J.G. openurl 
  Title Spiroplasmas in the Tabanidae Type Journal Article
  Year 1984 Publication Israel Journal of Medical Sciences Abbreviated Journal Isr J Med Sci  
  Volume 20 Issue 10 Pages 1002-1005  
  Keywords Animals; Diptera/*microbiology/ultrastructure; Ecology; Female; Hemolymph/microbiology; Male; Maryland; North Carolina; Plants/microbiology; Spiroplasma/classification/*isolation & purification/physiology  
  Abstract Spiroplasmas were observed in seven species of the family Tabanidae (horse flies and deer flies). This is the fifth family of the order Diptera now known to harbor spiroplasmas. Noncultivable spiroplasmas were seen in the hemolymph of three species of the genus Tabanus, and cultivable forms were isolated from the guts of six species in three genera. Isolates from T. calens and T. sulcifrons were serologically similar and closely related to a spiroplasma in the lampyrid beetle, Ellychnia corrusca. These three isolates represent a new serogroup. Isolates from Hybomitra lasiophthalma were related to Group IV strains, while those from T. nigrovittatus and Chrysops sp. both represented new serogroups. At least some tabanids probably acquire spiroplasmas from contaminated flower surfaces. The possibility of vertebrate reservoirs for some tabanid spiroplasmas remains an open question.  
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  ISSN 0021-2180 ISBN Medium  
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  Notes PMID:6511308 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2687  
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Author (up) Clarke, J.V.; Nicol, C.J.; Jones, R.; McGreevy, P.D. url  doi
openurl 
  Title Effects of observational learning on food selection in horses Type Journal Article
  Year 1996 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 50 Issue 2 Pages 177-184  
  Keywords Horse; Observational learning; Food discrimination  
  Abstract Fourteen riding horses of mixed age and breed were randomly allocated to observer and control treatments. An additional horse was pre-trained as a demonstrator to walk the 13.8 m length of the test arena and select one of two food buckets using colour and pattern cues. Observer horses were exposed to correct performances of the task by the trained demonstrator, for 20 trials held over 2 days. Control horses were subjected to the same handling and placement procedures as the observer horses but without exposure to the behaviour of the demonstrator. The third day for all subjects was designated as a test day. Each subject was released individually in a predetermined place in the arena, and the latency to walk the length of the test arena to the food buckets, the latency to feed, the identity of the bucket approached and the identity of the bucket selected were recorded on ten consecutive trials. During tests both food buckets contained food to minimize the possibility of individual trial and error learning. On the first trial the mean latency to approach the goal area was 18 s for observer horses, compared with 119 s for control horses (t = 2.8, d.f. = 12, P < 0.01) and the mean latency to eat was 35 s for observer horses, compared with 181 s for control horses (t = 4.86, d.f. = 11, P < 0.001). However, observer horses were no more likely to choose the demonstrated bucket than control horses on the first trial. Twelve of the 14 horses decreased their latency to approach the goal area during the series of ten trials, but there were no significant changes in the buckets selected.  
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  Notes Approved no  
  Call Number refbase @ user @ Serial 563  
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Author (up) Clayton NS; Dickinson A openurl 
  Title Rational rats Type Journal Article
  Year 2006 Publication Science Abbreviated Journal Science  
  Volume 9 Issue Pages 472  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 3061  
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Author (up) Clayton, N.S. url  openurl
  Title COGNITION: An Open Sandwich or an Open Question? Type Journal Article
  Year 2004 Publication Science Abbreviated Journal Science  
  Volume 305 Issue 5682 Pages 344-  
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  Notes 10.1126/science.1099512 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2955  
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Author (up) Clegg, H.A.; Buckley, P.; Friend, M.A.; McGreevy, P.D. url  doi
openurl 
  Title The ethological and physiological characteristics of cribbing and weaving horses Type Journal Article
  Year 2008 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 109 Issue 1 Pages 68-76  
  Keywords Horse; Stereotypy; Digestion; Gut transit; Stress  
  Abstract Data were gathered on the behavioural and physiological characteristics of five cribbers, six weavers and six non-stereotypic (control) mature Thoroughbred geldings for a period of 16 weeks. The horses were hired from their owners and stabled individually throughout the trial. Cribbers and weavers had been known to stereotype for at least 12 months prior to commencement of the study. Behavioural data were collected using video surveillance. Cribbers stereotyped most frequently (P < 0.001) in the period 2-8 h following delivery of concentrated food, reinforcing the suggestion that diet is implicated in cribbing behaviour. Weavers stereotyped most frequently (P < 0.001) during periods of high environmental activity such as during routine pre-feeding activities and in the hour prior to daily turnout, presumably when anticipation and stimulation were at their highest levels. Cribbers and weavers took longer than control horses to fully consume their ration, suggesting possible differences in motivation to feed, distress levels, satiety mechanisms or abdominal discomfort. Physiological data were collected throughout the trial and there were no differences in oro-caecal transit time, digestibility, plasma cortisol concentration or heart rate among the three behavioural groups.  
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  ISSN 0168-1591 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 4768  
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Author (up) Clement, T.S.; Zentall, T.R. openurl 
  Title Development of a single-code/default coding strategy in pigeons Type Journal Article
  Year 2000 Publication Psychological science : a journal of the American Psychological Society / APS Abbreviated Journal Psychol Sci  
  Volume 11 Issue 3 Pages 261-264  
  Keywords Animals; Attention; Columbidae; *Discrimination Learning; Female; Male; *Pattern Recognition, Visual; *Problem Solving; Retention (Psychology)  
  Abstract We tested the hypothesis that pigeons could use a cognitively efficient coding strategy by training them on a conditional discrimination (delayed symbolic matching) in which one alternative was correct following the presentation of one sample (one-to-one), whereas the other alternative was correct following the presentation of any one of four other samples (many-to-one). When retention intervals of different durations were inserted between the offset of the sample and the onset of the choice stimuli, divergent retention functions were found. With increasing retention interval, matching accuracy on trials involving any of the many-to-one samples was increasingly better than matching accuracy on trials involving the one-to-one sample. Furthermore, following this test, pigeons treated a novel sample as if it had been one of the many-to-one samples. The data suggest that rather than learning each of the five sample-comparison associations independently, the pigeons developed a cognitively efficient single-code/default coding strategy.  
  Address Department of Psychology, University of Kentucky, Lexington, KY 40506, USA  
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  ISSN 0956-7976 ISBN Medium  
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  Notes PMID:11273414 Approved no  
  Call Number refbase @ user @ Serial 246  
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Author (up) Cloutier, S.; Newberry, R.C. url  doi
openurl 
  Title Differences in skeletal and ornamental traits between laying hen cannibals, victims and bystanders Type Journal Article
  Year 2002 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 77 Issue 2 Pages 115-126  
  Keywords Domestic fowl; Asymmetry; Skeletal traits; Comb size; Cannibalism  
  Abstract We compared the size of skeletal and ornamental traits, and asymmetries in bilateral skeletal traits, between victims of cannibalism, cannibals and bystanders within small groups of caged female White Leghorns at the time of cannibalistic attacks (i.e. injurious pecks resulting in bleeding). We hypothesised that victims of cannibalism have discernible morphological traits that predispose them to cannibalistic attack. We predicted that victims would have smaller skeletal traits (body length, ulna length, metatarsus length and width, toe length), lower body weight, poorer body condition, smaller combs and more asymmetrical bilateral skeletal traits than their flock mates. Contrary to our prediction, victims of cannibalistic attacks to the head/neck area (N=23) tended to have larger combs than their flock mates (Wilcoxon matched-pairs signed-ranks test, S=59, P=0.037, NS after sequential Bonferroni adjustment). Their cannibals were more asymmetrical than non-cannibalistic bystanders (metatarsus length, S=48, P=0.011 and composite asymmetry, S=62.5, P=0.002, significant after sequential Bonferroni adjustment). In agreement with our prediction, victims of cannibalistic attacks to other body parts (N=27), including the back, wings, rump, tail, cloaca, abdomen and toes, were more asymmetrical (composite asymmetry, S=78, P=0.022, significant after sequential Bonferroni adjustment) and tended to have lower body weights (S=79.5, P=0.029, NS after sequential Bonferroni adjustment) than their flock mates. Their cannibals did not differ in skeletal or ornamental traits from the non-participating bystanders. The results suggest that large combs either elicit attacks to the head and neck area or increase vulnerability to injury during such attacks. Attacks to other body parts appear to be directed towards birds with signs of weakness relative to their flock mates. In these attacks, there were no distinguishing features separating cannibals from bystanders, suggesting that the bystanders could all be potential cannibals.  
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  Notes Approved no  
  Call Number Serial 2092  
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Author (up) Clutton-Brock, T.H.; Russell, A.F.; Sharpe, L.L.; Brotherton, P.N.; McIlrath, G.M.; White, S.; Cameron, E.Z. doi  openurl
  Title Effects of helpers on juvenile development and survival in meerkats Type Journal Article
  Year 2001 Publication Science (New York, N.Y.) Abbreviated Journal Science  
  Volume 293 Issue 5539 Pages 2446-2449  
  Keywords Animals; Breeding; Carnivora/growth & development/*physiology; *Cooperative Behavior; Feeding Behavior; Female; Male; Survival Rate; *Weight Gain  
  Abstract Although breeding success is known to increase with group size in several cooperative mammals, the mechanisms underlying these relationships are uncertain. We show that in wild groups of cooperative meerkats, Suricata suricatta, reductions in the ratio of helpers to pups depress the daily weight gain and growth of pups and the daily weight gain of helpers. Increases in the daily weight gain of pups are associated with heavier weights at independence and at 1 year of age, as well as with improved foraging success as juveniles and higher survival rates through the first year of life. These results suggest that the effects of helpers on the fitness of pups extend beyond weaning and that helpers may gain direct as well as indirect benefits by feeding pups.  
  Address Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK. thcb@hermes.cam.ac.uk  
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  ISSN 0036-8075 ISBN Medium  
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  Notes PMID:11577235 Approved no  
  Call Number refbase @ user @ Serial 414  
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Author (up) Cohen, J. doi  openurl
  Title Animal behavior. The world through a chimp's eyes Type
  Year 2007 Publication Science (New York, N.Y.) Abbreviated Journal Science  
  Volume 316 Issue 5821 Pages 44-45  
  Keywords Animal Communication; Animals; *Behavior, Animal; Cognition; Cooperative Behavior; Culture; Memory; Pan troglodytes/*psychology; Social Behavior; Tool Use Behavior  
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  Series Volume Series Issue Edition  
  ISSN 1095-9203 ISBN Medium  
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  Notes PMID:17412932 Approved no  
  Call Number Equine Behaviour @ team @ Serial 2832  
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Author (up) Cooper, J.J.; Albentosa, M.J. url  doi
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  Title Behavioural adaptation in the domestic horse: potential role of apparently abnormal responses including stereotypic behaviour Type Journal Article
  Year 2005 Publication Livestock Production Science Abbreviated Journal Livest. Prod. Sci.  
  Volume 92 Issue 2 Pages 177-182  
  Keywords Behavioural adaptation; Horse; Stereotypic behaviour  
  Abstract Classically, biologists have considered adaptation of behavioural characteristics in terms of long-term functional benefits to the individual, such as survival or reproductive fitness. In captive species, including the domestic horse, this level of explanation is limited, as for the most part, horses are housed in conditions that differ markedly from those in which they evolved. In addition, an individual horse's reproductive fitness is largely determined by man rather than its own behavioural strategies. Perhaps for reasons of this kind, explanations of behavioural adaptation to environmental challenges by domestic animals, including the capacity to learn new responses to these challenges, tend to concentrate on the proximate causes of behaviour. However, understanding the original function of these adaptive responses can help us explain why animals perform apparently novel or functionless activities in certain housing conditions and may help us to appreciate what the animal welfare implications might be. This paper reviews the behavioural adaptation of the domestic horse to captivity and discusses how apparently abnormal behaviour may not only provide a useful practical indicator of specific environmental deficiencies but may also serve the animal as an adaptive response to these deficiencies in an “abnormal” environment.  
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  ISSN 0301-6226 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 4829  
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