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Author Dubois, F.; Giraldeau, L.-A.; Hamilton, I.M.; Grant, J.W.A.; Lefebvre, L. doi  openurl
  Title Distraction sneakers decrease the expected level of aggression within groups: a game-theoretic model Type Journal Article
  Year 2004 Publication The American Naturalist Abbreviated Journal Am Nat  
  Volume (down) 164 Issue 2 Pages E32-45  
  Keywords *Aggression; Animals; Behavior, Animal/*physiology; Columbidae/*physiology; Competitive Behavior; Cooperative Behavior; *Game Theory; Hawks/*physiology; Models, Biological  
  Abstract Hawk-dove games have been extensively used to predict the conditions under which group-living animals should defend their resources against potential usurpers. Typically, game-theoretic models on aggression consider that resource defense may entail energetic and injury costs. However, intruders may also take advantage of owners who are busy fighting to sneak access to unguarded resources, imposing thereby an additional cost on the use of the escalated hawk strategy. In this article we modify the two-strategy hawk-dove game into a three-strategy hawk-dove-sneaker game that incorporates a distraction-sneaking tactic, allowing us to explore its consequences on the expected level of aggression within groups. Our model predicts a lower proportion of hawks and hence lower frequencies of aggressive interactions within groups than do previous two-strategy hawk-dove games. The extent to which distraction sneakers decrease the frequency of aggression within groups, however, depends on whether they search only for opportunities to join resources uncovered by other group members or for both unchallenged resources and opportunities to usurp.  
  Address Departement des Sciences Biologiques, Universite du Quebec a Montreal, Case postale 8888 Succursale Centre-Ville, Montreal, Quebec H3C 3P8, Canada. frede_dubois@yahoo.fr  
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  ISSN 1537-5323 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:15278850 Approved no  
  Call Number Serial 2130  
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Author Robinson, H.C. openurl 
  Title Equine interspecies aggression Type
  Year 2007 Publication The Veterinary record Abbreviated Journal Vet. Rec.  
  Volume (down) 160 Issue 7 Pages 244  
  Keywords *Aggression; Animals; Behavior, Animal; Equidae; Horses/*physiology/*psychology  
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  ISSN 0042-4900 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:17308028 Approved no  
  Call Number Serial 1773  
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Author Huxley, J. openurl 
  Title Equine interspecies aggression Type
  Year 2006 Publication The Veterinary record Abbreviated Journal Vet. Rec.  
  Volume (down) 159 Issue 25 Pages 860  
  Keywords *Aggression; Animals; *Behavior, Animal; Horses; Male; Sheep  
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  ISSN 0042-4900 ISBN Medium  
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  Notes PMID:17172489 Approved no  
  Call Number Serial 1776  
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Author Burden, F.; Trawford, A. openurl 
  Title Equine interspecies aggression Comment on Type
  Year 2006 Publication The Veterinary record Abbreviated Journal Vet. Rec.  
  Volume (down) 159 Issue 25 Pages 859-860  
  Keywords *Aggression; Animals; *Behavior, Animal; Cats; Dogs; Equidae  
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  ISSN 0042-4900 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:17172484 Approved no  
  Call Number Serial 1777  
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Author Macholc, E.J.A. openurl 
  Title Equine interspecies aggression Type
  Year 2006 Publication The Veterinary record Abbreviated Journal Vet. Rec.  
  Volume (down) 159 Issue 24 Pages 824  
  Keywords *Aggression; Animals; *Behavior, Animal; Chickens; Ducks; *Horses; Species Specificity  
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  ISSN 0042-4900 ISBN Medium  
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  Notes PMID:17158722 Approved no  
  Call Number Serial 1778  
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Author Giles, N.; Tupper, J. doi  openurl
  Title Equine interspecies aggression Type
  Year 2006 Publication The Veterinary record Abbreviated Journal Vet. Rec.  
  Volume (down) 159 Issue 22 Pages 756  
  Keywords Aggression/*physiology; Animals; Horses/*physiology; Sheep/*physiology; Social Dominance  
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  ISSN 0042-4900 ISBN Medium  
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  Notes PMID:17127768 Approved no  
  Call Number Serial 1779  
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Author Hinde, R.A. openurl 
  Title Analyzing the roles of the partners in a behavioral interaction--mother-infant relations in rhesus macaques Type Journal Article
  Year 1969 Publication Annals of the New York Academy of Sciences Abbreviated Journal Ann N Y Acad Sci  
  Volume (down) 159 Issue 3 Pages 651-667  
  Keywords Age Factors; Animals; *Behavior, Animal; Female; Group Processes; Haplorhini; Leadership; Maternal Deprivation; *Mother-Child Relations; *Role; Time Factors  
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  ISSN 0077-8923 ISBN Medium  
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  Notes PMID:4981882 Approved no  
  Call Number Serial 2054  
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Author Landman, M.A.A.M.; de Blaauw, J.A.; van Weeren, P.R.; Hofland, L.J. openurl 
  Title Field study of the prevalence of lameness in horses with back problems Type Journal Article
  Year 2004 Publication The Veterinary Record Abbreviated Journal Vet. Rec.  
  Volume (down) 155 Issue 6 Pages 165-168  
  Keywords Animals; Back Pain/epidemiology/*veterinary; Case-Control Studies; Horse Diseases/*epidemiology/etiology; Horses; Lameness, Animal/epidemiology; Netherlands/epidemiology; Osteoarthritis/epidemiology/*veterinary; Prevalence; Records/veterinary; Retrospective Studies  
  Abstract A population of 805 horses (70 per cent dressage, 20 per cent show jumpers and 10 per cent trotters) with orthopaedic problems was examined for signs of lameness and back problems, irrespective of their original complaints. In the horses with a back problem the prevalence of lameness was 74 per cent, and back problems were diagnosed in 32 per cent of the lame horses. These percentages were significantly higher than those recorded in a control population of 399 horses, of which 20 per cent were lame and 12 per cent had back problems. In the group of horses with orthopaedic problems there was a strong association between lameness and back problems and, in particular, there was a high prevalence of lameness among the horses with back problems.  
  Address Bodegraven Equine Clinic, Zuidzijde 63, NL-2411 RT Bodegraven, The Netherlands  
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  ISSN 0042-4900 ISBN Medium  
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  Notes PMID:15357376 Approved no  
  Call Number Equine Behaviour @ team @ Serial 3717  
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Author Amici, F.; Widdig, A.; Lehmann, J.; Majolo, B. url  doi
openurl 
  Title A meta-analysis of interindividual differences in innovation Type Journal Article
  Year 2019 Publication Animal Behaviour Abbreviated Journal Anim. Behav.  
  Volume (down) 155 Issue Pages 257-268  
  Keywords age; bad competitor hypothesis; excess of energy hypothesis; innovation; interindividual differences; intraspecific variation; personality; rank; sex  
  Abstract The ability to innovate and the social transmission of innovations have played a central role in human evolution. However, innovation is also crucial for other animals, by allowing them to cope with novel socioecological challenges. Although innovation plays such a central role in animals' lives, we still do not know the conditions required for innovative behaviour to emerge. Here, we focused on interindividual differences in innovation by (1) extensively reviewing existing literature on innovative behaviour in animals and (2) quantitatively testing the different evolutionary hypotheses that have been proposed to explain interindividual variation in innovation propensity during foraging tasks. We ran a series of phylogenetically controlled mixed-effects meta-regression models to determine which hypotheses (if any) are supported by currently available empirical studies. Our analyses show that innovation is more common in individuals that are older and belong to the larger sex, but also in more neophilic and/or explorative individuals. Moreover, these effects change depending on the study setting (i.e. wild versus captive). Our results provide no clear support to the excess of energy or the bad competitor hypotheses and suggest that study setting and interindividual differences in traits related to personality are also important predictors of innovation.  
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  ISSN 0003-3472 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 6589  
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Author Blazyczek, I.; Hamann, H.; Deegen, E.; Distl, O.; Ohnesorge, B. openurl 
  Title Retrospective analysis of 50 cases of guttural pouch tympany in foals Type Journal Article
  Year 2004 Publication The Veterinary Record Abbreviated Journal Vet. Rec.  
  Volume (down) 154 Issue 9 Pages 261-264  
  Keywords Animals; Female; Germany/epidemiology; Horse Diseases/*surgery; Horses; Male; Pharyngeal Diseases/epidemiology/surgery/*veterinary; Retrospective Studies; Severity of Illness Index; Species Specificity  
  Abstract Between 1994 and 2001, guttural pouch tympany was diagnosed in 51 foals; there were approximately three times as many fillies as colts, of Arabian, different German warmblood breeds and Western horse breeds. There were significantly more Arabian and paint horse foals than expected in comparison with the breed distribution of the foals hospitalised at the Clinic for Horses. The foals' breed and sex did not influence the age of onset, the type and severity of the clinical signs or the recurrence rate. A surgical laser technique was used on 50 of the foals; in 35 cases only one surgical treatment was necessary, in seven cases a second operation was required during the foal's initial period of hospitalisation, and in eight cases a second operation was performed during a second period of hospitalisation. Long-term follow-up information was obtained for 44 of the 50 treated horses; 24 of them were under two years of age and 20 were over two years of age. In six horses, no follow-up information was available. Four horses were euthanased for reasons unrelated to the condition or its treatment. The horses over two years of age were in training or were being used for competitions in dressage or jumping or for breeding purposes, and in only one of them was an adventitious respiratory noise reported. All the horses up to two years of age were reported to be healthy.  
  Address Institute of Animal Breeding and Genetics, School of Veterinary Medicine Hannover, Buenteweg 17p, D-30559 Hannover, Germany  
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  ISSN 0042-4900 ISBN Medium  
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  Notes PMID:15029964 Approved no  
  Call Number Equine Behaviour @ team @ Serial 3719  
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