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Author Bräuer, J.; Call, J.; Tomasello, M. url  doi
openurl 
  Title Visual perspective taking in dogs (Canis familiaris) in the presence of barriers Type Journal Article
  Year (up) 2004 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.  
  Volume 88 Issue 3-4 Pages 299-317  
  Keywords Dogs; Visual perspective taking; Metacognition  
  Abstract Previous studies have shown that dogs have developed a special sensitivity to the communicative signals and attentional states of humans. The aim of the current study was to further investigate what dogs know about the visual perception of humans and themselves. In the first two experiments we investigated whether dogs were sensitive to the properties of barriers as blocking the visual access of humans. We presented dogs with a situation in which a human forbade them to take a piece of food, but the type and orientation of the barrier allowed the dog to take the food undetected in some conditions. Dogs differentiated between effective and ineffective barriers, based on their orientation or the particular features of the barriers such as size or the presence of window. In the third study we investigated whether dogs know about what they themselves have seen. We presented subjects with two boxes and placed food in one of them. In the Seen condition the location of the food was shown to the dogs while in the Unseen condition dogs were prevented from seeing the destination of the food. Before selecting one of the boxes by pressing a lever, dogs had the opportunity to seek extra information regarding the contents of the boxes, which would be particularly useful in the condition in which they had not seen where the food was hidden. Dogs rarely used the opportunity to seek information about the contents of the box before making their choice in any condition. Therefore, we found no evidence suggesting that dogs have access to what they themselves have seen, which contrasts with the positive evidence about visual perspective taking in others from the first two experiments and previous studies.  
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  ISSN 0168-1591 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 4986  
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Author Griffiths,S. W.; Brockmark, S.; Höjesjö,J.; Johnsson,J. I. doi  openurl
  Title Coping with divided attention: the advantage of familiarity Type Journal Article
  Year (up) 2004 Publication Proceedings of the Royal Society B: Biological Sciences Abbreviated Journal Proc. Roy. Soc. Lond. B Biol. Sci.  
  Volume 271 Issue 1540 Pages 695-699  
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  Abstract The ability of an animal to perform a task successfully is limited by the amount of attention being simultaneously focused on other activities. One way in which individuals might reduce the cost of divided attention is by preferentially focusing on the most beneficial tasks. In territorial animals where aggression is lower among familiar individuals, the decision to associate preferentially with familiar conspecifics may therefore confer advantages by allowing attention to be switched from aggression to predator vigilance and feeding. Wild juvenile brown trout were used to test the prediction that familiar fishes respond more quickly than unfamiliar fishes to a simulated predator attack. Our results confirm this prediction by demonstrating that familiar trout respond 14% faster than unfamiliar individuals to a predator attack. The results also show that familiar fishes consume a greater number of food items, foraging at more than twice the rate of unfamiliar conspecifics. To the best of our knowledge, these results provide the first evidence that familiarity–biased association confers advantages through the immediate fitness benefits afforded by faster predator–evasion responses and the long–term benefits provided by increased feeding opportunities.  
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  Notes 10.1098/rspb.2003.2648 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5007  
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Author Bugnyar, T.; Stöwe, M.; Heinrich, B. doi  openurl
  Title Ravens, Corvus corax, follow gaze direction of humans around obstacles Type Journal Article
  Year (up) 2004 Publication Proceedings of the Royal Society B: Biological Sciences Abbreviated Journal Proc. Roy. Soc. Lond. B Biol. Sci.  
  Volume 271 Issue 1546 Pages 1331-1336  
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  Abstract The ability to follow gaze (i.e. head and eye direction) has recently been shown for social mammals, particularly primates. In most studies, individuals could use gaze direction as a behavioural cue without understanding that the view of others may be different from their own. Here, we show that hand–raised ravens not only visually co–orient with the look–ups of a human experimenter but also reposition themselves to follow the experimenter's gaze around a visual barrier. Birds were capable of visual co–orientation already as fledglings but consistently tracked gaze direction behind obstacles not before six months of age. These results raise the possibility that sub–adult and adult ravens can project a line of sight for the other person into the distance. To what extent ravens may attribute mental significance to the visual behaviour of others is discussed.  
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  Notes 10.1098/rspb.2004.2738 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5009  
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Author Milo, R.; Itzkovitz, S.; Kashtan, N.; Levitt, R.; Alon, U. doi  openurl
  Title Response to Comment on “Network Motifs: Simple Building Blocks of Complex Networks” and “Superfamilies of Evolved and Designed Networks” Type Journal Article
  Year (up) 2004 Publication Science Abbreviated Journal Science  
  Volume 305 Issue 5687 Pages 1107d  
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  Notes 10.1126/science.1100519 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5031  
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Author Milo, R.; Itzkovitz, S.; Kashtan, N.; Levitt, R.; Shen-Orr, S.; Ayzenshtat, I.; Sheffer, M.; Alon, U. url  doi
openurl 
  Title Superfamilies of Evolved and Designed Networks Type Journal Article
  Year (up) 2004 Publication Science Abbreviated Journal Science  
  Volume 303 Issue 5663 Pages 1538-1542  
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  Abstract Complex biological, technological, and sociological networks can be of very different sizes and connectivities, making it difficult to compare their structures. Here we present an approach to systematically study similarity in the local structure of networks, based on the significance profile (SP) of small subgraphs in the network compared to randomized networks. We find several superfamilies of previously unrelated networks with very similar SPs. One superfamily, including transcription networks of microorganisms, represents “rate-limited” information-processing networks strongly constrained by the response time of their components. A distinct superfamily includes protein signaling, developmental genetic networks, and neuronal wiring. Additional superfamilies include power grids, protein-structure networks and geometric networks, World Wide Web links and social networks, and word-adjacency networks from different languages.  
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  Notes 10.1126/science.1089167 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5033  
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Author Artzy-Randrup, Y.; Fleishman, S.J.; Ben-Tal, N.; Stone, L. doi  openurl
  Title Comment on “Network Motifs: Simple Building Blocks of Complex Networks” and “Superfamilies of Evolved and Designed Networks” Type Journal Article
  Year (up) 2004 Publication Science Abbreviated Journal Science  
  Volume 305 Issue 5687 Pages 1107c  
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  Notes 10.1126/science.1099334 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5037  
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Author List, C. url  doi
openurl 
  Title Democracy in animal groups: a political science perspective Type Journal Article
  Year (up) 2004 Publication Trends in Ecology & Evolution (Personal Edition) Abbreviated Journal Trends Ecol Evol  
  Volume 19 Issue 4 Pages 168-169  
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  Language English Summary Language Original Title  
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  ISSN 0169-5347 ISBN Medium  
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  Notes PMID:16701250 Approved no  
  Call Number Equine Behaviour @ team @ Serial 5137  
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Author Aberle, K.S.; Hamann, H.; Drögemüller, C.; Distl, O. url  doi
openurl 
  Title Genetic diversity in German draught horse breeds compared with a group of primitive, riding and wild horses by means of microsatellite DNA markers Type Journal Article
  Year (up) 2004 Publication Animal Genetics Abbreviated Journal Anim. Gen.  
  Volume 35 Issue 4 Pages 270-277  
  Keywords diversity; endangered breeds; genetic variation; horse; microsatellite  
  Abstract Summary We compared the genetic diversity and distance among six German draught horse breeds to wild (Przewalski's Horse), primitive (Icelandic Horse, Sorraia Horse, Exmoor Pony) or riding horse breeds (Hanoverian Warmblood, Arabian) by means of genotypic information from 30 microsatellite loci. The draught horse breeds included the South German Coldblood, Rhenish German Draught Horse, Mecklenburg Coldblood, Saxon Thuringa Coldblood, Black Forest Horse and Schleswig Draught Horse. Despite large differences in population sizes, the average observed heterozygosity (Ho) differed little among the heavy horse breeds (0.64�0.71), but was considerably lower than in the Hanoverian Warmblood or Icelandic Horse population. The mean number of alleles (NA) decreased more markedly with declining population sizes of German draught horse breeds (5.2�6.3) but did not reach the values of Hanoverian Warmblood (NA = 6.7). The coefficient of differentiation among the heavy horse breeds showed 11.6% of the diversity between the heavy horse breeds, as opposed to 21.2% between the other horse populations. The differentiation test revealed highly significant genetic differences among all draught horse breeds except the Mecklenburg and Saxon Thuringa Coldbloods. The Schleswig Draught Horse was the most distinct draught horse breed. In conclusion, the study demonstrated a clear distinction among the German draught horse breeds and even among breeds with a very short history of divergence like Rhenish German Draught Horse and its East German subpopulations Mecklenburg and Saxon Thuringa Coldblood.  
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  Publisher Blackwell Science Ltd Place of Publication Editor  
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  ISSN 1365-2052 ISBN Medium  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5184  
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Author Eckardt, G.; Windhofer, A. openurl 
  Title Untersuchung der Beanspruchung von Pferden während Isolation und beim Verladen Type Manuscript
  Year (up) 2004 Publication Abbreviated Journal  
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  Corporate Author Thesis Master's thesis  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5190  
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Author Hois, C. openurl 
  Title Feldstudie zur Gewichtsentwicklung und Gewichtsschätzung beim wachsenden Pferd Type Manuscript
  Year (up) 2004 Publication Abbreviated Journal  
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  Corporate Author Thesis Ph.D. thesis  
  Publisher Tierärztlichen Fakultät der Ludwig-Maximilians-Universität München Place of Publication Editor  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5204  
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