| Records |
| Author |
Pack, A. A.; Herman, L. M. |
| Title |
Bottlenosed Dolphins (Tursiops truncatus) Comprehend the Referent of Both Static and Dynamic Human Gazing and Pointing in an Object-Choice Task. |
Type |
Journal Article |
| Year |
2004 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J. Comp. Psychol. |
| Volume |
118 |
Issue |
2 |
Pages |
160-171 |
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| Abstract |
The authors tested 2 bottlenosed dolphins (Tursiops truncatus) for their understanding of human-directed gazing or pointing in a 2-alternative object-choice task. A dolphin watched a human informant either gazing at or pointing toward 1 of 2 laterally placed objects and was required to perform a previously indicated action to that object. Both static and dynamic gaze, as well as static and dynamic direct points and cross-body points, yielded errorless or nearly errorless performance. Gaze with the informant's torso obscured (only the head was shown) produced no performance decrement, but gaze with eyes only resulted in chance performance. The results revealed spontaneous understanding of human gaze accomplished through head orientation, with or without the human informant's eyes obscured, and demonstrated that gaze-directed cues were as effective as point-directed cues in the object-choice task. (PsycINFO Database Record (c) 2009 APA, all rights reserved) |
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yes |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4976 |
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| Author |
Griffiths,S. W.; Brockmark, S.; Höjesjö,J.; Johnsson,J. I. |
| Title |
Coping with divided attention: the advantage of familiarity |
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Journal Article |
| Year |
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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10.1098/rspb.2003.2648 |
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Equine Behaviour @ team @ |
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5007 |
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Bugnyar, T.; Stöwe, M.; Heinrich, B. |
| Title |
Ravens, Corvus corax, follow gaze direction of humans around obstacles |
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Journal Article |
| Year |
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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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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10.1098/rspb.2004.2738 |
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Equine Behaviour @ team @ |
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5009 |
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Milo, R.; Itzkovitz, S.; Kashtan, N.; Levitt, R.; Alon, U. |
| Title |
Response to Comment on “Network Motifs: Simple Building Blocks of Complex Networks” and “Superfamilies of Evolved and Designed Networks” |
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Journal Article |
| Year |
2004 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
305 |
Issue |
5687 |
Pages |
1107d |
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10.1126/science.1100519 |
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no |
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Equine Behaviour @ team @ |
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5031 |
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Milo, R.; Itzkovitz, S.; Kashtan, N.; Levitt, R.; Shen-Orr, S.; Ayzenshtat, I.; Sheffer, M.; Alon, U. |
| Title |
Superfamilies of Evolved and Designed Networks |
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Journal Article |
| Year |
2004 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
303 |
Issue |
5663 |
Pages |
1538-1542 |
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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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10.1126/science.1089167 |
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no |
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Equine Behaviour @ team @ |
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5033 |
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Artzy-Randrup, Y.; Fleishman, S.J.; Ben-Tal, N.; Stone, L. |
| Title |
Comment on “Network Motifs: Simple Building Blocks of Complex Networks” and “Superfamilies of Evolved and Designed Networks” |
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Journal Article |
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2004 |
Publication |
Science |
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Science |
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305 |
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5687 |
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1107c |
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10.1126/science.1099334 |
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Equine Behaviour @ team @ |
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5037 |
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| Author |
List, C. |
| Title |
Democracy in animal groups: a political science perspective |
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Journal Article |
| Year |
2004 |
Publication |
Trends in Ecology & Evolution (Personal Edition) |
Abbreviated Journal |
Trends Ecol Evol |
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19 |
Issue |
4 |
Pages |
168-169 |
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English |
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0169-5347 |
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PMID:16701250 |
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no |
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Equine Behaviour @ team @ |
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5137 |
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Eckardt, G.; Windhofer, A. |
| Title |
Untersuchung der Beanspruchung von Pferden während Isolation und beim Verladen |
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2004 |
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Master's thesis |
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no |
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Equine Behaviour @ team @ |
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5190 |
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| Author |
Hois, C. |
| Title |
Feldstudie zur Gewichtsentwicklung und Gewichtsschätzung beim wachsenden Pferd |
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2004 |
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Ph.D. thesis |
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Tierärztlichen Fakultät der Ludwig-Maximilians-Universität München |
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no |
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Equine Behaviour @ team @ |
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5204 |
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| Author |
Pongrácz, P; Miklósi, Á; Timár-Geng, K; Csányi, V. |
| Title |
Verbal Attention Getting as a Key Factor in Social Learning Between Dog (Canis familiaris) and Human. |
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Journal Article |
| Year |
2004 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J. Comp. Psychol. |
| Volume |
118 |
Issue |
4 |
Pages |
375-383. |
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Pet dogs (Canis familiaris) learn to detour a V-shaped fence effectively from an unfamiliar human demonstrator. In this article, 4 main features of the demonstrator's behavior are highlighted: (a) the manipulation of the target, (b) the familiarity of the demonstrator, (c) the role of verbal attention-getting behavior, and (d) whether a strange trained dog could also be an effective demonstrator. The results show that the main factor of a successful human demonstration is the continuous verbal communication with the dog during detouring. It was also found that an unfamiliar dog demonstrator was as efficient as the unfamiliar experimenter. The experiments provide evidence that in adult dogs, communicative context with humans is needed for effective interspecific social learning to take place. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
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no |
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Equine Behaviour @ team @ |
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5218 |
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