| Records |
| Author |
Roels, S.; Tilmant, K.; Van Daele, A.; Van Marck, E.; Ducatelle, R. |
| Title |
Proliferation, DNA ploidy, p53 overexpression and nuclear DNA fragmentation in six equine melanocytic tumours |
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Journal Article |
| Year |
2000 |
Publication |
Journal of Veterinary Medicine, Series A |
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| Volume |
47 |
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439-438 |
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refbase @ user @ |
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2016 |
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| Author |
Lanier, J.L.; Grandin, T.; Green, R.D.; Avery, D.; McGee, K. |
| Title |
The relationship between reaction to sudden, intermittent movements and sounds and temperament |
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Journal Article |
| Year |
2000 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
| Volume |
78 |
Issue |
6 |
Pages |
1467-1474 |
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N1 - |
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no |
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Equine Behaviour @ team @ |
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2945 |
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| Author |
Olesen, I.; Groen, A.F.; Gjerde, B. |
| Title |
Definition of animal breeding goals for sustainable production systems |
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Journal Article |
| Year |
2000 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
| Volume |
78 |
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3 |
Pages |
570-582 |
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N1 - |
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Equine Behaviour @ team @ |
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2934 |
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| Author |
Sprigge, T.L.S. |
| Title |
Darwinian Dominion: Animal Welfare and Human Interests: Lewis Petrinovich, Cambridge, Mass, London, England, MIT Press, 1999, ix + 431 pages, {pound}31.50 (hc) |
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Journal Article |
| Year |
2000 |
Publication |
J. Med. Ethics |
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26 |
Issue |
5 |
Pages |
412- |
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10.1136/jme.26.5.412 |
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Equine Behaviour @ team @ |
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2958 |
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| Author |
Bickerton, D. |
| Title |
Resolving Discontinuity: A Minimalist Distinction between Human and Non-human Minds |
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Journal Article |
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2000 |
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Integr. Comp. Biol. |
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40 |
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6 |
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862-873 |
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Our genotype is so similar to those of the African apes, and our last common ancestor with them so recent, that it seems impossible that human and non-human cognition should differ qualitatively. But the outputs of human cognition are unique in their limitless creativity and adaptability. Exaption resolves the apparent paradox. Assume that the power to create symbols emerges from stimulus-stimulus linkages and is latent in many animals, and that the structural side of language emerges from the argument structures inherent in the social calculus associated with reciprocal altruism. These adaptations confer the potential for language. However, creating complex messages requires uniquely long-lasting coherence of neural signals, which depends in turn on the large quantities of neurons unique to Homo. The only difference between human and non-human minds is that we can sustain longer and more complex trains of thought. All else (emotions, rational processes, even consciousness) could be exactly the same. |
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10.1093/icb/40.6.862 |
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no |
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Equine Behaviour @ team @ |
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2966 |
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| Author |
Forkman, B. |
| Title |
Domestic hens have declarative representations |
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Journal Article |
| Year |
2000 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
3 |
Issue |
3 |
Pages |
135-137 |
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It is generally considered that information can be stored either as a procedural or as a declarative representation. A devaluation technique was used to determine whether hens have declarative representations. Individual hens (Gallus gallus domesticus) were fed in an enclosure with two containers, each with a new food type. One of the food types was devalued by pre-feeding with that food, after which the hens were tested with empty food containers. The pre-feeding should only affect the choice of the hens if they have learned where a particular food type was (declarative representation) rather than “go left when coming into the enclosure” (procedural representation). A significant proportion of the hens went to the location previously occupied by the non-devalued food (seven out of eight). This supports the hypothesis that domestic hens can form declarative representations. |
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Equine Behaviour @ team @ |
Serial |
3143 |
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| Author |
Xia, L.; Siemann, M.; Delius, J.D. |
| Title |
Matching of numerical symbols with number of responses by pigeons |
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Journal Article |
| Year |
2000 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
3 |
Issue |
1 |
Pages |
35-43 |
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Pigeons were trained to peck a certain number of times on a key that displayed one of several possible numerical symbols. The particular symbol displayed indicated the number of times that the key had to be pecked. The pigeons signalled the completion of the requirement by operating a separate key. They received a food reward for correct response sequences and time-out penalties for incorrect response sequences. In the first experiment nine pigeons learned to allocate 1, 2, 3 or 4 pecks to the corresponding numerosity symbols s1, s2, s3 and s4 with levels of accuracy well above chance. The second experiment explored the maximum set of numerosities that the pigeons were capable of handling concurrently. Six of the pigeons coped with an s1-s5 task and four pigeons even managed an s1-s6 task with performances that were significantly above chance. Analysis of response times suggested that the pigeons were mainly relying on a number-based rather than on a time-based strategy. |
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Equine Behaviour @ team @ |
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3163 |
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Call, J.; Agnetta, B.; Tomasello, M. |
| Title |
Cues that chimpanzees do and do not use to find hidden objects |
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Journal Article |
| Year |
2000 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
3 |
Issue |
1 |
Pages |
23-34 |
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Chimpanzees follow conspecific and human gaze direction reliably in some situations, but very few chimpanzees reliably use gaze direction or other communicative signals to locate hidden food in the object-choice task. Three studies aimed at exploring factors that affect chimpanzee performance in this task are reported. In the first study, vocalizations and other noises facilitated the performance of some chimpanzees (only a minority). In the second study, various behavioral cues were given in which a human experimenter either touched, approached, or actually lifted and looked under the container where the food was hidden. Each of these cues led to enhanced performance for only a very few individuals. In the third study – a replication with some methodological improvements of a previous experiment – chimpanzees were confronted with two experimenters giving conflicting cues about the location of the hidden food, with one of them (the knower) having witnessed the hiding process and the other (the guesser) not. In the crucial test in which a third experimenter did the hiding, no chimpanzee found the food at above chance levels. Overall, in all three studies, by far the best performers were two individuals who had been raised in infancy by humans. It thus seems that while chimpanzees are very good at “behavior reading” of various sorts, including gaze following, they do not understand the communicative intentions (informative intentions) behind the looking and gesturing of others – with the possible exception of enculturated chimpanzees, who still do not understand the differential significance of looking and gesturing done by people who have different knowledge about states of affairs in the world. |
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Equine Behaviour @ team @ |
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3176 |
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| Author |
Durier, V.; Rivault, C. |
| Title |
Learning and foraging efficiency in German cockroaches, Blattella germanica (L.) (Insecta: Dictyoptera) |
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Journal Article |
| Year |
2000 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
3 |
Issue |
3 |
Pages |
139-145 |
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| Abstract |
We analysed, under laboratory test conditions, how German cockroach larvae oriented their outgoing foraging trip from their shelter. Our results stressed the importance of external factors, like availability and spatial distribution of food sources, in the choice of a foraging strategy within their home range. When food sources were randomly distributed, larvae adopted a random food search strategy. When food distribution was spatially predictable and reliable, cockroaches were able to relate the presence of food with a landmark during a 3-day training period and to develop an oriented search strategy. Cockroaches were able to associate learned spatial information about their home range to the presence of food resources and then to improve their foraging efficiency. However, conflict experiments revealed that detection of food odour overrode learned landmark cues. |
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Equine Behaviour @ team @ |
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3203 |
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| Author |
Depraz, V.; Leboucher, G.; Kreutzer, M. |
| Title |
Early tutoring and adult reproductive behaviour in female domestic canary (Serinus canaria) |
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Journal Article |
| Year |
2000 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
3 |
Issue |
1 |
Pages |
45-51 |
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We studied the effect of early tutoring on the subsequent sexual preferences and reproductive activity of female domestic canaries (Serinus canaria). Young female canaries were exposed during the first 4 months of life to songs of either domestic or wild canaries. When adult, these females were again exposed to domestic or wild songs. In the first experiment, the sexual responses of the females to unfamiliar domestic and wild songs were quantified with the copulation solicitation display (CSD) assay. In the second experiment, the same females were tested again with modified tutoring songs. In the third experiment, song stimulation of nest-building and egg-laying was studied. Domestic-strain-tutored females gave more CSDs to domestic than to wild songs. In contrast, wild-strain-tutored females showed no sexual preference. We propose that the sexual preference of adult domestic-strain-tutored female canaries for domestic songs is the consequence of learning and categorisation processes. The discrepancy between the results of the domestic-strain-tutored females and those of the wild-strain-tutored females suggests that female canaries have a predisposition to learn songs of their own strain rather than songs of an alien strain. In the third experiment nest-building and egg-laying activities appeared to be unaffected by early tutoring conditions: there was no significant differential effect of the different tutoring and exposure conditions on nest-building and egg-laying scores. Mate attraction and stimulation of females' reproductive activity appear to be two separate functions of male song, which may have been shaped by different evolutionary constraints. |
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Equine Behaviour @ team @ |
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3222 |
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