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Author |
Sugiyama Y; Koman J; Bhoye Show M |
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Title |
Ant-catching wands of wild chimpanzees at Bossou, Guinea |
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1988 |
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Folia Primatol. |
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51 |
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56 |
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Equine Behaviour @ team @ |
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3042 |
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Author |
Wimmer H; Hogrefe GJ; Perner J |
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Title |
Children's understanding of informational access as a source of knowledge |
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Year |
1988 |
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Child Dev. |
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59 |
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386 |
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Equine Behaviour @ team @ |
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3050 |
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Author |
Steinhoff, H.J. |
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Title |
A continuous wave laser T-jump apparatus and its application to chemical reactions in hemoglobin single crystals |
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Journal Article |
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Year |
1988 |
Publication |
Journal of Biochemical and Biophysical Methods |
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J Biochem Biophys Methods |
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Volume |
15 |
Issue |
6 |
Pages |
319-330 |
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Animals; Chemistry; Crystallization; *Heat; *Hemoglobins; Horses/blood; *Lasers; Methemoglobin; Solutions; Thermodynamics; Thiocyanates |
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Abstract |
A laser temperature jump apparatus is constructed where the T-jump is achieved by means of the direct absorption of continuous laser radiation of low intensity by a solid sample. The final temperature in the irradiated volume element is reached when the absorbed radiation power equals the dissipation of heat by heat conduction. The time range from the beginning of irradiation to the stationary state depends on the geometry of the irradiated volume element and is less than 10 ms. The heating laser beam is simultaneously used to detect the relaxation to the new chemical equilibrium in the sample. Relaxation processes with relaxation rates between 10(2) s-1 and less than 10(-3) s-1 on samples with volumes less than 10(-3) mm3 may be investigated using this T-jump method. One application of this method is the determination of reaction rates of ligand reactions in hemoglobin single crystals. Rate constants obtained for the reaction of thiocyanate with crystallized horse methemoglobin are presented. |
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Institut fur Biophysik, Ruhr-Universitat Bochum, F.R.G |
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English |
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0165-022X |
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PMID:3379245 |
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Equine Behaviour @ team @ |
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3804 |
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Mackintosh, N.J. |
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Title |
Approaches to the study of animal intelligence |
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1988 |
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British Journal of Psychology |
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79 |
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509-525 |
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Cited By (since 1996): 17; Export Date: 24 October 2008 |
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Admin @ knut @ |
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4607 |
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Fuller, T.K.; Sampson, B.A. |
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Title |
Evaluation of a simulated howling survey for wolves |
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1988 |
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J Widl Manag |
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52 |
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Equine Behaviour @ team @ Fuller1988 |
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6458 |
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Author |
Marinier, S.L.; Alexander, A.J.; Waring, G.H. |
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Title |
Flehmen behaviour in the domestic horse: Discrimination of conspecific odours |
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Journal Article |
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Year |
1988 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
19 |
Issue |
3-4 |
Pages |
227-237 |
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Abstract |
American Saddlebred horses were used to test the responses of domestic horses to the odours of conspecifics. In all cases the odours were tested in the absence of the donor animal. Thus the test animal's behavioural responses were concentrated on the olfactory stimuli, and possible interference from donor behaviour was eliminated. Stallions were significantly more responsive than mares and geldings. This was shown in both flehmen and sniffing behaviour to urine/vaginal secretions and in sniffing behaviour to faecal samples. Only stallions were used for subsequent tests. Stallions showed no significant differences in response to the odour of urine/vaginal secretions of an oestrus mare from that when she was not in season. Parameters used for analysis of data were frequency, latency and duration of flehmen as well as duration of responsiveness to samples. In testing for differences in odours between individual mares, two methods were used. The stallions differentiated between samples from individual mares. In some cases this differentiation was exhibited when the stallions were merely presented with the two samples in sequence. In other cases statistically significant differences in response to the odours were shown only by simultaneous presentation of the two samples to the test stallion. Parameters used for data analysis were frequency and duration of flehmen and duration of responsiveness. |
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refbase @ user @ |
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507 |
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Author |
Houston, A.I.; McNamara, J.M. |
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Title |
Fighting for food: a dynamic version of the Hawk-Dove game |
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1988 |
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Evolutionary Ecology |
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Evol. Ecol. |
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2 |
Issue |
1 |
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51-64 |
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refbase @ user @ |
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750 |
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Author |
Feh, C. |
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Title |
Social behaviour and relationships of Prezewalski horses in Dutch semi-reserves |
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Journal Article |
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Year |
1988 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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21 |
Issue |
1-2 |
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71-87 |
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A short-term study was made of 2 groups of Przewalski horses, a bachelor group of 4 juvenile stallions in Ooij Polder and a harem group of 1 stallion and 4 mares. All social interactions were recorded and the nearest and farthest neighbour was noted. Correspondence analysis was used to determine what parameters determined the relationships among the horses. There was a linear hierarchy among the bachelor stallions. The dominant stallion of the group was also the oldest. The hierarchy was not linear in the harem group, and the 3-year-old stallion was subordinate to the 5-year-old mares. He was also most likely to be farthest from other horses. The mares of the same age, who had also arrived in the park at the same time, tended to be one another's nearest neighbours. The frequency of aggression is higher among Przewalski horses than among domestic horses of similar ages. Correspondence analysis revealed that head-threats and other forms of aggression accounted for more of the variance in the data than any other behaviour, but submission, play and social interactions also contributed. |
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refbase @ user @ |
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764 |
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Author |
Ginsberg, J.R. |
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Title |
Social organisation and mating strategies of an arid adapted equid: The Grevy`s zebra. |
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1988 |
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268 pp |
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Ph.D. thesis |
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Princeton University |
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Princeton |
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refbase @ user @ |
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766 |
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Author |
Keiper, R.R. |
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Title |
Social interactions of the Przewalski horse (Equus przewalskii Poliakov, 1881) herd at the Munich Zoo |
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1988 |
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Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
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21 |
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1-2 |
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89-97 |
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Data were collected on 972 aggressions and 233 acts of mutual grooming in a herd of 9 Przewalski horses in the Hellabrunn Tierpark in Munich, West Germany. The herd was composed of 1 adult stallion, 5 adult mares and 3 foals. A distinct linear dominance hierarchy was present in the herd, with the stallion being the top-ranking animal. Age was significantly correlated with rank. Almost 40% of all aggressions consisted of herding actions by the stallion. Threats to bite (20% of all aggressions) and threats to kick (11.4%) were next in frequency of occurrence. Most mutual grooms (71%) involved grooming the front part of the body. Although mutual grooming may be used to appease higher-ranked animals, most grooming bouts were between related horses. Foals initiate 47.6% of all allogrooming. Mutual grooming may reduce weaning conflict between a mare and her foal or may result in female coalitions that defend against predators or aggression by the herd stallion. |
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refbase @ user @ |
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775 |
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