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Author Sugiyama Y; Koman J; Bhoye Show M
Title Ant-catching wands of wild chimpanzees at Bossou, Guinea Type Journal Article
Year 1988 Publication Folia Primatol. Abbreviated Journal
Volume 51 Issue Pages 56
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Call Number Equine Behaviour @ team @ Serial 3042
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Author Wimmer H; Hogrefe GJ; Perner J
Title Children's understanding of informational access as a source of knowledge Type Journal Article
Year 1988 Publication Child Dev. Abbreviated Journal
Volume 59 Issue Pages 386
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Call Number Equine Behaviour @ team @ Serial 3050
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Author Steinhoff, H.J.
Title A continuous wave laser T-jump apparatus and its application to chemical reactions in hemoglobin single crystals Type Journal Article
Year 1988 Publication Journal of Biochemical and Biophysical Methods Abbreviated Journal J Biochem Biophys Methods
Volume 15 Issue 6 Pages 319-330
Keywords Animals; Chemistry; Crystallization; *Heat; *Hemoglobins; Horses/blood; *Lasers; Methemoglobin; Solutions; Thermodynamics; Thiocyanates
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.
Address Institut fur Biophysik, Ruhr-Universitat Bochum, F.R.G
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ISSN 0165-022X ISBN Medium
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Notes PMID:3379245 Approved no
Call Number Equine Behaviour @ team @ Serial 3804
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Author Mackintosh, N.J.
Title Approaches to the study of animal intelligence Type Journal Article
Year 1988 Publication British Journal of Psychology Abbreviated Journal
Volume 79 Issue Pages 509-525
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Notes Cited By (since 1996): 17; Export Date: 24 October 2008 Approved no
Call Number Admin @ knut @ Serial 4607
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Author Fuller, T.K.; Sampson, B.A.
Title Evaluation of a simulated howling survey for wolves Type Journal Article
Year 1988 Publication J Widl Manag Abbreviated Journal
Volume 52 Issue Pages
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Call Number Equine Behaviour @ team @ Fuller1988 Serial 6458
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Author Marinier, S.L.; Alexander, A.J.; Waring, G.H.
Title Flehmen behaviour in the domestic horse: Discrimination of conspecific odours Type Journal Article
Year 1988 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.
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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Call Number refbase @ user @ Serial 507
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Author Houston, A.I.; McNamara, J.M.
Title Fighting for food: a dynamic version of the Hawk-Dove game Type Journal Article
Year 1988 Publication Evolutionary Ecology Abbreviated Journal Evol. Ecol.
Volume 2 Issue 1 Pages 51-64
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Call Number refbase @ user @ Serial 750
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Author Feh, C.
Title Social behaviour and relationships of Prezewalski horses in Dutch semi-reserves Type Journal Article
Year 1988 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.
Volume 21 Issue 1-2 Pages 71-87
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Abstract 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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Call Number refbase @ user @ Serial 764
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Author Keiper, R.R.
Title Social interactions of the Przewalski horse (Equus przewalskii Poliakov, 1881) herd at the Munich Zoo Type Journal Article
Year 1988 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.
Volume 21 Issue 1-2 Pages 89-97
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Abstract 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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Call Number refbase @ user @ Serial 775
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Author Hogan, E.S.; Houpt, K.A.; Sweeney, K.
Title The effect of enclosure size on social interactions and daily activity patterns of the captive Asiatic wild horse (Equus przewalskii) Type Journal Article
Year 1988 Publication Applied Animal Behaviour Science Abbreviated Journal Appl. Anim. Behav. Sci.
Volume 21 Issue 1-2 Pages 147-168
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Abstract Two herds of Przewalski horses at the Minnesota Zoological Garden were observed during 1980 in each of 2 enclosures that differed in size. The larger enclosure was a 3.4-ha pasture; the smaller enclosure was a 17 x 30-m grass-less pen. One herd was composed of a stallion, 3 adult mares and 2 foals. The other consisted of a stallion and 2 mares. All occurrences of aggression, mutual grooming and snapping were recorded, and 5-min scan-samples of the activity state of each horse were taken. The time budgets, frequency of aggression and frequency of mutual grooming differed significantly with enclosure size for both herds. More time was spent pacing and milling in the smaller enclosure, and the frequency of aggressions and of mutual grooming was also higher. Only the foals exhibited snapping; frequency of snapping did not vary with enclosure size. More time was spent feeding in the larger enclosure. Provision of hay in the smaller enclosure eliminated the differences in time spent feeding. A second study was conducted during the spring of 1984 in an intermediate-sized enclosure, 0.4 ha, a sub-division of the pasture on which the horses were kept in 1980. One herd consisted of a stallion, 2 mares and 2 yearlings; the other consisted of a stallion, 3 mares and a foal. One of the stallions and all of the mares were those studied in 1980, but that stallion and one of the mares were in different herds than they had been in 1980. The frequency of aggression was similar to that observed in 1980.
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Call Number refbase @ user @ Serial 780
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