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Author |
Smith, S.F.; Appleby, M.C.; Hughes, B.O. |
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Title |
Problem solving by domestic hens: opening doors to reach nest sites |
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Journal Article |
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Year |
1990 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
28 |
Issue |
3 |
Pages |
287-292 |
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In a trial of cage designs for laying hens, eggs were discovered in dust baths where access was restricted by a closed door during the normal laying period (08:00-13:00 h). Observations showed that the hens in these dust bath treatments had developed methods of opening the doors in order to lay in the baths. Three different methods of opening were observed. An average time of 34.4 min was spent attempting to open the doors before access was finally achieved. This implies a strong nesting motivation in these hens. The proportion of eggs laid in the dust baths increased (with occasional fluctuations) over a 24-week period. Door opening is likely to have initially developed in one individual in each cage through a trial and error basis, and then have been learned by cage mates through imitation. The speed and efficiency of door opening was not found to increase with experience or time. |
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0168-1591 |
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Equine Behaviour @ team @ |
Serial |
6164 |
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Author |
Petherick, J.C.; Rutter, S.M. |
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Title |
Quantifying motivation using a computer-controlled push-door |
Type |
Journal Article |
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Year |
1990 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
27 |
Issue |
1 |
Pages |
159-167 |
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A computer-controlled push-door system was designed and tested as a method for measuring motivation. Eleven domestic hens were trained to use the push-door to gain access to food. They were deprived of food for 12 h or 43 h on 12 occasions and the push-door was used to measure the amount of “work” (measured as force × time) that they performed to gain access to a food reward. When deprived of food for 12 h the hens took significantly longer (P<0.01) to reach the required threshold of work, than when deprived for 43 h. This difference arose from the amount of time that the hens spent not pushing at the door. The problems encountered with this system and such an approach to measuring motivation are discussed. |
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0168-1591 |
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Equine Behaviour @ team @ |
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6165 |
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Author |
Byrne, R.W.; Whiten, A. |
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Title |
Tactical deception in primates: the 1990 database |
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Book Whole |
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Year |
1990 |
Publication |
Primate Reports |
Abbreviated Journal |
Primate Rep. |
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Volume |
27 |
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Pages |
1-101 |
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German Primate Center |
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Equine Behaviour @ team @ |
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6172 |
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Author |
Tooze, Z.J.; Harrington, F.H.; Fentress, J.C. |
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Title |
Individually distinct vocalizations in timber wolves, Canis lupus |
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Journal Article |
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Year |
1990 |
Publication |
Anim Behav |
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40 |
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Call Number |
Equine Behaviour @ team @ Tooze1990 |
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6468 |
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Author |
Sato, S.; Sako, S.; Maeda, A. |
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Title |
Social licking patterns in cattle (<em>Bos taurus</em>): influence of environmental and social factors |
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Journal Article |
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Year |
1991 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Applied Animal Behaviour Science |
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Volume |
32 |
Issue |
1 |
Pages |
3-12 |
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To investigate the functions of social licking in cattle, four calves (one heifer and one steer in each of two herds), known to exhibit frequent social licking were observed continuously for 2 h before sunset for 13 days, using the focal animal sampling method. Calves were observed under various environmental conditions. Social licking significantly decreased on rainy days and tended to increase in a dirty barn and when food was restricted. Solicitation for social licking occurred not only from dominant animals of pairs but also from subordinates. Of the licking interactions, 31% occurred following solicitation, and these accounted for 39% of the total time spent licking. Following solicitation, 78% of social licking was oriented to the head and the neck regions that were inaccessible to self-licking animals. Unsolicited licking, however, was oriented not only to the head and the neck but also to the back and the rump regions, and these two latter regions were the major ones to receive licking. The effect of social relationships on social licking was investigated using least-squares analysis of variance. Social factors investigated were the difference of dominance values, the dominance-subordinance relationship, and kinship and familiarity; the sex of calves involved was also considered. Only familiarity had a significant effect on licking; exchanges of social licking increased with length of cohabitation. We suggest that social licking may have a cleaning effect, a tension-reducing effect and a bonding effect. |
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Elsevier |
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0168-1591 |
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doi: 10.1016/S0168-1591(05)80158-3 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
6409 |
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Author |
Lee, P. |
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Title |
Adaptation to environmental change:an evolutionary perspective |
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Book Chapter |
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Year |
1991 |
Publication |
Primate responses to environmental changes |
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Pages |
39-56 |
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Chapmann & Hall |
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London |
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H. O. Box |
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Equine Behaviour @ team @ |
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6523 |
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Author |
Byrne, R.W. |
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Title |
Do larger brains mean greater intelligence? |
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Journal Article |
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Year |
1993 |
Publication |
Behavioral and Brain Sciences |
Abbreviated Journal |
Behav. Brain Sci. |
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16 |
Issue |
4 |
Pages |
696-697 |
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Cambridge University Press |
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ISSN |
1469-1825 |
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Equine Behaviour @ team @ |
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6171 |
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Title |
Wolves in Europe: status and perspectives |
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1993 |
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Munich Wildlife Society |
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Ettal, Germany |
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Equine Behaviour @ team @ ref8 |
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6449 |
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Author |
Genov, P.W.; Kostava, V. |
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Title |
Untersuchungen zur zahlenmäßigen Stärke des Wolfes und seiner Einwirkung auf die Haustierbestände in Bulgarien |
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Journal Article |
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Year |
1993 |
Publication |
Zeitschrift für Jagdwissenschaft |
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Volume |
39 |
Issue |
4 |
Pages |
217-223 |
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Die Untersuchung wurde in der Zeitspanne von 1984 bis 1988 durchgeführt. Es wurden die Protokolle des Staatlichen Versicherungsinstituts benutzt, die Angaben für Raubüberfälle von Wölfen auf Haustiere beinhalten (Tabelle 1). Außerdem wurden Angaben über die während dieser Zeitspanne erlegten Wölfe zusammengefaßt. Die Abschußzahlen lauten: 1984 – 163, 1985 – 147, 1986 – 179, 1987 – 211 und 1988 – 220 Tiere. Die Anzahl der in den einzelnen Gebirgen lebenden Wölfe wurde nach einer Umfrage festgestellt. Für die in Betracht kommenden Gebirge werden folgende Bestandszahlen angenommen: Rhodopen -- 60-80 Individuen, 189 bis 264 km2 pro Tier, Rila- und Piringebirge -- 60-80 Tiere, 109 bis 145 km2 pro Tier, Ossogowo-Belassiza Gebirgssystem -- 40-50 Individuen, 57-70 km2 pro Tier, West- und Mittelbalkan -- 35-38 Wölfe, 200 km2 pro Tier. Dazu kommen noch 10-15 Wölfe im Flußbecken von Beli Lom und etwa 20 Exemplare in Strandscha- und Sakargebirge. Insgesamt lebten in Bulgarien im Jahre 1988 etwa 260-330 Wölfe (Abb. 1). |
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1439-0574 |
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Equine Behaviour @ team @ Genov1993 |
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6686 |
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Author |
Fritts, S.H.; Bangs, E.E.; Gore, J.F. |
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Title |
The relationship of wolf recovery to habitat conservation and biodiversity in the northwestern United States |
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Year |
1994 |
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Landsc Urban Plan |
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28 |
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Equine Behaviour @ team @ Fritts1994 |
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6453 |
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