| Records |
| Author |
Madigan, J.E.; Kortz, G.; Murphy, C.; Rodger, L. |
| Title |
Photic headshaking in the horse: 7 cases |
Type |
Journal Article |
| Year |
1995 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
| Volume |
27 |
Issue |
4 |
Pages |
306-311 |
| Keywords |
Animals; Anti-Allergic Agents/therapeutic use; *Behavior, Animal; Cyproheptadine/therapeutic use; Female; *Head; Horse Diseases/drug therapy/*etiology; Horses; Light/*adverse effects; Male; Movement Disorders/drug therapy/etiology/*veterinary |
| Abstract |
Seven horses with headshaking are described. No physical abnormalities were detected in any of the cases. Six of these horses had onset of clinical signs in the spring. The role of light was assessed by application of a blindfold or dark grey lens to the eyes, covering the eyes with a face mask and observing the horse in total darkness outdoors. Cessation of headshaking was observed with blindfolding (5/5 horses), night darkness outdoors (4/4 horses) and use of grey lenses (2/3 horses). Outdoor behaviour suggested efforts to avoid light in 4/4 cases. The photic sneeze in man is suggested as a putative mechanism for equine headshaking. Five of 7 horses had improvement with cyproheptadine treatment (0.3 mg/kg bwt b.i.d.). Headshaking developed within 2 calendar weeks of the same date for 3 consecutive years in one horse. Neuropharmacological alterations associated with photoperiod mechanisms leading to optic trigeminal summation are suggested as possible reasons for spring onset of headshaking. |
| Address |
Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis 95616-8737, USA |
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English |
Summary Language |
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Series Issue |
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Edition |
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| ISSN |
0425-1644 |
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| Notes |
PMID:8536668 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
1940 |
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| Author |
Petruso, E.J.; Fuchs, T.; Bingman, V.P. |
| Title |
Time-space learning in homing pigeons (Columba livia): orientation to an artificial light source |
Type |
Journal Article |
| Year |
2007 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
10 |
Issue |
2 |
Pages |
181-188 |
| Keywords |
Animals; Circadian Rhythm; Columbidae/*physiology; Homing Behavior/physiology; Learning/*physiology; *Light; Orientation/*physiology; Space Perception/*physiology; Time Perception/*physiology |
| Abstract |
Time-space learning reflects an ability to represent in memory event-stimulus properties together with the place and time of the event; a capacity well developed in birds. Homing pigeons were trained in an indoor octagonal arena to locate one food goal in the morning and a different food goal in the late afternoon. The goals differed with respect to their angular/directional relationship to an artificial light source located outside the arena. Further, the angular difference in reward position approximated the displacement of the sun's azimuth that would occur during the same time period. The experimental birds quickly learned the task, demonstrating the apparent ease with which birds can adopt an artificial light source to discriminate among alternative spatial responses at different times of the day. However, a novel midday probe session following successful learning revealed that the light source was interpreted as a stable landmark and not as a surrogate sun that would support compass orientation. Probe sessions following a phase shift of the light-dark cycle revealed that the mechanism employed to make the temporal discrimination was prevailingly based on an endogenous circadian rhythm and not an interval timing mechanism. |
| Address |
Department of Psychology and J.P. Scott Center for Neuroscience, Mind and Behavior Bowling Green State University, Bowling Green, OH 43403, USA |
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English |
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Edition |
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| ISSN |
1435-9448 |
ISBN |
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| Notes |
PMID:17160343 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2432 |
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| Author |
Naug, D.; Arathi, H.S. |
| Title |
Sampling and decision rules used by honey bees in a foraging arena |
Type |
Journal Article |
| Year |
2007 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
10 |
Issue |
2 |
Pages |
117-124 |
| Keywords |
Animals; Bees/*physiology; *Choice Behavior; Cooperative Behavior; *Feeding Behavior; Flight, Animal |
| Abstract |
Animals must continuously choose among various available options to exploit the most profitable resource. They also need to keep themselves updated about the values of all available options, since their relative values can change quickly due to depletion or exploitation by competitors. While the sampling and decision rules by which foragers profitably exploit a flower patch have attracted a great deal of attention in theory and experiments with bumble bees, similar rules for honey bee foragers, which face similar foraging challenges, are not as well studied. By presenting foragers of the honey bee Apis cerana with choice tests in a foraging arena and recording their behavior, we investigate possible sampling and decision rules that the foragers use to choose one option over another and to track other options. We show that a large part of the sampling and decision-making process of a foraging honey bee can be explained by decomposing the choice behavior into dichotomous decision points and incorporating the cost of sampling. The results suggest that a honey bee forager, by using a few simple rules as part of a Bayesian inference process, is able to effectively deal with the complex task of successfully exploiting foraging patches that consist of dynamic and multiple options. |
| Address |
Department of Biology, Colorado State University, Fort Collins, CO 80523, USA. dhruba@lamar.colostate.edu |
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English |
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1435-9448 |
ISBN |
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Conference |
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| Notes |
PMID:16941157 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2441 |
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| Author |
Wagner, G. |
| Title |
[Flight leadership in flocks of homing pigeons] |
Type |
Journal Article |
| Year |
1975 |
Publication |
Zeitschrift für Tierpsychologie |
Abbreviated Journal |
Z. Tierpsychol. |
| Volume |
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Issue |
39 |
Pages |
61-74 |
| Keywords |
Animals; *Columbidae; *Flight, Animal; *Orientation |
| Abstract |
Groups of 3-5 homing pigeons individually recognizable by different colours of their plumage were followed by helicopter on their way home. In most cases the animals flew together as a group with frequently changing leadership. Flight formations in terms of leadership were noted every minute. It was examined statistically whether the flight order varies at random or whether there are leading and led birds. In 6 out of 7 experiments with groups of 4-5 pigeons flight order was far from random, one or two pigeons proving to be leaders. In only one experiment leadership did not differ from a random distribution. No correlation could be found between the tendency to lead within a group and homing performance of the single pigeon when released individually. |
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German |
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Original Title |
Zur Frage des Flugfuhrens in heimkehrenden Brieftaubengruppen |
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| ISSN |
0044-3573 |
ISBN |
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Conference |
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| Notes |
PMID:1231423 |
Approved |
no |
| Call Number |
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Serial |
2050 |
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| Author |
Enileeva, N.K. |
| Title |
[Ecological characteristics of horse stomach botflies in Uzbekistan] |
Type |
Journal Article |
| Year |
1987 |
Publication |
Parazitologiia |
Abbreviated Journal |
Parazitologiia |
| Volume |
21 |
Issue |
4 |
Pages |
577-579 |
| Keywords |
Animals; Diptera/*physiology; Ecology; Female; Flight, Animal; Horses/*parasitology; Larva/physiology; Male; Population Dynamics; Uzbekistan |
| Abstract |
The paper describes the flight periods and dynamics of abundance of horse botflies, life span of females and males, effect of environmental factors on the activity of flies and their behaviour, potential fecundity of different species of botflies, duration of embryonal development, preservation of viability of larvae in egg membranes, localization of different stages of botflies in the host, and methods of their control. |
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Place of Publication |
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Editor |
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| Language |
Russian |
Summary Language |
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Original Title |
Ekologicheskie osobennosti zheludochnykh ovodov loshadei v Uzbekistane |
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Series Title |
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Abbreviated Series Title |
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Edition |
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| ISSN |
0031-1847 |
ISBN |
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| Notes |
PMID:2958767 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2680 |
| Permanent link to this record |
