| Records |
| Author |
McCall, C.A. |
| Title |
The effect of body condition of horses on discrimination learning abilities |
Type |
Journal Article |
| Year |
1989 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
22 |
Issue |
3-4 |
Pages |
327-334 |
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| Abstract |
Discriminative learning abilities were studied in 12 mature, malnourished horses. All horses initially received a condition score (CS) between 2 and 4 on a scale of 1 (poor) to 9 (extremely fat). Then horses were assigned to one of 3 treatments based on their eventual, rehabilitated CS during discrimination testing: thin, CS 1-3; moderate, CS 4-6; and fat, CS 7-9. The discrimination learning task was performed for 14 days with a maximum of 20 trials per day. Daily criterion was set at eight consecutively correct trails. Total trials to first criteria and total errors during testing were recorded. Analysis of variance showed that treatments did not differ (P>0.05) in total trials to first criterion, however horses on the fat treatment did have higher total error scores (P<0.05) than horses on the thin or moderate treatments. This difference was probably owing to lack of motivation in the fat treatment horses, rather than to true learning ability differences. The sex of the horse did not significantly affect either learning score. |
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Equine Behaviour @ team @ |
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3570 |
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| Author |
Lloyd, P.H.; Rasa, O.A.E. |
| Title |
Status, reproductive success and fitness in Cape mountain zebra (Equus zebra zebra) |
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Journal Article |
| Year |
1989 |
Publication |
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Abbreviated Journal |
Behavioral Ecology and Sociobiology |
| Volume |
25 |
Issue |
6 |
Pages |
411-420 |
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Demographic data relating to herd size and stability are given for a population of Cape mountain zebra (Equus zebra zebra) under longterm observation. Temporal dispersion patterns of male and female offspring differed and were independent of the mother's status. Dispersion in females appeared to be related to physiological state, and dispersion in both sexes was related to age rather than changes in parental behaviour. Reproductive success of dominant and subordinate mares was equal and independent of age and social and reproductive variables. Fitness of dominant mares, however, was significantly higher than that of subordinates, the latter having a higher foal mortality, part of which could be attributable to dominants' aggression. The fitness of all males born was 1.6:1 compared with all females. Dominant mares produced significantly more daughters than sons. This trend was not found for subordinates. Mother's status was positively correlated with dominant status in her female offspring but not related to the subsequent status of her sons. Daughters had a more than twice as great a chance of breeding than sons. For maximum fitness gains, therefore, dominant mares should produce more daughters, since a high proportion of these would also have high status and fitness. This tendency is reflected in the sex ratio skewed towards females found for dominant mares. |
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Springer-Verlag |
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English |
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0340-5443 |
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Equine Behaviour @ team @ |
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5787 |
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| Author |
Dewsbury, D.A. |
| Title |
Comparative Psychology, Ethology, and Animal Behavior |
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Journal Article |
| Year |
1989 |
Publication |
Annual Review of Psychology |
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40 |
Issue |
1 |
Pages |
581-602 |
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no |
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refbase @ user @ |
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3541 |
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| Author |
Gallistel, C.R. |
| Title |
Animal Cognition: The Representation of Space, Time and Number |
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Journal Article |
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1989 |
Publication |
Annual Review of Psychology |
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40 |
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1 |
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155-189 |
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no |
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Equine Behaviour @ team @ |
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2972 |
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| Author |
Rubenstein, D.I.; Hohmann, M.E |
| Title |
Parasites and Social Behavior of Island Feral Horses |
Type |
Journal Article |
| Year |
1989 |
Publication |
Oikos |
Abbreviated Journal |
Oikos |
| Volume |
3 |
Issue |
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Pages |
312-320 |
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| Abstract |
The horses of Shackelford Banks, North Carolina, USA, are heavily parasitized by intestinal worms and harassed by dipterans, and although both types influence behavior only internal parasites affect bodily condition and the structuring of horse society. Thirteen species of internal parasites were identified, but only 4 of 13 groups contain them all and even within groups differences among individuals are large. Among individuals ova emissions vary ranging from 50 to 76,875 eggs per gram. The most important environmental factors influencing egg production are season and a group's location on the island, presumably because of salinity and soil differences and their effects on ova survival. Of the social and life history factors, age, and group size, but neither reproductive state nor dominance status are important. The fitness consequences of internal parasitism may be large since the number emitted is negatively correlated with next year's bodily condition. Biting fly burdens are also affected by a variety of environmental factors. In general, horses are covered with more flies on sunny days, when winds are moderately brisk, when occupying dunes, and around mid-day. In contrast to endoparasites, fly burden is affected by reproductive condition and dominance status and tends to decrease as groups increase in size. Since groups do not grow very large, nor do females attempt to bring groups together, the negative effects of endoparasites appear to overide those associated with ectoparasites. Consequently, endoparasites appear to exert a stronger influence on social structure, even though ectoparasites seem to play a stronger role in shaping details of behavior. |
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no |
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Equine Behaviour @ team @ |
Serial |
2360 |
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| Author |
Fragaszy, D.M.; Visalberghi E. |
| Title |
Social influences on the acquisition of tool-using behaviors in tufted capuchin monkeys (Cebus apella) |
Type |
Journal Article |
| Year |
1989 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J. Comp. Psychol. |
| Volume |
103 |
Issue |
2 |
Pages |
159-170 |
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To identify behaviors related to acquisition of tool-use in tufted capuchins (Cebus apella), we presented two tool-using tasks to two groups, extending findings by Westergaard and Fragaszy (1987) and Visalberghi (in press). Five Ss learned to use the tools in each task. The primary predictor of success was level of interest in the task. Observation of others at the apparatus did not facilitate exploratory behaviors or contact with the tools in the observers. Most animals performed exploratory behaviors more often when they were at the apparatus alone than when with another, whether or not the other was using a tool. Observers were quick to learn the relationship between another's activities and the appearance of food. We conclude that capuchins do not readily learn about instrumental relations by observation of others or imitate other's acts. Imitation probably plays no role in the spread of novel instrumental behaviors among monkeys. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
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social influences, acquisition of tool using |
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Equine Behaviour @ team @ |
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2993 |
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| Author |
Daniels, T.J.; Bekoff, M. |
| Title |
Feralization: The making of wild domestic animals |
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Journal Article |
| Year |
1989 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
19 |
Issue |
1-3 |
Pages |
79-94 |
| Keywords |
feralization; domestication; feral dogs |
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The widely accepted viewpoint that feralization is the reverse of domestication requires that the feralization process be restricted to populations of animals and, therefore, cannot occur in individuals. An alternative, ontogenetic approach is presented in which feralization is defined as the process by which individual domestic animals either become desocialized from humans, or never become socialized, and thus behave as untamed, non-domestic animals. Feralization will vary among species and, intraspecifically, will depend upon an individual's age and history of socialization to humans. Because feralization is not equated with morphological change resulting from evolutionary processes, species formation is not an accurate indicator of feral condition. |
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Cited By (since 1996): 5; Export Date: 24 October 2008 |
Approved |
no |
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Admin @ knut @ |
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4580 |
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Kondo, S.; Sekine, J.; Okubo, M.; Asahida, Y. |
| Title |
The effect of group size and space allowance on the agonistic and spacing behavior of cattle |
Type |
Journal Article |
| Year |
1989 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
24 |
Issue |
2 |
Pages |
127-135 |
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The number of agonistic encounters in a group (frequency per h) and the mean distance to the nearest neighbor in a group (m) were analyzed by a multiple regression on the group size (number of animals in a group) and space allowance (m3 per animal) in each group of calves (6–13 months old, Holstein female and castrated male) and adult cattle (2–12 years old, Holstein heifers and cows or Holstein and Hereford grazing beef cattle). A total of 196 calves and 602 adult animals were used in this analysis. In calves, a significant correlation was found between agonistic behavior and space allowance (r=-0.48, P<0.01), but not between agonistic behavior and group sizes. The mean distance to the nearest neighbor in calf groups increased as the group size decreased and space allowance increased (R2=0.66, P<0.01). In adult cattle, the number of agonistic encounters increased linearly as the group size increased (r=+0.37, P<0.05). The relationship between agonistic behavior and 1(space allowance)2 was significant (r=+0.48, P<0.05). The mean distance to the nearest neighbor tended to increase as the group size decreased and the space allowance increased (R2=0.68, P<0.01). When the space allowance increased beyond 360 m2 per animal, the average distance to the nearest neighbor in the adult group was maintained within the range of 10–12 m. |
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0168-1591 |
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no |
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Equine Behaviour @ team @ |
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5473 |
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Stahlbaum, C.C.; Houpt, K.A. |
| Title |
The role of the Flehmen response in the behavioral repertoire of the stallion |
Type |
Journal Article |
| Year |
1989 |
Publication |
Physiology & behavior |
Abbreviated Journal |
Physiol. Behav. |
| Volume |
45 |
Issue |
6 |
Pages |
1207-1214 |
| Keywords |
Animals; Behavior, Animal/*physiology; Circadian Rhythm; Discrimination (Psychology)/physiology; Estrus; Feces; Female; Horses/*physiology; Male; Sexual Behavior, Animal/*physiology; Smell/*physiology; Taste/physiology; Urine |
| Abstract |
The role of the Flehmen response in equine behavior was investigated under field and laboratory conditions. In Experiment 1, a field study made of five stallions on pasture with between three and eighteen mares each during the season indicated the following: 1) The Flehmen response was most frequently preceded by nasal, rather than oral, investigation of substances; 2) The stallions' rate of Flehmen varied with the estrous cycles of the mares; 3) The rate of Flehmen response did not show a variation with time of day; and 4) The Flehmen response was most frequently followed by marking behaviors rather than courtship behaviors. The results suggest that the Flehmen response is not an immediate component of sexual behavior, e.g., courtship of the stallion but may be involved in the overall monitoring of the mare's estrous cycle. Therefore the Flehmen response may contribute to the chemosensory priming of the stallion for reproduction. In Experiment 2 stallions were presented with urine or feces of mares in various stages of the reproductive cycle as well as with their own or other males' urine or feces. The occurrence of sniffing and Flehmen was used to determine the discriminatory ability of the stallions. Stallions can differentiate the sex of a horse on the basis of its feces alone, but cannot differentiate on the basis of urine. This ability may explain the function of fecal marking behavior of stallions. |
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New York State College of Veterinary Medicine, Cornell University, Ithaca 14853 |
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0031-9384 |
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PMID:2813545 |
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no |
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refbase @ user @ |
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44 |
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Visalberghi E; Trinca L |
| Title |
Tool use in capuchin monkeys: distinguishing between performing and understanding |
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Journal Article |
| Year |
1989 |
Publication |
Primates |
Abbreviated Journal |
Primates |
| Volume |
30 |
Issue |
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Pages |
511 |
| Keywords |
Tool use – Cebus apella – Mental representation |
| Abstract |
A horizontal plexiglas tube containing a food-reward was presented to four naive tufted capuchins and suitable sticks were provided to push the reward out. Three monkeys out of four spontaneously used the tools and showed very different styles of solving the task. In more complex conditions, in which the sticks needed to be combined or actively modified in order to become effective, the monkeys were always successful; however, their performance was loaded with errors which did not disappear throughout the trials. Evidence of a difference between success in solving the problem and its understanding was found. This suggests that although capuchins can discover new means through active experimentation, they do not mentally represent the characteristics necessary for a tool to be effective, nor do they modify the tool appropriately beforehand. At this level, a major difference with chimpanzees emerges. |
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Equine Behaviour @ team @ |
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3047 |
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