| Records |
| Author |
Cheney, D.L.; Seyfarth, R.M. |
| Title |
Reconciliation and redirected aggression in vervet monkeys, Behaviour |
Type |
Journal Article |
| Year |
1989 |
Publication |
Behaviour |
Abbreviated Journal |
Behaviour |
| Volume |
110 |
Issue |
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Pages |
258-275 |
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Equine Behaviour @ team @ |
Serial |
4865 |
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| Author |
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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| Abstract |
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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Equine Behaviour @ team @ |
Serial |
5473 |
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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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| Abstract |
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 @ |
Serial |
5787 |
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| Author |
Galef, B.G. |
| Title |
Enduring social enhancement of rats' preferences for the palatable and the piquant |
Type |
Journal Article |
| Year |
1989 |
Publication |
Appetite |
Abbreviated Journal |
Appetite |
| Volume |
13 |
Issue |
2 |
Pages |
81-92 |
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| Abstract |
In three experiments on the social induction of food preferences in rats, I found: (a) that eight 30-min exposures of a naive “observer” rat to a “demonstrator” rat fed one of two approximately equipalatable diets produced observer preference for the diet fed to its demonstrator that lasted for more than a month, (b) that simple exposure of naive subjects to a diet itself, rather than to a rat that had eaten a diet, was not sufficient to enhance preference for that diet, and (c) that lasting preference for an unpalatable, piquant diet could also be established by exposing naive rats to demonstrators that had eaten the piquant diet, but not by simply exposure to the piquant diet itself. These findings are consistent with the hypothesis proposed by both Birch and Rozin that social-affective contexts are important in establishing stable, learned preferences for foods. |
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0195-6663 |
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Equine Behaviour @ team @ |
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6567 |
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Duncan, I.J.H.; Petherick, J.C. |
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Proceeding (Paper presented at the Winter Meeting of the Society for Veterinary Ethology, London, Great Britain, 30 November 1988)Cognition: The implications for animal welfare |
Type |
Journal Article |
| Year |
1989 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
24 |
Issue |
1 |
Pages |
81-1010 |
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Equine Behaviour @ team @ |
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2921 |
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| Author |
Walker, S. |
| Title |
An introduction to animal cognition : By . Hillsdale, New Jersey: Lawrence Erlbaum (1988). Pp. viii + 328. Price [pound sign]8.95 paperback |
Type |
Journal Article |
| Year |
1989 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
37 |
Issue |
Part 3 |
Pages |
521-522 |
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Equine Behaviour @ team @ |
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2922 |
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| Author |
Chandler M; Fritz AS; Hala S |
| Title |
Small scale deceit: deception marker of 2-, 3- and 4-year-olds' early theories of mind |
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Journal Article |
| Year |
1989 |
Publication |
Child Dev. |
Abbreviated Journal |
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60 |
Issue |
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Pages |
1263 |
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Equine Behaviour @ team @ |
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2986 |
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| Author |
Povinelli DJ |
| Title |
Failure to find self-recognition in Asian elephants (Elephas maximus) in contrast to their use of mirror cues to discover hidden food |
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Journal Article |
| Year |
1989 |
Publication |
J. Comp. Psychol. |
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| Volume |
103 |
Issue |
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122 |
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Equine Behaviour @ team @ |
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3026 |
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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 @ |
Serial |
3541 |
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| Author |
Huizinga, H.A.; van der Meij, G.J.W. |
| Title |
Estimated parameters of performance in jumping and dressage competition of the Dutch Warmblood horse |
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Journal Article |
| Year |
1989 |
Publication |
Livestock Production Science |
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21 |
Issue |
4 |
Pages |
333-345 |
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The objective of this study is to estimate several genetic parameters in the Dutch Warmblood riding horse population. The traits involved are performances in jumping and dressage competition. The following parameters are estimated: heritabilities for jumping and dressage; phenotypic and genetic correlations between jumping and dressage; and phenotypic and genetic correlations between performances at different ages. These parameters are estimated by restricted maximum likelihood (REML). Data are from 6899 horses with performances in jumping and 10 408 horses with performances in dressage competition. The horses are sired by 205 and 237 stallions for the two traits, respectively. The progeny range in age from 4 to 8 years old. The performance trait is a cumulatively derived score, that reflects the level of performance in competition. A square root transformation of the score is most appropriate to normalize the data. For estimation of phenotypic and genetic parameters the data is split into two data sets according to the age of the sires (offspring sired by older vs. younger stallions). For estimating correlations between performances at 4, 5 and 6 years of age, performances of the offspring out of previous years are linked to the data. The most unbiased estimates of heritability for jumping and dressage are from data derived from the youngest offspring sired by the younger stallions and are 0.20 and 0.10, respectively. Genetic correlation between jumping and dressage ranges from -0.27 to 0.10. The phenotypic correlation between these traits ranges from 0.15 to 0.26. Phenotypic and genetic correlations between performances at 4, 5 and 6 years average 0.95 and 0.75, respectively. These latter results have important implications for genetic evaluation of breeding candidates in the population. |
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refbase @ user @ |
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3966 |
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