| Records |
| Author |
Bernstein, I.S.; Dobrofsky, M. |
| Title |
Compensatory social responses of older pigtailed monkeys to maternal separation |
Type |
Journal Article |
| Year |
1981 |
Publication |
Developmental Psychobiology |
Abbreviated Journal |
Dev Psychobiol |
| Volume |
14 |
Issue  |
2 |
Pages |
163-168 |
| Keywords |
Animals; Dependency (Psychology); Female; Macaca nemestrina; Male; *Maternal Deprivation; *Social Behavior |
| Abstract |
Thirteen 3-5-year-old pigtailed monkeys were subjected to five 2-hr maternal separations while remaining in their normal social group. Significant changes in activity profiles were noted during separation and reunion phases. This suggests the continued social dependence of older offspring upon the matriarch. The shift in social activities reflected attempts by the juvenile and adolescent subjects to compensate for maternal absence by intensification of other affiliative social behavior and avoidance of potentially socially disruptive situation. The subjects oriented more towards kin in the absence of the matriarch, but actual time with kin decreased. Upon the return of the matriarch, the intensified some responses depressed during her absence and returned to preseparation social relationships. Play and aggressive responses declined whereas social approaches increased during maternal absences. Submissive responses declined upon the return of the matriarch, and play increased. The subjects also showed a marked, temporary increase of direct interaction, largely sniffing and grooming, with the matriarch upon her return. |
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0012-1630 |
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| Notes |
PMID:7202854 |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4171 |
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| Author |
Barnard, C.J.; Sibly, R.M. |
| Title |
Producers and scroungers: A general model and its application to captive flocks of house sparrows |
Type |
Journal Article |
| Year |
1981 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
29 |
Issue |
2 |
Pages |
543-550 |
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| Abstract |
Many forms of interaction within and between species appear to be based on `scrounger' individuals or species exploiting a limited resource provided `producers'. A mathematical model is presented which shows whether or not scroungers are maintained in a group, depending on their frequency and the group size. Some of the predictions of the model were tested in captive flocks of house sparrows Passer domesticus L. Here the scroungers obtained most of their food (mealworms) by interaction and the producers found most of their food by actively foraging: the pay-off to each type was measured as mealworm capture rate. Neither type changed strategy opportunistically in response to instantaneous flock composition but, not surprisingly, scroungers fared better when one of more producers were present. However, scrougers did much worse than expected when greatly outnumbered by producers, perhaps because producers then found the available food very quickly. |
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no |
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Equine Behaviour @ team @ |
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4200 |
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| Author |
Partridge, B.L. |
| Title |
Internal dynamics and the interrelations of fish in schools |
Type |
Journal Article |
| Year |
1981 |
Publication |
Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology |
Abbreviated Journal |
J Comp Physiol Sensory Neural Behav Physiol |
| Volume |
144 |
Issue |
3 |
Pages |
313-325 |
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| Abstract |
The three-dimensional structure of schools of saithe (Pollachius virens) and the interactions between individuals over time were analyzed in 12,240 frames of videotape sampled at 2.7 Hz. Time series analyses of the interactions between identified individuals allowed testing of assumptions of anonymity vs. leadership in schools and investigation of the transfer of information between individuals by which collective decisions are made. Results include the following:1.Saithe match changes in both swimming direction and speed of their neighbors but correlations are greater for swimming speed. Average speed of the school does not greatly affect correlations between neighboring fish although the reaction latencies may be somewhat increased. As shown previously (Partridge et al. 1980) nearest neighbor distance (NND) decreases with increasing school velocity.2.Saithe simultaneously match the headings and swimming speeds of at least their first two nearest neighbors within the school (NN1 and NN2). Partialling out the correlation between a fish's neighbors demonstrates that a fish's correlation to his second nearest neighbor (NN2) is not simply a transitive function of mutual correlation between the NN1 and NN2.3.Several sources of individual variation in schooling performance were examined. In all respects except one, that of preferred positions within the school, saithe showed no individual differences, i.e., some were not “better schoolers” than others. Although fish in the school differed in length by up to a factor of 2.5, no size related effects in NND or nearest neighbor positioning were found.4.Single Linkage Cluster Analysis (SLCA) of the cross-correlations of fishs' swimming speeds and directions demonstrated quantitatively the existence of subgroups within schools if they contain more than 10-11 members. Subgroups acting more-or-less independently in terms of short term variations in speed and direction nonetheless remained within the school as a whole and were not often apparent to observers since members of one group interdigitated with those of another. How individuals know to which subgroup they belong remains unanswered. |
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no |
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2063 |
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| Author |
Andersson, P.; Kvassman, J.; Lindstrom, A.; Olden, B.; Pettersson, G. |
| Title |
Effect of NADH on the pKa of zinc-bound water in liver alcohol dehydrogenase |
Type |
Journal Article |
| Year |
1981 |
Publication |
European Journal of Biochemistry / FEBS |
Abbreviated Journal |
Eur J Biochem |
| Volume |
113 |
Issue |
3 |
Pages |
425-433 |
| Keywords |
Alcohol Oxidoreductases/*metabolism; Aldehydes/metabolism; Animals; Binding Sites; Cinnamates/metabolism; Horses; Hydrogen-Ion Concentration; Kinetics; Ligands; Liver/*metabolism; NAD/*metabolism; Water/metabolism; Zinc/metabolism |
| Abstract |
Equilibrium constants for coenzyme binding to liver alcohol dehydrogenase have been determined over the pH range 10--12 by pH-jump stop-flow techniques. The binding of NADH or NAD+ requires the protonated form of an ionizing group (distinct from zinc-bound water) with a pKa of 10.4. Complex formation with NADH exhibits an additional dependence on the protonation state of an ionizing group with a pKa of 11.2. The binding of trans-N,N-dimethylaminocinnamaldehyde to the enzyme . NADH complex is prevented by ionization of the latter group. It is concluded from these results that the pKa-11.2-dependence of NADH binding most likely derives from ionization of the water molecule bound at the catalytic zinc ion of the enzyme subunit. The pKa value of 11.2 thus assigned to zinc-bound water in the enzyme . NADH complex appears to be typical for an aquo ligand in the inner-sphere ligand field provided by the zinc-binding amino acid residues in liver alcohol dehydrogenase. This means that the pKa of metal-bound water in zinc-containing enzymes can be assumed to correlate primarily with the number of negatively charged protein ligands coordinated by the active-site zinc ion. |
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0014-2956 |
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| Notes |
PMID:7011796 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
3810 |
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| Author |
Hoff, M.P.; Nadler, R.D.; Maple, T.L. |
| Title |
Development of infant independence in a captive group of lowland gorillas |
Type |
Journal Article |
| Year |
1981 |
Publication |
Developmental Psychobiology |
Abbreviated Journal |
Dev Psychobiol |
| Volume |
14 |
Issue |
3 |
Pages |
251-265 |
| Keywords |
Animals; *Dependency (Psychology); Female; Gorilla gorilla/*growth & development; Male; Maternal Behavior; *Personality; Sex Factors; Social Behavior; Weaning |
| Abstract |
In March 1976, 3 lowlands gorillas (Gorilla gorilla gorilla) were born to primiparous females living with an adult male in a large compound at the field station of the Yerkes Regional Primate Research Center of Emory University. Observations of parent and infant behavior began at the birth of the infants, using several methods of data collection. This report focuses on the development of independence in these infants over the 1st 1 1/2 years of life. As expected, measures of mother-infant contact and proximity decreased with age. Several measures suggested that infant independence developed as an interactive process between mothers and infants, with primary responsibility changing over the months of study. Maternal behaviors that served to maintain mother-infant contact were found to decrease with age, with an eventual shift to infant responsibility for contact maintenance. Additionally, the adult male appeared to influence developing independence as reflected in the maternal protectiveness evoked by his behavior. |
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0012-1630 |
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| Notes |
PMID:7262467 |
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no |
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Equine Behaviour @ team @ |
Serial |
4170 |
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| Author |
Joynson, R. B. |
| Title |
Towards understanding relationships, by Robert A. Hinde. London: Academic, 1979, pp xii + 367 |
Type |
Journal Article |
| Year |
1981 |
Publication |
Aggressive Behavior |
Abbreviated Journal |
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7 |
Issue |
3 |
Pages |
275-280 |
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Equine Behaviour @ team @ |
Serial |
4813 |
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| Author |
Mace, G.M.; Harvey, P.H.; Clutton-Brock, T.H. |
| Title |
Brain size and ecology in small mammals |
Type |
Journal Article |
| Year |
1981 |
Publication |
Journal of Zoology |
Abbreviated Journal |
J Zool |
| Volume |
193 |
Issue |
3 |
Pages |
333-354 |
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| Abstract |
Relative brain size (measured as gross brain size after body size effects are removed) differs systematically between families of rodents, insectivores and lagomorphs. The Sciuridae have the largest relative brain size, the Soricidae and Bathyergidae the smallest. These results are discussed and compared with previous analyses of relative brain sizes among primates and bats. These differences complicate comparisons between relative brain size across phylogenetically diverse species and attempts to relate differences in relative brain size to ecological variables. To overcome these problems, best fit relationships were estimated for each family, and values for each genus were expressed as deviations from the lines of best fit. We refer to these values as Comparative Brain Size (CBS). Differences in CBS are related to differences in habitat type (forest-dwelling genera have larger CBS' than grassland forms), in diet (folivores have smaller CBS' than generalists or insectivores, frugivores and granivores), in zonation (arboreal genera have larger CBS' than terrestrial ones) and in activity timing (nocturnal genera have larger CBS' than dirurnal ones). However, these ecological categories are interrelated and, when the effects of other ecological differences are taken into account using analyses of variance, only the differences associated with diet, and possibly habitat remain. |
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Blackwell Publishing Ltd |
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1469-7998 |
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no |
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Equine Behaviour @ team @ |
Serial |
5455 |
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| Author |
Cambefort, J.P. |
| Title |
A comparative study of culturally transmitted patterns of feeding habits in the chacma baboon Papio ursinus and the vervet monkey Cercopithecus aethiops |
Type |
Journal Article |
| Year |
1981 |
Publication |
Folia Primatologica; International Journal of Primatology |
Abbreviated Journal |
Folia Primatol (Basel) |
| Volume |
36 |
Issue |
3-4 |
Pages |
243-263 |
| Keywords |
Age Factors; Animals; *Cercopithecus; *Cercopithecus aethiops; Culture; *Feeding Behavior; Female; Group Structure; Learning; Male; *Papio; Social Class; Teaching |
| Abstract |
Japanese workers have studied social acquisition patterns of new feeding habits in Macaca fuscata which they have termed precultural. The present study investigates the same phenomenon in the chacma baboon and the vervet monkey in their natural habitat. The questions addressed are: (1) How a new feeding habit enters a troop and by which age and sex category, also how it is propagated? (2) When individuals are permitted with a choice between palatable and unpalatable food, can they learn by demonstration only or do they have to pass through a direct learning process? (3) Can the results from the above questions be explained by social parameters such as the social structure of the individual species? It was found that juvenile baboons discover new food and that after the discovery propagation is instantaneous. In vervets discovery is random among the age classes and propagation is slow and takes place through certain 'pivot' individuals. Both species fail to learn about palatability by demonstration but have to go through a direct learning process. This contrasts strongly with the forest baboon Mandrillus sphinx that have been shown to learn by demonstration. Socially, baboon juveniles stay closer to each other than the adults who force them to live at the periphery of the troop. Vervets again forage without precise sub-group formation. The link between social and cultural propagation and social structure is discussed on the basis of these findings. |
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0015-5713 |
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PMID:7319426 |
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no |
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2087 |
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McCall, C.A.; Potter, G.D.; Friend, T.H.; Ingram, R.S. |
| Title |
Learning abilities in yearling horses using the Hebb-Williams closed field maze |
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Journal Article |
| Year |
1981 |
Publication |
J. Anim. Sci. |
Abbreviated Journal |
J. Anim. Sci. |
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53 |
Issue |
4 |
Pages |
928-933 |
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Cited By (since 1996): 9; Export Date: 24 October 2008 |
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no |
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Admin @ knut @ |
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4613 |
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Axelrod, R.; Hamilton, W.D. |
| Title |
The evolution of cooperation |
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Journal Article |
| Year |
1981 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
211 |
Issue |
4489 |
Pages |
1390-1396 |
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Cooperation in organisms, whether bacteria or primates, has been a difficulty for evolutionary theory since Darwin. On the assumption that interactions between pairs of individuals occur on a probabilistic basis, a model is developed based on the concept of an evolutionarily stable strategy in the context of the Prisoner's Dilemma game. Deductions from the model, and the results of a computer tournament show how cooperation based on reciprocity can get started in an asocial world, can thrive while interacting with a wide range of other strategies, and can resist invasion once fully established. Potential applications include specific aspects of territoriality, mating, and disease. |
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10.1126/science.7466396 |
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Equine Behaviour @ team @ |
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4933 |
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