| Records |
| Author |
Boice, R. |
| Title |
Behavioral comparability of wild and domesticated rats |
Type |
Journal Article |
| Year |
1981 |
Publication |
Behavior Genetics |
Abbreviated Journal |
Behav Genet |
| Volume |
11 |
Issue |
5 |
Pages  |
545-553 |
| Keywords |
Animals; *Behavior, Animal; Female; Genetics, Behavioral; Intelligence; Learning; Male; Rats/*genetics |
| Abstract |
The oft-repeated concern for the lack of behavioral comparability of domestic rats with wild forms of Rattus norvegicus is unfounded. Laboratory rats appear to show the potential for all wild-type behaviors, including the most dramatic social postures. Moreover, domestics are capable of assuming a feral existence without difficulty, one where they readily behave in a fashion indistinguishable from wild rats. The one behavioral difference that is clearly established concerns performance in laboratory learning paradigms. The superiority of domestics in these laboratory tasks speaks more to quieting the concerns of degeneracy theorists than to problems of using domestic Norway rats as subjects representative of their species. |
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English |
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| ISSN |
0001-8244 |
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| Notes |
PMID:7325955 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4144 |
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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 @ |
Serial |
4200 |
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| Author |
Bruns, E. |
| Title |
Estimation of the breeding value of stallions from the tournament performance of their offspring |
Type |
Journal Article |
| Year |
1981 |
Publication |
Livestock Production Science |
Abbreviated Journal |
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| Volume |
8 |
Issue |
5 |
Pages |
465-473 |
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| Abstract |
Data from horse-riding competitions recorded in Germany in 1976 and 1977 have been analysed to estimate genetic parameters for performance traits of riding horses measured in dressage, jumping competitions and trials. The performance traits analysed were logarithmic earnings per start, relative place number, and place value. The results are the following. 1. (1) Heritability and repeatability estimates for performance in dressage shows are 0.2 and 0.4 respectively. Corresponding estimates for performance in jumping competitions are 20% less. No genetic differences are found between stallions for performance in trials.2. (2) A selection index for estimating the breeding value of stallions was constructed by using the repeated performances of their offspring in dressage and jumping shows. For this purpose, performance data for at least ten progeny should be available. The correlation between the breeding values estimated from the dressage and jumping performances of the same stallions was approximately zero.3. (3) Reliable progeny-testing requires that the assumptions of mating stallions at random, selecting progeny randomly, and distributing them equally across environmental effects be fulfilled.4. (4) The genetic use of breeding values of stallions estimated from the performance of their progeny is opposed by the prolongation of the generation interval. This can be partly overcome by sampling young stallions and making use of the test results for young progeny only. |
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no |
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refbase @ user @ |
Serial |
3968 |
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| Author |
Gingerich Pd, |
| Title |
Variation, sexual dimorphism, and social structure in the early Eocene horse Hyracotherium |
Type |
Journal Article |
| Year |
1981 |
Publication |
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Abbreviated Journal |
Paleobiol |
| Volume |
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Issue |
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Pages |
443-455 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1110 |
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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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English |
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| ISSN |
0014-2956 |
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| Notes |
PMID:7011796 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
3810 |
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| Author |
Waage Jk, |
| Title |
How the zebra got its stripes – biting flies as selective agents in the evolution of zebra coloration |
Type |
Journal Article |
| Year |
1981 |
Publication |
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Abbreviated Journal |
J ent Soc S Afr |
| Volume |
44 |
Issue |
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Pages |
351-358 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1685 |
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| Author |
Miller, R. |
| Title |
Male aggression, dominance and breeding behaviour in Red Desert feral horses |
Type |
Journal Article |
| Year |
1981 |
Publication |
Zeitschrift fur Tierpsychologie |
Abbreviated Journal |
Z. Tierpsychol. |
| Volume |
57 |
Issue |
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Pages |
340-201 |
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no |
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Equine Behaviour @ team @ |
Serial |
2374 |
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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 |
Houpt, K.A. |
| Title |
Equine behavior problems in relation to humane management |
Type |
Journal Article |
| Year |
1981 |
Publication |
Int. J. Stud. Anim Prob. |
Abbreviated Journal |
Int. J. Stud. Anim. Prob. |
| Volume |
2 |
Issue |
6 |
Pages |
329-337 |
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Cited By (since 1996): 7; Export Date: 21 October 2008 |
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no |
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Equine Behaviour @ team @ |
Serial |
4521 |
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| Author |
Groves Cp, W.D. |
| Title |
Studies on the taxonomy and phylogeny of the genus Equus |
Type |
Journal Article |
| Year |
1981 |
Publication |
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Abbreviated Journal |
Mammalia |
| Volume |
45 |
Issue |
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Pages |
321-354 |
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from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1137 |
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