Records |
Author |
Short Rv, |
Title |
The evolution of the horse |
Type |
Journal Article |
Year |
1975 |
Publication |
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Abbreviated Journal |
J Reprod Fert Suppl |
Volume |
23 |
Issue |
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Pages |
1-6 |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
Call Number |
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Serial |
1589 |
Permanent link to this record |
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Author |
Syme, G.J.; Syme, L.A. |
Title |
The concept of spatial leadership in farm animals: An experiment with sheep |
Type |
Journal Article |
Year |
1975 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
Volume |
23 |
Issue |
Part 4 |
Pages |
921-925 |
Keywords |
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Abstract |
The concept of spatial leadership as applied to farm animals is discussed with particular emphasis on methodological problems. Using three experimental procedures forced spatial leadership orders were measured in a group of Romney ewes. Comparisons between orders showed the effects of both the different experimental tasks and the social context on leadership structure. Both these variables were found to affect the orders obtained. The results are interpreted in terms of the utility of the concept of spatial leadership in domestic animals and the necessity for more systematic procedural investigations in this area. |
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no |
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Serial |
2039 |
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Author |
Leuthold W, L.B. |
Title |
Temporal patterns of reproduction in ungulates of Tsavo East National Park Kenya |
Type |
Journal Article |
Year |
1975 |
Publication |
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Abbreviated Journal |
E Afr Wildl J |
Volume |
13 |
Issue |
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Pages |
159-170 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
Call Number |
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Serial |
1345 |
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Author |
Bayley, P.; Martin, S.; Anson, M. |
Title |
Temperature-jump circular dichroism: observation of chiroptical relaxation processes at millisecond time resolution |
Type |
Journal Article |
Year |
1975 |
Publication |
Biochemical and Biophysical Research Communications |
Abbreviated Journal |
Biochem Biophys Res Commun |
Volume |
66 |
Issue |
1 |
Pages |
303-308 |
Keywords |
*Alcohol Oxidoreductases/metabolism; Animals; Circular Dichroism; Horses; Kinetics; Liver/enzymology; Mathematics; Protein Conformation; Temperature; Time Factors |
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English |
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0006-291X |
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PMID:1172440 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
3816 |
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Author |
Klingel, H. |
Title |
Social organization and reproduction in equids |
Type |
Journal Article |
Year |
1975 |
Publication |
Journal of Reproduction and Fertility. Supplement |
Abbreviated Journal |
J Reprod Fertil Suppl |
Volume |
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Issue |
23 |
Pages |
7-11 |
Keywords |
Animals; Behavior, Animal; Female; Male; Perissodactyla/*physiology; Reproduction; *Sexual Behavior, Animal; Social Behavior; Territoriality |
Abstract |
There are two distinct types of social organization and, accordingly, two types of mating systems in equids. In the horse, Plains zebra and Mountain zebra, the adults live in non-territorial and cohesive one-male groups and in stallion groups. The family stallions have exclusive mating rights which are respected by all others. In Grevy's zebra and in the African and Asiatic wild asses, the stallions are permanently territorial and have exclusive mating rights within their territories. Ecological and evolutionary aspects are discussed. |
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0449-3087 |
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Notes |
PMID:1060868 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2303 |
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Author |
Zimen, E. |
Title |
Social dynamics of the wolf pack |
Type |
Book Chapter |
Year |
1975 |
Publication |
The wild canids |
Abbreviated Journal |
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Volume |
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Issue |
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Pages |
336-362 |
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Publisher |
Van Nostrand Reinhold |
Place of Publication |
New York |
Editor |
Fox, M.W. |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
5231 |
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Author |
Dunn, M.F.; Branlant, G. |
Title |
Roles of zinc ion and reduced coenzyme in horse liver alcohol dehydrogenase catalysis. The mechanism of aldehyde activation |
Type |
Journal Article |
Year |
1975 |
Publication |
Biochemistry |
Abbreviated Journal |
Biochemistry |
Volume |
14 |
Issue |
14 |
Pages |
3176-3182 |
Keywords |
*Alcohol Oxidoreductases/metabolism; Aldehydes/*pharmacology; Animals; Binding Sites; Enzyme Activation/drug effects; Horses; Hydrogen-Ion Concentration; Kinetics; Liver/enzymology; *NAD/analogs & derivatives/pharmacology; Oxidation-Reduction; Protein Binding; Spectrophotometry; Spectrophotometry, Ultraviolet; Temperature; *Zinc/pharmacology |
Abstract |
1,4,5,6-Tetrahydronicotinamide adenine dinucleotide (H2NADH) has been investigated as a reduced coenzyme analog in the reaction between trans-4-N,N-dimethylaminocinnamaldehyde (I) (lambdamax 398 nm, epsilonmax 3.15 X 10-4 M-minus 1 cm-minus 1) and the horse liver alcohol dehydrogenase-NADH complex. These equilibrium binding and temperature-jump kinetic studies establish the following. (i) Substitution of H2NADH for NADH limits reaction to the reversible formation of a new chromophoric species, lambdamax 468 nm, epsilonmax 5.8 x 10-4 M-minus 1 cm-minus 1. This chromophore is demonstrated to be structurally analogous to the transient intermediate formed during the reaction of I with the enzyme-NADH complex [Dunn, M. F., and Hutchison, J. S. (1973), Biochemistry 12, 4882]. (ii) The process of intermediate formation with the enzyme-NADH complex is independent of pH over the range 6.13-10.54. Although studies were limited to the pH range 5.98-8.72, a similar pH independence appears to hold for the H2NADH system. (iii) Within the ternary complex, I is bound within van der Waal's contact distance of the coenzyme nicotinamide ring. (iv) Formation of the transient intermediate does not involve covalent modification of coenzyme. Based on these findings, we conclude that zinc ion has a Lewis acid function in facilitating the chemical activation of the aldehyde carbonyl for reduction, and that reduced coenzyme plays a noncovalent effector role in this substrate activating step. |
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ISSN |
0006-2960 |
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Notes |
PMID:238585 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
3817 |
Permanent link to this record |
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Author |
Feist, J.D.; McCullough, D.R. |
Title |
Reproduction in feral horses |
Type |
Journal Article |
Year |
1975 |
Publication |
Journal of Reproduction and Fertility. Supplement |
Abbreviated Journal |
J Reprod Fertil Suppl |
Volume |
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Issue |
23 |
Pages |
13-18 |
Keywords |
Age Factors; Animals; Female; Horses/*physiology; Leadership; Male; Maternal Behavior; Population; Reproduction; *Sexual Behavior, Animal; Social Dominance; Sucking Behavior |
Abstract |
A behavioural study of feral horses was conducted on the Pryor Mountain Wild Horse Range in the western United States. All 270 horses on the Range were identified individually. The sex ratio was nearly balanced. Foal to adult female ratio was 43-2:100. Morality was concentrated among foals and old horses. Horses were organized as forty-four harem groups each with a dominant stallion, one to two immature stallions, one to three immature mares, one to three adult mares and their yearling and foal offspring, and 23 bachelor groups of one to eight stallions. Harem groups were quite stable year-round because of dominance and leadership by the stallions and group fidelity by mares and their offsring. Most changes occurred during the breeding season and involved immature females. Defeat of dominant stallions was infrequent. Immature males were tolerated because of their submissive behaviour. Bachelor stallion groups were inherently unstable. Mares came into heat after foaling in May/June, and were mated by harem stallions only. |
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0449-3087 |
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Notes |
PMID:1060766 |
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no |
Call Number |
refbase @ user @ |
Serial |
1964 |
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Author |
Bannikov, A.G. |
Title |
Recent status of the wild ass in Mongolia |
Type |
Journal Article |
Year |
1975 |
Publication |
IUCN Bulletin |
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Volume |
6 |
Issue |
4 |
Pages |
16 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2219 |
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Author |
Smuts Gl, |
Title |
Pre – and postnatal growth phenomena of Burchell's Zebra, Equus Burchelli Antiquorum |
Type |
Journal Article |
Year |
1975 |
Publication |
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Abbreviated Journal |
Koedoe |
Volume |
18 |
Issue |
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Pages |
69-102 |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
Call Number |
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Serial |
1613 |
Permanent link to this record |