| Records |
| Author |
Syme, G.J. |
| Title |
Competitive orders as measures of social dominance |
Type |
Journal Article |
Year  |
1974 |
Publication |
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Abbreviated Journal |
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| Volume |
22 |
Issue |
Part 4 |
Pages |
931-940 |
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| Abstract |
The use of competitive orders as measures of social dominance is examined, the conclusion being that such use is based on the assumption of the unidimensionality of social dominance. Evidence is presented to show that this is not always the case. Consequently it is suggested that each competitive order must be validated in terms of its measurement of priority of access and response requirements (internal validity) as well as its generality (external validity) before it can be regarded as a dominance measure. Problems of the validity of aggression orders as measures of social dominance are also examined along with their relationship to competitive orders. |
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| Call Number |
Equine Behaviour @ team @ |
Serial |
2188 |
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| Author |
Mirzaeva, A.G. |
| Title |
[Age makeup of female Culicoides sinanoensis Tok. in the coniferous-broad-leaved forest zone of the southern Maritime Territory] |
Type |
Journal Article |
| Year |
1974 |
Publication |
Parazitologiia |
Abbreviated Journal |
Parazitologiia |
| Volume |
8 |
Issue |
6 |
Pages |
524-530 |
| Keywords |
Age Factors; Animals; *Ceratopogonidae/physiology; Corpus Luteum/physiology; Ecology; Female; Horses/parasitology; Humans; Ovulation; Pigments, Biological/physiology; Seasons; Siberia; Trees |
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Russian |
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Original Title |
Vozrastnoi sostav samok Culicoides sinanoensis Tok. v zone khvoino-shirokolistvennykh lesov Iuzhnogo Primor'ia |
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0031-1847 |
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PMID:4449654 |
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no |
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Equine Behaviour @ team @ |
Serial |
2707 |
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| Author |
Davies, R.B.; Clark, G.G. |
| Title |
Trypanosomes from elk and horse flies in New Mexico |
Type |
Journal Article |
| Year |
1974 |
Publication |
Journal of Wildlife Diseases |
Abbreviated Journal |
J Wildl Dis |
| Volume |
10 |
Issue |
1 |
Pages |
63-65 |
| Keywords |
Animals; *Artiodactyla; Blood/microbiology; *Diptera; Ecology; *Insect Vectors; New Mexico; Trypanosoma/*isolation & purification; Trypanosomiasis/microbiology/*veterinary |
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English |
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0090-3558 |
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| Notes |
PMID:4810218 |
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no |
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Equine Behaviour @ team @ |
Serial |
2709 |
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| Author |
Parker, G.A. |
| Title |
Assessment strategy and the evolution of fighting behaviour |
Type |
Journal Article |
| Year |
1974 |
Publication |
Journal of Theoretical Biology |
Abbreviated Journal |
J. Theor. Biol. |
| Volume |
47 |
Issue |
1 |
Pages |
223-243 |
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| Abstract |
The view is examined that the adaptive value of conventional aspects of fighting behaviour is for assessment of relative RHP (resource holding power) of the combatants. Outcomes of aggressive disputes should be decided by each individual's fitness budget available for expenditure during a fight (determined by the fitness difference between adoption of alternative strategies, escalation or withdrawal without escalation) and on the rate of expenditure of the fitness budget if escalation occurs (determined by the RHPs of the combatants). Thus response thresholds for alternative strategies (“assessments”) will be determined by natural selection on a basis of which opponent is likely to expend its fitness budget first, should escalation occur. This “loser” should retreat (before escalation) and the winner should stay in possession of the resource. Many aggressive decisions depend on whether one is a resource holder, or an attacker. Assuming the RHP of the combatants to be equal, there are many instances of fitness pay-off imbalances between holder and attacker which should weight the dispute outcome in favour of one or other opponent by allowing it a greater expendable fitness budget. Usually the weighting favours the holder; the attacker therefore needs a correspondingly higher RHP before it may be expected to win. This is not invariably the case, and much observed data fits the predictions of this sort of model. If assessments are perfect and budget expenditure rates exactly predictable, then there would never seem to be any case for escalation. Escalation can be explained in terms of injury inflictions (expenditures) occurring as discrete events; i.e. as “bouts” won or lost during fighting. Assessment can give only a probabilistic prediction of the outcome of a bout. A simple model is developed to investigate escalation situations. Each combatant assesses relative RHP; this correlates with an absolute probability of winning the next bout (cabs). The stake played for is infliction of loss of RHP and is determined by the fitness budgets of the opponents. (Each individual plays for the withdrawal of its opponent.) This defines a critical probability of winning (ccrit) for each combatant, above which escalation is the favourable strategy (cabs > ccrit) and below which withdrawal is favourable (cabs < ccrit). Escalation should occur only where cabs-ccrit is positive for both combatants. This model gives predictions compatible with the observations, indicating that RHP loss alone can be adequate to explain withdrawal: escalation behaviour. Withdrawal tendency will be increased by low searching costs. Escalations should be restricted to closely matched RHP opponents if RHP disparity is the major imbalance. Outside the “escalation range” of a given individual, the higher RHP individual wins and the lower one loses (i.e. it should withdraw after conventional display). RHP disparity and holder: attacker imbalance should both interact to shape the observed pattern, though their relative importances will depend on species and situation. In some instances selection may favour immediate withdrawal from an occupied territory even without assessment of RHP. |
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0022-5193 |
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no |
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Equine Behaviour @ team @ |
Serial |
4935 |
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| Author |
Schmoldt, A.; Benthe, H.F.; Haberland, G. |
| Title |
Digitoxin metabolism by rat liver microsomes |
Type |
Journal Article |
| Year |
1975 |
Publication |
Biochemical pharmacology |
Abbreviated Journal |
Biochem Pharmacol |
| Volume |
24 |
Issue |
17 |
Pages |
1639-1641 |
| Keywords |
Animals; Chromatography, Thin Layer; Digitoxigenin/metabolism; Digitoxin/*metabolism; Hydroxylation; Male; Microsomes, Liver/*metabolism; NADP/metabolism; Rats; Time Factors |
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0006-2952 |
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PMID:10 |
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no |
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Admin @ knut @ |
Serial |
20 |
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| Author |
Douglas Rh, G.O. |
| Title |
Development of the equine fetus and placenta |
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Journal Article |
| Year |
1975 |
Publication |
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Abbreviated Journal |
J Reprod Fert (Suppl) |
| Volume |
23 |
Issue |
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Pages |
495-498 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1023 |
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| Author |
Imesh Gd, S.G. |
| Title |
Gross and microscopic observations of ovarian abnormalities from five Burchell's zebra |
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Journal Article |
| Year |
1975 |
Publication |
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Onderstepoort J vet Res |
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42 |
Issue |
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Pages |
109-116 |
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from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1213 |
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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 |
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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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2039 |
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| Author |
Wagner, G. |
| Title |
[Flight leadership in flocks of homing pigeons] |
Type |
Journal Article |
| Year |
1975 |
Publication |
Zeitschrift für Tierpsychologie |
Abbreviated Journal |
Z. Tierpsychol. |
| Volume |
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Issue |
39 |
Pages |
61-74 |
| Keywords |
Animals; *Columbidae; *Flight, Animal; *Orientation |
| Abstract |
Groups of 3-5 homing pigeons individually recognizable by different colours of their plumage were followed by helicopter on their way home. In most cases the animals flew together as a group with frequently changing leadership. Flight formations in terms of leadership were noted every minute. It was examined statistically whether the flight order varies at random or whether there are leading and led birds. In 6 out of 7 experiments with groups of 4-5 pigeons flight order was far from random, one or two pigeons proving to be leaders. In only one experiment leadership did not differ from a random distribution. No correlation could be found between the tendency to lead within a group and homing performance of the single pigeon when released individually. |
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German |
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Original Title |
Zur Frage des Flugfuhrens in heimkehrenden Brieftaubengruppen |
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0044-3573 |
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PMID:1231423 |
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no |
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Serial |
2050 |
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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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Equine Behaviour @ team @ |
Serial |
2219 |
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