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Author |
Drevemo, S.; Fredricson, I.; Hjertén, G.; McMIKEN, D. |
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Title |
Early development of gait asymmetries in trotting Standardbred colts |
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Journal Article |
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Year |
1987 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine. Vet. J. |
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Volume  |
19 |
Issue |
3 |
Pages |
189-191 |
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Abstract |
Summary Ten trotting Standardbred colts were recorded by high-speed cinematography at the ages of eight, 12 and 18 months. The horses were trotting on a treadmill operating at 4.0 m/secs. Five horses were subjected to a programme of intensified training from eight months of age, whereas the others were not trained and acted as controls. The films were analysed on a semi-automatic film-reading equipment and a number of variables used to demonstrate the gait symmetry were calculated and scaled by computer. Certain differences between left and right diagonal and contralateral pair of limbs, respectively, were noted, suggesting that laterality in horses may be inherited. The most pronounced systematic differences were found in 18-month old horses in the trained group. The results show the importance of careful gait examination and comprehensive coordination training at an early age. |
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American Medical Association (AMA) |
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ISSN |
0425-1644 |
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https://doi.org/10.1111/j.2042-3306.1987.tb01373.x |
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Call Number |
Equine Behaviour @ team @ |
Serial |
6702 |
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Author |
Deuel, N.R.; Lawrence, L.M. |
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Title |
Laterality in the gallop gait of horses |
Type |
Journal Article |
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Year |
1987 |
Publication |
Journal of biomechanics |
Abbreviated Journal |
J Biomech |
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Volume |
20 |
Issue |
6 |
Pages |
645-649 |
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Keywords |
Animals; *Functional Laterality; *Gait; Horses/*physiology; Kinesis |
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Abstract |
Bilateral asymmetry in gallop stride limb contact patterns of four Quarter Horse fillies was documented by high-speed cinematography. Horses were filmed with rider by two cameras simultaneously while galloping along a straightaway. Even though signaled for each gallop lead an equivalent number of times, horses frequently switched leads, selecting the left lead nearly twice as often as the right. Velocities and stride lengths were greater for the left lead than the right, but stride frequencies did not differ between leads. Velocity effects were partitioned out in limb contact data analysis to enable the determination of persistent gallop stride asymmetries. The contact duration for the trailing (right) fore limb on the left lead exceeded the contact duration for the trailing (left) fore limb on the right lead. Selecting the right fore limb as the trailing fore limb may have allowed horses to use it to withstand the greater stresses and caused them to preferentially gallop with the left fore limb leading. Laterality may have an important influence on equine gallop motion patterns and thereby influence athletic performance. |
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English |
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0021-9290 |
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Notes |
PMID:3611140 |
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Call Number |
refbase @ user @ |
Serial |
528 |
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Author |
Hunte, W.; Horrocks, J.A. |
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Title |
Kin and non-kin interventions in the aggressive disputes of vervet monkeys |
Type |
Journal Article |
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Year |
1987 |
Publication |
Behav. Ecol. Sociobiol. |
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Volume |
20 |
Issue |
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Pages |
257-263 |
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Abstract |
Interventions in aggressive disputes were investigated in a free-living troop of vervets (Cercopithecus aethiops sabaeus) in Barbados. Interventions on behalf of kin were more frequent than on behalf of non-kin. Both types of interventions were more likely when the intervening animal outranked the opponent; presumably because retaliation probability, and hence cost of intervening, is low against low ranking opponents. The number of interventions given on behalf of both kin and non-kin increased with the number of disputes in which they were involved. In contrast to kin interventions, the number of interventions given on behalf of non-kin was correlated with that received by non-kin, suggesting that reciprocation is a necessary component of non-kin interventions. Non-kin interventions were more likely when the recipient outranked the opponent, presumably because reciprocation probability is high. Pairs of non-kin form structured reciprocal relationships based on the proportion of interventions allocated to each other, and most non-kin interventions flowed through these relationships. Males intervened on behalf of non-kin more frequently than did females. The implications of the results for the evolution of kin and reciprocal altruism were discussed. |
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Notes |
10.1007/Bf00292178 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4927 |
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Author |
Enileeva, N.K. |
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Title |
[Ecological characteristics of horse stomach botflies in Uzbekistan] |
Type |
Journal Article |
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Year |
1987 |
Publication |
Parazitologiia |
Abbreviated Journal |
Parazitologiia |
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Volume |
21 |
Issue |
4 |
Pages |
577-579 |
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Keywords |
Animals; Diptera/*physiology; Ecology; Female; Flight, Animal; Horses/*parasitology; Larva/physiology; Male; Population Dynamics; Uzbekistan |
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Abstract |
The paper describes the flight periods and dynamics of abundance of horse botflies, life span of females and males, effect of environmental factors on the activity of flies and their behaviour, potential fecundity of different species of botflies, duration of embryonal development, preservation of viability of larvae in egg membranes, localization of different stages of botflies in the host, and methods of their control. |
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Russian |
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Original Title |
Ekologicheskie osobennosti zheludochnykh ovodov loshadei v Uzbekistane |
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0031-1847 |
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Notes |
PMID:2958767 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2680 |
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Author |
Sukhomlinov, B.F.; Korobov, V.N.; Gonchar, M.V.; Datsiuk, L.A.; Korzhev, V.A. |
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Title |
[Comparative analysis of the peroxidase activity of myoglobins in mammals] |
Type |
Journal Article |
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Year |
1987 |
Publication |
Zhurnal Evoliutsionnoi Biokhimii i Fiziologii |
Abbreviated Journal |
Zh Evol Biokhim Fiziol |
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Volume |
23 |
Issue |
1 |
Pages |
37-41 |
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Keywords |
Amino Acid Sequence; Animals; Ecology; *Evolution; Kinetics; Mammals/*metabolism; Myoglobin/*metabolism; Peroxidases/*metabolism |
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Abstract |
Studies have been made on the peroxidase activity of metmyoglobins in animals from various ecological groups--the horse Equus caballus, cattle Bos taurus, beaver Castor fiber, otter Lutra lutra, mink Mustela vison and dog Canis familiaris. It was found that the level of this activity in diving animals depends on the duration of their diving, whereas in terrestrial species--on the strength of muscular contraction. |
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Russian |
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Original Title |
Sravnitel'nyi analiz peroksidaznoi aktivnosti mioglobinov u mlekopitaiushchikh |
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0044-4529 |
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Notes |
PMID:3564776 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2681 |
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Author |
DOBRORUKA LJ et al, |
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Title |
An analysis of the population of Grevy's zebra |
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Journal Article |
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Year |
1987 |
Publication |
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Abbreviated Journal |
Int Zoo Yb |
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Volume |
26 |
Issue |
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Pages |
290-293 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1018 |
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Author |
GODFREY D et al, |
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Title |
Zebra stripes and tiger stripes: the special frequency distribution of the pattern compared to that of the background is significant in disply and crysis |
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Journal Article |
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Year |
1987 |
Publication |
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Abbreviated Journal |
Biol J Linnean Soc |
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Volume |
32 |
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Pages |
427-433 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1116 |
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Author |
Penzhorn Bl, L.P. |
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Title |
Comparisons of reproductive parameters of two Cape mountain zebra populations |
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Journal Article |
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Year |
1987 |
Publication |
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Abbreviated Journal |
J Reprod Fert Suppl |
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Volume |
35 |
Issue |
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Pages |
661-663 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1462 |
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Author |
Kacelnik, A. |
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Title |
Information primacy or preference for familiar foraging techniques? A critique of Inglis & Ferguson |
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Journal Article |
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Year |
1987 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
35 |
Issue |
3 |
Pages |
925-926 |
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2121 |
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Author |
Giraldeau, L.-A.; Lefebvre, L. |
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Title |
Scrounging prevents cultural transmission of food-finding behaviour in pigeons |
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Journal Article |
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Year |
1987 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
35 |
Issue |
2 |
Pages |
387-394 |
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Abstract |
Living in groups should promote the cultural transmission of a novel behaviour because opportunities for observing knowledgeable individuals are likely to be more numerous in this condition. However, in this study pigeons who shared the food discoveries of others (scroungers) did not learn the food-finding technique used by the discoverers (producers). Individually-caged pigeons prevented from scrounging easily learned the technique from a conspecific tutor. When caged pigeons obtained food from the tutor's performance, most naïve observers failed to learn. In a flock, scroungers selectively followed producers. In individual cages, scrounging during the tutor's demonstration was equivalent to getting no demonstration at all. This effect of scrounging did not interfere with subsequent acquisition of the food-finding behaviour when scrounging was no longer possible. |
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0003-3472 |
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Call Number |
Equine Behaviour @ team @ |
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5265 |
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