| Records |
| Author |
Knubben, J.M.; Fürst, A.; Gygax, L.; Stauffacher, M. |
| Title |
Bite and kick injuries in horses: Prevalence, risk factors and prevention |
Type |
Journal Article |
| Year |
2008 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
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| Volume |
40 |
Issue |
3 |
Pages |
219-223 |
| Keywords |
horse; kick; bite; injury; risk factors |
| Abstract |
Reasons for performing study: Studies on the prevalence and predisposing factors of bite and kick injuries in horses have not been reported in a population-based data sample. Objectives: To investigate the prevalence of bite and kick injuries in horses and associated risk factors in a representative sample of horses in Switzerland. Methods: A questionnaire on the incidence of disease and injury, which included the frequency of bite and kick injuries and their association with breed, housing, use and feeding regime, was sent to 2559 horse owners randomly selected throughout Switzerland. Results: The data of 2912 horses with 897 disorders diagnosed by a veterinarian were analysed. There were 231 injuries, 50 (21.6%) caused by a bite or kick from another horse; this number corresponded to 5.6% of all diseases and injuries and concerned only 1.7% of all the horses evaluated. Warmblood, Thoroughbred and Arabian horses had a 4.3 times higher risk of bite or kick injuries than horses of other breeds. Eighteen per cent of injuries were associated with a change in housing management and occurred regardless of whether horses were kept in groups permanently or sporadically. Conclusions and potential relevance: A stable group hierarchy and a housing system that provides adequate space and is adapted to horse-specific behaviour are important factors in prevention and kick and bite injuries. |
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Blackwell Publishing Ltd |
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2042-3306 |
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Equine Behaviour @ team @ |
Serial |
5760 |
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| Author |
Bartoš, L.; Bartošová, J.; Starostová, L. |
| Title |
Position of the head is not associated with changes in horse vision |
Type |
Journal Article |
| Year |
2008 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
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| Volume |
40 |
Issue |
6 |
Pages |
599-601 |
| Keywords |
horse; horse vision; head position; pupil rotation |
| Abstract |
It has become accepted that the horse cannot see directly in front when the nose is lowered and must therefore rely on the rider. We tested the hypothesis that this conclusion would be correct only if the horse did not adjust the eyeball horizontal axis to changes of the head position. The results of the present study suggest that it is unlikely that horses have limited vision in relation to their head position when driven by the rider, and that the horse maintains the optimal horizontal eyeball position regardless of head position relative to the ground. |
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Blackwell Publishing Ltd |
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| ISSN |
2042-3306 |
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Equine Behaviour @ team @ |
Serial |
5679 |
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| Author |
Romero, T.; Aureli, F. |
| Title |
Reciprocity of support in coatis (Nasua nasua) |
Type |
Journal Article |
| Year |
2008 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
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| Volume |
122 |
Issue |
1 |
Pages |
19-25 |
| Keywords |
*Animal Aggressive Behavior; *Animal Social Behavior; *Mammals; Reciprocity |
| Abstract |
Primate sociality has received much attention and its complexity has been viewed as a driving force for the evolution of cognitive abilities. Improved analytic techniques have allowed primate researchers to reveal intricate social networks based on the exchange of cooperative acts and services. Although nonprimates are known to show similar behavior (e.g., cooperative hunting, food sharing, coalitions) there seems a consensus that social life is less complex than in primates. Here the authors present the first group-level analysis of reciprocity of social interactions in a social carnivore, the ring-tailed coati (<xh:i xmlns:search=“http://marklogic.com/appservices/search” xmlns=“http://apa.org/pimain” xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance” xmlns:xh=“http://www.w3.org/1999/xhtml”>Nasua nasua</xh:i>). The authors found that support in aggressive conflicts is a common feature in coatis and that this behavior is reciprocally exchanged in a manner seemingly as complex as in primates. Given that reciprocity correlations persisted after controlling for the effect of spatial association and subunit membership, some level of scorekeeping may be involved. Further studies will be needed to confirm our findings and understand the mechanisms underlying such reciprocity, but our results contribute to the body of work that has begun to challenge primate supremacy in social complexity and cognition. (PsycINFO Database Record (c) 2012 APA, all rights reserved) |
| Address |
Romero, Teresa: Living Links, Yerkes National Primate Research Center, Emory University, 954 N. Gatewood Road, Atlanta, GA, US, 30329, mromer2@emory.edu |
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American Psychological Association |
Place of Publication |
Us |
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1939-2087(Electronic);0735-7036(Print) |
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no |
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Equine Behaviour @ team @ 2008-01944-003 |
Serial |
5812 |
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| Author |
Dubois, C.; Manfredi, E.; Ricard, A. |
| Title |
Optimization of breeding schemes for sport horses |
Type |
Journal Article |
| Year |
2008 |
Publication |
Livestock Science |
Abbreviated Journal |
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| Volume |
118 |
Issue |
1-2 |
Pages |
99-112 |
| Keywords |
Breeding scheme; Horse; Jumping; Optimization; Genetic trend, Multistage selection |
| Abstract |
A selection scheme for jumping sport horses is modelled with four stages of selection for males and one stage for females. The selection objective included three traits: conformation and gaits (CG, weighted 20%), competition jumping (CJ, weighted 60%) and a third trait (TT, weighted 20%) such as sperm quality or orthopaedic status. The first selection stage is based on knowledge of the pedigree with the aim of selecting horses suitable for CG test (at 3Â years old) and CJ test (at 5Â years old). The second stage includes the horse's own performance with respect to CG and CJ with the aim of selecting horses suitable for the TT test. The third stage is the selection of a limited number of males who are allowed to reproduce. The fourth stage (at 12Â years old) takes into account the results of the horse's progeny. Females are selected in one step, whatever the number of performances measured at 5Â years old. The annual genetic response was 9.4% genetic standard deviation of the objective, 2.6% for CG, 9.0% for CJ and 1.5% for TT. Results showed that selection by progeny testing did not contribute much to genetic response (12% of progeny issued from proven sires), the female pathway represented 26% of genetic response, TT was difficult to improve when the genetic correlation was unfavourable (-Â 0.6% genetic standard deviation for -Â 0.20 genetic correlation), and should consequently be directed towards the use of molecular markers. When compared with a selection scheme involving a station test, genetic response was the same if the breeding values used for selection before entering the station test took into account the results of the relatives for CJ and CG. This revealed the importance of an extensive performance test (like for competition performance) when designing breeding schemes for sport horses. |
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Edition |
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| ISSN |
1871-1413 |
ISBN |
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Approved |
no |
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Equine Behaviour @ team @ |
Serial |
4759 |
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| Author |
Kavar, T.; Dovc, P. |
| Title |
Domestication of the horse: Genetic relationships between domestic and wild horses |
Type |
Journal Article |
| Year |
2008 |
Publication |
Livestock Science |
Abbreviated Journal |
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| Volume |
116 |
Issue |
1-3 |
Pages |
1-14 |
| Keywords |
Equus caballus; Domestication; Mitochondrial DNA (mtDNA); Y chromosome markers |
| Abstract |
To date, a large amount of equine genetic data has been obtained regarding (i) extant domestic horses of various breeds from all over the world, (ii) ancient domestic horses, (iii) the extant Przewalski's wild horse, and (iv) the late Pleistocene wild horse from Eurasia and North America. Here, a review of mtDNA and Y chromosome marker analyses is presented in the context of horse domestication. High matrilineal (mtDNA) diversity, which can be found in both extant and ancient (domestic and wild) horses, has suggested that a high number of wild (and tamed) mares were domesticated. Alternatively, Y chromosome marker analysis revealed a single haplotype in all domestic horses analyzed; interestingly even a small population of extant Przewalski's wild horses showed two different Y chromosome haplotypes. It seems that an extreme male population bottleneck occurred due to domestication, while reduction in the female population was only moderate, leaving about 100 distinct haplotypes. For this reason, we speculate that domestication might have started when the appropriate stallion was found or was obtained by selection. Perhaps it had some unusual but special characteristics which could have accelerated the process of domestication. We doubt that only a single Y chromosome haplotype will be found in present-day domestic horses if there are no important differences between the founder stallion/s and the other stallions that were not included in the domestication. In the Eneolithic, tamed and wild mares have probably been spread all over Eurasia, although the number of animals was most likely very low and the populations were limited to a restricted area (e.g., taming centers). Only two subspecies of wild horses (Tarpan and Przewalski's wild horse) have survived up to recently. During the further process of domestication, mares (tamed or wild) were preferentially crossed to stallions having more desirable characteristics. We assume that mares from different regions varied in their morphology due to adaptation to their local environmental conditions. These data might explain rapid expansion of horse populations, as well as their rapid differentiation into various phenotypes during the early phase of domestication. |
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1871-1413 |
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no |
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Equine Behaviour @ team @ |
Serial |
4771 |
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| Author |
Thiruvenkadan, A.K.; Kandasamy, N.; Panneerselvam, S. |
| Title |
Coat colour inheritance in horses |
Type |
Journal Article |
| Year |
2008 |
Publication |
Livestock Science |
Abbreviated Journal |
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| Volume |
117 |
Issue |
2-3 |
Pages |
109-129 |
| Keywords |
Horse; Coat colour; Melanogenesis; Genetic control; Molecular genetics |
| Abstract |
The colours of the horses have long been a subject of interest to owners and breeders of horses as well as to scientists. Though, the colour of horses has little to do with its performance, it is a primary means of identification and also the first indicator of questionable parentage. Probably the ancestral colour of the horse was a black-based pattern that provided camouflage protection against predators. Horse colours are mostly controlled by genes at 12 different loci. The three basic colours of horses are black, bay and chestnut. The genetic control of the basic colours of horses resides at two genetic loci, namely Extension (E) and Agouti (A) loci. Among the basic colours bay is dominant to black and both are epistatic to chestnut. Dilution of basic colours of horses as a result of four colour dilution genes such as cream dilution, dun, silver dapple and champagne resulted in extensive array of possible colours of horses. The most widespread and familiar of the horse colour dilution gene is the one that produces the golden body colour and are called as palomino or buckskin based on the colour of the points. The grey coat colour is due to the presence of dominant gene (G) at the grey locus. Grey is epistatic to all coat colour genes except white and a grey horse must have at least one grey parent. Roan is due to a dominant gene (Rn) at roan locus and this combines with any base colour to produce the various shades of roan pattern. White coat is due to a single dominant gene (W) and it is epistatic to the genes controlling all other colours. White marking in the face and legs are due to genetic and non-genetic factors. Several genes are involved in producing white markings. During recent years, comparative genomics and whole genome scanning have been used to develop DNA tests for different variety of horse colours. Molecular genetic studies on coat colour in horses helped in identification of the genes and mutation responsible for coat colour variants. In future, this will be applied to breeding programmes to reduce the incidence of diseases and to increase the efficiency of race horse population. |
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1871-1413 |
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no |
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Equine Behaviour @ team @ |
Serial |
4776 |
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Berge, J.; Cottier, F.; Last, K.S.; Varpe, O.; Leu, E.; Soreide, J.; Eiane, K.; Falk-Petersen, S.; Willis, K.; Nygard, H.; Vogedes, D.; Griffiths, C.; Johnsen, G.; Lorentzen, D.; Brierley, A.S. |
| Title |
Diel vertical migration of Arctic zooplankton during the polar night |
Type |
Journal Article |
| Year |
2008 |
Publication |
Biology Letters |
Abbreviated Journal |
Biol Lett |
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Issue |
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Pages |
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| Abstract |
High-latitude environments show extreme seasonal variation in physical and biological variables. The classic paradigm of Arctic marine ecosystems holds that most biological processes slow down or cease during the polar night. One key process that is generally assumed to cease during winter is diel vertical migration (DVM) of zooplankton. DVM constitutes the largest synchronized movement of biomass on the planet, and is of paramount importance for marine ecosystem function and carbon cycling. Here we present acoustic data that demonstrate a synchronized DVM behaviour of zooplankton that continues throughout the Arctic winter, in both open and ice-covered waters. We argue that even during the polar night, DVM is regulated by diel variations in solar and lunar illumination, which are at intensities far below the threshold of human perception. We also demonstrate that winter DVM is stronger in open waters compared with ice-covered waters. This suggests that the biologically mediated vertical flux of carbon will increase if there is a continued retreat of the Arctic winter sea ice cover. |
| Address |
University Centre in Svalbard, Pb 156, 9171 Longyearbyen, Norway The Scottish Association for Marine Science, Dunstaffnage Marine Laboratories, Oban, Argyll PA37 1QA, UK |
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English |
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1744-9561 |
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| Notes |
PMID:18948249 |
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no |
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Equine Behaviour @ team @ |
Serial |
4629 |
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| Author |
Scheumann, M.; Zimmermann, E. |
| Title |
Sex-specific asymmetries in communication sound perception are not related to hand preference in an early primate |
Type |
Journal Article |
| Year |
2008 |
Publication |
BMC Biology |
Abbreviated Journal |
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6 |
Issue |
1 |
Pages |
3 |
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BACKGROUND:Left hemispheric dominance of language processing and handedness, previously thought to be unique to humans, is currently under debate. To gain an insight into the origin of lateralization in primates, we have studied gray mouse lemurs, suggested to represent the most ancestral primate condition. We explored potential functional asymmetries on the behavioral level by applying a combined handedness and auditory perception task. For testing handedness, we used a forced food-grasping task. For testing auditory perception, we adapted the head turn paradigm, originally established for exploring hemispheric specializations in conspecific sound processing in Old World monkeys, and exposed 38 subjects to control sounds and conspecific communication sounds of positive and negative emotional valence.RESULTS:The tested mouse lemur population did not show an asymmetry in hand preference or in orientation towards conspecific communication sounds. However, males, but not females, exhibited a significant right ear-left hemisphere bias when exposed to conspecific communication sounds of negative emotional valence. Orientation asymmetries were not related to hand preference.CONCLUSION:Our results provide the first evidence for sex-specific asymmetries for conspecific communication sound perception in non-human primates. Furthermore, they suggest that hemispheric dominance for communication sound processing evolved before handedness and independently from each other. |
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1741-7007 |
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no |
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Equine Behaviour @ team @ |
Serial |
5369 |
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| Author |
Weishaupt, M.A. |
| Title |
Adaptation strategies of horses with lameness |
Type |
Journal Article |
| Year |
2008 |
Publication |
The Veterinary Clinics of North America. Equine Practice |
Abbreviated Journal |
Vet Clin North Am Equine Pract |
| Volume |
24 |
Issue |
1 |
Pages |
79-100 |
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| Abstract |
The skill to diagnose lameness in horses is paramount for every equine practitioner. Early recognition of locomotor deficiencies plays a central role in sports medicine management, preventing deterioration of the disease or catastrophic injuries. Horses use characteristic compensatory movements of specific body parts to decrease loading of the affected limb. This article describes the underlying changes in intra- and interlimb coordination and the resulting load redistribution between the limbs. This enables the practitioner to better understand the changes in movement associated with lameness. |
| Address |
Equine Department, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, CH-8057 Zurich, Switzerland. mweishaupt@vetclinics.uzh.ch |
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English |
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1558-4224 |
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| Notes |
PMID:18314037 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
4372 |
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| Author |
O'Grady, S.E. |
| Title |
Basic farriery for the performance horse |
Type |
Journal Article |
| Year |
2008 |
Publication |
The Veterinary Clinics of North America. Equine Practice |
Abbreviated Journal |
Vet Clin North Am Equine Pract |
| Volume |
24 |
Issue |
1 |
Pages |
203-218 |
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| Abstract |
Proper farriery promotes a healthy functional foot and biomechanical efficiency and prevents lameness. Because the equine veterinarian is responsible for the soundness of the horse, a working knowledge of farriery becomes essential. A thorough knowledge of traditional horseshoeing enables the veterinarian to interact with the farrier at the farrier's level; this ultimately enhances and promotes quality hoof care. This article focuses on fundamental farriery and recognizing subtle changes in hoof conformation that can be used to preserve the integrity of the hoof capsule, along with the structures enclosed within, and thus prevent lameness in the performance horse. |
| Address |
Northern Virginia Equine, 8170 Patrickswell Lane, Marshall, VA 20115, USA. sogrady@look.net |
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English |
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1558-4224 |
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| Notes |
PMID:18314044 |
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no |
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Equine Behaviour @ team @ |
Serial |
4373 |
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