Records |
Author |
Belock, B.; Kaiser, L.J.; Lavagnino, M.; Clayton, H.M. |
Title |
Comparison of pressure distribution under a conventional saddle and a treeless saddle at sitting trot |
Type |
Journal Article |
Year |
2012 |
Publication |
The Veterinary Journal |
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Volume |
193 |
Issue |
1 |
Pages |
87-91 |
Keywords |
Horse; Rider; Equitation; Tack; Electronic pressure mat |
Abstract |
It can be a challenge to find a conventional saddle that is a good fit for both horse and rider. An increasing number of riders are purchasing treeless saddles because they are thought to fit a wider range of equine back shapes, but there is only limited research to support this theory. The objective of this study was to compare the total force and pressure distribution patterns on the horse’s back with conventional and treeless saddles. The experimental hypotheses were that the conventional saddle would distribute the force over a larger area with lower mean and maximal pressures than the treeless saddle. Eight horses were ridden by a single rider at sitting trot with conventional and treeless saddles. An electronic pressure mat measured total force, area of saddle contact, maximal pressure and area with mean pressure >11 kPa for 10 strides with each saddle. Univariate ANOVA (P < 0.05) was used to detect differences between saddles. Compared with the treeless saddle, the conventional saddle distributed the rider’s bodyweight over a larger area, had lower mean and maximal pressures and fewer sensors recording mean pressure >11 kPa. These findings suggested that the saddle tree was effective in distributing the weight of the saddle and rider over a larger area and in avoiding localized areas of force concentration. |
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1090-0233 |
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Equine Behaviour @ team @ |
Serial |
5821 |
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Author |
Sigurjonsdottir, H.; Thorhallsdottir, A.; Hafthorsdottir, H.; Granquist S. |
Title |
The Behaviour of Stallions in a Semiferal Herd in Iceland: Time Budgets, Home Ranges, and Interactions |
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Journal Article |
Year |
2012 |
Publication |
International Journal of Zoology |
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Volume |
2012 |
Issue |
Article ID 162982 |
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A permanent herd of Icelandic horses with four stallions and their harems was studied for a total of 316 hours in a large pasture (215 ha) in May 2007 in Iceland. Interactions between stallions of different harems and other aspects of the horses' behaviour were studied. One stallion and nine horses were introduced into the pasture prior to the study to examine the reactions of the resident stallions to a newcomer. The stallions spent significantly less time grazing than other horses and were more vigilant. Home ranges overlapped, but harems never mixed. The stallions prevented interactions between members of different harems indirectly by herding. Generally, interactions between resident stallions were nonviolent. However, encounters with the introduced stallion were more aggressive and more frequent than between the other stallions. Here, we show that four harems can share the same enclosure peacefully. The social network seems to keep aggression at a low level both within the harems and the herd as a whole. We encourage horse owners to consider the feasibility of keeping their horses in large groups because of low aggression and because such a strategy gives the young horses good opportunities to develop normally, both physically and socially. |
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Equine Behaviour @ team @ |
Serial |
5823 |
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Author |
Casella, S.; Fazio, F.; Giannetto, C.; Giudice, E.; Piccione, G. |
Title |
Influence of transportation on serum concentrations of acute phase proteins in horse |
Type |
Journal Article |
Year |
2012 |
Publication |
Research in Veterinary Science |
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Volume |
93 |
Issue |
2 |
Pages |
914-917 |
Keywords |
Acute phase proteins; Horse; Transportation stress; Welfare; White Blood Cells |
Abstract |
The modifications of Haptoglobin (Hp), Serum Amyloid A (SAA), Fibrinogen (Fbg) and White Blood Cells (WBCs) were evaluated in 15 Saddle Italian horses. Ten horses were transported covering a distance of about 320 km within 4 h with an average speed of 80 km/h (experimental group) and five horses were not subject to transportation (control group). Blood was collected via jugular venipuncture before the transportation (T0), immediately after the transportation (T1), 12 (T12), 24 (T24) and 48 (T48) hours after the transportation in experimental group and at the same time point in control group. For each parameter statistical analysis of different groups and sampling time was performed using a two-way analysis of covariance, with the data before the transportation (T0) as the covariate, by the GLM procedure of SAS. For all parameters the interaction (Group × Time) was tested and it was resulted no significant. The application of statistical analysis showed significant differences between the control group and horses subjected to transportation (P < 0.01), and the influence of sampling time (P < 0.05) on Hp, SAA and WBCs. These modifications appeared to be innovative showing that equine Hp, generally considered as moderate acute phase protein, increases more rapidly than the SAA after transportation-induced stress. |
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0034-5288 |
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Equine Behaviour @ team @ |
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5843 |
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Author |
Spagnoletti, N.; Visalberghi, E.; Verderane, M.P.; Ottoni, E.; Izar, P.; Fragaszy, D. |
Title |
Stone tool use in wild bearded capuchin monkeys, Cebus libidinosus. Is it a strategy to overcome food scarcity? |
Type |
Journal Article |
Year |
2012 |
Publication |
Animal Behaviour |
Abbreviated Journal |
Anim. Behav. |
Volume |
83 |
Issue |
5 |
Pages |
1285-1294 |
Keywords |
bearded capuchin; Cebus libidinosus; fallback food; necessity hypothesis; nut cracking; opportunity hypothesis; tool use |
Abstract |
To determine whether tool use varied in relation to food availability in bearded capuchin monkeys, we recorded anvil and stone hammer use in two sympatric wild groups, one of which was provisioned daily, and assessed climatic variables and availability of fruits, invertebrates and palm nuts. Capuchins used tools to crack open encased fruits, mostly palm nuts, throughout the year. Significant differences between wet and dry seasons were found in rainfall, abundance of invertebrates and palm nuts, but not in fruit abundance. Catulè nuts were more abundant in the dry season. We tested the predictions of the necessity hypothesis (according to which tool use is maintained by sustenance needs during resource scarcity) and of the opportunity hypothesis (according to which tool use is maintained by repeated exposure to appropriate ecological conditions, such as preferred food resources necessitating the use of tools). Our findings support only the opportunity hypothesis. The rate of tool use was not affected by provisioning, and the monthly rate of tool use was not correlated with the availability of fruits and invertebrates. Conversely, all capuchins cracked food items other than palm nuts (e.g. cashew nuts) when available, and adult males cracked nuts more in the dry season when catulè nuts (the most common and exploited nut) are especially abundant. Hence, in our field site capuchins use tools opportunistically. |
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0003-3472 |
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Equine Behaviour @ team @ |
Serial |
5855 |
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Author |
Ayala, I.; Martos, N.F.; Silvan, G.; Gutierrez-Panizo, C.; Clavel, J.G.; Illera, J.C. |
Title |
Cortisol, adrenocorticotropic hormone, serotonin, adrenaline and noradrenaline serum concentrations in relation to disease and stress in the horse |
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Journal Article |
Year |
2012 |
Publication |
Research in Veterinary Science |
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Volume |
93 |
Issue |
1 |
Pages |
103-107 |
Keywords |
Horse; Disease; Cortisol; Acth; Serotonin; Catecholamines; Stress |
Abstract |
No detailed comparative data are available on the hormonal parameters of horses suffering from a number of diseases. The aim of our study was to measure concentrations of cortisol, adrenocorticotropic hormone (ACTH), serotonin, adrenaline and noradrenaline in horses with various diseases and following surgery, to assess the response of the HPA axis and adrenal medulla. Blood samples were obtained from six groups of horses comprising a total of 119 animals as follows: laminitis, acute abdominal syndrome (AAS), castration surgery, acute diseases, chronic diseases and healthy controls. Serum hormonal concentrations were determined for each group for comparison. Statistically significant differences between all groups and controls were found for cortisol, ACTH (except for castration), serotonin and adrenaline concentrations but only in horses with laminitis and AAS for noradrenaline. No statistically significant differences were found between males and females. The largest changes in the pituitary–adrenal axis activity occurred mainly in acute diseases, laminitis and in the AAS group. |
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0034-5288 |
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Equine Behaviour @ team @ |
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5935 |
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Author |
Palme, R.; Touma, C.; Arias,N.; Dominchin, M.F.; Lepschy, M. |
Title |
Steroid extraction: Get the best out of faecal samples |
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Journal Article |
Year |
2012 |
Publication |
Veterinary Medicine Austria |
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Vet. Med. Austria |
Volume |
100 |
Issue |
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Pages |
238-246 |
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Abstract |
Faecal steroid hormone metabolites are becoming increasingly popular as parameters for reproductive functions and stress. Theextraction of the steroids from the faecal matrix represents the initial step before quantification can be performed. The steroid metabolites present in the faecal matrix are of varying polarity and composition, so selection of a proper extraction procedure is essential. There have been some studies to address this complex but often neglected point. Radiolabelled
steroids (e.g. cortisol or progesterone) have frequently been added to faecal samples to estimate the efficiency of the extraction procedures used. However, native, unmetabolized steroids are normally not present in the faeces and therefore the results are artificial and do not accurately reflect the actual recoveries of the substances of interest. In this respect, recovery experiments based on faecal samples from radiometabolism studies are more informative. In these samples, the metabolite content accurately reflects the mixture of metabolites present in the given species. As a result, it is possible to evaluate different extraction methods for use with faecal samples. We present studies on sheep, horses, pigs, hares and dogs that utilized samples containing naturally metabolized, 14C-labelled steroids. |
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Review, faeces, extrac- tion, non-invasive hormone moni- toring, stress, reproduction. |
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Equine Behaviour @ team @ |
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6046 |
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Author |
Heyes, C. |
Title |
What's social about social learning? |
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Journal Article |
Year |
2012 |
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J Comp Psychol |
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120 |
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Equine Behaviour @ team @ Heyes2012 |
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6228 |
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Smaers, J.B.; Dechmann, D.K.N.; Goswami, A.; Soligo, C.; Safi, K. |
Title |
Comparative analyses of evolutionary rates reveal different pathways to encephalization in bats, carnivorans, and primates |
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2012 |
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Proc Natl Acad Sci U S A |
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109 |
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Equine Behaviour @ team @ Smaers2012 |
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6238 |
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Author |
Benson-Amram, S.; Holekamp, K.E. |
Title |
Innovative problem solving by wild spotted hyenas |
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Journal Article |
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2012 |
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Proc R Soc B |
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Proc R Soc B |
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279 |
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4087-4095 |
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Equine Behaviour @ team @ Benson-Amram2012 |
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6266 |
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Author |
Thornton, A.; Samson, J. |
Title |
Innovative problem solving in wild meerkats |
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2012 |
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Anim Behav |
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83 |
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Equine Behaviour @ team @ Thornton2012 |
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6267 |
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