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Posta, J.; Mezei, A.; Mihók, S. |
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Title |
Genetic evaluation of competition years, as a kind of measurement of durability in Hungarian show-jumping horses |
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Conference Article |
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Year |
2012 |
Publication |
Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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in press |
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Sport horse, show-jumping, genetic evaluation, durability |
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The aim of the study was to investigate the possibilities to use “number of years in competition” as a measure of durability in the genetic evaluation of Hungarian show-jumping horses. Competition results recorder between 1996 and 2009 in show-jumping competitions were used to estimate genetic parameters for number of years in competition. The results were collected by the Show-jumping Group of the Hungarian Horse Breeder’s Society. For estimation of genetic parameters for number of years in competition different linear mixed models were tested. In the first model, sex and birth year were taken into account as fixed effects. In the second model, an adjustment was made for age at first result in competition. The model fit was compared based on their determination coefficient. Variance components were estimated with VCE-6 software package. The determination coefficients of the models were 0.09 and 0.20, while the estimated heritability for number of years in competition was 0.27 and 0.23, respectively. |
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Posta, J. |
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Xenophon Publishing |
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Wald |
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Krueger, K. |
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978-3-9808134-26 |
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Equine Behaviour @ team @ |
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5524 |
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Author |
Ramnath, D.; Ralston, S.; Anderson, H. |
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Title |
Trainability and reactivity of Mustang Horses (Equus Equus) fed Forage-Based Total Mixed (TMR) rations with or without added grain |
Type |
Conference Article |
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Year |
2012 |
Publication |
Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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The relationship between ration and behavior in horses has not been extensively studied, though it is widely thought that the type of feed fed can influence how a horse behaves. For example rations high in sugar and starch have been documented to increase young horses' reactivity to novel stimuli. Since the temperament of a horse has been linked to the ease with which it can be trained, documenting if a horse’s behavior can be altered by its ration would be of interest to the equine industry. We hypothesized that increasing the starch intake of young mustangs by addition of corn or oats to a forage-based total mixed ration (TMR) would alter their reactivity to stimuli and responsiveness to learned commands. To test this hypothesis 8 recently tamed mustangs (4 geldings and 4 fillies, one and two years of age) were used. The mustangs were divided into two groups based on age, sex and temperament. In a series of three experiments they were fed TMR cubes with or without 10% added corn free choice (Exp. 1, Fall, 2010), or a basal ration of TMR cubes free choice with morning meals of 1kg TMR cubes versus an equicaloric amount of corn (exp. 2, Spring, 2011) or oats (Exp. 3, Spring 2011) in a simple crossover design with 2 to 2.5 week adaptation periods for each trial. The horses’ trainability and reactivity to stimuli were evaluated before the treatments were initiated and after each adaptation period 60 to 90 minutes after the morning meals were fed. In the tests the horses were asked to perform a standardized series of commands (ie: walk on, turn, stop and stand still, back up), and were then confronted with a novel stimulus, which varied with each trial. A single handler (SLR) led each horse through the tests, which was then repeated on the next day using a student handler instead. Treatments were then switched and the horses were re-tested, so that each horse was tested on each feed type in all 3 experiments. Each horse’s performance was scored by 2 judges, who were both professional trainers who had been assigned 4 horses to train throughout the study. These judges scored the horses' performances as the tests were done. Each test was videotaped for further evaluation by a third judge (D. Ramnath) who was not familiar with the horses and who was blind to the ration being fed. The performances were scored using a numerical scale of 0-5, with 0=total noncompliance and 5=perfect execution of the tasks asked of the horse. There were no differences (p>0.1) in responses to commands or reactivity to stimuli between rations in any of the trials or with respect to which trainer had trained the horse. There were, however, differences (P<0.05) among horses, handlers and judges with respect to the scores. It appears that addition of a moderate amount of starchy feed to a horse's ration has less influence on the horse's trainability and reactivity than the animal's natural temperament and handler ability. KW - |
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Ralston, S. |
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Xenophon Publishing |
Place of Publication |
Wald |
Editor |
Krueger, K. |
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978-3-9808134-26 |
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Equine Behaviour @ team @ |
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5533 |
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Author |
Reuber, W.; Reuber, K. |
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Title |
Kennen Pferde ihren Namen? |
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Conference Article |
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Year |
2012 |
Publication |
Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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in press |
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Abstract Missing KW - |
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Corporate Author |
Reuber, W. |
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Publisher |
Xenophon Publishing |
Place of Publication |
Wald |
Editor |
Krueger, K. |
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Deutsch |
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978-3-9808134-26 |
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Public Day |
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Equine Behaviour @ team @ |
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5571 |
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Author |
Rubenstein, D. |
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Title |
Wild Equid Movements: Impacts of Habitat Quality, Predation Pressure and Leadership |
Type |
Conference Article |
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Year |
2012 |
Publication |
Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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in press |
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Animals spend much of their lives on the move searching for food, shelter and mates. As long-legged, large bodied species, equids are well suited for traveling long distances. Understanding where free-ranging equids go, why they choose particular locations, some near and some far, and what impact such movements have on patterns of sociality, demography and human livelihoods are only now coming into focus. This talk will explore how bottom-up factors, such as the abundance and distribution of key resources, and top-down factors, such as the type and location of predators, interact to shape overall movement patterns of equids, how leadership roles develop and what outcomes such movements are likely to have on human activities. |
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Rubenstein, D. |
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Xenophon Publishing |
Place of Publication |
Wald |
Editor |
Krueger, K. |
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978-3-9808134-26 |
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Equine Behaviour @ team @ |
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5556 |
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Author |
Russell, M.A.; Aldridge, B.E. |
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Title |
Solving Current Domestic Horse Nutrition Challenges |
Type |
Conference Article |
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Year |
2012 |
Publication |
Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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in press |
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horse nutrition, clinical diseases, digestion, feeding, management |
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Solving horse nutrition challenges require contributions from Psychology, Biology, Agriculture, and Veterinary Medicine because these are biological challenges of an anthropological nature. The domesticated horse has shifted from an animal of war, transportation, and farmwork, to a companion enjoyed for sport, leisure and recreation. The first realization and responsibility must lie in the fact that it is the owners and managers which are the source of many of the horses’ challenges. Nutritional challenges include: defining requirements and absorption of nutrients, improving feed efficiencies for performance, improving feeding management and eating behaviors, and preventing or treating clinical problems. These challenges can be addressed through science, horse management, and education. Many of today’s challenges in horse nutrition can be related to the equine genome and genetics. Those that can be addressed with nutritional consequences include Polysaccharide Storage Myopathy, Equine Metabolic Syndrome, Recurrent Exertional Rhabdomyolysis, Glycogen Branching Enzyme Deficiency, Hyperkalemic Periodic Paralysis, and Development Orthopedic Disorders. It is the scientific understanding of cellular processes in relation to nutrients which address the symptoms associated with these diseases. Consequently, feeding management can be changed to actually treat the disease. The most recent advances in equine nutrition implement the use of molecular and cellular based techniques to understand how nutrients are needed during times of stress, feed withdrawal and to maintain gut health. For example, the absorptive capacity and transporter gene expression and localization, are now being quantified. We are also now assessing the impact of the loss of reproductive endocrines on calcium and phosphorus homeostasis in the horse. Additionally, bioluminescent pathogenic bacteria have been utilized to view attachment rates in the gastrointestinal tract of the horse. These are merely examples of the approaches of science to these nutritional challenges. Science is of little use unless it is incorporated into improved management of horses. Every type of horse requires different management and good husbandry. In our country, 70+% of the horses are kept in small herds, on limited acreage, and used for recreation and sport. Since we have taken the horse out of its natural environment and subjected it to these roles, we now seek to determine ways to feed the horse in our environments; i.e. obesity, inconsistent exercise, confinement, surgery, competition, diseases. Private horse feed agribusinesses have aggressively positioned excellent products with claims to improve health, reproduction, performance, and even horse happiness. Owners and managers seek unbiased science upon which they ultimately make their own decisions. General challenge categories seem to be feeding geriatric horses, active performance horses, and idle horses with secondary metabolic problems. Thus, feeding recommendations include the determination of specific horse nutrient requirements, maximization of available forages, providing other nutrients, and exercise to manage horses more as horses. Private and public companies and Extension systems exist to provide online and other sources of information. As more and more people own horses as a hobby and for recreation, they share responsibility to inform themselves on how to best feed and care for their horses. |
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Corporate Author |
Russell, M.A. |
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Xenophon Publishing |
Place of Publication |
Wald |
Editor |
Krueger, K. |
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978-3-9808134-26 |
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Equine Behaviour @ team @ |
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5523 |
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Author |
Shultz, S. |
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Title |
Are equid brains social? Exploring the evolution of equid social structure and social intelligence |
Type |
Conference Article |
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Year |
2012 |
Publication |
Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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in press |
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The living equids display a variety of different forms of social organisation; plains (Equus quagga) and mountain zebra (Equus zebra) associate in small, closed harems, whereas the asses and Grevy’s zebra (Equus grevyi) are found in looser, more ephemeral associations. Feral domestic horses appear to be somewhat intermediate: although stallions generally maintain harems, there is some movement of individuals between groups. This talk will use several statistical approached to explore evolutionary explanations for these differences. Firstly, we will explore the relationship between brain architecture and social organisation both among the equids and across all Perissodactyls. Equids have larger relative neocortices than other Perissodactyls; within the equids, species typically found in more stable groups have larger neocortices than equids in more unstable ephemeral groups. The strong relationship between group stability and brain size and architecture mirrors that found in other mammals, including primates. Thus, living in stable social groups consistently appears to impose cognitive demands across species. In order to understand the historical trajectory resulting in the relatively large, social brains found in some species, we then reconstruct the evolutionary pathway of social living in the equids. Finally, we discuss how we can use network theory to measure social structure and how these differences may impose different cognitive demands on individuals. |
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social brain hypothesis, Bayesian modelling, social networks, brain size, social evolution |
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Corporate Author |
Shultz, S. |
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Publisher |
Xenophon Publishing |
Place of Publication |
Wald |
Editor |
Krueger, K. |
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978-3-9808134-26 |
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Equine Behaviour @ team @ |
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5557 |
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Author |
Sigurjonsdottir, H. |
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Title |
How does group stability and composition affect interactions in horse groups? |
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Conference Article |
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Year |
2012 |
Publication |
Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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in press |
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Results from studies on the social behaviour of the Icelandic horse kept in different types of groups will be presented. Most groups were studied for more than 75 hours. The groups vary in composition and in stability. Some groups include stallions (6 groups) while others breeding mares and foals (1), geldings, mares, sub-adults and foals (3), geldings, sub-adults and mares (2), geldings and mares (4), one-sex 1year olds (3) and sub-adults (1). In some of the groups the residency of individual horses was similar (stable groups) while in others the composition changed frequently or unfamiliar horses were all put together at the same time. The results show that both negative and positive interactions are more frequent in unstable groups. Also, interesting differences emerged when different group types were compared. The results are important for management and will be discussed in that context. KW - |
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Corporate Author |
Sigurjonsdottir, H. |
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Publisher |
Xenophon Publishing |
Place of Publication |
Wald |
Editor |
Krueger, K. |
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978-3-9808134-26 |
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Equine Behaviour @ team @ |
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5535 |
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Author |
Spasskaya, N.N. |
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Title |
Results of investigations of an island population of the feral horse (Rostov Region, Russia) |
Type |
Conference Article |
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Year |
2012 |
Publication |
Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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in press |
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Keywords |
feral horse, island population, social population structure, demography |
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A feral horse population inhabiting the Vodnyi Isl, Manych-Ghudilo Lake, on the territory of Rostov Region, S Russia, has been established in 1950s according to questionnaire data (Paklina, Klimov, 1990). It is a sole permanent grouping of feral horse known to exist in European Russia (Spasskaya, Spasskyi, 2007; Spasskaya, 2008). Range of this group is part of Federal Reserve “Rostovsky” established in 1995, and its monitoring has being been conducted since 2006. The principal aim of monitoring includes gathering data on demographic, spatial, and ethological structure of the island horse population, along with investigation of its phenotypic and ethological patterns. Analysis of previously published (Paklina, Klimov, 1990) and recently obtained data on the color patterns of the island horse indicate that they have become isolated supposedly about 18–20 years ago. Some trends in variation of several phenotypic traits indicate slight rising of inbreeding level in this population, including decrease in the horse withers height, changes in body proportions, increase of heterogeneity in body color patterns (size and number of head and leg spots), and increase of frequency of dental malformations, especially of false polydonty of P1 (Spasskaya et al., 2010). Principal demographic parameters of this population are similar in general to those known for other feral horse studied by now. However, several peculiar features of this population were revealed: its age structure appeared to be of steadily fading type judging by high proportion of mature individuals (64–72 %); high mortality rate of individuals of the first year of life (16–25 %); predominance of males among newborns with increase of population size. Ethological structure of the population included standard harem bands and bachelor groups, with few solitary animals (usually old or sick stallion). The most of individuals (58.2–84.3 %) were the part of harem bands, which appeared to be the most stable groupings. The harems were small in their numbers with predominatingly 3–8 individuals. The bachelor groups were inconstant in composition, their portion in population being not high (7.7–15.4 % of the total number). A lot of “mixed” groupings of various composition were recorded in the population during its high number phase: harem bands with several mature stallions; associations consisting of several harem bands; youth groupings consisting of approximately coeval stallions and mares. These “mixed” groupings appeared to be rather stable, with their total number reaching up to 25.8 % of the population. They however used to disappear with population number decrease. The Rostov population is characterized by absence of conspicuous home range of social groupings (Spasskaya, Shcherbakova, 2007; Spasskaya, 2009), so the latter form a united herd with minimal intergroup distances. This phenomenon is probably not related to population density or to the island size, but is rather caused by some other factors to be revealed. |
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Corporate Author |
Spasskaya, N.N. |
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Publisher |
Xenophon Publishing |
Place of Publication |
Wald |
Editor |
Krueger, K. |
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978-3-9808134-26 |
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Equine Behaviour @ team @ |
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5526 |
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Author |
Stanley, C.; Shultz, S. |
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Title |
Mummy’s Boys: Sex Differential Maternal Offspring Relationships in Semi-feral Horses |
Type |
Conference Article |
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Year |
2012 |
Publication |
Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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in press |
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dispersal, Equus ferus caballus, social, maternal investment |
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In polygynous species with high reproductive skew in males, mothers often show differential investment between sons and daughters; however consistent sex differential investment has not been found by previous studies in horses. We investigated sex differences in mother-offspring relationships in nutritionally independent sub-adult semi-feral Carneddau Welsh mountain ponies Equus ferus caballus. Mothers and their sub-adult sons had consistently closer relationships than mothers and daughters. Stronger affiliative bonds between mothers and sons were quantified by their maintenance of closer proximity, higher rates of affiliative interactions and more frequent suckling bouts. These measures of affiliation were temporally associated with higher aggression levels directed towards sub-adults by other band members, particularly stallions. We suggest that aggression may serve as the proximate mechanism driving male dispersal in feral horses and that the stronger mother-son bond signals an attempt to delay their dispersal, highlighting conflict within the band concerning dispersal timing. Since males become increasingly central within the band over time, with mature stallions requiring excellent social skills in order to both acquire and keep a band of mares, we propose that delaying colts' dispersal allows for further development of these skills in a relatively safe environment. This additional investment is expected to maximise their reproductive success. This study illustrates how social network theory can be used to quantify individuals' social experiences, contributing to a greater understanding of the evolution of group living. It also gives us further insight into the mechanisms underlying dispersal in wild and semi-wild horse populations and how conflict often arises when individual needs differ. |
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Corporate Author |
Stanley, C. |
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Publisher |
Xenophon Publishing |
Place of Publication |
Wald |
Editor |
Krueger, K. |
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978-3-9808134-26 |
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Equine Behaviour @ team @ |
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5530 |
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Author |
Stucke, D.; Lebelt, D. |
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Title |
“Animal Welfare Indicators (AWIN) – Erforschung von Schmerzindikatoren am Pferd” |
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Conference Article |
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Year |
2012 |
Publication |
Proceedings of the 2. International Equine Science Meeting |
Abbreviated Journal |
Proc. 2. Int. Equine. Sci. Mtg |
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in press |
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Das EU-Projekt AWIN (Animal Welfare Indicators) hat zum Ziel, ein weltweites Netzwerk zum Thema Tierschutz und Wohlbefinden von Tieren zu erstellen, durch welches Forschungsergebnisse und neue Erkenntnisse ausgetauscht werden können. Diese Informationen sollen auch dem Gesetzgeber zur Verfügung gestellt werden, um neue Gesetze auf wissenschaftlichen Grundlagen beschließen zu können. Des Weiteren soll diese Plattform zu Trainingszwecken genutzt werden, damit Personen, die im Bereich Tierschutz arbeiten, sich fortbilden können.
In vier Arbeitsgruppen wird am Tier zum Thema Wohlbefinden und Schmerz geforscht. In der ersten Arbeitsgruppe werden Beurteilungsprotokolle für Ziegen, Schafe, Pferde, Esel und Puten erarbeitet, um Wohlbefinden und Schmerz objektiv bestimmen zu können. Dabei geht es sowohl um die Erfassung individueller Parameter, als auch um haltungsbedingte Parameter wie Tierdichte, Gruppengröße oder Mensch-Tier-Interaktion. Das Ziel dieser Protokolle ist die einfache Anwendbarkeit auf große Tierbestände.
Die zweite Arbeitsgruppe erforscht die Beziehung zwischen Wohlbefinden und Krankheit bzw. Schmerz. Der Einfluss von akuten oder chronischen Schmerzen kann das Wohlbefinden erheblich beeinträchtigen. Anhand des Krankheitsbildes der akuten und chronischen Hufrehe sowie durch den chirurgischen Eingriff einer Kastration an gesunden Pferden sollen Schmerzindikatoren am Pferd erforscht werden. Die akute Hufrehe dient als Modell für sehr starke Schmerzen. Die Schmerz-assoziierten physiologischen Parameter Herzfrequenzvariabilität und Zytokinreaktion im Blut werden bestimmt. Mit einem Schmerzbeurteilungsbogen werden außerdem ethologische Parameter wie z. B. Körperhaltung, Kopfbewegungen, Lahmheitsgrad, abnormale Gewichtsverlagerungen, Mensch-Pferd-Interaktionsverhalten und weitere physiologischen Parameter wie Atemfrequenz, Herzfrequenz, Darmgeräusch und Körpertemperatur erhoben. Durch das Krankheitsbild der chronischen Hufrehe sollen die ermittelten Schmerz-assoziierten Parameter auf ihre Aussagefähigkeit auch für weniger starke Schmerzen überprüft werden. In der Kastrationsstudie werden Basiswerte ohne Schmerzen vor dem chirurgischen Eingriff erhoben und mit den Werten nach der Kastration verglichen. Neben den oben genannten Parametern werden zusätzlich Cortisolmetaboliten im Kot bestimmt und es werden Videoaufzeichnungen von der Mimik des Pferdes gemacht und ausgewertet. Außerdem soll der Einsatz von Schmerzmitteln vor und nach der Kastration und deren Einfluss auf das Befinden des Pferdes nach der Operation erforscht werden. Das Forschungsziel der zweiten Arbeitsgruppe ist die Bestimmung von geeigneten Messparametern, durch die Schmerz objektiv beurteilt werden kann.
Die dritte Arbeitsgruppe beschäftigt sich mit dem Einfluss von pränatal erlebtem Stress auf die Individualentwicklung des Fohlens. Veränderungen in der Herdenstruktur, soziale Isolation oder abruptes Absetzen des letzten Fohlens während sensibler Trächtigkeitsphasen beeinflussen die tragende Stute und den Foetus. Nach der Geburt wird das Verhalten der Mutterstute und die Entwicklung des neugeborenen Fohlens beobachtet.
In der vierten Arbeitsgruppe schließlich wird das wissenschaftliche Netzwerk zusammengesetzt. Neben wissenschaftlichen Forschungsergebnissen und Publikationen werden auch Lernmaterialien („learning objects“) erarbeitet und zur Verfügung gestellt. „Learning objects“ sind digitale Lernmaterialien, in denen spielerisch Stück für Stück der Lerninhalt interaktiv erarbeitet werden kann. |
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Stucke, D. |
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Xenophon Publishing |
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Wald |
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Krueger, K. |
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Deutsch |
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978-3-9808134-26 |
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Equine Behaviour @ team @ |
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5564 |
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