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Houpt, K.A. |
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Maternal behavior in horses |
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2008 |
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IESM 2008 |
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Mares quickly form a bond with their foals, probably within the first hour. They lick the foal usually beginning at the tail end, then the head and later the body of the foal. Licking behavior disappears within the first hours in most mares. Once the bond is formed the mare will let no other foal nurse and stays within a meter of the foal most of the time during the first week. The foal follows her when awake, but when he sleeps she stands over him. As the foal matures the distance the mare maintains from the foals get longer and she may graze as he sleeps. The bond of the mother to the foal gradually weakens as revealed by her response to separation from the foal. Weaning usually takes place shortly before the birth of the next foal. Some mares will attempt to steal foals and this can lead to injury of either the mares or the foal. Because of the strong and exclusive bond of most mares to their foal, foal rejection is especially abnormal. It occurs in some breeds more frequently than others, indicating a heritable component. Arabian mares reject 5% of their foals and other breeds reject less than 2%. There are three types of foal rejection- simple fear of the foal that can be quickly solved by holding the mare so the foal can suckle. The mare learns that nursing is pleasurable. This process usually takes only a few hours of holding the mare because foals suckle so frequently- about four times an hours. The second form of foal rejection is avoidance of tactile stimulation of the inguinal fold. When the foal attempts to suckle he usually strikes that skin fold and causes the mare to cow kick and move away. Desensitization to stimulation of the inguinal fold can solve this problem in a few hours. Treatment is more complex and longer for mares that are aggressive to the foal even when it does not touch them. This type of foal rejection can be treated with drugs that inhibit dopamine such as acepromazine-not the alpha adrenergic agent xylazine. Dopamine inhibits the pituitary hormone prolactin, a putative maternal hormone, which increases milk production. Blocking dopamine will increase prolactin. The mare should always have visual contact with the foal, but be restrained so she can not bite or kick the foal. A pole across the stall confining the mare against a wall is best. Maternal behavior can be induced in non-pregnant mares using injections of estrogen, progesterone, and the dopamine inhibitor sulpiride. Once lactation begins cervical stimulation can be used to elicit maternal behavior toward the next foal the mare sees. |
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Cornell University, Ithaca, NY 14853 |
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Houpt, K.A. |
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Equine Behaviour @ team @ |
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4456 |
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Malara, L.; De Pasquale, A.; Ingala, A.; Innella, G. |
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The influence of management on horse behavioural reactivity in therapeutic riding programs. |
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2008 |
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Management; Horses; Therapeutic Riding; Behaviour; Reactivity |
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We investigated 8 horses in five therapeutic riding centres situated in San Cataldo (Caltanissetta – I), Nicosia (Catania – II), Pellaro (Reggio Calabria – III), San Gregorio (Catania – IV), Niguarda Hospitals (Milan – V). The managements of the animals were of different typologies: Type 1, Type 2 and Type 3. In type 1 the horses were used for therapeutic riding only. Furthermore intra and interspecific social interactions were not allowed. In type 2 the horses played kinetic activities and made social interactions. In type 3 the horses were free in paddock, as intra and interspecific social interactions were allowed. The centre I, with a management of type 1, housed 1 horse (A1); the centre II, with a management of type 2, housed 1 horse (B2); the centre III, with a management of type 1, housed 1 horse (C1); the centre IV, with a management of type 2, housed 2 horses (D2 and E2); the centre V, with a management of type 3, housed 3 horses (F3, G3 and H3). Breeds of horses were: Anglo-Arab (n°1), Avelignese (n°3), Italian Selle (n°3), draught-horse crossbreed (n°1). They were 2 geldings and 6 females. Their ages ranged from 12 to 23 years. We observed a total of 64 patients affected by different pathologies: autism, motory handicap, blindness and deafness, children“s cerebral paralysis, relational problems, mental deficiency, Down”s syndrome.
The horses“ behaviour was observed at rest and during therapeutic activities with these patients. The Heart Rate (HR) was used as physiological parameter for an ethological evaluation, measured by a telemetric heart rate monitor (Polar Horse Trainer). Horses were analysed with a reactivity test for emotional homeostasis evaluation, too. Heart rate values were studied with non parametrical statistical analysis methods.
Distinct management typologies provided statistically different basal mean values of heart rate (intergroup and intragroup): Type 1 vs Type 2 (P~0.05) and Type 1 vs Type 3 (P<0.05). The comparison of heart rate during therapeutic activities of diverse management showed the following results: A1 vs B2 (P<0.05), B2 vs C1 (P<0.05), Type 1 vs Type 2 (P<0.01). Different managements, both in the same or different typologies, gave significantly diverse results (A1 vs E2: P~0.05; C1 vs E2: P~0.05; B2 vs E2: P~0.05).
This study shows that the statistic differences obtained by therapies with autistic patients derive from management conditions of Type 1. In reactivity test there aren”t any significant differences among the three management typologies. However, we recorded strong variation between medium and maximum values of heart rate, especially in Type 1 and Type 2 of management.
These high variations of heart rate indicated fear reaction of the horse to new stimuli.
This reaction could lead to dangerous accidents for patients during therapeutic activities.
Horses used in therapeutic riding programs must be evaluated before this employment. Horse's behaviour can be assessed by an ethological observation and a reactivity test. Furthermore, the horses must be guaranteed welfare conditions and must live in an environment enriched with sensorial stimuli and respectful of their physiological and ethological needs. |
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Dept. of Experimental Sciences and Applied Biotechnologies, Unit of Applied Physiology and Comparative Ethology , Faculty of Veterinary Medicine – University of Messina, Italy. |
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Innella, G. |
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Poster IESM 2008 |
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Equine Behaviour @ team @ |
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4491 |
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Jørgensen, G. H.M.; Borsheim, L.; Mejdell, C. M.; Bøe, K. E. |
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Social interactions and spacing in horses (Equus caballus) grouped according to gender |
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2008 |
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IESM 2008 |
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The aim of this study was to investigate the social behaviour and spacing between horses when grouped according to gender in homogeneous- or heterogeneous groups, and to see if the amount and severity of aggression differed in relation to gender composition.
A total of 66 horses divided in six batches were used. In each batch, horses were allotted into one mare group, one gelding group and one mixed gender group, with most groups consisting of three or four animals. Three batches were performed on Icelandic horses and three batches on riding horses and -ponies. After 4-6 weeks of acclimatisation, a trained observer recorded all social interactions using direct, continuous observation one hour in the morning and one hour in the afternoon for three consecutive days. In addition, the nearest neighbour of each horse was recorded using instantaneous sampling every 10 minutes. The horses were inspected for injuries before grouping, day one after grouping and after 4-6 weeks. Furthermore, a novel object test and a handling test (taking horse out of group) were conducted after the behavioural observations were completed.
No significant effect of gender composition was found on social interactions, spacing or injuries. Most of the aggressive interactions recorded were threats, and not aggressive interactions involving physical contact. Aggression seemed to increase with decreased space per animal and more horses per feeding place. Very few injuries were found and most were superficial. Horses showed a low degree of fearfulness in the novel object test and most horses were easy to handle in the “horse out of group test”.
In conclusion, gender composition does not seem to have any effect on aggression level, spacing or injuries in social groups of horses. |
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2National Veterinary Institute, Department of Animal Health, P.O. Box 750 Sentrum, 0106 Oslo, Norway. |
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Jørgensen, G. H.M. |
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Talk 15 min IESM 2008 |
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Equine Behaviour @ team @ |
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4489 |
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Kaczensky, P.; Ganbaatar, O.; von Wehrden,H.; Walzer, C. |
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Przewalski`s horses (Equus ferus przewalskii) and Asiatic wild asses (Equus hemionus): Similar Species, Same Habitat – Same Use? |
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2008 |
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IESM 2008 |
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Historic overlap zones of wild equids were small in Africa but extensive for Przewalski`s horses and Asiatic wild asses in Asia. Currently the Great Gobi B Strictly Protected Area in SW Mongolia is the only place where sympatric, free-ranging populations of these equids occur. This provides an unique opportunity to examine the co-existence of these little studied species and test the hypothesis that Przewalski`s horses are primarily adapted to mesic steppe habitats, whereas Asiatic wild asses are adapted to arid desert steppes and semi-deserts.
We monitored 9 Przewalski`s horses and 7 wild asses with satellite telemetry and superimposed the data on a habitat map derived from remote sensing (LANDSAT TM & ETM+-data) and ground sample plots. We tested for habitat preferences comparing use and availability with a logistic regression mixed model approach. Individuals were treated as random factors. Factor variables were tested for significant differences in subsequent Tukey post-hoc tests. Przewalski`s horses had non-exclusive home ranges of 152-826 km² and heavily selected for the most productive riparian plant communities. Asiatic wild asses also had non-exclusive home ranges, but with 4,449-6,835 km² they were 10 times larger than those of Przewalski`s horses. Asiatic wild asses seem to use plant communities more or less relative to their availability. Our results provide evidence for two parallel resource selection strategies. Our findings indicate that the Gobi areas provide an edge, rather than an optimal habitat for Przewalski`s horses. This leaves only small and isolated pockets of suitable habitat for future re-introductions. Asiatic wild asses, on the other hand, need access to large tracts of land to cope with the unpredictable resource distribution of the Gobi. Thus, Asiatic wild ass conservation requires a large scale approach. |
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Kaczensky, P. |
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IESM 2008 |
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Talk 15 min IESM 2008 |
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yes |
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Equine Behaviour @ team @ |
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4490 |
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Kharazyan, F.; Hassani, A.; Ahmadinejad, M.; Houpt, K.A. |
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The response of horses to predator stimuli. |
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2008 |
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IESM 2008 |
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Caspian pony, Arab horse, predator stimuli |
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It is unknown whether or not wild horses“ instinct has remained during their centuries of taming. The knowledge of this matter gives riders the opportunity of knowing more not only about horse behavior but also about horse and rider safety. In the current research we try to study behavior of the two Iranian horse breed (Asil & Caspian) in confrontation with stimuli from predators. We explored which kind of stimuli (olfactory stimuli accompanied by auditory stimuli) affects horses more. We groupe horses based on breed, sex and age. All horses are adult. The test area is a room that equipped with ventilator, speaker, and other facilities that needs. The time spent in the test area varies between 5 and 20 min .The experiments were designed to investigate behavioral responses (locomotive activity ( standing , walk , trot , and exploration), eliminatory behavior (defecation, urination)) and physiological responses (measure and record of adrenalin dosages in blood samples before and after facing to stimuli and measured blood”s glucose and cortisol too) of horses to novel auditory and olfactory stimuli.
We explored which kind of stimuli(Olfactory stimuli or auditory stimuli) affects horses more. The experiments were carried out under standardized conditions a total of 60 horses (30 Caspian ponies and 30 Asil horses), of different ages.
We investigated how horses respond to two predator animals" (wolf and Iranian leopard) olfactory and auditory stimulus. The olfactory stimuli were: A: Urine /feces stimuli, B: Fur-derived stimuli. And The auditory stimulus were sound of wolf and Iranian Leopard. |
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of Animal Sciences, University of Technical and Vocational, Iran |
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Kharazyan, F. |
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IESM 2008 |
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Talk 15 min IESM 2008 Fullpaper |
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yes |
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Equine Behaviour @ team @ |
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4483 |
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Klingel, H . |
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Social Organisation of the Equids |
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2008 |
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IESM 2008 |
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Two distinct types of social organisation have evolved in the Equidae. Type 1: In Horse Equus przewalskii, Plains Zebra E. quagga and Mountain Zebra E. zebra the adults live in non-territorial, stable, one-male families and as single bachelors and in bachelor groups. Family stallions have the exclusive mating rights with the mares in their harems. These consist of up to 6 unrelated mares plus their offspring, totalling up to 20 members. Mares stay in their harems until death. Stallions' tenure is from age 5-6 years, i.e. when they succeed in controlling a harem, for close to life time, but are replaced when dead or incapacitated. Harems are stable even in the absence of a stallion, indicating voluntary membership. Adolescent mares leave their parental families to become members of another harem. In Plains Zebra the adolescent mares are abducted, during an oestrus, by suitors who fight the defending family stallion/father. Successful stallions are bachelors who start a family, or family stallions enlarging their harem. Young stallions leave their parental families voluntarily at age 2-3 years and join bachelor stallion groups from where the family stallions are recruited. An individualised dominance hierarchy excists with the stallion in the alpha position. It is based on individual knowledge and recognistion of the members. Type 2: In Grevy's Zebra E. grevyi, African Wild Ass E. africanus and Asiatic Wild Ass E. hemionus adult stallions monopolise territories in which they have the exclusive mating rights. Stallions are tolerant of any conspecifics entering their territory. Bachelor stallions behave subordinately – or fight for the possession of the territory which is a prerequisite for reproduction. Mares join up to form anonymous and unstable groups or herds. The only stable unit is of a mare and her offspring. In Grevy's Zebra mares with foal join preferentially conspecifics of the same soial status, as do mares without foal. Matings take place inside the territory. There is no lasting relationship of the mare with a particular stallion, and the mare may be mated by any stallion whose territory she is visiting. Territories measure up to 10 or more square kilometres, and tenure is for several years. Grevy Zebra territorial owners leave their territories for a few hours to visit a water hole, or for months when grazing and water conditions are below requirements, and re-occupy it upon return, unchallenged. Except for a few small populations, the extant equids live in semi-arid to arid regions where environmental conditions force them to migrate seasonally or opportunistically. The ranges of the various species overlap: Mountain Zebra and Plains Zebra in South Africa and Namibia, Plains Zebra and Grevy's Zebra in Kenya and Ethiopia, Grevy's Zebra and African Wild Ass in Ethiopia, Asiatic Wild Ass and Przewalski Horse in Mongolia andChina. Although, in the overlap zones, individuals of different species are using the same resources like water and grazing simultaneously and next to each other, they rarely make closer contacts. Infanticide has been recorded in captive situations. |
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Technische Universität Braunschweig |
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Klingel, H . |
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IESM 2008 |
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Invited speaker IESM 2008 |
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yes |
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Equine Behaviour @ team @ |
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4457 |
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Komárková, M.; Dubcova, J. |
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Factors affecting suckling behaviour in loose housed domestic horses |
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2008 |
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IESM 2008 |
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Suckling, the main part of maternal investment in equids, is crucial for development and social success of the foal. As such it is of great importance in horse breeding. We examined effect of following factors mentioned in literature on behavioural parameters of suckling in loose housed domestic horses: age and sex of the suckling foal, age, parity (primiparous/multiparous), pregnancy (yes/no) and rank of the mother and sex of the foetus if the mother was pregnant. Four variables describing suckling behaviour were modelled: proportion of suckling attempts rejected by the mother, suckling duration, frequency of suckling and proportion of suckling terminated by the mother. Further, suckling terminated by another mare were analyzed. Behavioural observations were conducted at the National Stud Kladruby nad Labem (Czech Republic). Eight groups of loose housed Oldkladruby horse mares with foals were observed from 14 days (in average) after delivery to abrupt weaning (four to six months of age), each foal for 120 days at least. Within two seasons, 10 495 suckling bouts and suckling attempts were observed in 79 foals (32 males, 47 females, mothered by 59 individual mares). Horses were studied with ad libitum sampling for 6 hours per group each 14 days. Dominance status of the mother was assessed using the Clutton-Brock index (Clutton-Brock et al. 1982, Nature 350:178-180), adjusted to the number of mares in each group, and dyadic dominance-submission relationships between all group members (mares) were determined. No significant effect of pregnancy and sex of the foetus on suckling behaviour were found, except the tendency of mothers bearing female foetuses to terminate more suckling. These findings are opposite to literature, where male foetuses were connected with higher rejection rates (Duncan et al. 1984, Anim Behav 32:255-263). However, incidence of suckling attempts rejected by the mother was very low (2.24 %). No effect of pregnancy of the mother could be caused by the stud management; horses are well fed and do not suffer for nutrition stress as horses in the wild may. All variables were negatively affected by increasing foals age (as expected). Neither sex of the suckling foal, nor age of the mother did significantly affect any of the studied variables. The higher dominance rank a mare achieved the higher frequency of other group member suckling she terminated (rs = 0.49, P < 0.0001; Spearman correlation coefficients, PROC CORR, SAS). From suckling terminated by another mare (N = 190), in 93 % (N =177) it is a dominant mare who ends the suckling. Despite these significant results, suckling terminated by another mare were negligible (1.8 % from all observed suckling bouts) and agonistic interactions between dominant and submissive mares seemed not to compromise foal development. In conclusion, in loose housed mares of domestic horse with foals we have found no detrimental effect of any of literally cited factors on suckling behaviour. |
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Charles University, Departement of Zoology, Prague... |
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Komárková, M. |
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IESM 2008 |
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Talk 15 min IESM 2008 |
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Equine Behaviour @ team @ |
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4482 |
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Krueger, K. |
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Social cognition and social learning in horses |
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2008 |
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In comparison to other social animals it appears to be far more difficult to show social learning in horses, although the social background of the animals prompts the prediction that social learning should be verifiable. This demands for a thorough analysis of conditions, context and effects of social learning which might not be as obvious in horses than in other social animals. Moreover, the horse“s social cognition in general, i.e. the processing, encoding, storage, retrieval, and application of social information, needs to be examined. In previous studies we addressed the horse”s perception of it“s social environment. Our results indicate that domestic horses are not only capable of distinguishing between familiar and unfamiliar horses but also of recognizing the social status of familiar horses relative to their own. Furthermore, they extract information from observing interactions between a familiar horse and a human experimenter, and adjust their behaviour according to the observed horse”s reaction and relative dominance status when they are themselves later confronted with the experimenter in a similar situation. Additionally, we showed in pilot experiments that horses paid more attention to the gaze of dominant horses from their own social group than to that of unknown or subordinate horses. In another study we suggested that horses of both sexes are capable of determining the social affiliation, the sex and, for their own group members, the identity of individuals, by sniffing their faeces. Hence, social affiliation and dominance relationships seemed to have a major influence on the horses` motivation to pay attention to their conspecifics. In the future we will take another step towards linking the horse“s social cognitive capacities with its social ecology, social structure, and individuality. In the context of comparative cognition research on the socially complex primates, or on a range of carnivores such as corvids, canids or dolphins, horses are particularly interesting, because they are highly social, but do not rely on social hunting or cooperative raising of offspring. Also foraging is simple for horses, predator avoidance is demanding and this may be the main reason for the horse”s complex social lives and their choice of learning tactics. Hence, we will investigate the horse"s investigative behaviour towards neutral, fear-eliciting and food related novel objects. We propose that, as in other species, sociality and distinct personalities are key features for the understanding of cognitive capacities and the choice of learning strategies. |
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University of Regensburg – Biology I |
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Krueger, K. |
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IESM 2008 |
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Talk 15 min IESM 2008 |
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Equine Behaviour @ team @ |
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4462 |
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Kuhne, F.; Struwe, R.; Balzer, H.U. |
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A new, non-invasive method to assess specific strain in horses |
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2008 |
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IESM 2008 |
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Abstract |
Horses" reactions to normal environmental and training situations play an important
role the human-horse relationship. These demands on horses can either lead some
individuals to withdrawal, immobility or aggressive defence. However, the reaction to
such situations varies greatly among horses, which is reflected in individual
differences in sympathetic, parasympathetic and muscular reactivity. The observable
behavioural responses of the horses seem to be qualitatively related to the internal
state of physiological arousal. In future it should be possible to identify behavioural
signs which really do reflect internal states of the autonomic nervous system to
provide general advice concerning human handling and training in view of reducing
stress in horses.
For these purposes, we have determined responses of the vegetative nervous
system based on variation in skin potential, skin resistance and electromyogram
using non-invasive real-time measurements. All these parameters can be measured
by a SMARD-Watch-System (System of non-invasive Measurement and Analysis
for Regulatory Diagnostics), which can be externally attached to the horses using a
harness.
The physiological data will assess using a time series analysis. Thereby the changes
in the regulatory processes in each of the three physiological systems can be
determined in detail. Based on this analysis characteristic behaviour patterns will be
analysed by the variability of the regulatory processes. According to temporary shifts
in regulatory processes, stable and unstable regulation states will be determined.
Depending on the proportions of unstable regulation processes during and after
external threat, four types of regulation can be defined: the Control, Cope,
Compensate and Non-cope- type. Defined time-windows, for example a ten minutes
lasting pre- and post-test phase and a ten or twenty minutes lasting time-window for
the execution of the specific stimulus have to be chosen to decide these regulation
types.
These four regulation types and the preferred individual behaviour strategies have to
be compared to evaluate the relative frequency of occurrence of a behaviour strategy
depending on responses of the vegetative nervous system. In view of validating
behavioural indicators of emotional reactivity, the aim of this new method is to
characterize individual differences in the behavioural and physiological responses of
horses to normal environmental and training stimuli.
Evidence is provided by human and animal data that the non-invasive real-time
measurement of the vegetative nervous system based on variation in skin potential,
skin resistance etc. is a promising approach for evaluating stress and emotional
states in vertebrates. It will be explained that the chronobiological evaluation of
physiological parameters has the potential to contribute much to our understanding
and assessment of the underlying physiological processes of stress responses in
horses. |
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Division of Animal Welfare and Ethology, Justus-Liebig-University of Giessen, Germany |
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Kuhne, F. |
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Notes |
Talk 15 min IESM 2008 |
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yes |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4465 |
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Author |
Lojek, J., Gorska, B. |
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Title |
Day-Time Budgets of Konik Polski Horses (Equus caballus) Maintained in two Housing Systems |
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Conference Article |
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2008 |
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IESM 2008 |
Abbreviated Journal |
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A comparison of day-time time budgets of the konik polski horses kept in two different housing systems: free-roaming and in a limited area, was the aim of the study. The observations were carried out in the Biebrza National Park from January to June 2006 on a total of 12 horses (7 females and 5 males) aged from 2 to 5 years. The horses were kept for one year in a free-roaming system on a area of 200 ha where they formed two family bands. Later, during the winter the horses were grouped together in 1 ha enclosure with free access to water, hay given 3 times per day and oats given irregularly mainly in the winter. In the spring horses were let out again into the free-roaming system. A comparison was made of the horses“ behavior characterizing their daily activity in both housing systems. Behavioral data were collected during 122 h of direct observations in 1 hour focal samples in three periods of the day: morning (from dawn to 11:00 am), afternoon (from 11:00 am to 4:00 pm) and in the evening (from 4:00 pm until dusk). The proportion of time spent on feeding and resting behavior and locomotion activity in the total time of the observations, depending on the time of day and sex of the horses, was determined. For the evaluation of the frequency of drinking, comfort, eliminative, sexual and exploratory behavior the number of appeared cases in all horses was added up and divided by the number of observation hours. In spite of significant differences in the intensity of feeding and in the time spent on recumbency found in both housing systems depending on the time of day and sex of the horses, it seems that konik polski horses kept in different housing systems have a tendency to maintain the stable day-time time budgets, which was demonstrated by the similar time of their daily activity spent on feeding (75.9 % of total time in limited area and 71,2 % free-roaming) and resting upright (respectively 16.9 % and 15.8%) as well as cases of urination (0.18 cases/1 hour of observation in limited area and 0.17 in free-roaming in total), self- grooming (respectively 0.40 and 0.56) and mutual-grooming (0.17 and 0.12). But other signs of comfort behavior were observed nearly twice as often in the horses in the limited area (0,42) than in the free roaming system (0,22). The patterns of exploratory behavior were observed decisively more often in the case of horses in limited area (0,5 cases/1 hour of observation) than in the free-roaming system (0,07). The different housing system affected the konik polski horses” time-budget, with decreased time spent in limited area as compared to free-roaming horses in recumbent rest (respectively 2.5 % and 7,0 % of total time), locomotion activity in walk (4.9 % and 8,2 %) and trot (0.006 % and 2,3 %). Due to delivering forage to the paddock the locomotion of the horses related with searching, choosing and eating also decreased. Key words: housing systems, day-time time budgets, konik polski horses |
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Warsaw Agricultural University, Horse Breeding Department |
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Corporate Author |
Lojek, J. |
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Conference |
IESM 2008 |
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Notes |
Poster IESM 2008 |
Approved |
yes |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4478 |
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