M.B.H. Schilder

M.B.H. Schilder
Utrecht University | UU · dept of Animals in Science and society

phD

About

48
Publications
57,510
Reads
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3,228
Citations
Additional affiliations
January 2000 - present
Utrecht University
Position
  • Professor (Associate)

Publications

Publications (48)
Article
In the Netherlands, dogs may be seized by the police when they have killed or seriously wounded another dog. Police reports on these incidents reveal that some dogs attack vigorously and fast, without warning. In the Veterinary behavior clinic at Utrecht University these types of attacks were earlier recognized in referred dogs, leading to a set of...
Article
Full-text available
A dominance hierarchy is an important feature of the social organisation of group living animals. Although formal and/or agonistic dominance has been found in captive wolves and free-ranging dogs, applicability of the dominance concept in domestic dogs is highly debated, and quantitative data are scarce. Therefore, we investigated 7 body postures a...
Article
Full-text available
A dominance hierarchy is an important feature of the social organisation of group living animals. Although formal and/or agonistic dominance has been found in captive wolves and free-ranging dogs, applicability of the dominance concept in domestic dogs is highly debated, and quantitative data are scarce. Therefore, we investigated 7 body postures a...
Article
Full-text available
Dominance and its behavioral measures in group housed domestic dogs JOANNE A.M. VAN DER BORG 1,*, MATTHIJS B.H. SCHILDER 2, CLAUDIA VINKE 2 1Wageningen University, Behavioural Ecology Group, Department of Animal Sciences, PO Box 338, 6700 AH Wageningen, The Netherlands 2 Utrecht University, Faculty of Veterinary Medicine, Department of Animals in...
Conference Paper
Living with dogs, encountering dogs, investigating dogs, we inevitably interpret their behavior as part of our interaction with them. In our study we tested whether interpretation of dog behavior is affected by empathy for animals. Fifty seven vet-erinary students participated in the study. Students filled out a questionnaire on their experience wi...
Article
Although the social structure in a safari park population of plains zebras is similar to that observed in the wild, a number of behavioural differences between the two situations were found. Unlike in the wild situation, stallions expelled their own offspring, generally directly after the birth of a sibling. Other individuals frequently joined the...
Article
Abstract and SummaryThis study on the facial expressions of the plains zebra is concerned with those facial expressions about which the literature is not consistent as far as the description and functional naming are concerned. In order to establish which facial expressions occur a vector analysis approach was adopted in which a quantitative invent...
Article
Social dynamics and maintenance of social cohesion were studied by analysing social interventions in two groups of horses consisting of adult mares, their offspring, adult geldings and sub-adults. The animals were observed for a total of 1316 h. All relevant dyadic and triadic social interactions, including initial behaviour, possible intervention...
Article
In general, an animal's inability to perform specific behaviours (for example, due to a lack of suitable stimuli or physical restraint) is often viewed as a cause of reduced welfare of animals kept in captivity. There is increasing evidence that the opportunity to display more species-specific appetitive behaviours is beneficial to captive animals....
Article
Full-text available
Aggressive behavior displays a high heritability in our study group of Golden Retriever dogs. Alterations in brain serotonin metabolism have been described in aggressive dogs before. Here, we evaluate whether four genes of the canine serotonergic system, coding for the serotonin receptors 1A, 1B, and 2A, and the serotonin transporter, could play a...
Article
In this study, heritabilities of several measures of aggression were estimated in a group of 325 Golden Retrievers, using the Restricted Maximum Likelihood method. The studied measures were obtained either through owner opinions or by using the Canine Behavioural Assessment and Research Questionnaire (CBARQ). The aim of the study was to determine w...
Article
Reliable and valid phenotyping is crucial for our study of genetic factors underlying aggression in Golden Retriever dogs. A mail questionnaire based on the Canine Behavioral Assessment and Research Questionnaire (CBARQ; Hsu and Serpell, 2003, JAVMA 223(9):1293-1300) was used to assess behavioral phenotypes. Owners of 228 Golden Retrievers complete...
Chapter
Gedragsproblemen vereisen een andere benadering dan somatische afwijkingen. In het laatste geval bestaat het onderzoek ten minste uit anamnese, algemene indruk en algemeen onderzoek. Bij gedragspatiënten is het meestal niet nodig een lichamelijk onderzoek uit te voeren. Dat wordt alleen dan gedaan als het consult er aanleiding toe geeft.
Article
Behavioural effects of the use of a shock collar during guard dog training of German shepherd dogs were studied. Direct reactions of 32 dogs to 107 shocks showed reactions (lowering of body posture, high pitched yelps, barks and squeals, avoidance, redirection aggression, tongue flicking) that suggest stress or fear and pain. Most of these immediat...
Article
Full-text available
Molecular genetic analysis of complex traits such as aggression strongly depends on careful phenotyping of individuals. When studying canine aggression, the information provided by the owners of the dogs is often not detailed and reliable enough for this purpose. Therefore we subjected 83 golden retrievers, both aggressive and nonaggressive individ...
Article
For a horse to succeed in a show-jumping career, the individual has to possess both excellent physical abilities as well as a suitable personality to perform under challenging conditions. Forty-one Dutch Warmblood horses were used to develop personality tests and correlations between test variables and early training performances in jumping were st...
Article
To achieve optimal performance in equine sports as well as in leisure not only the physical abilities of the horse should be considered, but also the horse's personality. Besides temperamental aspects, like emotionality, or the horse's reactivity towards humans in handling situations, the learning ability of the horse is another relevant personalit...
Article
Forty-one Dutch Warmblood immature horses were used in a study to quantify temperamental traits on the basis of heart rate (HR) and heart rate variability (HRV) measures. Half of the horses received additional training from the age of 5 months onwards; the other half did not. Horses were tested at 9, 10, 21 and 22 months of age in a novel object an...
Article
Performance of horses, whether in sports or in leisure, depends on both physical abilities as well as temperament. The aim of the present work was to measure individual variation and consistency of behavioural variables, related to temperament, in young horses of the same breed and age, and reared under controlled housing conditions and management....
Article
Full-text available
Four groups of dogs, which had been subjected to housing conditions of varying quality for years, were assumed to experience different levels of stress. The groups were compared for behavioural and hormonal parameters in order to identify measures that indicate chronic stress in the dog and which may help to identify poor welfare in this species. A...
Article
Two groups of beagles, accustomed to spacious group housing, were subjected to social and spatial restriction and studied for manifestations of chronic stress with a time interval of 7 weeks between the groups. The change from outside group housing (the control period) to individual housing in small indoor kennels resulted in sustained decreases in...
Article
Full-text available
Six weeks of social and spatial restriction were used as a model to induce chronic stress in Beagles. Behavioral and physiological measurements were performed during a period of enriched spacious outdoor housing in groups (GH) and during a subsequent period of solitary housing in small indoor kennels (IH). Behavioral parameters that may indicate ch...
Article
Full-text available
Visual functions of neurologically impaired children with permanent cerebral visual impairment (CVI) can be difficult to determine. This study investigated the behavioural profile of CVI children by means of ethological observations in order to gain a better understanding of their visual functions. Video registrations of nine subjects who were unab...
Article
Stress parameters that can be measured noninvasively may help to identify poor welfare in dogs that live in private homes and institutions. Behavioural parameters are potentially useful to identify stress, but require further investigation to establish which behaviours are appropriate. In the present study, behaviours were recorded and analysed for...
Article
Background: In order to obtain a method to assess the peripheral visual field of neurologically impaired children in a clinical setting, the arc perimeter was modified into a simple behavioral visual field test. This new test is based on a graded semicircular black metal arc with a white ball at the end. The arc is rotated by an examiner around the...
Article
Poor housing conditions, harsh training sessions and uncontrollable or unpredictable social environments are examples of the situations that may lead to reduced welfare status in dogs. Individuals that suffer from poor welfare presumably experience stress and may consequently exhibit stress responses. In order to evaluate stress responses as potent...
Article
Full-text available
A problem in assessing animal welfare is that collecting data in itself may be stressful to the animals. Therefore, noninvasive methods for collecting data have to be devised and tested. A first step in investigating saliva cortisol, urinary cortisol, and urinary catecholamine as noninvasive indicators of canine well-being is the validation of thes...
Article
The applicability of the concept of dominance was investigated in a captive herd of 26 Icelandic horses and 5 ponics of different breeds. Eight out of 20 behaviours possibly related to dominance occurred frequently enough to be investigated in detail. For these eight agonistic behaviours the coverage, the unidirectionality in the exchange, and the...
Article
In a herd of semi-captive plains zebras interventions, which occurred within the harems, were investigated in order to answer the question why zebras interfered. These interventions are of interest because they regulate the contacts between companions and because, as corrective and preventive measures, they reveal the normative principles underlyin...
Article
The relationships between 4-5 adult zebra stallions, living in a safari park, were investigated over a period of 5 years. Asymmetries in the distributions of a number of behaviours could be explained by adopting dominance as an intervening variable. Dominance in stallions was of a bipolar nature with on the one hand behaviours representing subordin...
Article
The social organization of a herd of 25 plains zebras under safari park conditions and the time-budgets of 18 individuals from this herd were investigated. The zebras had organized themselves in harem groups. Stallions appeared to spend more time acting socially than did other sex-age classes and they spent less time feeding. Social behaviours were...

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