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of 19
pro vyhledávání: '"Knud Erik Heller"'
Publikováno v:
Applied Animal Behaviour Science. 89:131-137
Mortality in mink kits held under conventional farm conditions is believed to be related to dehydration and at least partially to thereby associated competitive aggression. In this study we demonstrated that licking saliva from the commissure of the
Publikováno v:
Applied Animal Behaviour Science. 86:137-143
Two lines of female farm mink were selected among the offspring of 495 mothers kept under conventional farm conditions. A low-stereotyping line ( n =146) arose from 75 non-stereotyping females and a high-stereotyping line ( n =150) was established fr
Autor:
B Schoenecker, Knud Erik Heller
Publikováno v:
Applied Animal Behaviour Science. 80:161-170
Spontaneously stereotyping female and male bank voles were injected daily (except on days assigned for monitoring behaviour) during 3 weeks with placebo, the neurolepticum clozapine or the SSRI antidepressant citalopram. Clozapine blocks dopamine (DA
Publikováno v:
Applied Animal Behaviour Science. 68:349-357
The development of stereotypies and polydipsia was studied in wild caught bank voles (P: n=92) and their laboratory-bred offspring (F1: n=248). All animals were kept isolated in barren cages in the laboratory. In the P generation, no individuals deve
Publikováno v:
Applied Animal Behaviour Science. 67:127-135
Nest box choice experiments were carried out outside the breeding season on adult silver and blue fox vixens with no previous permanent nest box experience. Nest boxes were varied in height of placement, number of rooms, presence of entrance room or
Autor:
Knud Erik Heller, Jan Ladewig, Eskild Keller Nielsen, Erik Jørgensen, Lene Juul Pedersen, Karin Hjelholt Jensen
Publikováno v:
Physiology & Behavior. 59:741-748
Ninety-six pigs, half females and half castrated males from 12 litters, were housed in 24 groups of four litter mates. From an age of 115 days half of the groups were subjected to chronic stress for 33 days consisting of a schedule of unpredictable,
Publikováno v:
Experimental Gerontology. 26:479-486
When caged in groups of three and fed ad libitum, dominant male mice survived longer than subordinate group members which again lived longer than males caged in groups of nine, among whom no rank order was established. In groups of nine the social st
Publikováno v:
International Journal of Experimental Diabesity Research
Wild bank voles (Clethrionomys glareolus) kept in the laboratory under barren housing conditions develop high incidences of type 1 diabetes mellitus due to beta cell– specific lysis in association with the appearance of GAD65, IA-2, and insulin aut
Autor:
B Schoenecker, Knud Erik Heller
Publikováno v:
Applied animal behaviour science. 73(4)
In order to clarify the dependency of stress-induced stereotypies on dopamine (DA) and serotonin (5-HT) functioning, undisturbed and acutely stressed stereotyping bank voles were treated during 3 weeks with the commonly used human atypical neurolepti
Autor:
B Schoenecker, Knud Erik Heller
Publikováno v:
Applied animal behaviour science. 68(4)
The development of stereotypies was studied in two successive laboratory-bred generations of bank voles representing F1 (n=248) and F2 (n=270) of an originally wild caught stock. It was shown that the propensity to develop stereotypies under barren h