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External hereditary defects in the domestic rabbit
MRÁZOVÁ, Veronika
The goal of this diploma thesis was to clarify the anatomy and evaluation of the exterior of the rabbit, the individual external hereditary defects that this di-ploma thesis focused on and the issue of genetics and breeding on the basis of infor-mation from available literature and scientific resources. On the basis of this information, be assembled a questionnaire, which was presented to breeders over the course of several months. On the basis of 122 responses, be subsequently found that breed-ers most often encounter malocclusion (overgrown teeth), hypospadias (cleft penis), cryptorchidism (undescended testicle(s)) and buphthalmia (underdeveloped tear ca-nals in one or both eyes, with a range of manifestations). On the contrary, it was found that hobby breeders very infrequently encounter alopecia (local or general hair loss) and limb luxation (dislocation of the thoracic or pelvic limbs). In the conclusion of this diploma thesis, the collective results were also used as a basis to calculate the statistical estimate of potential numbers of individuals suffering from a specific defect. These numbers were calculated on the basis of the most recent census of rabbits owned by hobby breeders in 2020, which took place under the patronage of the Ministry of Agriculture. The Ministry stated that in 2020 there were 4,680,000 rabbits in the Czech Republic. The current potential incidence of malocclusion was calculated as being 261, 062 individuals, for hypospadias the number was 157,136, for cryptorchidism the number was 78,984, for buphthalmia it was 79,815, and for alopecia and limb luxation the numbers were 59,861 and 18,291 respectively. The potential incidence of defects was collectively estimated at 655,149 rabbits, which is 14.1 % of the total population in this country. A possible solution to this situation was proposed in conclusion. Breeders should particularly focus on greater awareness regarding monitored and also other external hereditary defects and illnesses, so that these defects and illnesses can be identified on time and appropriately and such individuals can be eliminated from the gene pool. Breeders should also avoid inbreeding if they do not have sufficient professional or practical experience in relation to this issue.
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