diplomsko delo
Miha Muznik (Author), Andrej Lavrenčič (Reviewer), Mojca Simčič (Mentor)

Abstract

V ovčereji so zajedavci splošno znan problem. Sredstva proti zajedavcem so bila sprva zelo učinkovita, a se je v zadnjih letih glede njihove učinkovitosti pojavilo kar nekaj dvomov zaradi odpornosti zajedavcev na aktivne snovi v pripravkih in drugih stranskih učinkih, ki ostanejo v mesu živali. Parazitske bolezni imajo velik gospodarski vpliv, ki se kaže v poginu živali in dodatnih stroških reje živali. V zadnjem času se selekcija ovc na odpornost proti zajedavcem kaže kot dobra rešitev za probleme povezane z antiparazitskimi sredstvi. Za odkrivanje vdora parazitov v živali obstaja več različnih metod. Najbolj znan je kazalnik FEC (število jajčec v iztrebkih), pogosto pa se uporablja tudi sistem Kontrola petih kritičnih točk, ki zajema opazovanje nosu, očesnih veznic, glave, hrbta in repa. V splošnem selekcijo ovc glede zajedavcev delimo na odpornost, prilagodljivost in število zdravljenj ter na imunski odziv in velikost vpliva okužbe. V Urugvaju so pri dvosmerni selekciji ovc na FEC dokazali 15 % genetski napredek v povprečnih plemenskih vrednostih za FEC med prvo (leto 2000) in zadnjo generacijo (leto 2019) odporne linije in 11 % genetski napredek med odporno linijo in preostalo populacijo leta 2019.

Keywords

drobnica;ovce;zajedavci;odpornost;selekcija;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [M. Muznik]
UDC: 636.3.09(043.2)
COBISS: 207415555 Link will open in a new window
Views: 82
Downloads: 10
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: Selection of sheep for resistance to parasites
Secondary abstract: Parasitism is a well-known problem in sheep breeding. Originally, antiparasitics were very effective, but in recent years doubts have arisen about their effectiveness because the parasites are resistant to the active ingredients in the preparations and other side effects such as residues of these substances remain in the animals' meat. Parasite diseases have a considerable economic impact and lead to animal losses and additional costs. Recently, the selection of sheep for parasite resistance has proven to be a good solution to the problems associated with antiparasitics. There are several methods to determine the infestation of animals with parasites. The best known indicator is the FEC (faecal egg count) and the five-point check system, in which the nose, eye mucosa, head, back and tail are examined. In general, the selection of sheep for parasites is divided into resistance, resilience, number of treatments and immune response together with the effects of infection. In a Uruguayan study on two-way selection based on FEC, a genetic improvement of 15% in average breeding values between the first (2000) and the last generation (2019) of the resistant line and a genetic improvement of 11% between the resistant line and the rest of the population in 2019 was demonstrated.
Secondary keywords: small ruminants;sheep;parasites;resistance;selection;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za zootehniko
Pages: 1 spletni vir (1 datoteka PDF (VIII, 18 str.))
ID: 25011563