Čimbenici plodnosti crne slavonske svinje

master's thesis

• Author: Ivana Obad
• Mentor: Zoran Luković (mentor)
• Committee member: Zoran Luković (predsjednik povjerenstva)
• Committee member: Danijel Karolyi (član povjerenstva)
• Committee member: Krešimir Salajpal (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Animal Science and Technology); Zagreb
• Defense date and country: 2016-07-07, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy; Animal Husbandry

Abstract

Crna slavonska pasmina svinja najčešće se drži na obiteljskim gospodarstvima, koja imaju različite uvjete držanja. Utjecaji okoliša na plodnost izraženiji su nego u intenzivnim sustavima. Cilj rada je bio utvrditi i analizirati čimbenike koji utječu na plodnost ove pasmine. Analizirano je 10 233 zapisa o plodnosti krmača crne slavonske svinje prikupljenih na 3 191 životinji iz razdoblja od 2000. do 2015. godine. Konačan set podataka za analizu čimbenika na veličinu legla sadržavao je 10 127 zapisa o prasenjima. Sistematski dio modela uključivao je sljedeće utjecaje: redni broj prasenja krmače, sezonu pripusta, te utjecaj nerasta – oca legla. Svi utjecaji u modelu bili su statistički značajni. Utvrđeno je da utjecaj sezone pripusta uzrokovan klimatskim varijacijama unutar godine nije jasno izražen, što se može pripisati činjenici da je veličina legla crne slavonske svinje niska, dok je dugoročni utjecaj sezone pripusta izraženiji. Broj živooprasene prasadi raste do četvrtog legla, nakon čega dolazi do stagnacije te ponovnog rasta nakon sedmog legla. Uočena je velika varijabilnost između legala krmača pripuštenih pod različite nerastove, te razlika između najmanje i najveće procjene utjecaja oca nerasta na veličinu legla iznosi čak 10 prasadi.

Abstract (english)

Black Slavonian breed of pig is usually kept on family farms, that has different keeping conditions. Environmental effects on fertility are more obvious than in intensive systems. Aim of the study was to determine and analyse the factors that affect the fertility of the Black Slavonian Pig. There were 10 233 records of fertility of Black Slavonian pig analyzed, collected on 3 191 animals in period from 1997 to 2015. Variables in data set included breeding organization, identification number, serial number of sows farrowing, farrowing date, identification number of boars - father of litter, date of mating, number of piglets born alive. The final data set for analysis of factors litter size contained 10 127 records of farrowing. The impact of the breeding season due to climatic variations within the year was not significantly expressed, which can be attributed to the fact that the litter size of Black Slavonian pig is low. The long termed effect of mating season was more obvious. The research confirmed that the number of piglets born alive rises to fourth litter with additional increase after seventh litter. Variability between litters of sows admits caused by different boars is observed, and the difference between highest and lowest estimate is 10 piglets.

• Keywords: crna slavonska svinja; cimbenici plodnosti; velicina legla
• Keywords (english): Black Slavonian pigs; fertility factors; litter size
• Language: croatian
• URN:NBN: urn:nbn:hr:204:898604
• Study programme: Title: Proizvodnja i prerada mesa; Study programme type: sveučilišni; Study level: diplomski; Academic / professional title: magistar / magistra inženjer/inženjerka proizvodnje i prerade mesa (magistar / magistra inženjer/inženjerka proizvodnje i prerade mesa)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Repository: Repository Faculty of Agriculture University of Zagreb
• Created on: 2016-07-26 09:32:51