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1.
Energy metabolism, growth performance, body composition, meat quality and boar taint compounds in immunocastrated pigs
Nina Batorek Lukač, 2015, doktorsko delo/naloga

Opis: In recent years, immunocastration, a vaccination against gonadotropin releasing hormone, has been proposed as an alternative to surgical castration of intact male pigs without anaesthesia. However, the effects of immunocastration on metabolic changes, nutritional requirements and growth potential have not been quantified. Thus in the present thesis, the meta-analytical approach was used to quantitatively synthesize the effects of immunocastration and four studies were conducted to evaluate the effects of quantitative and qualitative feed restriction on growth performance, heat production and energy metabolism, carcass and meat quality. Results show that boar taint compounds are dramatically reduced in immunocastrates, still they remain slightly higher than in surgical castrates. Immunocastrates are less feed efficient, fatter but grow more rapidly and may have better meat quality than entire males. Compared to surgical castrates, immunocastrates have superior performance with no difference in meat quality. It is more economical to fatten immunocastrates than surgical castrates, but production costs and carcass quality are less favourable than in entire males because of the huge increase in voluntary feed intake during the weeks preceding slaughter. Applying quantitative feed restriction after active immunization did not significantly affect growth performance or carcass composition; however, restrictively fed immunocastrates were closer to entire males, whereas ad libitum fed immunocastrates were closer to surgical castrates. Meat quality is also unchanged by the restriction. However, higher incidence of carcass lesions in restricted immunocastrates together with higher plasma cortisol level indicates more aggression prior to slaughter and can be considered as a negative aspect of the quantitative restriction. Total heat production, assumed to be the major factor contributing to the differences in feed efficiency of pigs, is changed after the immunocastration. Additional energy retained due to higher feed intake is directed towards lipid deposition. Increased fatness of immunocastrates is a result of increased daily lipid deposition caused by higher energy intake, lower fasting heat production and improved energy retention. Hence, dietary energy intake should be limited after immunocastration. Moreover, according to the results of the nitrogen balance study, dietary crude protein content could also be decreased. By reducing net energy concentration of the diet up to 10 % using higher fibre content, similar energy efficiency (gain to net energy intake ratio) may be achieved, with an advantage in terms of reduced lipid deposition, and no effect on growth rate after effective immunization. This is particularly important when immunocastrated pigs are fattened to higher body weights, i.e. when longer delays between full immunization and slaughter are practiced.
Ključne besede: pig, immunocastration, growth performance, carcass characteristics, meat quality, heat production, lipid metabolism, fat deposition, feed restriction
Objavljeno: 27.07.2015; Ogledov: 1269; Prenosov: 88
.pdf Celotno besedilo (19,44 MB)

2.
Regression analysis of variables describing poultry meat supply in European countries
Miro Simonič, Ksenija Dumičić, Gabrijel Devetak, 2012, izvirni znanstveni članek

Opis: In this paper, based on the analysis of official FAOSTAT and EUROSTAT data on poultry meat for 38 European countries for years 2007 and 2009, two hypotheses were examined. Firstly, considering four clustering variables on poultry meat, i.e. production, export and import in kg/capita, as well as the producer price in US $/t, using descriptive exploratory and cluster analysis, the hypothesis that the clusters of countries may be recognized was confirmed. As a result six clusters of similar countries were distinguished. Secondly, based on multiple regression analysis, this paper proofs that there exists the statistically significant relationship of poultry meat production on export and import of that kind of meat, all measured in kg/capita. There is also a high correlation between production, as a dependent, and each of two independent variables.
Ključne besede: poultry meat, marketing strategy, cluster analysis, correlation, multiple regression
Objavljeno: 10.07.2015; Ogledov: 520; Prenosov: 174
.pdf Celotno besedilo (780,46 KB)
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3.
Market analysis for of the oxen meat sale
Milan Repič, Martin Kovačič, Darja Majkovič, 2004, izvirni znanstveni članek

Ključne besede: market research, oxen meat, questionnaire, interview, consumer
Objavljeno: 10.07.2015; Ogledov: 299; Prenosov: 7
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4.
Measuring public procurement for innovation on the country level and the role of ICT support
Kristina Detelj, Tanja Markovič-Hribernik, Igor Pihir, 2015, izvirni znanstveni članek

Opis: Using of public procurement as a tool for promoting innovations has captured interest of many researchers in recent years. However, most of the research is focused on the impact of public procurement on the company's innovativeness. The article discusses the findings of the literature on this topic and proposes a model on how to transfer the concept from the company level to the level of the whole country. One of the biggest problems is unavailability of appropriate measures of this phenomenon, so the authors suggest that the concept of Public procurement for innovation can be approximated by participation of criterion of the most economically advantageous tender (MEAT). Implementation of this criterion in choosing the best offer can be supported and facilitated by using of ICT which can improve the efficiency of procurement process and enable more innovations.
Ključne besede: public procurement, innovation, most economically advantageous tender, MEAT, information and communication technology
Objavljeno: 03.08.2017; Ogledov: 211; Prenosov: 33
.pdf Celotno besedilo (868,61 KB)
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5.
Effect of immunocastration on performance of Slovenian pig fatteners
Martin Škrlep, Nina Batorek Lukač, Blaž Šegula, Marta Zajec, Stane Košorok, Marija Glavač-Vnuk, Valentina Kubale, Gregor Fazarinc, Marjeta Čandek-Potokar, 2011, izvirni znanstveni članek

Opis: The influence of the immunocastration (immunisation against GnRH) on pig performance (growth, carcass and meat quality traits) was investigated in two parallel experiments (on two farms) with two crossbreeds – G1 (50% Duroc) and G2 (50% Pietrain). Within the crossbreed, the pigs were assigned to three experimental groups; entire males (EM, n=49), immunocastrates (IC, n=45) and surgical castrates (SC, n=45). Those assigned to IC group were vaccinated at the age of 12 and 19 weeks. Pigs were individually housed, their feed intake (ad libitum) and weight (at 12, 19 and 24 weeks) were recorded. At the age of 24 weeks, the pigs were slaughtered and their carcass and meat quality traits were assessed. We hypothesized that treatment response could have been different in two crossbreeds. However the interaction was insignificant, thus the treatment effect is presented on pooled results for both crossbreeds. Until the revaccination, IC were similar to EM pigs, thereafter they exhibited an increase in feed intake and growth rate. Overall, they presented an advantage in growth rate and feed efficiency as compared to SC. They also exhibited better carcass properties as SC without any major effect on meat quality. The present study provides the initial information on the immunocastration effect in Slovenian herds that should further be supported by testing it in usual rearing conditions and group housing.
Ključne besede: pig, immunocastration, growth performance, carcass properties, meat quality
Objavljeno: 24.08.2017; Ogledov: 496; Prenosov: 34
.pdf Celotno besedilo (122,14 KB)
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6.
Carcass and meat quality traits of pig fatteners from Slovenian breeding programme
Maja Prevolnik Povše, Martin Škrlep, Dejan Škorjanc, Marjeta Čandek-Potokar, 2008, objavljeni znanstveni prispevek na konferenci

Opis: The aim of the present study was the comparison of carcass and meat quality traits of commercial pigs of various crossbreeds from two major Slovenian herds. The analysis is based on phenotypic data from field trials which have been collected in the last past five years within the Slovenian breeding programme. Important differences in carcass traits were observed between two herds and were associated to different crossbreeds used. In spite of that economically important result on the slaughter line (lean meat %) was similar for both herds. Meat quality traits were also significantly different between the two herds. Again, the difference could be ascribed to crossbreeds used. However, since the herd effect is connected with abattoir effect, different ante-mortem conditions and/or lower robustness of these animals to premortal stress could also be contributed to the observed differences. The presented results give important information on the state-of-the-art regarding meat quality of Slovenian pigs.
Ključne besede: pigs, carcass quality, meat, breeding programs, Slovenia
Objavljeno: 13.07.2017; Ogledov: 375; Prenosov: 44
.pdf Celotno besedilo (140,96 KB)
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7.
Influence of added fat on the quality of poultry meat
Vladimir Strelec, Marko Volk, Ciril Varga, 2000, objavljeni znanstveni prispevek na konferenci

Opis: In testing conditions six groups of broiler chickens were tested for the effect of feed addition Bergafat and standardised fats added in the feed in the quantity of 3,9% in starter, 8,5% in grower, 8,6% in finisher, and 9,3% in endfinisher. Among testing groups no differences in the achieved productionresults were stated. The organoleptic evaluation of meat however showed considerable differences in the intensity of aroma, smell and taste.
Ključne besede: meat, chickens meat, organoleptic evaluation of meat, poultry fat, added fat
Objavljeno: 20.07.2017; Ogledov: 255; Prenosov: 46
.pdf Celotno besedilo (305,20 KB)
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8.
Poultry meat in the production of meat products
Ciril Varga, Vladimir Strelec, Marko Volk, 2000, objavljeni strokovni prispevek na konferenci

Opis: The authors had studied the possibility of the use of various types of poultrymeat, factors which could have and adverse impact upon the microbiological quality of the raw material, which technology of meat products production and quality of products.
Ključne besede: poultry meat, quality, technology, quality of products
Objavljeno: 20.07.2017; Ogledov: 370; Prenosov: 55
.pdf Celotno besedilo (217,71 KB)
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