This paper gives the main characteristics of animal production in Croatia and analyzes its competitiveness as a basis for possible collaboration between the countries of Quadrilateral in the field of animal production. It describes the current state and recent trends in milk and meat production and their perspective after Croatian accession to EU. Particular emphasis is put on the analysis of trade relations with countries of the Quadrilateral. The main characteristic of Croatian livestock production is the small average farm size and low productivity what could be the main reasons for a general inefficient domestic livestock production and dependence on import of both live animals and animal products (milk and meat). In order to increase the competitiveness of Croatian farmers’ and meet the increasing for milk and meat additional farm concentration and the cooperation of small holders as well as a more effective use of local resources such as land, labour and livestock tradition is necessary. In addition, after EU accession Croatian livestock sector can expect further integration in international trade and better opportunities for export (e.g. elimination of protective tariffs) on common EU market, especially with regard to products that are lacking in EU (e.g. beef). In this way collaboration between countries of Quadrilateral through development and implementation of new technologies can contribute to a better use of specific national resources and better production efficiency.

Cilj rada je utvrditi utjecaj polimorfizma MC4R gena na svojstva kakvoce polovica i klasa prema SEUROP sustavu ocjene. Tovljenici (n=130) bili su križanci pasmina ♂P x (♂VJ x ♀SL), a utovljeni su po konvencionalnoj tehnologiji velikih farmi do prosjecne žive mase 110, 3±15, 66 kg. Nakon klanja utvrđene su mase trupova, metodom “dvije tocke” izmjerena je debljina slanine, promjer MLD, postotak misicne mase i SEUROP trgovacke klase. Genomska DNA je izolirana iz uzoraka krvi (venae jugularis), te je potom izvrsena genotipizacija na poziciji 1426 (G/A) nukleotidne sekvence MC4R gena koristeci PCR-RFLP TaqI test. U populaciji tovljenika utvrđene frekvencije genotipova AA, AG i GG su bile redom 0, 09, 0, 43 i 0, 48 te su se znacajno razlikovale (p<0, 05) od ocekivanog prosjeka prema Hardy Weinbergovom zakonu. Utjecaj polimorfizma MC4R gena utvrđen je kroz razlike između tovljenika genotipova AA, AG i GG za debljinu slanine (p<0, 05) i razlicite distribucije klasa trupova ocijenjenih prema SEUROP sustavu.

The paper deals with the problem of mining production planning by means of deterministic and fuzzy linear programming (LP). After the introduction, short inspection of the general settings in deterministic and fuzzy LP model is presented. An application and a comparative analysis of results obtained by both LP models was demonstrated on the example of the Mining Basin “Kolubara”, with four working open pit mines (OPM). Along with the assessment that the LP is an effi cient mathematical modelling tool in mining planning, and after comparing advantages and defi ciencies of the deterministic and fuzzy LP, the conclusion states that it is necessary to involve both of LP model approach in searching for the optimal production plan. The fi nal selection of solution lies with the decision maker.