SLAUGHTER CHARACTERISTICS AND CARCASS TRAITS OF TRAVNIK PRAMENKA SHEEP

Abstract

Cilj ovog rada bio je utvrditi klaoničke pokazatelje, odlike trupova te boju i pH vrijednost mišićnog tkiva ovaca, ovnova i kastrata travničke pramenke. U tu svrhu zaklano je 69 odraslih grla travničke pramenke, uključujući: 25 ovaca, 22 ovna i 22 kastrata. Klanje životinja je provedeno u ovlaštenoj klaonici, a trupovi su podvrgnuti standardnim postupcima obrade, nakon koje je utvrđena masa svih unutarnjih organa, zatim kože s donjim dijelovima nogu te obrađenih trupova. Neposredno nakon klanja obavljena su mjerenja trupova i određivanje boje mesa na mišićnoj regiji M. rectus abdominis (MRA) i M. semitendinosus (MS), dok je određivanje vrijednosti pH M. longissimus dorsi (MLD) provedeno unutar 45 minuta nakon klanja (pH45) te 24 sata nakon klanja (pH24). Istraživanjem je utvrđeno postojanje značajnih razlika (P<0,01) u tjelesnoj masi neposredno prije klanja između grla istraživanih kategorija (ovce 59,47 kg; ovnovi 71,19 kg; kastrati 68,05 kg), što se značajno (P<0,01) odrazilo i na masu toplih te hladnih trupova. Najviši randman (49,54%) utvrđen je u kastriranih, a najniži u rasplodnih ovnova (47,75%). Podjednake vrijednosti utvrđene su za duljinu, dubinu i širinu trupa, dok se duljina stražnje noge značajno razlikovala između svih istraživanih kategorija (P<0,05 i P<0,01). Najveća masa jetre utvrđena je u ovnova, dok prosječne vrijednosti pH (pH45 i pH24) MLD-a između istraživanih kategorija ovaca nisu bile značajne. Utvrđena je niža vrijednost L* i značajno (P<0,01) više vrijednosti a* i b* pokazatelja boje MRA u ovaca nego u ovnova i kastrata. Vrijednost L* pokazatelja MS-a je bila najniža (P<0,01) u ovaca, vrijednost a* pokazatelja najviša (P<0,05) u kastrata, dok se vrijednost b* pokazatelja značajno razlikovala između svih istraživanih kategorija (P<0,05 i P<0,01).The aim of this study was to determine slaughter characteristics, carcass traits and colour value and pH indicators in muscular tissue of ewes, rams and wethers of Travnik Pramenka sheep. For that purpose, 69 mature sheep’s were slaughtered at three sex categories: 25 ewes, 22 rams and 22 wethlers. Animals were slaughtered in authorized abattoir, and carcasses were submitted to standard procedures of processing, after that all internal organs were weight and skin with lower legs and carcass weight were determinated. After that carcass measurements were taken, pH values (pH45 and pH24) were determined in M. longissimus dorsi (MLD) and colour indicators in M. ractus abdominis (MRA) and M. semitendinosus (MS). Significant (P<0.01) differences were determined in slaughter weight among researched categories (ewes 59.47 kg; rams 71.19 kg; wethers 68.05 kg), that were significantly (P<0.01) reflected on hot and cold carcass weight. The weight of certain internal organs were not significantly different, except liver weight that was the largest (P<0.01) in rams. pH values (pH45 and pH24) of MLD were not significantly different among researched categories. Lower L* and significantly (P<0.01) higher values of a* and b* indicators of colour MRA were determined in ewes then in rams and wethlers. Also, the value of L* indicator of MS was the lowest (P<0.01) in ewes, while a* value was the highest (P<0.05) in wethlers. b* value was significantly different between all researched categories (P<0.05 and P<0.01). Equal values were determined for carcass length, depth and width, while the hind limb length was significantly different between researched categories of Travnik Pramenka sheep

    Similar works