Valentino Držaić

Effect of sex on slaughter traits and carcass measurements of Travnik pramenka sheep lambs

Cilj ovog istraživanja bio je utvrditi utjecaj spola na klaonicke pokazatelje i razvijenost trupova janjadi travnicke pramenke. U tu svrhu, u mjesecu travnju 2017. godine, zaklano je ukupno 70 janjadi travnicke pramenke, od toga 48 muske i 22 ženske. Janjad je uzgojena na obiteljskom poljoprivrednom gospodarstvu u Velikoj Peratovici – Bjelovarsko-bilogorska županija. U dobi između 90 i 100 dana janjad je pojedinacno izvagana i podvrgnuta klanju. Neposredno nakon klanja i klaonicke obrade obavljenja su mjerenja trupova i pojedinih organa. Prosjecna tjelesna masa janjadi izmjerena neposredno prije klanja bila je 21, 85 kg s tim da je muska janjad bila statisticki znacajno (P<0, 05) teža od ženske (22, 47 kg : 20, 38 kg). Utvrđena je prosjecna masa janjeceg trupa od 11, 04 kg koja je bila statisticki znacajno veca (P<0, 05) u muskih (11, 32 kg) u odnosu na trupove ženske janjadi (10, 42). Iako je randman ženske janjadi (51, 04%) bio veci od onog utvrđenog u muske travnicke janjadi (50, 33%) razlika nije bila statisticki znacajna. Dubina prsa i duljina stražnje noge bile su znacajno razlicite ovisno o spolu janjadi (p<0, 05 ; p<0, 01). Temeljem utvrđenih mjera klaonicki obrađenih trupova, trupovi istraživane janjadi travnicke pramenke pripadaju kategoriji lakih janjecih trupova.

Heavy metals bioaccumulation by edible saprophytic mushrooms

The aim of this study was to determine the concentration of heavy metals Fe, Zn, Cu, Ni, Pb i Cd in certain edible species of saprophytic fungi and the substrate on three area of sampling, and to assess the role of individual species as biological indicators of environmental pollution. In this study were used three species of wild edible mushrooms (Agaricus macroarpus Bohus, Clitocybe inversa (Scop. ex Fr.) Pat. and Macrolepiota procera (Scop. ex Fr.) Sing.,). Completely developed and mature fruiting bodies were collected at random selection in localities of Trakoscan, Jaska and Petrova gora. At the same time, the substrate soil samples were collected from the upper horizon (0-10). Determination of heavy metals in mushrooms and the substrate soil were carried out by X-ray Fluorescence Spectrometry. The data obtained were analysed by means of the statistical program SAS V9.2. Significant differences were found in the concentrations of Fe, Zn, Cu, Ni, Pb and Cd between analysed species of mushrooms and localities of sampling (P 1). The consumption of investigated mushrooms poses no toxicological risk to human health due to low concentrations analysed metals.