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The chemical composition and fatty acid profile of milk from French Alpine dairy goats, obtained during the period of summer feeding and winter feeding, were studied. Milk samples were collected at one-month intervals, to determine dry matter, solids non-fat, protein, fat, fatty acid profile, lactose, urea and somatic cell count. The fatty acid composition of milk fat was determined for particular...
The goal of the study was to evaluate the magnitude of lamb stress reaction by means of measurements of blood cortisol level changes during weaning and short pre-slaughter transport depending on the breed and their age. Fifty- and hundred-day-old Pomeranian (P), Ile de France (IdF), and crossbreeds of F1 generation (PIdF) ram lambs were used in the present study. The blood was collected from the jugular...
The estimation of chemical composition and nutritive value of protein of lamb meat from the quadriceps muscle of the thingh (m. quadriceps femoris) was carried out in this studies. Meat proceeded from single ram lambs of Pomeranian breed (P), ile de france breed (IF) and their cross-breeds F1 (PIF), at the age of 50 days, eight heads from each group. Dry matter (W), total protein (B), total fat and...
Levels of Cortisol in blood serum of 50- and 100-day-old rams of Kamieniecka sheep (K) and its crossbreds (F,) with Berrichon du Cher (KxBCH) and Blackhead (K x B) rams before pre-slaughter handling and after slaughter were determined. No relationship between the Cortisol levels and the genotype of the animals were found. However, age-dependent differences in the concentrations of the hormone (P ≤...
The cortisol level was estimated, before and after slaughter, in the serum of 80-days-old rams of the kamieniecka sheep (K) and their crossbred (F₁) with rams of the Berrichon du Cher (KxBCH), Blackhead (KxCz) and Ile de France (KxIF) race. The cortisol level tested before the preslaughter movement was different in the studied genetic groups of lambs. The highest initial concentration of the hormone...
Badania przeprowadzono na 16 maciorkach wieloródkach, u których zwiększono częstotliwość wykotów w ciągu roku do 1.86, stosując stymulację hormonalną metodą Chrono- Gest. Próby krwi do badań hematologicznych i biochemicznych pobierano czterokrotnie: I - w 100. dniu 1. badanej laktacji, który był równocześnie 55. dniem kolejnej ciąży, II - 140. dniu ciąży, III - w 30. dniu 2. badanej laktacji i IV...
Badania przeprowadzono na 32 100-dniowych tryczkach merynosa polskiego i jego mieszańcach po trykach ras: czarnogłówka, ile de france oraz teksel. W mięśniach czterogłowych uda (quadriceps femoris) określono skład chemiczny, cechy fizykochemiczne i sensoryczne oraz skład kwasów tłuszczowych tłuszczu śródmięśniowego. Oznaczenia wykonano w próbach świeżych oraz po 30 i 180 dniach przechowywania w temp...
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