RESEARCH REGARDING THE INFLUENCE OF REARING CONDITIONS ON GLYCOGEN QUANTITY AT RAINBOW AND BROOK TROUT BREEDS REARED IN CHEITA TROUT FARM FROM NEAMT COUNTY, ROMANIA
Mădălina Iuliana Iordache, E. Ungureanu, E. Măgdici, C.E. Nistor, I.B. Pagu, B. Păsărin
The current paper aimed to study the influence of artificial rearing conditions on glycogen quantity for two trout breeds - rainbow trout (Oncorhynchus mykiss - Walbaum, 1792) and brook trout (Salvelinus fontinalis - Richardson, 1836), analysing 40 individuals, 20 individuals from each breed, belonging to Cheita trout farm from Neamt County. The current research is a part of an ample study designed to enlighten the differences of nutritional value for human consumption of trout meat reared in natural and artificial conditions. Trout represent also an important source of carbohydrates, through its reserves of hepatic and muscular glycogen. Glycogen is synthesised in animal organism by the mono-carbohydrates supplied by food, and in the case of an insufficient contribution of alimentary carbohydrates, it is formed from the resulted products of lipids and proteins catabolism. The obtained data resulted at the end of effectuated analysis on hepatic tissue record mean values of 2.325±0.892 g/100g for rainbow trout and of 3.832±0.450 g/100g for brook trout. In the case of muscular tissue were recorded mean values of 0.098±0.016 g/100g for rainbow trout and 0.130±0.044 g/100g for brook trout. Non-uniformity of biological material as regarding the corporal development and implicit of the tracked carbohydrates parameters have a great influence on the results, increasing in a considerable way their variability degree.
Key words: hepatic glycogen, muscular glycogen, Oncorhynchus mykiss, Salvelinus fontinalis