Age changes in the mineral composition of blood of fur animals
Pages: 56-61.
Bespyatykh O.Yu., PhD, assistant professor, leading researcher
Russian Research Institute of Game Management and Fur Farming, Kirov, Russia
E-mail: b__oleg@mail.ru
For successful cultivation of fur animals it is important to know the regularities of mineral metabolism in postnatal ontogenesis. Therefore the aim of this work was to study age changes in mineral composition of blood of fur animals. In diets and in whole blood of fur animals the content of mineral elements (P, Ca, K, Na, Mg, Fe, Co, Mn, Cu, Cr, Zn, Se, I, In, Si, Ni, V, Li, Sn, Sr, Al, Pb, Cd, Hg, As) was determined by using atomic emission and mass spectrometry methods on Optima-2000 DM and ELAN-9000 (Perkin-Elmer, USA). In the diet of polar foxes and foxes at different stages of postnatal ontogenesis macroelements: phosphorus, calcium, potassium, natrium, magnesium and microelements: iron, manganese, zinc, silicon, aluminum, strontium were detected in large concentrations. The concentration of other elements does not exceed 1 mmol/kg. Specific mineral composition of blood corresponds to each age group of polar foxes and foxes. Concentrations of most mineral elements are maximum in the transition phase and/or phase of natural nutrition (up to 3 months age). They correspond to the intensive development of young animals when internal organs grow and develop; the heat production and the intensity of metabolism changes; hair begins to form. Then the concentration of mineral elements in the blood are reduced (or minimum), which corresponds to phases of puberty and mature body (7-and 12-month animals). The animals are fully formed all the organs and tissues at this point. The metabolism of the body is stabilized in the maturation phase and the spring moult of winter hair. Age dynamics of the content of macro- and microelements in the blood of polar foxes and foxes is probably caused by significant changes in the process of their growth and development which aimed to adaptation of organism to environment and changing of nature of nutrition in the process of postnatal ontogenesis.
Keywords: mineral metabolism, blood, polar fox, fox, ontogeny, diet
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