Morpho-Functional Peculiarities of Erythrocytes of Baikal Coregonid Fishes Grown in Natural and Artificial Conditions
V. M. YAKHNENKO1, I. V. KLIMENKOV1, N. P. SUDAKOV2, A. Yu. BELYSHENKO1, L. V. SUKHANOVA1, O. Yu. GLYZINA1, A. M. MAMONTOV1, Yu. P. SAPOZHNIKOVA1
1Limnological Institute, SB RAS, 664033, Irkutsk, Ulan-Batorskaya str., 3
2Scientific Center of Surgery and Traumatology, 664033, Irkutsk, Bortsov Revolyutsii str., 1
Keywords: эритроциты, цитометрические параметры, гемоглобин, кислородная емкость крови, митохондрии, сиговые рыбы, гибриды, оз. Байкал, пресноводный аквариальный комплекс, erythrocytes, cytometric parameters, hemoglobin, mitochondria, coregonid fishes, hybrids, Lake Baikal, freshwater aquarium complex
Abstract
The structure and cytometric indices of red blood cells ( RBC ), hemoglobin content ( Hb ), oxygen capacity of blood ( OCB ) of the omul, whitefish and their hybrids from Lake Baikal and grown in the Freshwater Aquarium Complex ( FAC ) were analyzed. Cytometric indicators of red blood cells of omul and whitefish from natural populations were higher than that of the same fishes from aquariums under identical conditions. The conditions of aquariums had the least effect on the form of red blood cells of Siberian whitefish and hybrids: female Siberian whitefish and male omul F1 (f Sw ´ m Om). Female Lacustrine whitefishes, that had the largest erythrocytes, determined the size of the cells in hybrids: female Lacustrine whitefish and male omul (f Lw ´ m Om). Among all the studied forms of Coregonid fishes cytometric parameters of erythrocytes of the fishes from warm aquariums were higher than that of the fishes from cold aquariums. The size of the erythrocyte nucleus in artificially propagated hybrids was smaller both in comparison to their parents from natural populations and to whitefish and omul grown in aquariums under the same conditions. Erythrocytes of the whitefish from natural populations had a pool that was 20-30 % richer in functionally active mitochondria than that of the whitefish from aquariums. Disrupted mitochondrial structure was also observed in the latter. The obtained results indicate that the peculiarities of metabolism connected with oxygen transport in the studied forms of Baikal coregonids are determined by adaptation to the conditions of the occupied ecological niches.
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