[Composition of free amino acids in blood and muscle of gobi Perccottus glehni at the period of preparation and completion of hibernation].
The fresh-water fish gobi Perccottus glehni survives after wintering in ponds frozen in winter until the very bottom. In adaptation of poikilothermal animals to wintering at nearzero temperatures, an essential role is played by free amino acids: accumulation of a high amount of some particular acid at the period of preparation to the state of hibernation can indicate its protector role in the low-temperature adaptation. In the present wok it has been shown that as early as by the end of August in the gobi muscle there occurs a 3-fold increase, as compared with that in July, of concentration of taurine whose pool after this accounts for 50 % of the total pool of the muscle tissue free amino acids. During December and after the 3-month hibernation in ice, it exceeded the April and July level 8 and 4 times, respectively, and amounted to 50 % of the total free amino acid pool for muscle and to 40 % for blood. Several days before the beginning of hibernation under natural conditions, both in blood and in muscle there was revealed disappearance of a sharp decrease of essential amino acid concentrations. An essential peculiarity of the change composition of free amino acids after hibernation was a significance increase of alanine concentration in muscle - 3.5 times as compared with that in July and 1.4-1.8 times as compared with December measurements. The total pool of free amino acids in muscle as compared with that in July rose in December almost 1.5 times (34.76 +/- 1.12 micromole/g wet weight), while after hibernation - 2 times. Peculiarities of the taurine accumulation before the onset of winter colds allow suggesting that the role taurine consists in provision of a possibility of survival of eurithermal fish at the nearzero temperatures.
Karanova
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D000222:Adaptation, Physiological / Q000502:physiology*; D000596:Amino Acids / Q000097:blood*; D000818:Animals; D006605:Hibernation / Q000502:physiology*; D018482:Muscle, Skeletal / Q000378:metabolism*; D010473:Perciformes / Q000378:metabolism*; D012621:Seasons
D000596:Amino Acids