Koroleva I.M. The status of whitefish population from Chuna Lake in the Lapland Biosphere Reserve Russia. International Journal of Environmental Research. 2008, V.2, №2, p. 111-124.

Int. J. Environ. Res., 2(2): 111-124, Spring 2008 Age, yrs □ 1961 ■ 2000-2001 Fig. 3. Whitefish age distribution in Lake Chuna in the 1961 and 2000-2001 catches 1949 2000-2001 Length, cm Y = 21,2503*exp(0,0894*x) r = 0,9192,Y = -1029,17698 + 44,6471084*x Length, cm Y = 6,5677*exp(0,1246*x) r = 0,9169, Y = -340,074748 + 21,0342485*x Fig. 4. Whitefish size-and-weight distribution in Lake Chuna in the 1949 and 2000-2001 catches Table 5.Comparative whitefish size-and-weight indices for older age-groups, according to the literature and own data age, yrs indexes period o f researches 1949-1950 2000-2001 5+ length, cm 25.2 29.6 weight, g 279 271 6+ length, cm 28.4 30.4 weight, g 304 300 7 + length, cm 30.3 32.2 weight, g 358 360 8+ length, cm 31.8 34.2 weight, g 467 407 9+ length, cm weight, g 33.6 525 36.9 607 10+ length, cm weight, g 35.4 768 37.8 640 117