Sandimirov S.S. Catalogue of lakes in the Russian, Finnish and Norwegian Border Area. Finland, Jyvaskyla: Kopijyva Oy, 2008.

Fig. 15. Size and weight dis­ tribution of the sparsely rakered whitefish in Lake Kochejaur. Fig. 17. Size and weight distribu­ tion ofperch in Lake Kochejaur. and the irregular age distribution of the fish. The sex distribution of the fish is regular, with a slight predominance of females. Some individuals in this lake become mature at the age of 3. The weight and size of fish spawning for the first time do not exceed 71 g and 19.2 cm, respectively. 47% 43% 40% 37% 33% 30% 27% 23% 20 % 17% 13%10% 7% 3% 0% 400 800 1200 1600 200 600 1000 1400 Weight, g 280 260 240 220 200 180 160 140 120 100 80 60 40 20 0 39% 240 36% 220 33% 200 30% 180 > 26% 160 3 о 23% 1 V 140 с Э 20% 120 16% л 100 13% ш \ 80 10% 1'Y" 60 7% I \ 40 3% 0% Г . i .....1. 1 . 20 0 10 15 20 25 30 35 40 45 50 55 60 65 Length AC, cm > 3 о > 3 Fig. 16. Age distribution of the sparsely rakered whitefish in Lake Kochejaur. The size of some specimens of trout reaches 37.5 cm, with a weight of 617 g. The mean size and weight of pike do not exceed 42.4 cm and 591 g, respectively. Fish of age 5-7 years are the most abundant. The mean size of perch inhabiting the lake is 37.5 cm, and the mean weight 276 g. However, fish can weigh over one kilogram (1380 g) and have a length of 43.3 cm.The bulk of the population consists of fish weighing less than 200 g with a length of 25- 30 cm (Fig. 17). The age limit of perch in the lake is 14 years, but the fish of age class 5-6 years constitute the bulk of the population. 400 800 1200 1600 200 600 1000 1400 Weight, g > 3 о 5 10 15 20 25 30 35 40 45 50 Length, cm > 3 о 52 Catalogue o f Lakes in the Russian, Finnish and Norwegian BorderArea