3.4. Gonad
Table 2 shows an increase in the glycogen reserves of the
gonad tissue during spring and autumn. A significant difference
was observed only in autumn, with an increase of 4.7 times,
approximately, over the preceding season (summer); these
levels decreased in winter, about 16.4 times. The concentration
of total proteins was high in winter and summer. The glycogen
level decreased by 2.5 times ( pb0.05) from winter to spring,
increased 2.4 times in summer, and decreased in autumn by 3.6
times ( pb0.05).
During spring and summer, the lipid level in gonad tissue
increased, but not significantly ( pN0.05). Total cholesterol was
high in spring, about 2.4 times higher than in the preceding
season (winter), with lower levels in autumn (19.3 times lower)
(Table 2).