[Free amino acids and reducing sugars in the freshwater shrimp Gammarus lacustris (Crustacea, Amphipoda) at the initial stage of preparation to winter season].

A peculiarity of amino acid profile of the cold-resistant freshwater shrimp Gammarus lacustris in the beginning of autumn is a high level of ornithine, the second after alanine (17.0 +/- 1.4 and 22.6 +/- 1.4 micromol/ml of homogenate, respectively). The amount of alanine and ornithine accounts for 39.8% of the total pool of free amino acids and together with lysine and leucine - 55%. Free glucose is the major reducing sugar (6.42 +/- 0.78 micromol/ml).