Development of brown trout (Salmo trutta) after hatching: comparative analysis of parents influence, originating from the natural and artificial living environment

Early development of brown trout (Salmo trutta L.) in the period after hatching was analysed. Three different series (A, B, C) of eleuterembryos, larvae and juveniles were compared by means of selected morphometry parameters (total length, fork length, standard length, head length, body depth, yolk sac length, height and depth, body height, mouth width and mouth diameter). Development of fry originating from parents from natural environment (line A) and from artificial environment (line B) was standard without significant differences. Growth rate of fry in line C (female from artificial environment and male from natural conditions) was slower in the period with exogenous nutrition. Combination C showed from a stand point of ours results as a little acceptable for production of fish stock