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Behaviour of crayfish juveniles during early stages of ontogenesis
Cukerzis JM 
Published Online: 1/21/2020
Abstract
Between 1979 and 1981 more than 1,500 observations were made on the behaviour of juvenile crayfish. Two native species, Astacus astacus L. and A. leptodactylus Esch. and the introduced species Pacifastacus leniusculus Dana were included in the study. Quantitative data on the output and sequence of locomotory and chelae movements are presented in six schemes and the data concerning invariability of these movements are presented in two tables. The data were obtained by means of matrices. These invariable, stereotyped and strictly fixed movements are innate and determine the early behaviour. In fact, their behaviour as a whole can be regarded as innate during early stages of ethogenesis.
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Cukerzis JM. (1986). Behaviour of crayfish juveniles during early stages of ontogenesis. Freshwater Crayfish 6(1):75-86. doi: 10.5869/fc.1986.v6.075
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