| Summary: | The stone crayfish Austropotamobius torrentium (Schrank, 1803) is a
native crayfish species in the Czech Republic. Biometric analysis of this crayfish species
in the Czech Republic has not been performed up to now. The aim of this paper is to
provide these data. The maximum observed body length was 94.8 mm in females and 103.6 mm
in males. As the main characters of sexual dimorphism were observed, males had the
carapace and chelae relatively longer in relation to the total body length and the
carapace length respectively, while females showed longer rostro-cervical part of the
carapace and wider abdomen. The chelae width/length ratio was larger in females; the
chelae width/length ratios and abdomen width differed between sexes in both adults and
juveniles. Most of observed body parts grow allometrically. The positive allometry was
found in the following length relations: the carapace length in males only, carapace
width, and abdomen width (all related to the carapace length) in females, and chelae
width/length ratio in females. Negative allometric growth was recorded in the length of
the rostro-cervical part of the carapace, chelae width, and chelae height in males.
|
|---|