A STUDY ON SOME MORPHOLOGICAL CHARACTERISTICS OF ASTACUS LEPTODACTYLUS (ESCHSCHOLTZ 1823) IN SEVEN DIFFERENT INLAND WATERS IN TURKEY

A study on some morphological characteristics of Astacus leptodactylus (Eschscholtz 1823) in seven different inland waters in Turkey

Tomris Deniz (Bök), Hamdi Aydın, Celal Ateş

Faculty of Fisheries, Istanbul University, Ordu St., No. 200, 34470, Laleli, Istanbul, TURKEY
Kocaeli University, Gazanfer Bilge Vocational School, 41500 Karamürsel, Kocaeli, TURKEY
Faculty of Fisheries, Muğla Sıtkı Koçman University, 48000 Kötekli, Muğla, TURKEY

Abstract

This study aimed to determine some morphological characteristics of freshwater crayfish (Astacus leptodactylus Eschscholtz 1823) populations in various water resources in Turkey. We present the relationships between total length (TL), carapace length (CL), chelae length (ChL), abdomen length (AL) and total weight (W) for Astacus leptodactylus from three lakes, three dam lakes and an irrigation lake. The values of the exponent b of the length˗weight relationships ranged from 1.0760 to 3.6939 and intercepts from 1.0760 to 3.6939 for combined data. The r2 values ranged from 0.6599 to 0.9561 and relationships were estimated highly significant (P<0.05). Differences in slopes of regression lines between sexes as well as among locations were not significant, tested by ANCOVA.

Keywords: Crayfish, morphometric characteristics, length˗weight relationship, allometric growth

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