Open AccessMorphometric characteristics of crayfish,Cherax gherardiae, from Maybrat, West Papua, Indonesia
Author(s) -
Yulianus Sedik,
Dominggus Rumahlatu,
Bambang Irawan,
Agoes Soegianto
Publication year - 2018
Publication title -
fisheries and aquatic life
Language(s) - English
Resource type - Journals
eISSN - 2545-059X
pISSN - 2545-0255
DOI - 10.2478/aopf-2018-0025
Subject(s) - carapace , crayfish , biology , sexual dimorphism , allometry , decapoda , zoology , ecology , crustacean
The objectives of this study were to determine the length-weight relationships (LWRs), chelae length (ChL)-width (ChW) relationships, carapace length (CL)-width (CW) relationships, sexual dimorphism, and condition factor (K) of Cherax gherardiae from Maybrat, West Papua Indonesia. The sex ratio of C. gherardiae was found to be 1.04:1. The LWRs for males, females, and all individuals were W = 0.225L 1.96 , W = 0.181L 2.02 , and W = 0.187L 2.03 , respectively. Males and females exhibited negative allometric growth (b<3). There was no significant difference in lengths between males and females; however, the weight of males was greater than that of females. The K values for males, females, and all individuals were 3.17, 3.09, and 3.13, respectively. The ChL of the crayfish ranged from 1.0 to 7.5 cm, and the ChW ranged from 0.4 to 2.5 cm. The CL of crayfish ranged from 1.6 to 6.0 cm, and the CW ranged from 0.6 to 4.1 cm. Males had longer chelae and carapaces than did females. There was no significant difference in chelae width or carapace width between males and females. The ChL-ChW relationships for males, females, and all individuals were ChW = 0.312ChL + 0.260, ChW = 0.397ChL - 0.050, and ChW = 0.345ChL + 0.119, respectively. The CL-CW relationships for males, females, and all individuals were CW = 0.750CL-0.955, CW = 0.526CL - 0.178, and CW = 0.635CL-0.543, respectively.