Length-weight and chelae length-width relationships of the crayfish Procambarus clarkii under culture conditions

摘要

Length-weight (body length; L _B versus wet weight; W _WT) and chelae length-width (L _Ch versus W _Ch) relationships were determined for male and female crayfish (Procambarus clarkii) under culture conditions. The length-weight relationships for males, females, and total individuals were described as W _WT = 0.014 × , W _WT = 0.020 × , and W _WT = 0.017 × , respectively. This relationship was significantly different (p  0.001) between males and females. Compared to females, males were heavier and their tail length was shorter (p  0.001). No statistical difference was observed in mean L _Ch, cheliped length (L _Cp), and W _Ch between the right and left sides within a gender (p  0.05), but significant differences were detected between males and females (p  0.001). The regressions for L _Ch versus W _Ch for males and females were W _Ch = 3.083 ×  and W _Ch = 0.284 × , respectively. This regression differed significantly between males and females; males’ chelae were wider than those of females (p  0.001). L _Ch, L _Cp, and W _Ch were highly related to L _B; males had longer L _Ch and L _Cp and wider W _Ch than females. Individuals without chelipeds were measured to determine the relationship between the length and body weight (W _BW). The L _B-W _BW relationships for males and females were described as W _BW = 0.074 ×  and W _BW = 0.033 ×  respectively. Females exhibited positive allometric growth (b  3), and males showed negative allometric growth (b  3). No statistical difference was observed in mean W _BW between males and females when L _B was used as a covariate (p  0.05).View full textDownload full textKeywordslength, weight, chelae length-width, crayfish, Procambarus clarkii Related var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/02705060.2011.564380