Use of pleopod morphology to determine sexual dimorphism and maturity in hermit crabs: Isocheles sawayai as a model

Table 2 Isocheles sawayai: regression equations for each sex

Relationship	N	Sex	Power function y = ax ^b	Linear equation lny = lna + blnx	r	A	b ≠ 1
SL × SW	307	M	SW = 1.220SL^0.924	lnSW = 0.199 + 0.924lnSL	0.951	−	4.42*
SL × SW	67	F	SW = 1.2587SL^0.900	lnSW = 0.230 + 0.900lnSL	0.928	−	2.23*
SL × CPL	306	M	CPL = 1.286SL^0.985	lnCPL = 0.252 + 0.985lnSL	0.935	=	0.701
SL × CPL	66	F	CPL = 2.234SL^0.617	lnCPL = 0.804 + 0.617lnSL	0.760	−	5.08*
SL × CPW	306	M	CPW = 1.022SL^0.898	lnCPW = 0.0219 + 0.898lnSL	0.881	−	3.70*
SL × CPW	66	F	CPW = 1.414SL^0.687	lnCPW = 0.347 + 0.687lnSL	0.749	−	4.12*
SL × WW	307	M	WW = 0.007SL^3.148	lnWW = −4.971 + 3.148lnSL	0.946	+	2.39^a
SL × WW	67	F	WW = 0.016SL^2.547	lnWW = −4.123 + 2.547lnSL	0.864	−	2.46^a
SL × PPL	305	M	PPL = 0.165SL^1.163	lnPPL = −1.801 + 1.163lnSL	0.731	+	2.62*
SL × PPL	66	F	PPL = 0.072SL^1.863	lnPPL = −2.626 + 1.863lnSL	0.801	+	4.96*
SL × EPL	305	M	EPL = 0.410SL^1.314	lnEPL = −0.891 + 1.314lnSL	0.903	+	8.72*
SL × EPL	66	F	EPL = 0.289SL^1.623	lnEPL = −1.242 + 1.623lnSL	0.845	+	4.83*
SL × XPL	266	M	XPL = 0.0456SL^1.412	lnXPL = −3.139 + 1.438lnSL	0.623	+	3.95*
SL × XPL	66	F	XPL = 0.151SL^1.693	lnXPL = −1.891 + 1.693lnSL	0.807	+	4.47*

M males, F females, SL cephalothoracic shield length (mm), SW cephalothoracic shield width (mm), CPL left cheliped propodus length (mm), CPW left cheliped propodus width (mm), WW hermit crab wet weight (g), PPL second pleopod protopod length (mm), EPL second pleopod endopod length (mm), XPL second pleopod exopod length (mm), N number of individuals, r correlation coefficient, A allometry
* Significant correlation, P < 0.05
^a b ≠ 3

ISSN: 1438-3888