Table 3. Results of the stepwise regression and partial correlation coefficient (R) evaluating the relationships of the abundances of the five predominant euphausiid species and environmental variables in waters around Taiwan in winter and summer 2004 are evaluated.

Species	R for T	R fo S	R for C	Predictive equation
Pseudeuphausia lalifrons (PL)	0.305*	0.005	0.175	PL = 6.176T
Stylocheiron sp. (Ss)	0.377*	-0.029	0.148	Ss = 2.758T
Stylocheiron suhmii (SS)	0.622***	-0.273*	0.239	SS = 3.661T-12.63S
Euphausia pacifica (EP)	-0.478***	-0.573***	0.033	EP = -4.418T-41.64S + 1549.01
Stylocheiron carinatum (SC)	0.169	0.144	0.550***	SC = 137.17Chl a
Total Euphausiacea (TT)	0.455**	-0.249	0.324*	TE = 19.75T + 732.10 Chl a
Species richness (SN)	0.435**	0.007	-0.254*	SN = 0.50T - 15.28Chl a
Species diversity (SD)	0.306*	0.259*	-0.217	SD = 0.04T + 0.27S-8.16

*p ＜ 0.05, **p ＜ 0.01, ***p ＜ 0.001; ns, not significant; T, temperature; S, salinity; C, chlorophyll a