Table 6. Principal component analysis of the FBHs characterizing factors

Components	Factor 1	Factor 2	Factor 3	Factor 4
Secchi-depth	–0.934
Chl-a	0.933
TSS	0.910
Turb	0.908
EC	0.678
pH		0.868
Temp		0.624
Mature gonads			0.899
DO				–0.891
Vegetation				0.465
Eigen values	3.922	1.749	1.465	1.117
Cumulative %	82.521

FBHs, fish breeding habitats; Chl-a, chlorophyll-a; TSS, total suspended solids; Turb, turbidity; EC, electrical conductivity; pH, potential hydrogen; Temp, temperature; DO, dissolved oxygen.