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Table 1.

Principal component analysis table with loading values for pertinent variables and retinal locations

UVS densitySWS densityDouble densityDouble diameterDistance doubleDistance SWS
PC1       
    Central ventral -0.027 0.175 0.169 -0.201 -0.209 -0.215 
    Dorsal 0.228 0.238 0.235 -0.164 -0.189 -0.214 
    Nasal 0.014 0.171 0.179 -0.108 -0.194 -0.185 
    Temporal 0.167 0.215 0.213 -0.163 -0.183 -0.198 
    Ventral 0.074 0.184 0.162 -0.188 -0.186 -0.199 
       
PC2       
    Central ventral 0.072 0.182 0.178 -0.002 0.031 0.106 
    Dorsal 0.050 0.001 -0.017 0.236 0.0777 0.095 
    Nasal 0.177 -0.279 -0.272 0.356 0.280 0.304 
    Temporal -0.127 0.176 0.201 0.016 -0.111 -0.149 
    Ventral 0.230 0.253 0.305 -0.085 -0.096 -0.121 
UVS densitySWS densityDouble densityDouble diameterDistance doubleDistance SWS
PC1       
    Central ventral -0.027 0.175 0.169 -0.201 -0.209 -0.215 
    Dorsal 0.228 0.238 0.235 -0.164 -0.189 -0.214 
    Nasal 0.014 0.171 0.179 -0.108 -0.194 -0.185 
    Temporal 0.167 0.215 0.213 -0.163 -0.183 -0.198 
    Ventral 0.074 0.184 0.162 -0.188 -0.186 -0.199 
       
PC2       
    Central ventral 0.072 0.182 0.178 -0.002 0.031 0.106 
    Dorsal 0.050 0.001 -0.017 0.236 0.0777 0.095 
    Nasal 0.177 -0.279 -0.272 0.356 0.280 0.304 
    Temporal -0.127 0.176 0.201 0.016 -0.111 -0.149 
    Ventral 0.230 0.253 0.305 -0.085 -0.096 -0.121 

Note that only the first two principal components were used in our analysis as they account for most of the variance in the original data. UVS,ultraviolet-sensitive; SWS, blue (short-wavelength)-sensitive

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