Table 4 Loadings of morphological measurements on the first three principal components. Variables in bold indicate higher loading values

Standard length

0.209

-0.166

0.076

Body depth

0.262

0.276

0.019

Head length

0.182

0.051

0.051

Head depth at nape

0.210

0.189

-0.024

Head depth at eye

0.199

0.138

-0.081

Caudal-peduncle length

0.252

-0.509

-0.029

Caudal-peduncle depth

0.214

-0.115

0.047

Caudal-peduncle width

0.225

-0.073

-0.923

Dorsal-fin length

0.224

0.282

0.017

Pectoral-fin length

0.199

0.174

0.011

Pelvic-fin length

0.194

0.125

-0.008

Anal-fin length

0.211

0.278

-0.006

Upper caudal-lobe length

0.185

0.195

0.082

Predorsal length

0.205

-0.138

0.081

Prepectoral length

0.178

0.009

0.082

Prepelvic length

0.212

-0.057

0.103

Preanal length

0.205

-0.091

0.093

Vent to anal-fin origin

0.212

-0.450

0.197

Pelvic-fin insertion to anal-fin origin

0.208

-0.165

0.062

Snout length

0.169

0.046

0.066

Postorbital head length

0.187

-0.015

0.063

Eye diameter

0.191

0.073

0.052

Interorbital width

0.156

0.190

0.181

Median caudal-ray length

0.178

-0.128

-0.058

Cumulative variance (%)

81.575

8.311

3.887