The contribution of environmental factors to fish assemblages in the Río Acahuapa, a small drainage in Central America Author Álvarez, Francisco S. Departamento de Investigación, UDP Ciencias Neotropicales, Calle Francisco Campos 166, Colonia Escalón, CP 1101, San Salvador, El Salvador samuel_biologo@hotmail.com Author Matamoros, Wilfredo A. Instituto de Ciencias Biológicas, Universidad de Ciencias y Artes de Chiapas, Libramiento Norte Poniente 1150, Colonia Lajas Maciel, CP 29039, Tuxtla Gutiérrez, Chiapas, México wilmatamoros@yahoo.com Author Chicas, Francisco A. Facultad de Ciencias Naturales y Matemática, Escuela de Biología, Universidad de El Salvador, Final Av. Estudiantes Héroes y Mártires del 30 de julio, Ciudad Universitaria, CP 1101, San Salvador, El Salvador francisco.chicas@ues.edu.sv text Neotropical Ichthyology 2017 2017-10-05 15 3 e 170023 1 11 http://dx.doi.org/10.1590/1982-0224-20170023 journal article 10.1590/1982-0224-20170023 1982-0224 20719581
Tab. 3. Results of Principal Components Analysis (PCA), showing the loadings of environmental variables on the first two principal components and the percent of total variance explained by these components. Shaded values in bold represent values with correlation coefficients>0.60 and statistical significance (p> 0.05).
VariablesPC1PC2
T (°C)0.3980.092
pH0.1530.346
DO (mg/L)0.375-0.136
Conductivity (uS)0.0030.052
Width (m)0.418-0.090
Depth (cm)0.2550.151
Salinity (ppt)0.083-0.195
Water velocity (m/s)0.3100.167
Elevation-0.377-0.063
Sands (%)0.203-0.437
Rocks (%)-0.0650.475
Leaves (%)-0.2050.042
Logs (%)-0.1600.449