Table 1. Statistical summary of the environmental characteristics of the riffles.
Environmental variables Mean Minimum Maximum Coefficient of variation (%)
Width (m) 3.60 1.15 5.9 139.28
Length (m) 6.05 3.00 11.5 299.75
Area (m2) 21.08 4.83 53.34 57.43
Depth (cm) 12.11 5.50 16.03 26.63
Flow (m/sec) 1.47 0.97 2.19 391.07
Shading (%) 62.65 17.22 100.00 152.82
Sand (%) 0.15 0.00 2.50 287.68
Rock (%) 12.35 0.00 60.00 94.04
Gravel (%) 0.01 0.00 0.14 87.04
Pebble (%) 27.76 0.01 72.50 282.29
Boulder (%) 26.16 0.23 78.33 20.23
Root (%) 0.01 0.00 0.08 39.88
persistent identifier: http://table.plazi.org/id/79C9663091062026FF5CE7D8FE27FF2A
Published as part of Teresa, Fabrício Barreto, Souza, Luzia Shirlei de, Silva, Dianne Michelle Alves da, Barbosa, Hugo de Oliveira, Lima, Jane Dilvana, Nabout, João Carlos (2016). Environmental constraints structuring fish assemblages in riffles: evidences from a tropical stream. Neotropical Ichthyology (e 150185) 14 (3): 1-6. DOI: 10.1590/1982-0224-20150185, URL: http://dx.doi.org/10.1590/1982-0224-20150185 on page 4