Research Article
Effects of Bahir Dar Textile Factory Effluents on the Water Quality of the Head Waters of Blue Nile River, Ethiopia
Table 2
Number of aquatic macroinvertebrates collected from study sites.
| | Family/order | TV | Sampling sites | | T1 | T2 | U | A | D | Total |
| | Acarina | | | | | | | | | Tetragnathidae | 4 | NA | NA | 4 | 0 | 0 | 4 | | Dipterans | | | | | | | | | Ceratopogonidae | 6 | NA | NA | 0 | 10 | 0 | 10 | | Chironomidae | 8 | NA | NA | 9 | 0 | 0 | 9 | | Culicidae | 8 | NA | NA | 0 | 30 | 0 | 30 | | Ephemeroptera | | | | | | | | | Baetidae | 5 | NA | NA | 48 | 0 | 3 | 51 | | Hemiptera | | | | | | | | | Belostomatidae | 9 | NA | NA | 37 | 43 | 22 | 102 | | Corixidae | 8 | NA | NA | 0 | 35 | 29 | 64 | | Gerridae | 9 | NA | NA | 0 | 68 | 11 | 79 | | Naucoridae | 6 | NA | NA | 21 | 0 | 0 | 21 | | Notonectidae | 9 | NA | NA | 0 | 22 | 5 | 27 | | Veliidae | 7 | NA | NA | 94 | 8 | 1 | 103 | | Snails | | | | | | | | | Hydrobiidae | 8 | NA | NA | 0 | 25 | 8 | 33 | | Lymnaeidae | 6 | NA | NA | 0 | 7 | 0 | 7 | | Physidae | 7 | NA | NA | 0 | 8 | 0 | 8 | | Planorbidae | 7 | NA | NA | 14 | 65 | 17 | 96 | | Odonata (Damsel and Dragon) | | | | | | | | | Aeshnidae | 3 | NA | NA | 5 | 0 | 0 | 5 | | Coenagrionidae | 9 | NA | NA | 9 | 15 | 20 | 44 | | Cordulidae | 3 | NA | NA | 15 | 0 | 0 | 15 | | Lestidae | 9 | NA | NA | 0 | 4 | 0 | 4 | | Libellulidae | 9 | NA | NA | 0 | 3 | 14 | 17 | | Trichoptera | | | | | | | | | Hydropsychidae | 4 | NA | NA | 40 | 0 | 0 | 40 | | Total individuals | | | | 328 | 373 | 134 | 835 | | Total families | | | | 11 | 14 | 9 | 21 |
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TV = tolerance values, NA = not available.
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