Table 2 Species recorded in the main channel of Lake Nasser during this study.
Species recorded Up-Stream Dahmit Kalabsha Wadi-Abyad El-Madiq Korosko Amada Tushka Abu-Simble Adindan Average
Annelida 55 86 127.5 144 36 486 297 754 323 144 2452
Limnodrilus udekemianus 45 36 9 99 24 279 117 371 165 84 1229
Limnodrilus hoffmeisteri 5 32 93 31 12 108 108 219 95 60 763
Branchiura sowerbyi 5 18 16 0 0 60 33 52 54 0 238
Pristina sp. 0 0 3 13 0 39 39 80 9 0 183
Helobdella conifera 0 0 6 0 0 0 0 33 0 0 39
Mollusca 109 41 175 9 49 165 114 117 93 72 943
Valvata nilotica 72 23 114 9 49 102 111 107 57 24 667
Melanoides tuberculata 4 0 24 0 0 9 3 0 18 36 94
Cleopatra bulimoides 0 14 0 0 0 0 0 0 0 12 26
Bulinus truncatus 23 0 13 0 0 0 0 0 18 0 54
Physa acuta 0 0 11 0 0 0 0 0 0 0 11
Gyraulus ehrenbergi 9 0 9 0 0 0 0 0 0 0 18
Corbicula consobrina 0 4 5 0 0 0 0 0 0 0 9
Spharium simile 0 0 0 0 0 15 0 0 0 0 15
Pisidium pirothi 0 0 0 0 0 39 0 11 0 0 50
Arthropoda 32 4 3 50 42 216 358 261 150 384 1500
Chlamidothica unispinosa 0 5 0 0 0 0 18 25 27 0 75
Pupa of Chironomidae 0 0 0 14 0 30 21 0 0 0 65
Chironomus sp. 14 0 0 18 30 75 229 93 44 132 635
Polypedilum sp. 14 0 0 18 0 3 18 60 3 132 248
Tanytarsus sp. 5 0 3 0 0 72 51 76 36 72 315
Cryptochironomus spp. 0 0 0 0 0 36 9 3 0 36 84
Perithemis sp. 0 0 0 0 12 0 6 3 9 12 42
Ischnura sp. 0 0 0 0 0 0 6 0 13 0 19
Trichoptera larvae 0 0 0 0 0 0 0 0 9 0 9
Hydrovatus sp. 0 0 0 0 0 0 0 0 9 0 9
Total number of individuals 194 131 306 203 127 867 769 1132 566 600 4895