Wetland & Fish Ecology - Enviro Dynamics Namibia

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34 Table 3-3 Fish species reported from the Cuvelai system, iishana, Calueque-Oshakati Canal and Olushandja Dam. Adapted from Van Der Waal (1991), Hay et al.(1999), Skelton (2001) & Ekandjo and Van Der Waal (2008). Fish species Common names Iishana Before 1970 Iishana after Canal canal connection in 1972 from Kunene + Olushandja Dam 1977-88 Kunene River [upper] (Skelton 2001) Iishana survey 2012 Hippopotamyrus ansorgii Slender stonebasher X X Hippopotamyrus discorhynchus Zambezi parrotfish X Marcusenius macrolepidotus Bulldog X X X X Mormyrus lacerda Western bottlenose X X X Pollimyrus castelnaui Dwarf stonebasher X X Petrocephalus catostoma Northern churchill X X X X Kneria maydelli Kunene kneria X Kneria polli Northern kneria X Micralestes acutidens Silver robber X X X X Brycinus lateralis Striped robber X X X Rhabdalestes maunensis Slender robber X X X Draft Environmental Impact Assessment: Oshakati Flood Mitigation Project Specialist Study: Wetland Ecology and Fish Ecology Imputs July 2012
35 Fish species Common names Iishana Before 1970 Iishana after Canal canal connection in 1972 from Kunene + Olushandja Dam 1977-88 Kunene River [upper] (Skelton 2001) Iishana survey 2012 Hepsetus odoe African pike X X Hemichrammocharax machadoi Dwarf citharine X X Hemichrammocharax multifasciatus Multibar citharine X Barbus afrovernayi Spottail barb X Barbus barnardi Blackback barb X X Barbus bifrenatus Hyphen barb X X X Barbus breviceps Shorthead barb X Barbus dorsolineatus Topstripe barb X Barbus fasciolatus Red barb X Barbus eutaenia Orangefin barb X Barbus kerstenii Redspot barb X Draft Environmental Impact Assessment: Oshakati Flood Mitigation Project Specialist Study: Wetland Ecology and Fish Ecology Imputs July 2012
Page 1 and 2: PROPOSED FLOOD MITIGATION MEASURES
Page 3 and 4: ii EXECUTIVE SUMMARY The Cuvelai Ri
Page 5 and 6: iv Decreased surface area of iishan
Page 7 and 8: vi CONTENTS EXECUTIVE SUMMARY .....
Page 9 and 10: viii 4.9 IMPACTS OF REMOVAL OF VEGE
Page 11 and 12: x Figure 4-7 Raised floor of bridge
Page 13 and 14: 1 1 INTRODUCTION 1.1 BACKGROUND: Th
Page 15 and 16: 3 were also still present although
Page 17 and 18: 5 2 LEGAL AND REGULATORY REQUIREMEN
Page 19 and 20: 7 3.1.1 CUVELAI WETLAND SYSTEM: The
Page 21 and 22: 9 Figure 3-1 below is a map of the
Page 23 and 24: 11 In the 1950s and 1960s, a progra
Page 25 and 26: 13 Recommendations to the Departmen
Page 27 and 28: 15 invertebrate fauna by Nakanwe, (
Page 29 and 30: 17 possibly via the Calueque-Oshaka
Page 31 and 32: 19 harvesting fish along the Ondang
Page 33 and 34: 21 from survivors from the last flo
Page 35 and 36: 23 As this underlines the importanc
Page 37 and 38: 25 Discussion with Mr L. Hango, Hyd
Page 39 and 40: 27 A full record of the discussion
Page 41 and 42: 29 Oreochromis macrochir Greenhead
Page 43 and 44: 31 26 June 2012 Site 5 DIKE 10 Oshi
Page 45: 33 Oshanas at end of canal, Dec 198
Page 49 and 50: 37 Fish species Common names Iishan
Page 51 and 52: 39 The following sizes of fish were
Page 53 and 54: 41 4 IMPACT ASSESMENT (OF THE DIKE
Page 55 and 56: 43 Channing and Griffin (1993) and
Page 57 and 58: 45 A) Impact related to dike and it
Page 59 and 60: 47 ISSUE POTENTIAL IMPACT UNMANAGED
Page 61 and 62: 49 blooms as has happened in Gorean
Page 63 and 64: 51 A) Impact related to dike and it
Page 67 and 68: 55 4.4 IMPACTS OF ALTERED FLOWS (VE
Page 69 and 70: 57 Figure 4-3 Inakulo Yomadhiya Gra
Page 71 and 72: 59 High fishing pressure can be exp
Page 77 and 78: 65 During low floods, especially af
Page 81 and 82: 69 Okatana channel of marginal vege
Page 83 and 84: 71 4.6 IMPACTS ON FROGS (PARTICULAR
Page 87 and 88: 75 4.7.2 IMPACT OF DEEPENING AND LI
Page 91 and 92: 79 4.8 IMPACTS OF FLOODGATE OPERATI
Page 95 and 96: 83 4.9 IMPACTS OF REMOVAL OF VEGETA
Page 97 and 98:
85 Although only one study on the e
Page 99 and 100:
87 ISSUE POTENTIAL IMPACT UNMANAGED
Page 101 and 102:
89 4.10 IMPACTS OF DEEPENING THE CH
Page 103 and 104:
91 ISSUE POTENTIAL IMPACT UNMANAGED
Page 105 and 106:
93 4.11 HEALTH IMPACTS/SPREAD OF BI
Page 107 and 108:
95 POTENTIAL IMPACT UNMANAGED MANAG
Page 109 and 110:
97 4.12 COMMENT ON POTENTIAL FOR FI
Page 111 and 112:
99 This includes following the natu
Page 113 and 114:
101 5 CONCLUSIONS AND RECOMMENDATIO
Page 115 and 116:
103 6 REFERENCES Berry, H.H. (1972)
Page 117 and 118:
105 Geiss, W. (1971). A preliminary
Page 119 and 120:
107 Van der Waal, B.C.W. (2000a). F
Page 121 and 122:
109 Mr Shakelia responded that the
Page 123 and 124:
111 his earlier studies to see whic
Page 125 and 126:
113 Amaranthaceae Nymphaeceae Vahli
Page 127 and 128:
115 Poaceae Poaceae Poaceae Poaceae
Page 129 and 130:
117 Cypercaeae Cypercaeae Cypercaea
Page 131 and 132:
119 Class: Branchiopoda Order: Anos
Page 133 and 134:
121 Sars 1909 Macrothrix spinosa 18
Page 135 and 136:
123 7 1 0 Osprey Pandion haliactus
Page 137 and 138:
125 APPENDIX 3: Field Notes FIELD N
Page 139 and 140:
127 Do not foresee any impacts of w
Page 141 and 142:
129 B) FISH SURVEY RESULTS - ACTUAL
Page 143 and 144:
131 Site 4 Dike 3 Tuesday 25 June T
Page 145 and 146:
133 Site 7 Thursday 28 June - Deep
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Wetland & Fish Ecology - Enviro Dynamics Namibia

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