Risk factors   No. of fishes examined No. of fish with parasites (%) Parasites Burden (%) χ2(P-value)
Species Oreochromis niloticus 225 113 (50.22) 324(61.95%) 103.686 (0.000)
  Clarias gariepinus 72 66 (91.7) 172(32.9%)  
  Cyprinus carpio 115 18 (15.6 ) 27 (5.15 %)  
Total   412 197 (47.8) 523 (100 %)  
Sex Female 178 86 (48.31) 350(66.92%) 0.031 (0.860)
  Male 234 111 (47.44) 173(33.08%)  
Total   412 197 (47.8) 523 (100%)  
Length 8 – 12 cm 127 66 (51.97) 194 (37.1%) 38.546 (0.000)
  13 – 17 cm 96 45 (46.9) 121(23.13%)  
  18 – 24 cm 43 2 (4.6) 9 (1.73 %)  
  ≥ 25 cm 146 84 (57.53) 199 (38.04%)  
Total   412 197 (47.8) 523 (100 %)  
Weight (age) 70 – 100 gm (fingerlings) 194 88 (45.36) 240 (45.9%) 11.434 (0.010)
  110 – 200 gm (juvenile) 72 43 (59.72) 125 (23.9%)  
  210 – 300 gm (young) 61 20 (32.78) 54 (10.3%)  
  ≥ 300 gm (adult) 85 46 (54.11) 104 (19.9%)  
Total   412 197 (47.8) 523 (100 %)  
Table 1: Prevalence of internal parasitic helminthes in relation to species, sex, length and weight (ages) of fish in Lake Lugo (Hayke).
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