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The changes in the hatchability & survival of Egg & Larvae of sheep nematode after exposure to Ultraviolet radiation | ||
| journal of kerbala university | ||
| Article 1, Volume 4, Issue 2, 2008, Pages 260-264 PDF (0 K) | ||
| Authors | ||
| Karrar Mohamed Abdul-Sada; Sundus Nsaif Abd Al-Hucheimi | ||
| Abstract | ||
| The effect of ultraviolet (UV) radiation on the hatchability & the activity (survival) of sheep gastrointestinal nematode;Haemonchus contortus, trichostrongylus colubriformis , Oesophagostomum columbianum and Strongyloides papillosus eggs & Larvae were examined. The hatchability decreased with increasing exposure to radiation. The difference in hatchability of eggs irradiated for 15.30 & 60 minutes were highly significant (P< 0.01 dα = 3.08,3.25 and 3.76 respectively) compared with the hatchability of the non-irradiated eggs. The life span of irradiated was shortened , only (19%) of those expose to UV radiation 60 minutes survive for 2 days as against (100%) survival rate in the non-irradiated larvae . Batches of nematode larvae (L1) were irradiated with ultraviolet light for varying time interval to determine the influence of radiation on the transmission potential of the irradiated larvae. There was a decreased in the survival rate of the hatched free-swimming larvae that corresponded with the increasing radiation exposure time . | ||
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