Effects of chicken manure to fingerlings of Nile tilapia (Oreochromis niloticus)
The effect of acute toxicity of chicken droppings to fingerlings of Oreochromis niloticus was determined under laboratory conditions using static bioassay for a period of 96 hours. The 96-hrs LC50 was estimated to be 2.19 with upper and lower confident limits of 3.24 and 1.48g/l. Water quality examination revealed a reduction in the level of dissolved oxygen, increase in alkalinity and free carbon dioxide with increase in concentrations of the fertilizer while there were no significant different (P>0.05) in the ievels of pH and temperature when compared with the control. Fish exposed to higher concentrations of the organic fertilizer became darker in colour with mucous secretion, exhibited erratic swimming and showed signs of respiratory distress before death. Methods and standard doses for subsequent organic fertilizer application in fish ponds for survival and growth are discussed.
| Main Authors: | , , , |
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| Format: | conference_item biblioteca |
| Language: | English |
| Published: |
FISON
2012
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| Subjects: | Pollution, Aquaculture, Oreochromis niloticus, Nigeria, Abuja, Organic fertilizer, Acute toxicity, Water quality, freshwater environment, Manure, Organic fertilizers, Fingerlings, Freshwater fish, Toxicity, Inspection, Dissolved oxygen, Alkalinity, Carbon dioxide, Fish ponds, Survival, Growth, Pollution effects, Bioassays, Controlled conditions, Lethal limits, Fish culture, |
| Online Access: | http://hdl.handle.net/1834/38900 |
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