The toxic effects of pesticides dimethoate and profenofos on nile tilapia fry (Oreochromis niloticus) and water flea (Moina macrocopa) | |
| Author | Souvanny Phommakone |
| Call Number | AIT Thesis no.AQ-04-25 |
| Subject(s) | Nile tilapia--Effect of pesticides on Cladocera--Effect of pesticides on |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-04-25 |
| Abstract | Acute toxicity test of dimethoate and profenofos were carried out on Nile tilapia (Oreochromis niloticus) yolk sac fry and first feeding fry, and water flea (Moina macrocopa) using static bioassay at different concentration under laboratory conditions. The LC50 at 24, 48, 72 and 96 hours exposure of Nile tilapia yolk sac fry to dimethoate were 340, 12.6 , 330,77.8, 308,74.3 and 292,83μg/L. The LC 50 at 24, 48, 72 and 96 hours exposure of tilapia yolk sac fry to profenofos were 2, I 06.9 μg/L-1 ., 872.4μg/L- 1 ., 657.4μg/L- 1 and 424.1 μg/L- 1 • The LC50 at 24, 48, 72 and 96 hours exposure of tilapia first feeding fry to dimethoate were 35,729.4μg/L- 1 , 32,511. μg/L-1 , 28,245.1 μg/L-1 and 24,767.4μg/L- 1 .The LC 50 at 24, 48, 72 and 96 hours exposure of tilapia first feeding fry to profenofos were 384.7μg/L-1 , 352.1 μg/L-1 , 312.8μg/L-1 and 309.7μg/L-1 • The LC50 at 24, 48, 72 and 96 hours exposure of Moina to dimethoate were 1.9 μg/L- 1 , 1.4 μg/L- 1 , 0.5 μg/L" 1 and 0.3 μg/L- 1 • The LC50 at 24, 48, 72 and 96 hours exposure of Moina to profenofos were 2.3 μg/L-\ 1.7μg/L- 1 , 1.7 μg/L-1 and 1.3 μg/L- 1 In- situ testing was performed in three vegetable farms in Nakhonchaisri district, Nakhonpathom province and Rangsit farm (an organic farm). The results showed that the feeding rate of the control Moina (without any pesticide) was significantly (P<0.05) higher than the feeding rates of Moina inside and outside the farm canals in all the farms using pesticide. The feeding rate of Moina in canals of Rangsit farm was significantly (p<0.05) higher than the feeding rates of Moina in the other 3 farms whose inside canals receive pesticides applied on vegetable plots. Yolk sac absorption of tilapia yolk sac fry was not successful because the result of each farm was showed negative. Therefore no data for yolk sac absorption of tilapia yolk sac fry. |
| Year | 2004 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-04-25 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Aquaculture and Aquatic Resources Management (AQ) |
| Chairperson(s) | Amararatne Yakupitiyage; |
| Examination Committee(s) | Yang Yi;Ikejima, Kou; |
| Scholarship Donor(s) | NARIP-LARReC, Lao P.D.R; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2004 |