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Publication
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| Research Title |
Effect of glyphosate on mortality and life history of Brachionus quadridentatus Hermann, 1783 (Rotifera) |
| Date of Distribution |
27 November 2020 |
| Conference |
| Title of the Conference |
The 5th TICC International Conference 2020 in Multidisciplinary Research Towards a Sustainable Society |
| Organiser |
Thailand International College Consortium |
| Conference Place |
โรงแรมพูลแมน ขอนแก่น ราชา ออคิด |
| Province/State |
ขอนแก่น |
| Conference Date |
26 November 2020 |
| To |
27 November 2020 |
| Proceeding Paper |
| Volume |
- |
| Issue |
- |
| Page |
31 |
| Editors/edition/publisher |
Khon Kaen University International College |
| Abstract |
Glyphosate is a commonly used herbicide in agricultural areas, and contamination of this toxicant in water might affect aquatic organisms living in freshwater habitats. In this study, Brachionus quadridentatus was chosen as a test organism to assess acute and chronic toxicity of glyphosate. In each of ten replicates, ten neonates were tested with six concentrations of glyphosate (0 (control), 10, 20, 30, 40 and 50 mg/L) for an acute toxicity test. In addition, neonates were individually cultured in six concentrations (0 (control), 2, 4, 6, 8 and 10 mg/L) of toxicant solution for a chronic toxicity study. The 24-h median lethal concentration (LC50) of glyphosate was 37.8 mg/L. At 6, 8, 10 mg/L, amictic females showed significantly shorter reproductive period than control whereas their post-reproductive period was longer. Rotifers exposed to 8 and 10 mg/L produced significantly fewer amictic daughters (12.67±4.15 ind./female and 5.50±2.22 ind./female, respectively). At these concentrations, maternal females had longer pre-reproductive period (3.48±0.91 days and 3.48±1.31 days, respectively) and exhibited shorter life span (9.89±2.47 days and 9.33±1.19 days, respectively), compared to control. Rotifers did not produce male offspring at 0 and 10 mg/L, while maternal rotifers at 2, 4, 6 and 8 mg/L produced male offspring with 10.50±3.54, 11.00, 7.00 and 14.00 ind./female, respectively. This results indicated that glyphosate could affect life history parameters of rotifer including pre-reproductive period, reproductive period, post-reproductive period, life span and fecundity. Moreover, this herbicide also disturbed life cycle of rotifers by switching from asexual to sexual reproduction. |
| Author |
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| Peer Review Status |
มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Abstract |
| Type of Presentation |
Poster |
| Part of thesis |
true |
| Presentation awarding |
false |
| Attach file |
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| Citation |
0
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Journal Publication
ไทย