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EFFECTS OF TEMPERATURE AND AMMONIA ON CORAL HEALTH STATUS: A CASE STUDY OF DISC CORAL (Turbinaria peltata) |
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| รหัสดีโอไอ | |
| Creator | Bussapakorn Udomsap |
| Title | EFFECTS OF TEMPERATURE AND AMMONIA ON CORAL HEALTH STATUS: A CASE STUDY OF DISC CORAL (Turbinaria peltata) |
| Contributor | Petchporn Chawakitchareon |
| Publisher | TUENGR |
| Publication Year | 2561 |
| Journal Title | International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies |
| Journal Vol. | 9 |
| Journal No. | 1 |
| Page no. | 31-41 |
| Keyword | Seawater temperature, Ammonia concentration, Coral health status, Active polyps, Lethal concentration |
| URL Website | http://tuengr.com |
| Website title | International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies |
| ISSN | 2228-9860 |
| Abstract | This research focused on the effects of temperature and ammonia on the coral health status of disc coral (Turbinaria peltata) by using acute toxicity testing (50% Lethal Concentration: LC50). The acute effects of temperature and ammonia on disc coral were monitored at 24 and 48 hrs. The experiments were carried out in triplicate at temperatures of 30?C and 33?C. The concentrations of ammonia was varied at 0, 0.05, 0.07 and 0.1 mgN/L, respectively. The active polyp percentages of disc coral was analyzed with comparison to the health status percentages. According to the findings at 30?C and at 24 and 48 hrs, and at 33?C and 24 hrs, the acute toxicity of coral bleaching (LC50) could not be investigated. This is because the coral health status was insufficiently low due to decline, or the mortality percentages were not below 50 percent. On the other hand, at 33?C and 48 hrs, the acute toxicity of coral bleaching (LC50) could be evaluated. The experimental results strongly indicate that the mortality percentages exceeded 50 percent. These findings were confirmed by Zooxanthellae density in seawater equaling 109.4 cell/ml. Therefore, the LC50 at 48 hrs in this study was equal 0.075 mg N/L. |
