|
Document Type |
: |
Thesis |
|
Document Title |
: |
TOLERANCE OF GAMBUSIA AFFINIS TO ACUTE AMMONIA AND NITRITE EXPOSURE AT VARIOUS SALINITIES قدرة اسماك الجامبوزيا أفينس على تحمل الأمونيا الحادة والنيتريت عند تعرضه للملوحة المختلفة |
|
Subject |
: |
Faculty of Marine Sciences - Marine Biology |
|
Document Language |
: |
Arabic |
|
Abstract |
: |
Tolerance of Mosquito fish, Gambusia affinis to acute ammonia and nitrite exposure at various salinities was conducted in fibreglass tanks (500 liters) for a period of 4 months at KAU Fish Farm, Faculty of Marine Sciences, Obhur. Salinity tolerance of fish was tested in 0 (Control) 10, 20, 30 and 40 ppt. Once the fishes were tolerated to 0, 10, 20, 30 and 40 ppt salinity, 60 fish from each salinity was taken for ammonia and nitrite exposure study. Ammonia toxicity was tested at 0, 0.5, 1, 2, 3 and 4ppm while nitrite toxicity was tested at 8, 10, 12, 14 and 16 ppm. Reduction in survival was observed when salinity was increased from 0 to 40 ppt and a significant relationship (R2=0.959) was found between salinity and survival. Mortality rate was found increased when ammonia dosage and salinity level increases and the highest mortality was observed in the highest dosage of ammonia (4ppm) and salinity (40ppt). Similarly increased mortality rate was also observed in higher levels of nitrite and salinity levels. Results show that Gambusia affinis can tolerate salinity up to 40 ppt and ammonia and nitrite toxicity at lower levels. |
|
Supervisor |
: |
Dr. Samy Albdulaziz Abdulhameed Rahim Al-Deen |
|
Thesis Type |
: |
Master Thesis |
|
Publishing Year |
: |
1434 AH
2013 AD |
|
Added Date |
: |
Monday, March 18, 2013 |
|
Researchers
| عماد علي العدواني | Al-Edwani, Emad Ali | Researcher | Master | |
|