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Effects of water salinity on hatching of egg, growth and survival oflarvae and fingerlings of snake head fish, Channa striatus |
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| รหัสดีโอไอ | |
| Creator | 1. Thumronk Amornsakun 2. Vuong Hung Vo 3. Nirattisai Petchsupa 4. Tan Min Pau 5. Anuar bin Hassan |
| Title | Effects of water salinity on hatching of egg, growth and survival oflarvae and fingerlings of snake head fish, Channa striatus |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2560 |
| Journal Title | Songklanakarin Journal of Science and Technology (SJST) |
| Journal Vol. | 39 |
| Journal No. | 2 |
| Page no. | 137 |
| Keyword | fertilization rate,hatching rate,hatching out,water salinity tolerance,snake head fish,Channa striatus |
| ISSN | 0125-3395 |
| Abstract | A study on the effect of water salinity ranging from 0-30 ppt on hatching success of snake head fish, Channa striatuswas conducted in a 15-liter glass aquarium (water volume 10 liters) containing 500 eggs for various levels of water salinity.Fertilization rates at 0, 5, 10, 11, 12, 13 and 14 ppt were 69.33, 72.67, 71.33, 72.67, 82.00, 73.33 and 10.67%, respectively. Thefertilization rate at 12-13 ppt salinity was significantly (P<0.05) higher than that at 0, 5, 10 and 11 ppt salinity. Hatching rateat 0, 5, 10, 11, 12, 13 and 14 ppt salinity were 60.00, 60.67, 66.67, 72.00, 77.33, 68.00 and 2.67%, respectively. Hatching rate at12 ppt salinity was significantly (P<0.05) higher than that at 0, 5, 10, 11 and 13 ppt salinity. For the snake head fish, the watersalinity of 12 ppt was shown to give the highest fertilization and hatching rates. The times of hatching out at water salinityof 0-14 ppt were between 1,192-1,442 minutes.After hatching, the survival tolerance of snake head fish larvae in different salinity (0-30 ppt) within 24 hour were thenstudied using a 50-liter glass aquarium (water volume 30 liters) containing 50 larvae at each level of salinity. All treatmentswere done in triplicate. The survival rate of fish larvae in the 0, 5, 10, 15, 16, 17, 18, 19, 20, 25 and 30 ppt salinity were 100, 100,100, 100, 0, 0, 0, 0, 0, 0 and 0 %, respectively. However, fish larvae that had survived at 15 ppt died after 8 days of rearing.The gain rate of total body length, body weight gain rate and survival rate (%) at 10 weeks at water salinity ranging from 0, 5and 10 ppt were significantly (P<0.05) higher than that at 11, 12, 13 and 14 ppt salinity. However, there were no significancedifferences (P>0.05) among 0, 5 and 10 ppt. |
