Feeding and Physical Properties on Growing Swamp Eels in Cement Pond

Abstract

The objective of this study was to determine feeding and cement pond physical properties on growing swamp eels.  Types of eel feed were classified 3 groups: Fresh feed (Chenneled apple snail,control group), shrimp feed, catfish feed. Eels were fed 3 days per time (15 g/time).  Swamp eels and soil were taking from phenology of eels at Chompolbuli district, Surin Province. Each cement pond contains four swamp eels (an eel is average weight 220.83±4.27 g ).  Cement ponds were adjusted average pH 6-9 for 14 days before farming eels.  Results showed that The temperatures of external and internal cement ponds varied with to environment temperature. Average temperature of February-July was showed 29-34 degree Celsius. The results showed that cement pond physical properties as   soil color was dark brown, most of the soil was clay, with the average amount of sand, clay and silt before and after culturing as 20.8%,56.9%,22.3% and  20.8%,61.43%,17.6% respectively.The average moisture and soil density before and after culturing as 11.51%,18.89 % and 18.32%,15.5% respectively. Soil pH before and after culturing as 6.76 and 7.53, the organic matter (OM) values ​​before and after culturing were low to very low. For the pH, Do, and BOD of water before and after culturing  are 7.29,3.50,5.30 and 7.66,3.70,6.70. After farming the eels for 2 months, the soil pH in the pond tended to increase,in which ponds cultured with Cheneled apple snails have the highest pH. However,The pH in the ponds will decrease in the 1st and 2nd months. The pH in the pond fed with Cheneled apple snails is 7.36, the eels fed in cheneled apple snails will grow best with average weight  416±2.13 grams