Specific growth rate and food conversion efficiency of freshwater crab Barytelphusa lugubris in Kathmandu, Nepal
Dr. Saroj Rana
Experiment was conducted from 17th June, 2007 to 25th07 August with an average room temperature 25.70 c and water temperature of all aquaria was 240c for 70 day son Barytelphusa lugubris to know specific growth rate, food conversion ratio and food conversion efficiency. Twenty four crabs were equally categorized into three groups (A, B and C) based on their weight and carapace width. The initial total weights and carapace widths of each group were 63.17g, 79.50g and 92.97g; 33.80mm, 35.1mm and 37.5mm respectively. Chicken liver thawed in water was supplied to feed the crabs, siphoning of excess food and cleaning of aquaria were done thrice a week. The total amounts of food provided for 70 days were 248 g, 248 g and 306 g. Results demonstrated that the percentage increase in the total weight of crabs were 3.75%, 3.48% and 5.54%. Similarly, percentage increase in CW was 2.99%, 3.79% and 3.955% for group A,B and C respectively. Increase in SGR was 3.38%,4.0% 3.07%; increase in FCE was 0.04, 0.02, 0.01 and increase in FCR was 26.24, 40.41 and 67.46 respectively in three groups. FCR was more for high weighed crab but FCE was low. Thus, the results concluded that despite low FCE and SGR crabs with high weight, increased maximum in weight and food consumption.
Dr. Saroj Rana. Specific growth rate and food conversion efficiency of freshwater crab Barytelphusa lugubris in Kathmandu, Nepal. International Journal of Zoology Studies, Volume 3, Issue 3, 2018, Pages 53-57