The Culture of Rice-field Crabs, Esanthelphusa dugasti by Using Eggshells Powder as Feed Supplement to Improve the Growth Performance and Survival Rate
DOI:
https://doi.org/10.14456/jare-mju.2024.6Keywords:
rice - field crab, eggshell powder, growth, survival rateAbstract
The study of the culture of rice-field crabs, Esanthelphusa dugasti by egg shell powder supplementation to increase growth efficiency and survival rate was completely randomized design (CRD) experiment which included 5 experimental sets of 3 repetitions each. The 1st experimental set consisted of food without eggshell powder supplementation (control group). Whereas, the 2nd – 5th experimental sets comprised of food with eggshell powder supplementation of 3, 5, 7 and 10%, respectively, by using baby crabs aged 7 days after detaching from their mother’s abdomen. The mean starting weight was 0.006 g with mean initial carapace width of 0.218±0.008 cm and mean initial carapace length of 0.178±0.011 cm. The period of culture was 90 days. It was found that rice-field crabs fed with egg shell powder supplements had better growth efficiency than the control group. Besides, rice-filed crabs with 7% eggshell powder supplementation yielded better growth efficiency of mean weight gain (WG), average daily weight gain (ADG), mean carapace width gain (CW) and mean carapace length gain (CL) for 3.535±0.513 g, 0.039±0.006 g/day, 1.996±0.120 cm and 1.640±0.092 cm, respectively. Moreover, the mean survival rate was 93.333±2.887%. Therefore, the 7% eggshell powder supplementation is suitable for rice–field crab farming and can be further developed to increase the production capacity of rice–field crab farming system.
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