The Effect of Different Feed and Stocking Densities on Growth And Survival Rate Of Blue Swimming Crablets (Portunus pelagicus)

3rd International Conference on Tropical and Coastal Region Eco Development 2017

地球科学;生态环境科学

Ariyati, R.W.^1 ; Rejeki, S.^1 ; Bosma, R.H.^2

Aquaculture Department, Faculty of Fisheries and Marine Sciences, Diponegoro University, Jl. Prof. H. Soedarto, SH, Tembalang, Semarang

50275, Indonesia^1

Aquaculture and Fisheries Group, Wageningen University, De Elst 1, Wageningen

6708 WD, Netherlands^2

关键词: blue swimming;    Carapace widths;    Commercial fisheries;    crablet;    Different densities;    Economic values;    Stocking density;    Sustainable solution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/116/1/012071/pdf
DOI  :  10.1088/1755-1315/116/1/012071

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Blue swimming crab is targeted by commercial fisheries because of the high economic value, good taste, and attractive colors. As a result, the stock is overexploited and fisherman catch market also juveniles. The most sustainable solution would be to stop fishing for commercial trade and to culture this crab from brood to market size. This study aimed to find the best feed and stocking density for the on-growing of crablets. In 20 tanks juvenile crabs with a carapace width±1 cm were stocked in three densities; 40, 60 and 80 crablets / m2, and fed ad-libitum twice a day with either trash fish or pellets of shrimp feed, for 8 weeks. The circular ( 1.6 m x 1 m) tanks with 1 m3of water were aerated, and temperature, salinity, dissolved oxygen and pH recorded daily. In the end, growth and survival rates were determined. In general, feeding the crablets at a density of 40 m-2gave the highest growth. For crablest fed with pellets, the density of 40 m-2gave significantly better growth than 80 m-2. The crablets at a density 40 m-2having a fish diet with the density 40 m-2grew better than 60 and 80 m-2. There was no significant difference between fed used among different densities. The lower densities resulted in higher survival, either on crablets fed with pellets or fish. But, crablets fed the fish diet and cultured in the lowest density (40 m-2) had the highest survival rate.