Effects of photoperiods on growth and quality of white leg shrimp (Litopenaeus van-namei) in biofloc system

CTU Journal of Innovation and Sustainable Development - 2017
Ngoc Hai Tran1, Quoc Viet Le1, Minh Phu Tran2, Van Ngan Truong
1BM.Ky thuat nuoi hai san, Khoa Thủy sản
2BM. Che bien thuy san, Khoa Thủy sản

Tóm tắt

This study aims to determine suitable photoperiod for growth of white leg shrimp in supper-intensive tank culture system applying biofloc technology. The experiment was randomly designed indoor with different photoperiod treatments, including (i) 24 hours Dark; (ii) 6 hours Light: 18 hours Dark; (iii) 12 hours Light: 12 hours Dark; (iv) 18 hours Light: 6 hours Dark and  (v) 24 hours Light. The lighting treatments, it was set with a 55w compact fluorescent (light intensity ~ 6000 lux). Shrimp with initial weight at 0.84g and 4.45cm of body length were cultured at density of 150 inds/m3 in Biofloc system (C:N=15:1), with 300L of water volume, 15‰ of salinity. Results showed that after 90 days of culture, water quality were in suitable range for shrimp growth. Body weight (BW) of shrimp among treatments were from 18.28 to 22.96 g. In which, BW of shrimp in completely dark condition was the lowest and significantly different compared to the others (p3), not significantly different compared to 18 hours Light (2,23kg/m3 ) but significantly different compared to the others. Besides, shrimp in the treatments with Light showed stronger color compared to shrimp in completetly dark condition.

Từ khóa

#Biofloc #photoperiod #white leg shrimp

Tài liệu tham khảo

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