This study included 2 experiments and was conducted to evaluate the effects of light conditions on the hatching rate, growth and survival rate of black apple snail Pila polita. The first experiment evaluated the influence of light conditions on the hatching rate of snail eggs with 3 treatments and 8 replicates in each treatment as follow: strong, medium and low light intensity. In the second experiment, newly hatched snails were cultured in different light conditions similarly to the first ones, snails with initial weight and shell height of 0.03 g and 4.8 mm were reared in the plastic tanks at the density of 300 ind/m2. Results showed that black apple snail eggs reached highest hatching rate at low light intensity from 1000-9000 lux (83.8 %) with hatching time (9.25 ± 0.5 days) and the results were higher than those from other treatments (p0.05). In low light intensity condition, snails also reached highest body weight and shell height (1.56 g and 20.0 mm) compared to those from strong (1.21 g and 18.23 mm) or medium light intensity (1.22 g and 18.57 mm).
Tạp chí khoa học Trường Đại học Cần Thơ
Lầu 4, Nhà Điều Hành, Khu II, đường 3/2, P. Xuân Khánh, Q. Ninh Kiều, TP. Cần Thơ
Điện thoại: (0292) 3 872 157; Email: tapchidhct@ctu.edu.vn
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