Experimental study of bioturbation by Sipunculus nudus in a polyculture system
文献类型: 外文期刊
第一作者: Li, Junwei
作者: Li, Junwei;Zhu, Changbo;Guo, Yongjian;Xie, Xiaoyong;Chen, Suwen;Huang, Guoqiang
作者机构:
关键词: Sipunculus nudus;Mugil cephalus;Polyculture;Transportation rate;Sediment
期刊名称:AQUACULTURE ( 影响因子:4.242; 五年影响因子:4.723 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Bioturbation by Sipunculus nudus in a fish-Sipunculus polyculture system was investigated using two controlled experiments. The first experiment was conducted in 20 breeding tanks (water volume 550 L) in which unfed S. nudus (mean weight 1.2 +/- 0.1 g) were stocked in the bottom sandy sediment at four different densities: 0 (control), 50, 100 and 150 individuals per tank. In each tank, 3 juvenile Mugil cephalus (mean weight 24.5 +/- 0.5 g) were cultured with a normal ration supply in a net cage (diameter 0.8 m, height 0.6 m) suspended in the seawater above. The experiment was conducted for 60 d. The second experiment, which was conducted for 20 d, quantified the transportation ability of S. nudus on the surface sediment. S. nudus (mean weight 1.3+/- 0.1 g) were stocked in the sandy sediment in 25 aquaria (31 cm x 20 cmx 30 cm) at five densities (0, 4, 8, 12 and 16 individuals per aquarium). The sediment was prepared in layers: the bottom layer was a 6-cm-thick layer of medium sand (grain size 0.40-1.10 mm), and the top layer was a 1-cm-thick layer of fine sand (grain size 0.10-0.28 mm).
分类号: S9
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