泥螺养殖滩面饵料生物的调查研究

Investigation and Study of the Creature as Food in the Shoal of Rearing Bullacta exarata

1999年2～10月,在浙江慈溪的泥螺养殖滩面,进行了泥螺饵料、养殖滩面饵料的调查研究工作。结果表明:泥螺的食物组成比较简单,主要为硅藻门的菱形藻属、双眉藻属、舟形藻属、斜纹藻属、布纹藻属、卵形藻属、双壁藻属、羽纹藻属、圆筛藻属、双菱藻属、小环藻属、脆杆藻属以及少量的有机碎屑、小型甲壳类、无脊椎动物的卵等;泥螺对食物没有严格的选择性;泥螺消化道内的藻类组成随泥样中的藻类优势种的季节变化而变化;泥螺对饵料生物没有明显的选择性。

All samples used in this experiment were collected from Cixi city of Zhejiang province in 1999- 2000.The result shows as follows:The food composition of Bullacta exarata is simple.In general,they are Nitzschia Hass,Amphora Ehr,Pleurosigma Wsmith,Gyrosigma Hass,Coscinodiscus Ehr,Navicula Bory,Pinnularia Ehr,Fragilaria Lyngb,Achnanthes Bory,Diploneis Ehr,Cyclotella Kutz,Cocconeis Ehrenberg and a lot of organic detritus,sludgy dwarfing crabs,eggs of invertebrate.The Prevailing foods change with the season.And the Bullacta exarata doesn′ t select its food.