瘤荔枝螺对饵料的摄食选择性研究

为了解决瘤荔枝螺亲螺促熟培育的适宜饵料问题，选用菲律宾蛤仔、缢蛏、等边浅蛤、紫贻贝、条纹隔贻贝、小杂蟹、小青占鱼为饵料，研究瘤荔枝螺对7种饵料的摄食喜好性。结果表明，在海水比重1.013~1.015、水温22~25℃，溶氧量4~5 mg/L的条件下，瘤荔枝螺对条纹隔贻贝具有很强的嗜好性，对缢蛏、紫贻贝、小杂蟹也表现出正选择，对菲律宾蛤仔、等边浅蛤、小青占鱼表现为明显的负选择，其被避食程度由弱到强依次为等边浅蛤>菲律宾蛤仔>排卵后等边浅蛤≥排卵后菲律宾蛤仔>小青占鱼。

Bait Selection of Thais bronni

The paper aims to explore suitable bait for parental breeding of Thais bronni. Selective feeding of Thais bronni on seven baits, Ruditapes philippinarum, Sinonovacula constricta, Gomphina veneriformis, Mytilusedulis, Septifer virgatus, small crab and Scomber japonicus, was studied under water temperature of 22- 25℃, specific gravity of seawater 1.013-1.015, and dissolved oxygen level of 4-5 mg/L. The results indicated that T. bronni showed great interest on Septifer virgatus, positive selection to Sinonovacula constricta, Mytilusedulis, and small crab, but negative selection to Ruditapes philippinarum, Gomphina veneriformis, Scomber japonicus, with a clear negative selection order from weak to strong as Gomphina veneriformis, Ruditapes philippinarum, spawning Gomphina veneriformis, spawning Ruditapes philippinarum, Scomber japonicus.