曼氏无针乌贼人工配合饲料物理性状的研究

观察比较了曼氏无针乌贼对不同颜色、形状、软硬度和沉浮性人工配合饲料的摄食频率．结果表明：1）曼氏无针乌贼对褐色饲料的平均摄食频率最高（26．2次／h），显著高于对其他颜色饲料的平均摄食频率（P〈0．05）；对绿色饲料的平均摄食频率最低（5次／h），对不同颜色饲料的平均摄食频率从高到低的排列次序为：褐色〉红色〉黄色〉紫色〉原色〉蓝色〉绿色．2）对长条状的饲料平均摄食频率为25．5次／h，显著高于球状饲料的19．8次／h和片状饲料的9．3次／h（P〈0．05）．3）乌贼幼体更喜欢选择软颗粒饲料和沉性饲料，对软颗粒饲料的平均摄食频率（40．2次／h）显著高于硬颗粒饲料（23．7次／h）（P〈0．05），对沉性饲料的平均摄食频率（20．7次／h）显著高于浮性饲料（8．8次／h）（P〈0．05）．由此可见，曼氏无针乌贼趋向选择褐色或红色、长条状、沉性的软颗粒饲料．

Physical Properties of Artificial Diets for Juvenile Sepiella maindroni

This study was conducted to investigate the effect of physical properties of artificial diets, including colors, shapes, hardness and density on feeding The highest and lowest feeding frequency （26. 2 times/h） frequency of juvenile cuttlefish Sepiella maindroni. were observed in groups of cuttlefish fed with brown and green diets （5 times/h）, respectively. Among different colors of experimental diets, feeding frequency from high to low was as follow： brown 〉 red 〉 yellow 〉 purple 〉 original 〉 blue 〉 green ; Cuttlefish fed with long-round shape diet （25.5 times/h） had significantly higher feeding frequency than those fed with sphere （19.8 times/h） or flake diets （9.3 times/h） （P 〈 0.05） ; The feeding frequency in moist pellet group （40. 2 times/h） and sinking pellet diet group （20. 7 times/h） were significantly higher than those in dry pellet diet group （23.7 times/h） and floating pellet diet group （8.8 times/h） （P 〈 0.05） , respectively. It could be concluded that juvenile Sepiella maindroni tend to select feed with brown or red color, long-round shape and sinking moist pellet.