食物类型和浓度对双齿许水蚤摄食的影响Effect of Type and Density of Feed on Ingestion Characteristics of Schmackeria dubin
罗晓霞,黄翔鹄,洪腾
摘要(Abstract):
在不同饵料条件下,对双齿许水蚤(Schmackeria dubin)的清滤率(mL.只-1.h-1)、滤食率(细胞.只-1.h-1)和摄食率(mg.只-1.h-1)进行了测定。结果表明:以湛江等鞭金藻(Isochrysis zhanjiangensis)为饵料,其浓度为15×104~120×104 mL-1时,双齿许水蚤的摄食率达到较大;分别饲以同生物量的牟氏角毛藻(Chaetoceros müelleri)、亚心形扁藻(Platymonas subcordiformis)、湛江等鞭金藻、小球藻(Chlorella sp.)时,饵料为角毛藻和扁藻时双齿许水蚤的摄食率达到较大;饲以同生物量的牟氏角毛藻、亚心形扁藻、湛江等鞭金藻、小球藻、颤藻(Oscillatoria sp.)、小环藻(Cyclotella sp.)六种藻的混合饵料时,双齿许水蚤对湛江等鞭金藻的摄食率和选食率均为最大,分别为0.0458 mg.只-1.h-1和17.1%。可见,饵料浓度、饵料种类、混合饵料对双齿许水蚤的清滤率和摄食率均有显著影响(P<0.05)。
关键词(KeyWords): 双齿许水蚤;摄食;饵料浓度:食物类型;混合饵料
基金项目(Foundation): 科技部农业科技成果转化资金项目(2006GB2E000224);; 广东省科技计划项目(2006A20305003);; 广东省重大科技兴海(兴渔)项目(B200608A203)
作者(Author): 罗晓霞,黄翔鹄,洪腾
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