饵料种类、密度和pH对不同规格黑蝶贝滤水率的影响  

Effects of microalgae species,microalgae densities and pH on filtration rate of Pinctada margaritifera( Linne) with different body size

作　　者：严俊贤[1] 陈明强[1] 李有宁[1] 吴开畅[1] 

机构地区：[1]中国水产科学研究院南海水产研究所,农业部南海渔业资源开发利用重点实验室,广东广州510300

出　　处：《渔业现代化》2015年第2期11-15,共5页Fishery Modernization

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(2013TS09);三亚市农业科技创新项目(2014NK09);海南省重点科技计划项目(06123);现代农业产业技术体系建设专项资金(CARS-48)

摘　　要：为了解黑蝶贝(Pinctada margaritifera)的滤食特性,利用一次性加入饵料的方法,设置4种个体规格、5种单胞藻饵料、5个p H梯度和饵料密度梯度,研究了不同因素对黑蝶贝滤水率(FR')的影响。结果显示:FR'随体重的增大先上升后下降,回归拟合方程:FR'=-0.000 359 x2+0.074 x-2.272,R2=0.854;黑蝶贝对5种单胞藻饵料的滤水率大小次序为:小球藻>球等鞭金藻>绿色巴夫藻>牟氏角毛藻>亚心形扁藻;FR'随着p H的升高而升高,到p H为8.6左右时开始下降,其拟合关系为:FR'=-0.331x2+5.621x-23.198,R2=0.739;FR'与一定饵料密度范围内呈明显的峰值变化,饵料密度为4.38×105Cell/m L时达到最大,其拟合方程为:FR'=-0.234x2+2.036x-2.959,R2=0.852。通过可知,饵料种类、p H、饵料密度和规格对黑蝶贝滤水率的影响显著(P<0.05)。In order to understand the filtration characteristic of Pinctada margaritifera under different conditions, the filtration rates （FR＇） of P. margaritifera were studied with method of single feeds adding. 5 species of microalgae were used in this study. And 4 sizes of shellfish body, 5 gradients of pH and density of microalgae were set in the method. The results showed： （1） The FR＇increased firstly and then declined with the increasing of body weight. The regression fitting equation was： FR＇ = -0. 000 359x2 ＋ 0. 074x -2. 272, R2 =0.854; （2） The sequence of FR＇on 5 species of microalgae was as follows：Chlorella vulgaris 〉 Isochrysis galbana 〉 Pavloca viridis 〉 Chaetoceros mulleri 〉 Platymanas subcordiformis ; （ 3 ） FR＇rose with the increase of pH firstly, and then declined from pH of 8.6. The equation was ：FR＇ = -0. 331x2 ＋ 5. 621x -23. 198, R2 = 0. 739; （4） In a certain range of diet density, the FR＇showed a peak value change, reaching to maximum as the diet density of 4.38 x 105 Cell/mL. The equation was： FR＇ = -0. 234x2 ＋ 2. 036x -2. 959, R2 = 0. 852. This study showed that there are significant correlation among the filtration rate of P. margaritifera and the microalgae species, pH, density of microalgae, body sizes of shellfish

关 键 词：黑蝶贝 滤水率 饵料密度 PH 规格 

分 类 号：S963.14[农业科学—水产养殖]