论文部分内容阅读
实验生态条件下以饵料密度差减法研究了不同密度的四种饵料微藻:小球藻(Chlorella vulgaris Beij)、青岛大扁藻(Platymonas helgolandica Kylin var.tsingtaoensis)、等鞭金藻8701(Isochrysis galbana Parke 8701)、小新月菱形藻(Nitzschia closterium f.minutissima)对褶皱臂尾轮虫(Brachionus plicatilis)幼虫摄食的影响,分析了由等生物量混合的小球藻、青岛大扁藻、小新月菱形藻所组成的混合饵料对其摄食和选食的影响。结果表明:(1)单一饵料培养条件下褶皱臂尾轮虫幼虫滤水率和摄食率均受饵料密度的影响,滤水率随着饵料密度的增加逐渐下降,摄食率的变化略有不同即随着饵料密度的增加呈现先上升后下降的趋势;褶皱臂尾轮虫幼虫的滤水率和摄食率也均受饵料种类的影响,总体表现出滤水率青岛大扁藻>小新月菱形藻>小球藻,摄食率小球藻>小新月菱形藻>青岛大扁藻的变化规律,表明褶皱臂尾轮虫幼虫对不同种类微藻的摄食具有选择性。(2)等生物量混合的三种微藻组成的混合饵料培养条件下褶皱臂尾轮虫幼虫的滤水率和摄食率与单一微藻种类培养条件下相比发生了变化,混合饵料中三种单胞藻的滤水率、摄食率、选食率和选择性指数大小的顺序呈现一致的规律,均为小球藻>小新月菱形藻>青岛大扁藻。实验结果表明,褶皱臂尾轮虫幼虫对不同种类的微藻摄食具有选择性,小球藻是最适宜的饵料。
Under the experimental ecological conditions, four kinds of food algae with different densities, Chlorella vulgaris Beij, Platymonas helgolandica Kylin var. Tsingtaoensis, Isochrysis galbana 8701 Parke 8701) and Nitzschia closterium f. Minutissima on the feeding of Brachionus plicatilis larvae were studied. Chlorella mixed with equal biomass, Effects of mixed bait on the feeding and food selection of the rhizosphere of Rhizoctonia. The results showed that: (1) The water filtration rate and food intake rate of Brachionus plicata were affected by the density of feed under the single feed culture condition. The water cut rate decreased with the increase of feed density, and the changes of feed intake rate were slightly different With the increase of feed density, the trend of first ascend and then descend tends to be the same. The water filtration rate and feeding rate of Steppe rotifers are also influenced by the type of food, Chlorella vulgaris, Chlorella vulgaris, Chlorella vulgaris> Cyclocarya newtonii> P. zingiberensis showed that the Larvae of the Pleurotus ostreatus was selective for the feeding of different species of microalgae. (2) mixed with three kinds of micro-algae biomass mixed feed culture conditions under the conditions of Microflora species and culture rate, The order of the filtration rate, feeding rate, selective rate and selective index of species of unicellular alga showed the same pattern, which was Chlorella vulgaris> The experimental results show that the larvae of the Pleurotus ostreatus are selective for the feeding of different kinds of microalgae, and Chlorella is the most suitable bait.