66 Navicula 舟形藻 Phylum: Heterokontophyta 门：不等鞭毛門 Class: Bacillariophyceae 纲：羽紋硅藻綱 Order: Naviculales 目：舟形藻目 Family: Naviculaceae 科：舟形藻科 Morphology Cells are boat-shaped, motile, and solitary. Cells are lanceolate, roughly rhombic or elliptical in valve view. Valves are bilateral symmetry on both sides of apical axis and transapical axis, with a longitudinal raphe and a nodule in the middle. The lengths (apical axis) range from 10 to 65 µm and the width (transapical axis) range from 5 to 10 µm. According to AlgaeBase, more than 1600 species are recorded in genus Navicula which is difficult to identify into species level based on microscopic observation only. Ecology and distribution Navicula species are cosmopolitan, planktonic, and benthic. They are rich in fatty acids and hence serves as important food for aquaculture. 形態 細胞整體呈舟形，可以自主移動，一般單細胞生活。殼面呈披針形，近菱形或橢圓 形。殼面沿頂軸及橫軸都兩側對稱，具中央節及殼縫。殼環面觀呈長方形。基於 AlgaeBase 的資料，舟形藻屬具有超過1600 多個物種，但在顯微鏡下很難鑒定到 物種水準。 生態與分佈
RkJQdWJsaXNoZXIy NDk5Njg=