Studies on trophtype of neritic

1996年7月至1997年12月，在Funka湾的14个站进行了海洋学观测和浮游生物采样。从0-50 m深度采集海水样品（2-5窝），使用Niskin采样器，间隔10 m。用200 μ m筛过滤海水，用20 μ m筛收集滤液中的浮游生物。浮游生物样品用缓冲福尔马林（2%v/v）固定，并保存在冰箱中。制备这些样品，使用落射荧光显微镜进行显微镜观察。同时，对海水样品进行营养盐浓度自动分析仪测定和叶绿素a浓度荧光法测定。用N，N-二甲基甲酰胺提取叶绿素a。此外，使用微型深度数据记录仪，垂直拖曳Norpac网达到的最大深度和网的水下运动进行了研究。部分由科学研究补助金（C）（2）（#08660215）支持的一些研究已经发表（Odate等人，1998年：Imai等人，出版中：Iinuma等，出版中）。现在进行显微镜观察。结果将在不久的将来公布。

Oceanographic observations and plankton samplings were conducted at 14 stations in Funka Bay from July, 1996 to Octover, 1997. Seawater samples (2-5 litters) were collected from 0-50 m depth with ca. 10 m interval using Niskin samplers. The seawater was filtered using 200 ummeshed screen, and plankters in the filtrate were collected with 20 um meshed screen. The plankton samples were fixed with buffered formalin (2% v/v) and was kept inrefrigerator. These samples were prepared for microscopic observation using an epifluorescence microscope. At the same time, seawater samples for determinations of nutrient concentrations using Auto Analyzer and chlorophyll a concentration by fluorometry. Extraction of chlorophyll a was conducted using N,N-dimethylformamide. Furthermore, maximum depth that a vertically towed Norpac net reached and underwater movement of the net were investigated using a micro depth data logger. Some studies which were partly supported by this Grant-in-Aid for Scientific Research (C) (2) (#08660215) have been already published (Odate et al., 1998 : Imai et al., in press : Iinuma et al., in press). Microscopic observations are conducted now. The results will be published in near future.