Studies on trophtype of neritic

1996年7月至1997年10月在丰卡湾的14个监测站进行了海洋观测和浮游生物取样。海水样本（2-5升）采用Niskin采样器，采样深度为0-50 m，间隔约10 m。用200微米筛网过滤海水，用20微米筛网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，冷藏保存。这些样品制备后用荧光显微镜进行显微观察。同时，对海水样品进行营养物浓度的自动分析仪测定和叶绿素a浓度的荧光法测定。采用N，N-二甲基甲酰胺提取叶绿素a。此外，利用微型深度数据记录器研究了垂直拖曳Norpac网的最大到达深度和网的水下运动。部分由科学研究资助基金(C)(2)（#08660215）支持的研究已经发表（Odate et al., 1998; Imai et al., in press; Iinuma et al., in press）。现在正在进行显微镜观察。研究结果将于近期公布。

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.