|Budget Amount *help
¥1,300,000 (Direct Cost : ¥1,300,000)
Fiscal Year 1997 : ¥500,000 (Direct Cost : ¥500,000)
Fiscal Year 1996 : ¥800,000 (Direct Cost : ¥800,000)
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.
さらに,ノルパックネットの鉛直曳を行い,大型植物プランクトンを採集した.ネットの枠には小型水深データロガーを装着し,ネットの海水中での挙動を明らかにした.本科学研究役補助金の一部を利用して行われた研究は既に公表されている(小達他,1998;今井他,印刷中:Iinuma et al.,印刷中).