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台灣東北海域鯖<魚參>漁場及其與海況、氣象因素間的關係

  • 出版日期:82-06-01
  • 標題title(英):
    Relationship between Oceanographic and Meteorological Factors and the Mackerel Fishing Grounds in the Northeastern Waters of Taiwan
  • 作者:林雅民, 郭慶老
  • 作者auther(英):Lin, Y. M. and C. L. Kuo
  • 卷別:1
  • 期別:1
  • 頁碼:1-9

利用台灣省水產試驗所 NOAA-HRPT 衛星遙測1990及1991連續 2年資料,配合標本 船所測漁海況調查及氣象局之氣象資料,探討台灣東北海域海況之變動及其受氣象因素 影響與鯖類漁場形成機制的關係,初步獲得之結果為:秋冬季為鯖魚類之盛漁期, 其主要漁場位於黑潮主流與中國大陸沿岸流間相互推移時所形成的鋒面帶 (溫約 1℃) 之潮境域 (溫差≧ 3℃) 。一般船測僅局部於湧昇流及潮境域作業,經由衛星大範圍遙 測之功能,發現可追尋湧昇流及潮境域,以擴大作業範圍。
彭佳嶼海域可形成湧昇流鯖漁場,該湧昇流之周圍可構成反時鐘渦漩之優良漁場 ,但非位於其內部,且該湧昇流周圍主要為低溫高鹽呈濃綠水色的植物性浮游生物之聚 集處。夏季時,台灣東北鯖海域不易形成潮境漁場,漁船尋找湧昇流域會有較佳之漁 況。每當夏季台灣附近海域如有發生低氣壓、熱帶性低氣壓或颱風時,則極易形成湧昇 流。

摘要abstract(英)


The mechanism of formation of mackerel fishing grounds in the waters off northeastern Taiwan was studied based on data obtained from the NOAA-HRPT satellite remote sensing system of TFRI, fishing vessels, and meteorological observatories. These data include sea surface water temperature images, fishing and oceanographic conditions and weather reports from 1990 to 1991. The preliminary results were as follows:
Mackerels were observed mainly during autumn and winter in the waters off northeastern Taiwan. This fishing ground was found in the oceanic front where the main Kuroshio current and the China coastal current converges. Using the aid of satellite macroscopic scanning, fishermen can easily locate the fishing grounds with upwelling and oceanic front.
Another mackerel fishing ground formed by upwelling was also found in the waters around Peng-chia-yu. This fishing ground is mainly around the peripheral part of the upwelling area, which was a counterclock gyre. The area is characterized by low temperature and high salinity, and an aggregation of dark green phytoplankton. During summer, oceanic fronts are rarely observed. Thus, fishing vessels usually seek for upwellings for possible good fishing conditions. When low pressure or typhoon occurs, upwelling is formed.