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臺灣北部海域鎖管漁業資源之調查評估

  • 日期:110-07-30
  • 計畫編號:109農科-9.2.3-水-A1(1)
  • 年度:2020
  • 領域:漁業科技研發
  • 主持人:張可揚
  • 研究人員:陳玉姬、廖正信

劍尖槍鎖管 (swordtip squid, Uroteuthis edulis) 為臺灣北部海域燈火漁業的重 要漁獲物種之一。由於頭足類資源多受環境影響而呈現年間波動,因此易受過度捕 撈的影響,導致資源的崩潰,凸顯資源評估之重要。本研究針對劍尖槍鎖管進行源 波動趨勢預測模式、環境DNA監測及資源時空分布預測模式等3項研究,其結果可作 為資源管理參考。結果顯示:(1)以2模式預測2021年劍尖槍鎖管資源趨勢皆為下降 。(2)資源時空分佈預測模式所得月別資源分佈預測結果解釋度在20-40%之間。 (3)北部沿海環境DNA指標與2018年相較,測得較多的中國槍鎖管環境DNA,顯示不同 年間鎖管資源比例可能有所不同。

研究報告摘要(英)


 Uroteuthis edulis is one of the important catch species in Taiwan torch light fishery. Because cephalopod resources are mainly affected by the environment and show annual fluctuations, they are susceptible to overfishing, leading to the collapse of resources and highlighting the importance of resource assessment. In this study, three types of researches including the forecasting model of resource fluctuation trend, environmental DNA monitoring, and the forecasting model of resource spatiotemporal distribution were carried out for the sword tip squid. The results can be used as a reference for resource management. The results show that: (1) Using 2 models to predict the trend of sword tip squid resources in 2021 will be all decline. (2) The interpretation degree of the monthly resource distribution prediction results obtained by the temporal and spatial distribution model was between 20-40%. (3) Compared with 2018, the environmental DNA indicators of the northern coastal measured more environmental DNA of U. chinensis, showing that the ratio of squid resources may vary in different years.