Modelling and Analysis of Quantitative Ecological Risk Assessment for Fishery Resource in the Waters around Eastern Taiwan (II)

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Project title

Code/計畫編號

MOST107-2611-M019-012

Translated Name/計畫中文名

台灣東部海域漁業資源之計量性生態風險評估模式建構與分析(Ⅱ)

Project Coordinator/計畫主持人

Sheng-Ping Wang

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

江偉全

Department/Unit

Department of Environmental Biology and Fisheries Science

Website

https://www.grb.gov.tw/search/planDetail?id=12672963

Year

2018

Start date/計畫起

01-08-2018

Expected Completion/計畫迄

31-07-2019

Bugetid/研究經費

927千元

ResearchField/研究領域

海洋科學

台灣東部海域為台灣沿近海最重要的漁場之一，無論是在漁業類別或漁獲物種皆具有高度的多樣性，然而過去鮮少有研究關注於此海域各漁業的利用程度及對各物種間的影響。本研究過去已採用半計量性生態風險評估模式針對進行台灣東部海域漁業資源之生態系風險評估，目前之評估結果顯示，高風險魚種共有7種，另外中風險魚種共有14種。雖然根據生態風險分析方法之結果可評判出何物種是屬於對漁業利用具高敏感度，然而由於分析結果僅提供各物種對於漁業利用的相對風險屬性量度，並無法針對風險和可持續性以確切的計量指標進行評估。此外，在漁業管理層面也需要更為確切的生物量與漁獲利用度之相對變動趨勢作為參考依據，因此即使在目前台灣沿近海漁業相關資料並不齊全的情形下，仍有必要以進一步以數值方式分析漁業利用對於各物種之影響風險。因此，本研究擬藉由資料受限之資源評估模式建構與分析，以針對具有高度風險魚種進行資源評估評估。此外，漁獲統計資料的正確性往往是最為人關切的一環，本研究也將嘗試利用蒙地卡羅模擬分析漁業統計資料不確定性對資源評估結果的影響。而本研究之模式建構與發展未來亦可進一步應用於其他台灣沿近海域漁業之資源狀態分析。 The waters around eastern Taiwan is one of the most fishing ground for Taiwanese coastal and offshore fisheries. The types of fisheries and species of catches are highly diverse in this area. In the past, however, few previous studies focused on the impact of fishing exploitation on the species of fisheries resource and their interactions. The ecological risks have assessed for the fisheries resource in the eastern Taiwan waters based on semi-quantitative ecological risk analyses and the results indicated that 7 species were highly risky and 14 species were moderately risky. Although ecological risk analyses were widely and easily applied to evaluate the sensitivity to fishery impact on many stocks. However, these methods cannot clearly define quantitative indices to assess the risk and sustainability and thus cannot adequately reflect the most obvious changes in risk to stocks. In addition, more definite relative trend of biomass and fishery exploitation are also needed for fisheries management as references. Therefore, it is necessary to analyze the impact of fishery based on a quantitative approach even though the fishery statistics related information are not complete for Taiwanese coastal and offshore fishery. This study attempts to conduct the modelling and analysis based on data-limited approaches and implement assessments for the high risky fisheries resources in the eastern waters of Taiwan. In addition, the accuracy of fisheries statistics is often concerned by experts. This study will also analyze the uncertainties of data or biological parameter on assessment results. The results of this study can be further applied to the stock assessments for other fisheries in waters of Taiwan.

Keyword(s)

計量模式建構
資料受限方法
台灣東部
漁業資源
Quantitative modelling
Data-limited approach
Eastern Taiwan
Fishery resource

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Modelling and Analysis of Quantitative Ecological Risk Assessment for Fishery Resource in the Waters around Eastern Taiwan (II)

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