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水產研究(1993年創刊)

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  • 日期: 2019-10-15
水產研究(1993年創刊)-以單位加入親魚量模式進行臺灣近海鋸峰齒鮫之資源評估
主題: 以單位加入親魚量模式進行臺灣近海鋸峰齒鮫之資源評估
摘要(中):
近年來,鯊魚之資源保育與管理成為國際保育團體所注目的焦點。臺灣為主要鯊魚漁獲國家之一,因此鯊魚資源的評估與管理對我國十分重要。鋸峰齒鮫 (Prionace glauca) 為我國中小型鮪延繩釣漁業最常捕獲的大型鯊魚,主要卸漁港口在宜蘭南方澳,屏東東港與臺東成功三個港口,根據本研究估算,年漁獲量在7,233 ~ 16,080 mt 之間。臺灣中小型鮪延繩釣漁船漁獲鋸峰齒鮫之單位努力漁獲量自2001年以來呈現先上升後下降之趨勢,最近三年單位努力漁獲量較前幾年低。利用人口學矩陣估算北太平洋鋸峰齒鮫族群成長率為 0.329±0.089,世代間隔週期為 8.67±2.12 年,在大型鮫類中算是成長速率較快之物種。估算太平洋鋸峰齒鮫系群資源 SPR=40% 之生物參考點結果為 F=0.193 yr-1(±0.036),三種模擬結果顯示北太平洋鋸峰齒鮫 Fcur/F40% 分別為0.57、0.81 與0.72。顯示現今漁獲壓力適當,並無高於太平洋鋸峰齒鮫可容許之參考點。
出版日期: 2016/12/31
標題title(英): Spawning Per Recruit Analysis of the Blue Shark (Prionace glauca) in the Coastal Waters of Taiwan
作者: 陳威克‧金建邦‧劉光明
卷別: 24
期別: 2
頁碼: 1-10
作者 auther(英): Wei-Ke Chen, Chien-Pang Chin and Kwang-Ming Liu
摘要abstract(英): Shark conservation and management have become issues of great concern for international conservation organizations in recent years. For Taiwan, as one of the leading shark fishing countries, the evaluation and management of shark resources are extremely important. Prionace glauca (blue shark) is the most commonly caught large shark species in small and medium-scale longline fishing in Taiwan. Three main fishing ports include Nanfangao Fishing Port in Yilan, Tungkang in Pingtung, and Chenggong in Taitung. Estimated annual yields are between 7,233-16,080 mt. Since 2001, the nominal catch per unit effort (CPUE) of blue shark caught by Taiwanese longline fisheries had an upward tendency, followed by a downward tendency. The nominal CPUE during the last three years has been lower than that in previous years. Demographic matrix assessment indicated that blue sharks in the North Pacific are characterized by population growth rate of 0.329±0.089 and generation interval of 8.67±2.12 years. This is a species with a relatively high growth rate among large sharks. As SPR at 4%, the estimated biological reference point F for Pacific blue shark is equal to 0.193 yr-1 (±0.036), and Fcur/F40% are equal to 0.57, 0.81, and 0.72 in the scenario 1-3, respectively. The results suggest the current fishing pressure is appropriate and is below the sustainable biological reference point for blue shark stock in the Pacific Ocean.
使用語言: 中文
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