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相關文獻
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頁籤選單縮合
題 名 | Using Fuzzy Synthesis Approach to Extract Fishing Efforts Directed on Albacore for Taiwanese Longline Fleets in the Indian Ocean=以模糊綜合評判法分離臺灣鮪延繩釣漁船在印度洋捕撈長鰭鮪的漁獲努力量 |
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作 者 | 汪淑慧; 許建宗; 劉錫江; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 28:2 2001.06[民90.06] |
頁 次 | 頁105-118 |
分類號 | 439.24 |
關鍵詞 | 模糊綜合評判法; 鮪延繩釣漁船; 長鰭鮪; 漁獲努力量; Albacore; Fuzzy synthesis; Fishing effort; Longline; Membership function; |
語 文 | 英文(English) |
中文摘要 | 印度洋長鰭鮪漁業是臺灣鮪延繩約漁船最重要的鮪漁業之一。印度洋長鰭鮪系群 評估通常應用臺灣鮪延繩釣漁船所提送的漁業資料。然而,這些漁業資料可能包有兩種造成 標準化單位努力漁獲量困難的漁業型態。 因此,本研究以 1979-1997 年的作業報表單日漁 獲資訊做分析的基本資料,使用模糊綜合評判法來分離不同漁業型態的漁獲努力量。模糊轉 換包含權重向量和因子函數矩陣,權重向量使用非等值真值,和因子函數矩陣使用在漁船噸 位級別、漁撈區域、使用鉤數和海表層水溫定義下之捕獲長鰭鮪、大目鮪和黃鰭鮪之長鰭鮪 比值分布。由模糊轉換的運算所得到的結果,可連續獲得新的漁獲量、漁獲努力量和單位努 力漁獲量序列。本研究結果可初步証實模糊綜合評判法是可以用於分離不同漁業型態的漁獲 努力量方法之一。 |
英文摘要 | Indian albacore fishery is one of the most important tuna fisheries for Taiwanese longline fleets. The assessment of the Indian albacore stock is usually based on fishery-dependent data submitted form Taiwanese longline vessels. Moreover, those fishery data may contain two fishing types that are able to make standardizing catch per unit effor difficult. Therefore, in the present study, an alternative approach of fuzzy synthesis clustering is used to partition the fishing efforts from different fishing types, and the daily set catch information of logbooks from 1979 to 1997 is used as the fundametal data for this purpose. A fuzzy transformation is composed of weighting vector and membership fuction, in which the weighting vector used an unequal crisp value and the membership function used the distribution of percent catch of albacore in total of albacore, bigeye tuna, and yellowfin tuna under the factors of vessels' tonnage categories, fishing area, the number of hooks used and sea surface temperature. Subsequently, the result is obtained from the computation of fuzzy trnasformation, then, new catch, fishing effort and catch per unit effor series were obtained. The fuzzy snthesis is evidenced as one of the methods using for partitioning fishing efforts from different fishing types in preliminary. |
本系統中英文摘要資訊取自各篇刊載內容。