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題名:Geographic Distribution and Area Demarcation on the Fisheries Resource of South Atlantic Albacore    
南大西洋長鰭鮪資源地理分布特徵與作業漁區劃分
著者:Chi-Lun Wu(吳繼倫) ;Shean-Ya Yeh(葉顯椏)
出版地區:台灣
出版城市:台北市
學科:地球科學
關鍵字:South Atlantic ; Albacore ; Fishing area ; Hooks between floats
刊名:ACTA Oceanographica Taiwanica
卷期:40卷1期(2002.6)
頁碼:81-92
語言:英語
摘要: 中文摘要PDF ; 英文摘要PDF

南長鰭鮪年產量近十年來約在25,000~40,000公噸之間,而台灣的漁獲量約為總產量的60%,為南大西洋長鰭鮪資源的最主要利用國家。根據南大西洋臺灣鮪延繩釣漁業1995年至1998年間漁撈日誌所記錄的作業筐鉤數配置與漁獲組成資料,經研析其時空分布特徵顯示:(1)我國傳統鮪延繩釣漁業(regular longline fishery,簡稱RLL)係配置每筐≦9鉤之漁法,其主要作業海域在15°S以南並以長鰭鮪為標的魚種;(2)配置每筐≧12鉤數作業係屬深層式漁法(deep longliner fishery,簡稱DLL),其主要作業海域在熱帶海域捕捉大目鮪;(3)配置每筐10和11鉤之漁法應屬兩種作業型態的中間型,為漁船作業的另一種彈性方式,其主要作業海域在10°S~15°S以北係以大目鮪為標的,以南則以長鰭鮪為標的。 根據1968年至1998年間南大西洋臺灣鮪延繩釣漁獲統計資料,經由聚落分析所得結果顯示南大西洋可劃分為3個亞漁總區:亞漁總區1(位於10°S~15°S以北至5°N之間的海域),亞漁總區2及亞漁總區3則分別毗鄰其下。亞漁總區2及亞漁總區3,為長鰭鮪資源主要分布區域,亦是RLL的主要作業漁場。亞漁總區1,長鰭鮪漁獲極為稀疏,該區係為DLL漁船以大目鮪為其主要標的魚種之作業漁場。再由長鰭鮪名目釣獲率之邊緣區變率(marginal rate of area regrouping,簡稱MRAR)感度分析顯示,當亞漁總區2向北擴展5度即刻造成呈現系統性的顯著遞減趨勢,顯示亞漁、總區1、2間的地理限界劃分適當。
Catch rates distribution by gear type in terms of number of hooks deployed between floats were compared based on logbook returns of 1995-1998 Taiwanese long liners fished in the South Atlantic. The results indicate that (1) traditional regular long liners (RLL) targeting albacore mainly fishing in the area southward of 10-15° S are using less than or equal to 9 hooks between floats deployment; (2) newly emerged since mid 1980s deep long liners (DLL) targeting big eye tuna mainly fishing in the tropical waters are deploying greater than or equal to 12 hooks between floats; (3) those opportunistic long liners deploying 10 or 11 hooks between floats are widely distributed all over the South Atlantic yet the main catch appeared to be big eye tuna when fishing in tropical region and to be albacore when fishing in traditional RLL fishing areas. Based on 1968-1998 catch and effort statistics of Taiwanese long liners fishing in the South Atlantic, clustering analyses on 121 five-degree-square blocks each with a characteristic catch composition of 12 species or species group were performed. Results obtained indicate that (1) three main sub-areas, namely: Subarea 1, 2 and 3 are identified in the South Atlantic; (2) Subarea 1, which locates from 10°-15° S and northward to the northern boundary of 5° N, is characterized by its major activities were composed of DLL fishing targeting mainly for big eye tuna; (3) Subarea 2 and Subarea 3, both located southward to Subarea 1, are characterized by its major activities were composed of RLL fishing targeting mainly for albacore; and (4) contrasts in albacore's catch rates by sub-areas are significant. Further, a MRAR (Marginal Rate of Areal Regrouping) index is introduced to compare the appropriateness of area demarcation. Results of the analysis indicate that any shift of boundary between Subarea 1 and Subarea 2 will systematically and significantly decrease the MRAR index, particularly after mid-1980s when the emergence of the DLL vessels in the South Atlantic commenced.


    

本卷期目次
ACTA Oceanographica Taiwanica 40卷1期 (2002.6)
從耳石的日周輪來看歐洲鰻及美洲鰻的分離洄游機制/ 曾萬年
國立中央大學徵聘水文科學教師/ 隋中興
台灣海洋物種之標識放流試驗/ 郭慶老
中華民國海洋污染防治協會成立了!/ 陳邦富
台灣東北部卯澳灣海域九孔族群密度與現存量估計/ 李英周郭晃豪許建宗
中華民國海下技術協會簡介/ 劉倬騰
Growth of Argentine Shortfin Squid, Illex argentinus, in the Southwest Atlantic during its post-recruitment Migration/ Chih-Shin ChenMeng-Shin ShiaoTai-Sheng Chiu
新世紀海洋監測與開發技術研討會/ 邱逢琛
Estimation of Tag Loss Rate of Black Rockfish (Sebastes melanops) off Washington Coast with a Review of Double Tagging Models/ Han-Lin Lai
ADCP及河口水文動力工作坊提供新知/ 王玉懷
衛星遙測資料之推廣及心得交換/ 林依依
估計台灣地區二十噸以上漁船之漁業別近海海域漁獲量,1998/ 李英周劉錫江
陳汝勤教授獲選美國地質學會會士/ 劉康克
水產試驗所廖所長一久院士屆齡榮退/ 徐崇仁
Geographic Distribution and Area Demarcation on the Fisheries Resource of South Atlantic Albacore/ Chi-Lun WuShean-Ya Yeh
科學月刊出版「海洋與台灣」專刊/ 劉康克
Comparison on Growth Characteristics of Southern East China Sea's Lizard Fish (Saurida tumbil) Between 1970s and 1990s/ Tzong-Der TzengDing-Rong LinShean-Ya Yeh
 
   
 
   

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