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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25681

Title: 台灣東部海域翻車魚資源變動及洄游路徑研究
Authors: 張永州;劉光明;莊守正
Contributors: NTOU:Department of Environmental Biology and Fisheries Science
國立臺灣海洋大學:環境生物與漁業科學學系
Date: 2006
Issue Date: 2011-10-20T08:25:00Z
Publisher: 漁業資源評估管理及利用研討會
Abstract: 2003年開始進行翻車魚(ocean sunfish)的調查與研究,今年6月第一篇關於矛尾翻車魨(Masturus lanceolatus)的年齡與成長的碩士論文完成(李,2007),讓我們對矛尾翻車魨的世界開了一扇窗。2005年10月27日及2006年11月8日分別完成一尾矛尾翻車魨衛星標識的工作,2007年12月11日下午在七星潭嘉豐定置漁場完成第三尾標識放流,預定於2008年3月31日脫落。今年度的研究工作重點,除基本的漁獲資料收集與分析外,也開始收集矛尾翻車魨生殖腺以進行生殖特性的研究。2007年花蓮地區定置網矛尾翻車魨的漁獲量為2,894尾,總重296,080公斤,個體平均重量102.31(公斤/尾)。今年6月以後的矛尾翻車魨的漁獲量並不理想,除了7、8月休漁的時間外,9-11月的漁獲量並不如預期。2003年至2007年漁獲物年齡組成的變化情形,可看出每年的漁獲個體以4-11齡的矛尾翻車魨為大宗、15-16齡的個體是次要的漁獲對象、再其次則是19齡的個體。 研究結果推測矛尾翻車魨雄魚之成熟體長應在標準體長120公分以上,也表示雄魚約要成長至9齡魚以上才可能達性成熟。雌魚標準體長135公分左右(約11-14齡),其生殖腺才開始有發育的情形。其繁殖季節可能在5-6月之間,東部海域所捕獲的個體,不論雌雄皆未發現生殖腺成熟的個體,唯一例外是出現在4月,標準體長175公分的雌魚,約為20-21齡的個體。相信若干年後,對於矛尾翻車魨的年齡成長、生殖生物學、洄游路徑及資源變動問題,將會更深入的理解,並可擬定更實際的資源經營管理對策。
Study and survey of ocean sunfish began in 2003. The first thesis that studied in age and growth of Masturus lanceolatus is finished in Jane 2007(Li, 2007). We had tagged two fishes in 27 October 2005 and 8 November 2007 at offshore of Hualien respectively. More one fish was tagged in 11 December 2007 at the same place. The tag will be released in 31 March 2008. We are continuing to collect and analysis the fishy data and in additional beginning study of reproductive in sharptail mola by collecting ovary and testis in this year.
The total numbers of catch in sharptail mola are 2,894 and weight 296,080 kilogram and average weight per fish is 102.31(kg) by set net in 2007.
The condition of catch was not good. The set net rested in July and August. The catches do not similar to passed years from September to November in this year. The age range from 4 to 11 are the most important target fishes, the next are from 15 to 16, the third are age 19.
We calculate that the age of maturity of male sharptail mola should more than 120(cm) in standard length, older than age 9. The ovary does not develop until the standard length less than 135(cm), about age 11 to 14. We think that the breeding season should be from May to Jane. All of catches are not maturity in the east waters of Taiwan except only one. The fish was female and 175(cm) in standard length, age 20 to 21.
Believe it will come true. When this study, age and growth, reproduction, migration route, variation of population, has been finished, we can make a practical management strategy in the future.
URI: http://ntour.ntou.edu.tw/handle/987654321/25681
Appears in Collections:[環境生物與漁業科學學系] 演講及研討會

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