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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/15959

Title: 1998-2007年間高雄林園沿近海漁業漁獲物平均營養位階變動之研究
The mean trophic level variation of coastal and offshore fisheries landings in Linyuan, Kaohsiung during the period of 1998-2007
Authors: Ting-Jen Chen
Contributors: NTOU:Department of Environmental Biology and Fisheries Science
Keywords: 營養位階;平均營養位階;漁獲平衡指數;林園區漁會
Trophic level;Mean trophic level;Fishing-in-balance;Linyuan Fishermans Association
Date: 2009
Issue Date: 2011-06-30T08:25:27Z
Abstract: 摘要   本研究是以漁獲交易紀錄及漁獲魚種之營養位階(TL),來評估在1998~2007年間高雄縣林園區漁會拍賣之漁獲物的平均營養位階(MTL)、漁獲魚種貢獻度(CTL)及漁獲平衡指數(FiB)的變化趨勢。此外,並結合衛星遙測表水溫度(SST)之資料,來探討漁獲量、平均營養位階(MTL)與年平均表水溫度(SST)之關係。結果顯示在1998~2007年間佔林園沿近海漁業85%漁獲比率之76種魚種可分為小型浮魚及礁區性魚類、大型洄游性魚類、底棲性及深海近底棲性魚類及無脊椎動物類等五種類群。且由CTL分析之結果顯示,本海域主要漁獲的目標魚種有13種。此外,由1998~2007年間FiB之變動顯示,本海域之FiB是以0.001的速率下降。再者,年平均SST與漁獲量之變動顯示,二者具有顯著之負相關(r=-0.83, P<0.01)。總結,林園沿近海漁業之MTL是以每年約0.01的速率下降,且由2005及2007年低營養位階魚種漁獲比例增加之現象顯示,林園沿近海漁業之資源正逐漸衰弱。 關鍵字:營養位階(TL)、平均營養位階(MTL)、漁獲平衡指數(FiB)、林園區漁會
Abstract The mean trophic level (MTL), contribute tropic level (CTL) and fishing-in-balance (FiB) were estimated by the landings data from the Linyuan Fishermans Association in Kaohsiung. The relationship between fishery landings and MTL with sea surface temperature (SST) was also studied during the period of 1998~2007. The result indicates that 85% of total catch amount can be divided into 5 fish groups and 76 species. The 5 groups include Reef-associated Small pelagics, Large pelagics, Benthopelagics, Demersals and Invertebrates. In total of 13 dominant fish species of high CTL were found from Linyuan landings during 1998~2007. In addition, the variation of FiB-index showed a decreasing trend at a rate of 0.001 per year in the periods of 1998-2007. Furthermore, the result of statistical analysis indicate that the yearly correlation between Linyuan landings and SST was negative significant (Spearman’s r=-0.83; P<0.01). To summarize the results of this study, we found that the decrease of MTL was at a rate of 0.01 trophic levels per year in Linyuan. The increasing of catch amount of low TL on landing species have been found since 2005 and 2007, respectively. Therefore, the present situation of fishery resources was weakened gradually in Linyuan. Key words: Trophic level (TL), Mean trophic level (MTL), Fishing-in-balance (FiB), Linyuan Fishermans Association
URI: http://ethesys.lib.ntou.edu.tw/cdrfb3/record/#G0T96470014
Appears in Collections:[環境生物與漁業科學學系] 博碩士論文

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