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研究生:鄧培妤
研究生(外文):Pei-yi Teng
論文名稱:大西洋和印度洋大目鮪肌肉中總汞及有機汞濃度的研究
論文名稱(外文):Total and organic mercury concentration in the muscle of bigeye tuna (Thunnus obesus) from the Atlantic and Indian Oceans
指導教授:陳孟仙陳孟仙引用關係陳志遠
指導教授(外文):Meng-Hsien ChenChiee-Yong Chen
學位類別:碩士
校院名稱:國立中山大學
系所名稱:海洋生物科技暨資源學系研究所
學門:自然科學學門
學類:海洋科學學類
論文種類:學術論文
論文出版年:2010
畢業學年度:98
語文別:中文
論文頁數:111
中文關鍵詞:鮪釣漁業總汞濃度有機汞濃度食用安全地理差異
外文關鍵詞:long-line fisheriesgeographic differencefood safetyOrganic mercuryTotal mercury
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本研究以大西洋及印度洋大目鮪為研究對象,分析其尾柄白色肌肉中之總汞及有機汞濃度,探討其總汞及有機汞濃度與體型及年齡的相關性,並比較洋區間的差異,及評估大目鮪之食用安全性。
本研究分析大西洋及印度洋大目鮪尾柄肌肉各121尾及110尾,合計231尾樣品,全部樣品的肌肉總汞及有機汞濃度為0.786± 0.386(0.217- 0.386)及0.595± 0.238(0.143- 2.222)mg/kg 濕重。這些測值與過去文獻的測值雷同。
大西洋大目鮪總汞及有機汞濃度與尾叉長、體重及年齡皆有顯著正相關,印度洋大目鮪的總汞濃度僅與尾叉長有顯著正相關,有機汞濃度與尾叉長、體重及年齡皆有顯著正相關。大目鮪肌肉的平均總汞及有機汞濃度,以及總汞和有機汞濃度在尾叉長上的蓄積速率皆為大西洋>印度洋,推測兩洋區的大目鮪可能有不同的汞蓄積模式。
本研究中有1.7%的大西洋大目鮪超過台灣衛生署規定之甲基汞濃度限值(2 mg/kg 濕重),有13%的大西洋大目鮪以及2.7%的印度洋大目鮪超過WHO及FDA的甲基汞限值(1 mg/kg 濕重)。以平均有機汞濃度估算,國人男性(65公斤體重)及女性(55公斤體重)每周分別攝食170及145克以下的大目鮪肌肉不會有甲基汞攝入過量的健康風險。
White muscle samples of bigeye tuna, Thunnus obesus, collected in the Atlantic Ocean and the Indian Ocean were analyzed for total (THg) and organic mercury (OHg) concentrations.
A total of 231 white muscle samples showed that THg and OHg concentrations ranged from 0.217 to 0.386 (0.786 ± 0.386) and 0.143 to 2.222 (0.595 ± 0.238) mg/kg wet weight, which did not differ with other previous studies. THg and OHg were linearly correlated with fork length (cm) and body weight (kg).
The THg and OHg concentrations of 121 bigeye tuna samples collected in the Atlantic Ocean were linearly correlated with fork length, body weight and age. The OHg of 110 bigeye tuna in the Indian Ocean were linearly correlated with fork length, body weight and age, but only the the THg concentrations were linearly correlated with fork length.
The average THg and OHg concentrations of bigeye tuna from the Atlantic Ocean showed significantly higher value than those from the Indian Ocean (p< 0.05). Furthermore, the slope of the regression lines between mercury concentrations (THg and OHg) and fork length in the bigeye tuna from the Atlantic Ocean was significantly higher than those from the Indian Ocean (p< 0.05). It’s suggested that different Hg accumulation patterns exist in the two oceans.
In the Atlantic and Indian Ocean, 1.7% and 0% of the bigeye tuna, respectively, had OHg concentrations of the muscles above the authorized limit (< 2 mg/kg wet weight) set by the Department of Health, Taiwan, and 13% and 2.7%, respectively, of the levels exceeded the safety food standard (< 1 mg/kg wet weight) set by WHO and FDA. Accordingly, for adult men and women with 65 kg and 55 kg of body weight, the maximum allowable weekly intake of bigeye tuna are suggested to be 170 and 145 g, respectively.
摘要..................................................................................I
英文摘要.........................................................................II
目錄................................................................................III
表目錄...........................................................................VII
圖目錄...........................................................................IX

壹、前言
1.1 汞的來源與分布.....................................................1
1.2大目鮪肌肉汞濃度研究的重要性.........................1
1.3 大目鮪汞蓄積之研究回顧....................................3
1.4 實驗目的................................................................4

貳、材料與方法
2.1樣品來源...............................................................5
2.2 實驗用品之清潔..................................................5
2.3分析樣品之消化...................................................6
2.3.1 事前工作..........................................................6
2.3.2(Ι)有機汞萃取步驟......................................6
2.3.2(II)總汞消化分解步驟.................................7
2.3.3 標準溶液之配製..............................................8
2.4 汞元素分析.........................................................9
2.5 實驗分析之品保和品管.....................................9
2.5.1已經確認之參考樣品.......................................9
2.5.2溶劑空白組.......................................................9
2.5.3方法偵測極限值...............................................9
2.6 年齡資料............................................................10
2.7 數據處理............................................................10

參、結果
3.1 大目鮪基本生物學資料.....................................12
3.2國際參考樣品查核結果.......................................12
3.3 大目鮪之總汞及有機汞濃度...............................12
3.4 性別差異對大目鮪肌肉汞蓄積之影響..............14
3.4.1 大西洋...............................................................15
3.4.1.1汞濃度與尾叉長之關係.................................16
3.4.1.2汞濃度與體重之關係.....................................17
3.4.1.3 汞濃度與年齡之關係...................................18
3.4.2 印度洋..............................................................20
3.4.2.1 汞濃度與尾叉長之關係..............................20
3.4.2.2 汞濃度與體重之關係..................................21
3.4.2.3 汞濃度與年齡之關係....................................23
3.5肥滿度指數與其汞濃度之關係...........................24
3.6 汞濃度在地點間的差異......................................25

肆、討論
4.1大目鮪肌肉汞濃度與體型之關係......................28
4.2汞蓄積的性別差異..............................................29
4.3大目鮪肌肉汞濃度與其年齡之關係..................30
4.4大目鮪肌肉汞濃度之地點差異..........................31
4.5與其他地區大目鮪汞濃度比較..........................32
4.6 與其他大西洋及印度洋高階消費者汞濃度之比較....34
4.7 食用安全性.........................................................36

伍、參考文獻
英文部分.................................................................39
中文及軟體部分.....................................................47
表...............................................................................49
圖..............................................................................67
附錄..........................................................................97
英文部分
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中文及軟體部分
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