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相關文獻
- Examination on Recent Increase in Juvenile Catch of South Atlantic Albacore Thunnus alalunga: Observations and Implications
- 南大西洋長鰭鮪之資源豐度指標標準化
- ARIMA Modeling and Forecasting the Albacore Catch and CPUE of the Taiwanese Tuna Longline Fishery in the South Atlantic Ocean
- Stock Assessment of South Atlantic Albacore by the Nonequilibrium Production Model
- Production Model Analysis of the South Atlantic Albacore and a Monte-Carlo Sensitivity Analysis of the Effects of Data Accuracy
- Stock Assessment of Albacore, Thunnus alalunga, in the Indian Ocean by Surplus Production Models with a New Relative Abundance Index
- Geographic Distribution and Area Demarcation on the Fisheries Resource of South Atlantic Albacore
- Stock assessment of south Atlantic albacore by production model analysis, 1967-1982
- Northern Atlantic Albacore Standardized Catch per Unit Effort Trends Derived from the Catch Statistics of the Taiwanese Longline Fishery from 1968 to 2003
- Reconsideration of Assessing South Pacific Albacore Stocks(Thynnus alalunga)
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題 名 | Examination on Recent Increase in Juvenile Catch of South Atlantic Albacore Thunnus alalunga: Observations and Implications=近年來南大西洋長鰭鮪Thunnus alalunga資源量增加可能性之探討 |
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作 者 | 張水鍇; 王世斌; 葉顯椏; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 26:4 1999.12[民88.12] |
頁 次 | 頁191-201 |
分類號 | 439.24 |
關鍵詞 | 長鰭鮪; 南大西洋; 豐度; Albacore; South atlantic Ocean; Abundance; |
語 文 | 英文(English) |
中文摘要 | 本研究利用1981至1997年間台灣鮪延繩釣漁船所採獲之漁獲統計及体長資料,針 對南大西洋長鰭鮪 Thunnus alalunga 目前之資源狀況做一探討。南大洋長鰭鮪從 1981 到 1993 年間之体長組成大致上類似。 在此年間所捕獲之長鰭鮪体長範圍大約從 70 公分到 120 公分左右。 而 1994 到 1997 年間則明顯有小魚 (<70 公分 ) 出現之之情形。在所有 之年度,34 漁區之單位努力漁獲有高於、而平均漁獲体長則有低於 33 漁區之現象,在 33 漁區之單位努力漁獲從 1981 年持續的降到 1996 年,而在 34 漁區則於 1981 至 1986 年 間維持一高值、在 1987 到 1993 年間降到低值、而在 1993 年後則又回升。小魚增加之情 形不僅出現於日本傳統南方黑鮪作業漁埸內、在其漁埸外亦有類似之情形。体長須度分佈中 小魚峰度由 1995 到 1997 年之推移情形亦與南大西洋長鰭鮪小魚之平均年成相互吻合,由 這些觀察顯示南大西洋長鰭鮪資源量於最近幾年有增居之趨勢,尤其是在 34 漁區之內。本 報告針對此結果所顯示之含意及其對國際上南大西洋長鰭鮪資源管理之影響亦做一討論。 |
英文摘要 | Albacore, Thunnus alalunga, caught in the south Atlantic Ocean was examined based upon historical size and catch data collected from longline fishery between 1981 and 1997. There were no apparent changes in sixe composition in the southern stock between 1981 and 1993. Dominant size of albacore ranged from 70 to 120 cm in most years except for 1994-1997 period when large amount of small albacore (i.e., <70 cm) were evident. Adjusted catch-per-unit-effort (ACPUE) was higher while mean size of fish caught was smaller in ICCAT statistical area 34 than in 33 in all years. ACPUE devreased continuously from 1981 to 1996 in area 33, but was high in area 34 during 1981-1986 period, decreased to low values in 1987-1993, and increased again after 1993. Increases in catch of small albacore were also seen in areas within and outside Japanese Southern Bluefin Tuna fishing gound. Shift in modes of length frequency distribution for small albacore from 1995 to 1997 coincides with mean growth rate of ages 1 to 3 fish in the southern stock. This observation might suggest an increase in abundance of southern stock in recent years especially in area 34. lmplications of such an observation in relation to the management of southern stock were also discussed. |
本系統中英文摘要資訊取自各篇刊載內容。