頁籤選單縮合
題 名 | Fishing Efficiency of the Taiwanese Offshore Tuna Longline Fishery=臺灣近海鮪延繩釣漁獲效能之研究 |
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作 者 | 石念祖; 黃淩; 蔡怡卉; 倪怡訓; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 36:1 2009.03[民98.03] |
頁 次 | 頁77-89 |
分類號 | 439.23 |
關鍵詞 | 臺灣近海; 鮪類; 延繩釣; 漁獲性能; 漁港; Taiwan offshore; Tunas; Longline; Fishing efficiency; Harbors; |
語 文 | 英文(English) |
中文摘要 | 近海鮪延繩釣為台灣重要的漁業項目之一,了解鮪延繩釣的漁獲效率可作為日後漁業管理的參考依據。本研究於1998年11月29日至2003年6月15日期間,訪查南方澳、東港、新港三大主要鮪延繩釣基地之42艘標本船,研究結果顯示三漁港之標本船的作業地點顯著不同,春夏均以台灣東部海域為主要漁場,秋冬則大多轉至南中國海一帶作業。南方澳及新港的標本船大多釣獲非目標魚種之鬼頭刀,東港則是釣獲目標魚種之黃鰭鮪最多。漁船噸數愈大則最大航行距離也隨之增加,雖然漁船噸數愈大對於目標魚種之釣獲率下降,但在平均釣獲重量上則是呈現逐漸增加的趨勢。日夜投繩對於目標魚種的釣獲率並沒有顯著差異,但對於非目標魚種的釣獲率則有顯著差異。使用皮刀魚作為餌料在黃鰭鮪、黑皮旗魚、白肉旗魚、雨傘旗魚及鬼頭刀的釣獲成效最好,黑鮪則以虱目魚作餌的釣獲率最高,鯖魚餌則有助於捕獲鯊魚,使用烏賊作為餌料則在鮪魚類有較高的釣獲率。 |
英文摘要 | Tuna longlining is an important Taiwanese offshore fishery. Knowledge of longlining fishing efficiency is essential for providing fisheries management options. A total of 42 sampling vessels were selected from Nanfangao, Donggang, and Xingang fishing harbors during 29 November 1998 to 15 June 2003. The longlining fishing grounds was significantly different among the three harbors. The eastern waters off Taiwan were the major fishing ground during spring and summer, longliners then transferred to the South China Sea during autumn and winter. If all captures were categorized into tuna/tuna-like and non-tuna species, longliners from Nanfangao and Xingang caught mostly non-tuna dolphinfish whereas Donggang longliners caught mainly yellowfin tuna. There was a positive correlation between vessel tonnages and the longest distance of fishing. Larger longliners would catch larger tuna/tuna-like species with lower catch rate. There was no significant difference of the catch rate between the daytime and nighttime setting for tuna/tuna-like species, but it had significant difference for non-tuna species. The moonfish was the best baits in catching yellowfin tuna, blue marlin, black marlin, sailfish and dolphinfish. The milkfish was useful to catch bluefin tuna. Using mackerels as baits might be more effective in catching sharks or squid as baits would obtain better catch rates for tunas. |
本系統中英文摘要資訊取自各篇刊載內容。