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題 名 | Monthly Variation of Larval Anchovy Fishery in Ilan Bay, NE Taiwan, with an Evaluation for Optimal Fishing Season=宜蘭灣魩仔漁業的月別變化兼論最適漁期 |
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作 者 | 丘臺生; 楊樹森; 陳志炘; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 24:4 1997.12[民86.12] |
頁 次 | 頁273-282 |
分類號 | 439.22 |
關鍵詞 | 分布; 豐度; 產量; 單價; 混獲; Distribution; Abundance; Landing; Price; Accidental catch; |
語 文 | 英文(English) |
中文摘要 | �等J漁業在臺灣沿岸漁業中具有顯著性地位,因其捕獲極小型之鯷科魚類後, 以 高單價販售而備受囑目。民國 66 年引進雙船拖網漁法於北部最主要的宜蘭灣漁場之後,爭 議迭起。民國 73 年頒布 饒漁業管理辦法,明訂每年 12 月 1 日至翌年 4 月 30 日為禁 漁期。該辦法施行接近十五年,爰有檢討之議;本文即議月別魚群分布、漁獲情形、魚產價 格及混獲情形加以討論。宜蘭灣系群主要由日本鯷、刺公鯷及異葉公鯷三種組成。由於對三 種之漁場漁法相同,在管理技術上可視為一單系群處理。該系群於四月接近灣區,五月大量 進入漁場;六、七兩月稍歉,八、九、十後再入灣區,十一月以後難覓蹤跡。漁業活動始於 四月,盛漁於五月,六、七兩月歉漁,八、九、十、三月又盛,惟十一月以後活動稀少。魚 價自四月以後持平,約 160 元╱公斤,維持至十月,但缺魚季節,價格反低。 混獲以六、 七兩月最為嚴重,幾高達三分之一;主要為七星魚、 虎、鯖及 等 30 餘種主要魚種。綜 合上述諸因,建議六、七兩月禁漁,此舉將可免混獲非標的魚種, 如鯖( Auxis sp. )及 ( Decapterus spp. )等重要經濟魚類之仔、稚魚,而得俾益該等資源。 |
英文摘要 | Larval anchovy fishery is notable in coastal fisheries because it targets small size anchovy sold in high price and may damage an important fish stock. Since 1977, when a high efficiency fishing method operated by pair- trawlers was introduced into the I-lan Bay, the harvest of this tiny fish become to elicit public criticism. In 1984, a regulation was enacted to prohibit this practice from December 1 to April 30 annually. Evaluation and review are advised after the measure has been in force for about 15 years. Based on examinations of stock distribution, abundance, landing, unit price, and accidental catch, this report attempts to elucidate some prospective views. The resource of larval anchovy in I-lan Bay is composed of the species Engraulis japonica, Encrasicholina punctifer and Encrasicholina heteroloba, which can be treated technically as a unit ("stock") since the species occur in the same fishing ground and are harvested by the same method. In general, this stock is located in the bay area, arrives by April, increases in May, temporarily decreases in June and July, is reinforced from August to October, but is very scarce after November. Fishing activities run parallel with the arrival of the stock, starting in April, operating heavily in May, decreasing in June and July , and coming back during August-October, but tapering off after November. The catch achieves an average unit price of 164 NTD/kg and maintains that price until the practice ceases annually. The percentage of accidental catch is high during June-July, reaching a level of one third the total. Based on the facts obtained from this study, it is recommended that harvest of this stock be closed during June and July. This proposal is expected to minimize accidental catch of larval scombers and scads, which can be positively protected for their later development. |
本系統中英文摘要資訊取自各篇刊載內容。