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題 名 | The Study of Fishing Efficiencies of Optimal Mesh on 56 mm=56 mm適正網目之漁獲性能研究 |
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作 者 | 黃燦星; 周耀烋; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 19:3 1992.09[民81.09] |
頁 次 | 頁211-221 |
分類號 | 439.3 |
關鍵詞 | 漁獲性能; 適正網目; 網目選擇性; Fishery efficiency; Mesh selectivity; |
語 文 | 英文(English) |
中文摘要 | 為瞭解網目擴大後的漁獲性能變化,及檢驗歷年來採用覆蓋網試驗的信賴度。本研究以傳統網目34mm為基準,易以56m網目之試驗袋網,自1988年八月至1989年六月間,於臺灣海峽及臺灣北部海域,進行交替網試驗。其結果摘要如下: (1)根據69種漁獲魚種之出現率,體長組成及分佈密度,將臺灣海峽及臺灣周邊水域之底魚分佈情況,分為六種型態。 (2)當網目規格大小由34mm,擴大為56mm時,主要經濟魚種之體長組成,並無明顯變化。 (3)網目規格擴大後,其漁獲量之減率,隨作業海區而異。 (4)交替網法和覆蓋網法之選擇性試驗比較,對主要漁獲魚種而言,其選擇效果並沒有太大差別。 |
英文摘要 | Tow kinds of mesh size of 34mm and 56mm on the codend were made in experimental tow alternatively in fishing area of Taiwan Strait and northern Taiwan during the period between August, 1988 and June, 1989. According to the occurrence, length compositions and densities of the 69 caught species six kinds of spatial distribution pattern were classified. Further, the length composition of economically important species was not significantly different, if the mesh size was enlarged from 34mm to 56mm. However, the total catch declined in accord with the fishing areas. Also the comparison of using covered and alternative hauling showed that the selectivity by species is almost the same. |
本系統中英文摘要資訊取自各篇刊載內容。