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題 名 | Distribution of Fish Larvae in Relation to Pycnocline in the Coastal Waters of Tan-Shui, Taiwan=淡水沿海密度鋒面與仔稚魚群分布關係之研究 |
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作 者 | 李明安; 周世欽; 李國添; 李培全; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 23:3 1996.09[民85.09] |
頁 次 | 頁195-206 |
分類號 | 439.22 |
關鍵詞 | 密度鋒面; 收斂速度; 仔稚魚; 魚探機; Pycnocline; Convergence speed; Fish larvae; Echo sounder; |
語 文 | 英文(English) |
中文摘要 | 淡水地區之流袋網漁業由來已久,但有關其仔稚魚群之分布特性研究則十分缺乏。 本研究以魚探調查及海洋斷面觀測,並透過相關法與空型態分析法,解析仔稚魚群之單群規 模、空間分布型態及其與溫鹽變動特性關係。結果顯示當水域中因不同溫鹽性質之海水交衝 而形成鋒面時,魚群之斷面分布大多集中於鋒面外緣收斂速度小於6cm/sec之區域,而水域 中沒有形成鋒面時,魚群則零星分布於整個水層。 |
英文摘要 | Four hydroacoustic surveys were conducted to study the distribution of larval fish schools and their relation to pycnocline in coastal waters of Northwestern Taiwan, July to October 1992. The convergence speed of pycnocline was as a reliable environmental factor in determing the distribution of the larvae. When the convergence speed was greater that 6 cm/sec, the density of fish larvae was low. Most of the fish schools inhabited in the areas where the convergence speed was less than 6 cm/sec. |
本系統中英文摘要資訊取自各篇刊載內容。