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題 名 | Comparison of Ichthyoplankton Assemblages with Hydrographic Condition Across the Northern Margin of the Taiwan Strait as the Monsoon Interim=臺灣海峽季風間期比較浮游魚類群集與水文狀態之關係 |
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作 者 | 丘臺生; 謝志豪; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 28:3 2001.09[民90.09] |
頁 次 | 頁163-175 |
分類號 | 387.105 |
關鍵詞 | 水團; 浮游魚類; 密度; 豐度; 物種組成; Water masses; Ichthyoplankton; Abundance; Species composition; |
語 文 | 英文(English) |
中文摘要 | 本文報導臺灣海峽亞北端,東北季風將起與將歇時浮游魚類集合與水文狀態之關係。經由溫度及鹽度分布之圖形分析,海水取自馬祖到淡水附近之一條穿越線上者,兩個風間期(約在三及十一月)可被區分為兩個主要水團,即大陸沿水(CCW)及類黑潮水(KrW)。大陸沿岸水呈直分層之現象,而類黑潮水則直混合均勻。此典型海水位於穿越線之兩端,其間之海水受兩端海水勢力消長所影響,因此定義為鋒區。鋒區之界定視情況而定,可由溫鹽圖及溫鹽剖面圖來推斷。測站別之浮游魚類組成,依主成分分析之結果,大致上亦區分靈福建沿岸水域,及北臺灣水域,以與CCW及KrW水團相互對應。將浮游魚類依出現與否之情形以聚類分析法歸類為近岸水域、鋒區及西北臺灣水域亦可與大陸沿岸水、鋒區水及類黑潮水相對應。 東北季風將起時之十一月,較高密度之仔魚出現在福建沿岸,但在季風將歇之三月時則出現在海峽東側。本次實驗共捕得1177尾仔魚,鑑定為27科41種。兩個間期之之魚種組成並不相同。東北季風將起時,主要為海鰗鰍(Bregmaceros nectbanus)出現在福建沿岸,而少量異葉公鯷(Encrasicholina heteroloba)出現在北臺灣。在東北季風將歇之時,花腹鯖(Scomber japonicus)及印度牛尾魚(Platycephalus indicus)出現在福建沿岸,七星魚(Benthosema pterotum)在北臺灣,而日本鯷(Engraulis japonicus)集中在鋒區。東北季風終了,在海峽西部發展為一高螢光值區,不過高密度仔魚及浮游魚類並不對應發生在此區。 |
英文摘要 | Distribution of ichthyoplankton assemblages in the northern margin of the Taiwan Strait was investigated in concert with the properties of water masses. By diagrammatic analysis of the temperature and salinity distribution, the waters along a transect ling from Matzu to Tamshui could be categorized as two typical waters of China coast (CCW) and the Kuroshio related (KrW). The water situated between the two typical members was frequently identified as frontal zone. The CCW was shown vertically stratified, but the KrW mixed well with uniform temperature and salinity profiles. Principal component analysis of station-specific ichthyoplankton composition also exhibited distinctive groups of Fukien coast, frontal and northern Taiwan, in accordance with the waters of CCW, frontal and KrW. Low density of fish eggs occurred during onset of northeastern (NE) monsoon, in contrast to that at the end of NE monsoon when fish eggs concentrated in the eastern part of Taiwan Strait. The water mass with higher density of fish larvae located in the vicinity of Fukien coast as onset of NE monsoon, and this shifts toward the eastern part of Strait when the monsoon came to an end. In total, 1177 fish larvae collected were classified into at least 41 species and 27 families. Species composition differs between those two monsoon interims. At the commencement of monsoon period, Bregmaceros nectbanus was found predominately along the Fukien coast and the frontal zone, and Encrasicholina heteroloba in northern Taiwan. At the end of monsoon, Scomber japonicus and Platycephalus indicus become overwhelmingly in the Fukien coast, Benthosema pterotum in northern Taiwan, and Engraulis japonicus in the frontal zone. On the western side of the Strait, a lens of higher fluorescence value was developed at the end of NE monsoon, but neither zooplankton nor fish aggregations found correspondingly. |
本系統中英文摘要資訊取自各篇刊載內容。