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臺灣北部水域經濟性頭足類物種之分布與環境因子影響

  • 出版日期:108-06-30
  • 標題title(英):
    Distribution Patterns of Cephalopods and Effects of Oceanographic Factors off Northern Taiwan
  • 作者:陳瑞谷‧王凱毅‧陳威克‧莊世昌‧張可揚
  • 作者auther(英):Ruei-Gu Chen, Kae-Yih Wang, Wei-Ke Chen, Shih-Chang Chuang and Ke-Yang Chang
  • 卷別:27
  • 期別:1
  • 頁碼:1-12

臺灣周邊水域之頭足類研究多以生物學相關課題為主,較少探查物種分布與水文性質之關係。本研究使用水試一號試驗船以底拖網捕獲之頭足類物種組成,應用冗餘分析與泛線性模式探察其空間分布與水文參數之關係。結果顯示杜氏槍鎖管 (Uroteuthis duvauceli)、曲針烏賊 (Sepia recurvirostra) 與唇瓣烏賊 (Sepia lycidas) 三物種主要出現在底層密度較低水域,屬於臺灣海峽群,而劍尖槍鎖管 (U. edulis) 出現在底層密度較高水域,屬於東海陸棚群,可知頭足類物種之分布可能與特定水文環境有關。本研究結果建議底層海水之密度與鹽度,可能為影響頭足類物種分布之關鍵因子。由水文參數等值線圖顯示,臺灣北部水域同時受臺灣海峽水團與東海陸棚水團作用,分析水團交會位置可用以推論頭足類物種之分布,將有助於預測潛在漁場位置及改善資源量評估之應用。

摘要abstract(英)


Most studies on the cephalopods of Taiwan have focused on population biology, while studies regarding distribution patterns and oceanographic influences have been limited. This study applied redundancy analysis and a generalized linear model to investigate the relationship between the oceanographic factors and spatial distributions of cephalopod species captured using bottom trawling by the Fishery Researcher 1 in October 2012 off northern Taiwan. The results showed that the cephalopod species distributions were associated with distinct oceanographic conditions. Three species, Uroteuthis duvauceli, Sepia recurvirostra, and Sepia lycidas, were distributed in the low-density bottom waters around the Taiwan Strait, while U. edulis was distributed in the high-density bottom waters around the southern East China Sea. This study suggested that the density and salinity of bottom water might be the key factors affecting the distribution of cephalopod species. A contour map of the hydrological parameters showed that the northern Taiwan waters were influenced by the waters from the Taiwan Strait and the southern East China Sea. Therefore, the distributions of cephalopod species could be located by determining the point where water masses meet. Such data could be used to locate potential fishing grounds and be applied to stock assessment.