臺灣海峽南部中國槍鎖管豐度與海表溫度異常之關係

Abstract

中國槍鎖管 (Uroteuthis chinensis) 是臺灣海峽火誘網漁業目標物種之一，過去對該物種的生物學及資源評估已多有研究，然而了解中國槍鎖管棲地的環境因子變化對其資源的影響係有助於以生態系為基礎的漁業管理。本研究利用2005 ~ 2012年衛星遙測資料，研究臺灣海峽年間與季節間海表溫度 (sea surface temperature, SST) 異常與湧昇面積消長變化對中國槍鎖管單位努力漁獲量 (catch per unit effort, CPUE) 之影響。結果顯示2005 ~ 2009年間，臺灣海峽海表溫度出現相對高溫，顯示此時湧昇面積相對較小且CPUE較低，而2010 ~ 2012年間，臺灣海峽SST則呈現相對低溫，顯示此時湧昇面積相對較大且CPUE較高。Uroteuthis chinensis is one of the main target species of the torch-light fishery in the Taiwan Strait. In the past, several studies on biology and stock assessment have been conducted. Understanding the influences of U. chinensis habitat environmental variations on the U. chinensis stock are crucial for ecosystem-based fishery management. The interannual and seasonal variations in sea surface temperature anomalies and the upwelling area in the Taiwan Strait were studied using remote satellite data collected from 2005 to 2012. The results showed that the sea surface temperature (SST) was relatively high in the Taiwan Strait from 2005 to 2009, and also revealed a smaller upwelling area and a lower CPUE for U. chinensis during this period. Moreover, the SST was relatively low in the Taiwan Strait from 2010 to 2012, while the upwelling area was simultaneously larger and the CPUE was higher.