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台灣北部海域劍尖槍鎖管資源監測與評估研究(II) -環境因子解析

  • 日期:104-02-26
  • 計畫編號:103農科-11.2.1-水-A1(4)
  • 年度:2014
  • 領域:漁業科技研發領域
  • 主持人:張可揚
  • 研究人員:張可揚、王凱毅、陳玉姬、劉國強、廖正信、吳繼倫

本研究以廣義可增模式(Generalized additive models, GAM),探討台灣北部海域劍尖槍鎖管(Uroteuthis edulis)漁業單位努力漁獲量(CPUE)與時間因子(年別、月別、農曆日別)、空間因子(經度、緯度、海底深度)、漁船性能因子(船噸數、總主機馬力、集魚燈光強度)及環境因子(海水表面溫度、葉綠素a)間的相對關係。結果顯示時間因子、地理因子、漁船性能因子均對鎖管CPUE有顯著的影響,唯獨海洋環境因子(SST、Chl-a)對鎖管漁業之CPUE無顯著影響。CPUE除有年間變動外,以每年的9月,農曆初六,北緯26到27度,東經124到125度,水深125公尺,船噸數125噸,總馬力1500匹馬力,配備50萬千瓦之漁船等因素下,可能會有高的CPUE。

研究報告摘要(英)


In this study, we used Generalized additive models (GAM) to explore the relationship between the catch per unit effort (CPUE) of swordtip squid (Uroteuthis edulis) fishery in northern Taiwan and environmental factors, included temporal factors (year, month, lunar day), the spatial factors (longitude, latitude, seabed depth), fishing performance factors (ship tonnage, the total horsepower, light intensity) and ocean environmental factors (sea surface temperature, chlorophyll a). The results show that the temporal factors, the spatial factors, and fishing performance factors affected CPUE of swordtip squid. However, the ocean environmental factors were no significant with CPUE of swordtip squid. In addition to changes in CPUE between years, each year in September, sixth in lunar calendar, in latitude 26-27°N, longitude 124-125°E, the depth of 125 meters, the ship tonnage of 125 tons, the total horsepower 1500 horsepower, and 500,000 kilowatts under the fishing boats, there may be a high CPUE.