農業部-水產試驗所全球資訊網農業部-水產試驗所全球資訊網

本研究利用水試一號研究船於2007年5、7與10月及2008年1與3 月完成台灣周邊海域聲波遙測(38kHz)及浮游動物資料之蒐集，並完成各航次資料處理及分析。浮游動物平均生物量(mean biomass, MB)於夏季達最高、冬季達最低，其變動趨勢大致由冬季至夏季期間呈上升趨勢，夏季至冬季期間則呈下降趨勢。各調查航次浮游動物平均生物量依序為118.1±77.7 ( ind./1000m^3)，122.8±100.6 ( ind./1000m^3) ，105±125.8 ( ind./1000m^3) ，73.2±59.9 ( ind./1000m^3) ，116.5±86.4 ( ind./1000m^3)。38kHz科學魚探於海水表面至海底或200m深度之平均體積散亂反射強度(volume backscatting strength, SV) 依序為-65.4±6.5 dB (mean±SE)，-67.2±5.2 dB，-71.1±6.7 dB，-70.8.2±6.3 dB，-66.5±5.1 dB。本研究五個調查航次浮游動物生物量之對數值與體積散亂反射強度之迴歸方程式為Ln(MB)=0.092SV+3.72 (R=0.74, P<0.0001)，且各調查航次浮游動物平均生物量之對數值與38kHz科學魚探之體積散亂反射強度之相關性分析結果均呈顯著相關，因此，38kHz科學魚探運用於台灣周邊海域浮游動物生物量之估計是可行的。

In this study, zooplankton sample and the data of acoustic remote sensing of 38 kHz in the surrounding waters of Taiwan were collected on board Fishery Research I in May, July, October 2007 and January, March 2008. The mean biomass of zooplank in this study area showed increasingly from winter to summer and then decreasingly. The mean biomass of zooplankton in this 5 survey cruises were 118.1±77.7 ( ind./1000m^3)，122.8±100.6 ( ind./1000m^3) ，105±125.8 ( ind./1000m^3) ，73.2±59.9 ( ind./1000m^3) and 116.5±86.4 ( ind./1000m^3) in turn. The mean volume backscatting strength in the layer from near surface (7m) to near seabed or 200m (if water depth more than 200m) were -65.4±6.5 dB (mean±SE)，-67.2±5.2 dB，-71.1±6.7 dB，-70.8.2±6.3 dB，-66.5±5.1 dB in proper order. It showed significantly correlation between the zooplankton biomass and the mean volume backscatting strength, and the regression formula was Ln(MB)=0.092SV+3.72 (R=0.74, P<0.0001). The result of this study showed studies on the zooplankton biomass in the surrounding waters of Taiwan would be feasible by using the acoustic remote sensing of 38 kHz.