Detection and abundance estimation of euphausiids using an optical plankton counter
Detection and abundance estimation of euphausiids using an optical plankton counter
复制标题
使用光学浮游生物计数器检测磷虾并估计其丰度
DOI：
10.3354/meps094165
复制
发表时间：
1993
影响因子：
2.5
通讯作者：
D. D. sameoto
中科院分区：
文献类型：
--
作者：
W. Alex;'. erman;N.;Cochranel;D. D. sameoto
利用安装在拖曳蝙蝠鱼车上的光学浮游生物计数器(OPC)对大西洋西北部斯科特陆架翡翠盆地和拉哈雷盆地浮游生物的丰度进行了检测和估计。根据OPC测量的特征直径分布，鉴定了真甲虫(Meganyctiphane norveica和Thysanoessa inermis)。将含有真甲藻顶峰的直径分布与已知的包含这些动物的几个深度地层进行了比较。在同一航次的声学拖带上建立了含有真甲虫的深层地层，并用Bioness网络采样器对这些声层进行采样，完成了动物的识别。根据这些直径分布，还确定了真甲虫的死亡迁移模式。对安装在蝙蝠鱼和Bioness上的人造灯光的Euphausiid反应显示，丰度估计分别增加了2倍和50倍。还描述了安装在遥控车辆和摄像平台上的人造灯光的实验。根据OPC的测量，安装在一条被拖曳的蝙蝠鱼上的人造灯光导致了Euphausiid丰度估计的显著增加。来自OPC的丰度估计也与声学拖曳的结果进行了比较，结果显示两者的一致性在2倍或更好。
An optical plankton counter (OPC) mounted on a towed Batfish vehicle was used to detect and estimate the abundance of euphausiids in the Emerald and La Have Basins of the Scotian Shelf, northwest Atlantic Ocean. Euphausiids (Meganyctiphanes norvegica and Thysanoessa inermis) were identified from their characteristic diameter distributions measured by the OPC. The diameter distributions containing euphausiid peaks were compared to several depth strata known to contain these animals. The depth strata containing euphausiids were established from acoust~cal tows made on the same cruise and the identification of animals was accomplished by sampling these acoustical layers with the BIONESS net sampler. The die1 migration patterns of the euphausiids were also identified from these diameter distributions. Euphausiid reaction to artificial lights mounted on Batfish and BIONESS showed increases in abundance estimates by a factor of 2x and 50x respectively. Experiments with artificial lights mounted on a remotely operated vehicle and camera platforms are also described. An artificial light mounted on a towed Batfish resulted in a distinct increase in euphausiid abundance estimates as measured by the OPC. Abundance estimates from the OPC are also compared to results from acoustical tows and showed agreement to within a factor of 2 and better.