The next generation of Optical Plankton Counter: the Laser-OPC

doi:10.1093/plankt/fbh095

	The next generation of Optical Plankton Counter: the Laser-OPC
	Herman, AW; Beanlands, B; Phillips, EF
刊名	JOURNAL OF PLANKTON RESEARCH
	2004-10
卷号	26 期号:10 页码:1135-1145
ISSN号	0142-7873
DOI	10.1093/plankt/fbh095
英文摘要	Optical Plankton Counters (OPCs) have been in operation for similar to12 years and while there have been considerable research studies by the user community, some operational issues have emerged over this time, such as its operational limitations in high densities, the lack of accompanying flow measurements and other measurement limitations. Reported here is the next generation of this device, the Laser-Optical Plankton Counter or LOPC which was designed at the Bedford Institute of Oceanography to address the future needs of optical plankton counting. Using a narrow laser beam and new sampling geometry, the LOPC is now capable of working in plankton densities of 10(6) m(-3), nearly 100 times greater than its predecessor, the OPC, and is also capable of providing shape profiles of plankton >1.5 mm. Other new features include (i) the measurement of flow speeds through the sampling tunnel by making statistical estimates of the particle time-of-transit, (ii) a lower detection limit of 100 mum, (iii) high speed towing up to 8 m s(-1), and (iv) overall smaller physical size relative to the OPC. Data are presented from an LOPC mounted on the inside of a 0.5 m plankton net (75 mum mesh size) showing linear correlation between net samples (e.g. counts of copepod eggs, nauplii) and LOPC counts. The LOPC-measured shape profiles from the same LOPC/net tows clearly show copepods and appendages and, in some cases, euphausiids. By increasing the tunnel width relative to the original OPC, the volume sampled by the LOPC can be increased by 5x. Other towing platforms that have been tested to date are the Batfish vehicle towed at 8 knots and the Moving Vessel Profiler (MVP) towed at 12-14 knots.
WOS关键词	CALIFORNIA CURRENT ; ZOOPLANKTON ; CALIBRATION ; ABUNDANCE ; DYNAMICS ; WATER
WOS研究方向	Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000224078700001
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26468]
专题	自然资源部第一海洋研究所
通讯作者	Herman, AW
作者单位	Fisheries & Oceans Canada, Bedford Inst Oceanog, Dartmouth, NS B2Y 4A2, Canada
推荐引用方式 GB/T 7714	Herman, AW,Beanlands, B,Phillips, EF. The next generation of Optical Plankton Counter: the Laser-OPC[J]. JOURNAL OF PLANKTON RESEARCH,2004,26(10):1135-1145.
APA	Herman, AW,Beanlands, B,&Phillips, EF.(2004).The next generation of Optical Plankton Counter: the Laser-OPC.JOURNAL OF PLANKTON RESEARCH,26(10),1135-1145.
MLA	Herman, AW,et al."The next generation of Optical Plankton Counter: the Laser-OPC".JOURNAL OF PLANKTON RESEARCH 26.10(2004):1135-1145.