Dataset: tow_photos_rhb
Deployment: RHB0603

photographs of RHB0603 net collections before any picking

Scientist:

Dr Laurence P. Madin (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Technician:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI)

Project:

Census of Marine Zooplankton-2004-2010 (CMarZ_2004-2010)

Current State:

Final no updates expected

Version Date:

2010-11-19

Data URL:

https://www.bco-dmo.org/dataset-deployment/451743/data

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Description

Photographs were taken in the wet lab of the Ron Brown of the contents of each net in a tray before any animals were picked out. Larry Madin set up the system and used his own equipment. See parameter list for settings. The labels in each photo are approximately 7 x 3.5 cm, to help guage the size of the specimens in the image.

Methods & Sampling

Dataset acquisition description

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Funding

Award Number	Funding Source
unknown CMarZ_2004-2010 NOAA OEP	NOAA Ocean Exploration

Instruments

MOCNESS.25

Supplied Description:

Instrument Type

Generic Name: MOCNESS.25

Acronym: MOC.25

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0097/

Generic Description:

The Multiple Opening/Closing Net and Environmental Sensing System or MOCNESS is a family of net systems based on the Tucker Trawl principle. The MOCNESS-1/4 carries nine 1/4-m2 nets usually of 64 micrometer mesh and is used to sample the larger micro-zooplankton.

MOCNESS1

Supplied Description:

Instrument Type

Generic Name: MOCNESS1

Acronym: MOC1

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0097/

Generic Description:

The Multiple Opening/Closing Net and Environmental Sensing System or MOCNESS is a family of net systems based on the Tucker Trawl principle. The MOCNESS-1 carries nine 1-m2 nets usually of 335 micrometer mesh and is intended for use with the macrozooplankton. All nets are black to reduce contrast with the background. A motor/toggle release assembly is mounted on the top portion of the frame and stainless steel cables with swaged fittings are used to attach the net bar to the toggle release. A stepping motor in a pressure compensated case filled with oil turns the escapement crankshaft of the toggle release which sequentially releases the nets to an open then closed position on command from the surface. -- from the MOCNESS Operations Manual (1999 + 2003).

MOCNESS10

Supplied Description:

Instrument Type

Generic Name: MOCNESS10

Acronym: MOC10

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0097/

Generic Description:

The Multiple Opening/Closing Net and Environmental Sensing System (MOCNESS) is based on the Tucker Trawl principle (Tucker, 1951). The MOCNESS-10 (with 10 m^2 nets) carries 6 nets of 3.0-mm circular mesh which are opened and closed sequentially by commands through conducting cable from the surface (Wiebe et al., 1976). In this system, "the underwater unit sends a data frame, comprising temperature, depth, conductivity, net-frame angle, flow count, time, number of open net, and net opening/closing, to the deck unit in a compressed hexadecimal format every 2 seconds and from the deck unit to a microcomputer every 4 seconds" (Wiebe et al., 1985).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
net_size	Size of opening of each net on that instrument.	square meters	no_bcodmo_term
station	consecutive station number		station
tow	plankton tow number		tow
lat	Latitude. Negative = South.	decimal degrees	lat
lon	Longitude. Negative = West.	decimal degrees	lon
net	Number of the applicable net.		net
depth_range	Range each net fished. Used with MOCNESS tows.	meters	no_bcodmo_term
depth_min	Depth where net opened on the way down (net 0) and depth where the net closed on the way up. Used with MOCNESS data.	meters	no_bcodmo_term
depth_max	Depth where the net closed when net going down (net 0) and depth where net opened coming up. Used with MOCNESS data.	meters	no_bcodmo_term
comments	notes relative to the functioning of the nets during the tow.		comment
link_html	Where to find the full-sized pictures. Includes the thumbnail for a quick look.		no_bcodmo_term

Database

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Dataset: tow_photos_rhb
Deployment: RHB0603

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: tow_photos_rhbDeployment: RHB0603

Dataset acquisition description

Dataset Processing Description

Dataset: tow_photos_rhb
Deployment: RHB0603