Dataset: MOC1 zoop abund
Deployment: W0004B

MOCNESS-1 Plankton Abundances

Principal Investigator:

William T. Peterson (Northwest Fisheries Science Center - Newport, NOAA NWFSC)

Data Manager:

Hal Batchelder (Oregon State University, OSU-CEOAS)

BCO-DMO Data Manager:

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

Project:

U.S. GLOBEC Northeast Pacific (NEP)

Current State:

Final no updates expected

Version:

20110628

Version Date:

2011-06-28

Data URL:

https://www.bco-dmo.org/dataset-deployment/450081/data

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Description

U.S. GLOBEC Northeast Pacific California Current Program MOCNESS Plankton (MOC1) Data

Data Collections were done as part of several projects.
Contact for this dataset is:
Dr. William Peterson (bill.peterson@noaa.gov)
Phone: 541-867-0201

All inquiries about this data should be directed to Dr. Peterson.

Data Description

The MOC1 data are organized by cruise within year. The master page (Level 0) lists all of the cruises in chronological order. Clicking on a cruise will show all of the casts collected/processes from that cruise (Level 1). Clicking on a cast will bring up the Level 2 file that shows all of the samples (nets) processed from that cast. Clicking on the sample_id (ranges from "1" to "8" for this type of data) will display the Level 3 data, which are the actual taxonomic categories and abundances for that particular sample. Additional info about the variables is described below.

Program Codes	Description
LTOP	samples collected on Long-term Observation Program Cruises (ca. 4-6 cruises per year; all sample the Newport Hydrographic (NH) Line; some sample other standard lines further south)
MESO_1	samples collected from process cruise in June 2000
MESO_2	samples collected from process cruise in August 2000
MESO_3	samples collected from process cruise in June 2002

Life Stage Info Codes (partial listing)	Description
most are self-explanatory; Male, Female, CV ==> Copepodite 5, Zoea, Nauplii, N2 => Nauplius 2, Egg--a few are not, esp. for the euphausiids (Thysanoessa and Euphausia)
F2	Second Stage Furcilia (aka Furcilia 2)
F3	Third Stage Furcilia (aka Furcilia 3)
F1_0	First Stage Furcilia with 0 legs
F2_32 or Furcilia_2_3L2S	Second Stage Furcilia with 3 pairs of legs total, with 2 pairs of legs having setae; this xLyS pattern is common, with x and y varying depending on stage of development

MOCNESS Sample Analysis Protocols from "comments" field
Comment	Description
Proc_Protocol=0	(Standard Protocol): 1) Count, sex, measure, and stage all euphausiid species. 2) Count and measure Limacina pteropods 3) Count, stage, and measure both spp. of Neocalanus 4) Count and measure "Big Stuff" (large zooplankton, i.e., fish larvae, squid, octopi, jellies, other shrimp, etc...)
Proc_Protocol=1	(Euphausiids only Protocol): 1) Count, sex, measure, and stage all euphausiids.
Proc_Protocol=2	('Acoustic Calibrations' Protocol): 1) Count, sex, and measure all euphausiids (Adults and juveniles ONLY). 2) Count and measure Limacina pteropods.

Metadata last updated 29 May 2012;smr, BCO-DMO

Methods & Sampling

Dataset acquisition description

The MOCNESS is based on the Tucker Trawl principle (Tucker, 1951). The MOCNESS-1 has nine rectangular nets (1m x 1.4 m) which are opened and closed sequentially by commands through conducting cable from the surface (Wiebe et al., 1976). In MOCNESS systems, "the underwater unit sends a data frame, comprised of 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... Temperature (to approximately 0.01 deg C) and conductivity are measured with SEABIRD sensors . Normally, a modified T.S.K.-flowmeter is used... Both the temperature and conductivity sensors and the flowmeter are mounted on top of the frame so that they face horizontally when the frame is at a towing angle of 45deg... Calculations of salinity (to approximately 0.01 o/oo S), potential temperature (theta), potential density (sigma), the oblique and vertical velocities of the net, and the approximate volume filtered by each net are made after each string of data has been received by the computer." (Wiebe et al., 1985) In addition, depending on the particular configuration of the MOCNESS-1, data may have been collected from other sensors attached to the frame : (Transmissometer, Fluorometer, Downwelling light sensor, and the Oxygen sensor). A SeaBird underwater pump was also included in the sensor suite.

Data Processing Description

Dataset Processing Description

After retrieval to deck, the contents of the nets were rinsed into the codends and transferred to storage bottles, and fixed and preserved with formalin. In the shore laboratory, the contents of the bottles were subsampled and counts and biomass estimates made for selected taxa (see the Proc_Protocol info below). This data object reports only the count information.

More information about this dataset deployment

Funding

Award Number	Funding Source
unknown NEP NOAA	National Oceanic and Atmospheric Administration
unknown NEP NSF	National Science Foundation

Instruments

MOCNESS1

Supplied Description:

The MOCNESS is based on the Tucker Trawl principle (Tucker, 1951). The MOCNESS-1 has nine rectangular nets (1m x 1.4 m) which are opened and closed seq uentially by commands through conducting cable from the surface (Wiebe et al., 1976). In MOCNESS systems, "the underwater unit sends a data frame, comprised of 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... Temperatu re (to approximately 0.01 deg C) and conductivity are measured with SEABIRD sensors . Normally, a modified T.S.K.-flowmeter is used... Both the temperature and conductivity sensors and the flowmeter are mounted on top of the frame so that they face horizontally when the frame is at a towing angle of 45deg... Calculations of salinity (to approximately 0.01 o/oo S), potential temperature (theta), potential density (sigma), the oblique and vertical velocities of the net, and the approximate volume filtered by each net are made after each string of data has been received by the computer." (Wiebe et al., 1985)

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).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
year	Year	n/a	year
program	See codes in table above (in 'Data Description' section).	n/a	no_bcodmo_term
cruise_id	Cruise ID.	n/a	cruiseid
cast	Cast number within the cruise.	n/a	cast
station	Standard Station Name.	n/a	station_std
lat	Latitude.	decimal degrees	lat
lon	Longitude.	decimal degrees	lon
depth_bottom	Bottom depth at station location.	meters	depth_bottom
sample_id	The net number, ranges from 1-8.	n/a	sample
min_sample_depth	Minimum depth of a single net sample.	meters	depth_min
max_sample_depth	Maximum depth of a single net sample.	meters	depth_max
month_local	Month	n/a	month_local
day_local	Day	n/a	day_local
time_local	Local time.	n/a	time_local
d_n_flag	'DAY' or 'NIGHT' if flagged; some samples may not have been flagged.	n/a	time_of_day
gear_type	Name of instrument. ('MOCNESS' for this gear.)	n/a	instrument
gear_area_m2	Mouth area of net in square meters.	m^2	no_bcodmo_term
gear_mesh	Size of mesh of net in millimeters.	mm	no_bcodmo_term
vol_filt	Volume filtered in cubic meters.	m^3	vol_filt
counter_id	Initials of the Plankton Taxonomist.	n/a	person
comments	Misc. comments pertaining to sample. See definitions in table above (in 'Data Description' section).	n/a	comment
nodc_code	Standard NODC taxonomic code.	n/a	taxon_code
species	Genus and species (e.g., NEOCALANUS_PLUMCHRUS).	n/a	taxon
life_stage	Life Stage info (see Life Stage Codes table above in 'Data Description' section).	n/a	stage
abund	Density (individuals per cubic meter).	individuals per m^3	abundance

Database

Contribute Data

Dataset: MOC1 zoop abund
Deployment: W0004B

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: MOC1 zoop abundDeployment: W0004B

Dataset acquisition description

Dataset Processing Description

Dataset: MOC1 zoop abund
Deployment: W0004B