Dataset: Copepod abundance - MOCNESS

Name: Copepod species abundances from MOCNESS tows from R/V Thomas G. Thompson and R/V Malcolm Baldridge cruises in the Arabian Sea from 1994-1995 (Arabian Sea project, Arabian Sea Diapausing Copepods project)
Published: 2016-05-04
Keywords: biota, oceans

Cite This Dataset

Spatial Extent: N:23.167 E:78.535 S:4.999 W:49.082

Project:

Life Cycles of Diapausing Copepods in the Arabian Sea: cues for sinking at the end of the SW Monsoon ( Arabian Sea Diapausing Copepods)

U.S. JGOFS Arabian Sea (Arabian Sea)

Program:

U.S. Joint Global Ocean Flux Study (U.S. JGOFS)

Principal Investigator:

Sharon L. Smith (University of Miami Rosenstiel School of Marine and Atmospheric Science, UM-RSMAS)

Co-Principal Investigator:

Dr Peter B. Ortner (University of Miami Rosenstiel School of Marine and Atmospheric Science, UM-RSMAS)

Michael R. Roman (University of Maryland Center for Environmental Science, UMCES/HPL)

BCO-DMO Data Manager:

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

Version:

Version Date:

2016-05-04

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Copepod species abundances from MOCNESS tows from R/V Thomas G. Thompson and R/V Malcolm Baldridge cruises in the Arabian Sea from 1994-1995 (Arabian Sea project, Arabian Sea Diapausing Copepods project)

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Description

Copepods were identified, staged, and enumerated several JGOFS and GLOBEC cruises in the Arabian Sea between 1994 and 1995.

Relevant References:

Drapun, I. and S.L. Smith. 2011. Halocyprid Ostracods of the Arabian Sea Region. Sultan Qaboos University Academic Publication Board, Sultan Qaboos University, Muscat, Sultanate of Oman, 223pp.

Lane, P.V.Z. and S.L. Smith. 1997. United States Joint Global Ocean Flux Study (U.S. JGOFS) Technical Report: Zooplankton biomass in the upper water column of the Arabian Sea in 1994 and 1995. RSMAS Technical Report 97007, Rosenstiel School of Marine and Atmospheric Science, University of Miami Press, Miami, FL, 23pp.

Lane, P.V.Z., S.L. Smith, J. Zaragoza, I. Prusova and M. Roman. 1998. United States Joint Global Ocean Flux Study (U.S. JGOFS) Technical Report: Copepod taxonomy, abundance and biomass in the upper 300 meters of t he Arabian Sea during the Southwest Monsoon (August/September) of 1995. RSMAS Technical Report 98007, Rosenstiel School of Marine and Atmospheric Science, University of Miami Press, Miami, FL, 409pp.

Lane, P.V.Z., S.L. Smith, J. Zaragoza and I. Prusova. 1999. United States Joint Global Ocean Flux Study (U.S. JGOFS) Technical Report: Copepod taxonomy, abundance and biomass in the upper 300 meters of the Arabian Sea during the Northeast Monsoon (December) of 1995. RSMAS Technical Report 99004, Rosenstiel School of Marin eand Atmospheric Science, University of Miami Press, Miami, FL, 306pp.

Prusova, I., S.L. Smith, and E. Popova. 2011. Calanoid Copepods of the Arabian Sea Region. Sultan Qaboos University Academic Publication Board, Sultan Qaboos University, Muscat, Sultanate of Oman, 240pp.

Roman, M., S. Smith, K. Wishner, X. Zhang and M. Gowing. 2000. Mesozooplankton production and grazing in the Arabian Sea. Deep-Sea Research II, 47, 1423-1450.

Smith, S.L., L.A. Codispoti, J.M. Morrison and R.T. Barber. 1998. The 1994-1996 Arabian Sea Expedition: an integrated, interdisciplinary investigation of the response of the northwestern Indian Ocean to monsoonal forcing. Deep-Sea Research II, 45, 1905-1916.

Smith, S.L., M. Roman, I Prusova, K. Wishner, M. Gowing, L.A. Codispoti, R. Barber, J. Marra and C. Flagg. 1998. Seasonal response of zooplankton to monsoonal reversals in the Arabian Sea. Deep-Sea Research, 45 (10-11), 2369-2403. doi:10.1016/S0967-0645(98)00075-7

Wiebe, P.H., K.H. Burt, S.H. Boyd and A.W. Morton. 1976. A multiple opening-closing net and envirometal sensing system for sampling zooplankton. Journal of Marine Research, 34, 312-326.

Wiebe, P.H., A.W. Morton, A.M. Bradley, J.E. Craddock, T.J. Cowles, V.A. Barber, R.H. Backus and G.R. Flierl. 1985. New developments in the MOCNESS, an apparatus for sampling zooplankton and micronekton. Marine Biology, 87, 313-323.

Methods & Sampling

Please see the linked pdf's for information on the type of MOCNESS system used to sample and details on the collection and processing:

TN039
TN043
TN045
TN050
TN054
MB95-03
MB95-06

Data Processing Description

Data Processing:

Any species with a number per cubic meter abundance less than 0.05 were marked with a 'p' in the abundance column to indicate its presence in the sample. Counts were first adjusted from subsample numbers to total numbers for the entire sample; total numbers were then divided by total volume filtered in cubic meters to arrive at numbers per cubic meter for each species or taxon.

BCO-DMO Processing:

- added top level header to serve data from all cruises as one dataset
- renamed column names (parameter names) to BCO-DMO standard
- replaced spaces in species names with underscores

version 2014-04-15 included data from TT050 and TT054
version 2014-05-27 added data from TT039
version 2014-12-31 added data from MN95-03 and MN95-06
version 2015-01-05 added TT043 and TT045
version 2016-05-04 corrected event and date for MB95-03/MB95-03_MOC1-33

Data Files

File
copepod_MOC.csv (Comma Separated Values (.csv), 4.90 MB) MD5:71035badfdfef330c69b08eac11798e9 Primary data file for dataset ID 511656

More Information about this dataset

Funding Sources

Funding Source	Award Number
Office of Naval Research	N00014-95-10042
NSF Division of Ocean Sciences	OCE-9310577
NSF Division of Ocean Sciences	OCE-9310599
NSF Division of Ocean Sciences	OCE-1259255
NSF Division of Ocean Sciences	OCE-9911494
NSF Division of Ocean Sciences	OCE-0825598

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
MB95-03		1995-04-27	R/V Malcolm Baldridge	Dr Peter B. Ortner (Chief Scientist) Sharon L. Smith (Scientist)	data info
MB95-06		1995-07-31	R/V Malcolm Baldridge	Dr Peter B. Ortner (Scientist) Sharon L. Smith (Scientist)	data info
TT039	TTN039 TN39 TTN-039	1994-09-18	R/V Thomas G. Thompson	Dr Louis A. Codispoti (Chief Scientist)	data info
TT043	TTN043 TN043 TTN-043	1995-01-08	R/V Thomas G. Thompson	Michael R. Roman (Chief Scientist)	data info
TT045	TTN045 TN045 TTN-045	1995-03-14	R/V Thomas G. Thompson	John F. Marra (Chief Scientist)	data info
TT050	TTN050 TN050 TTN-050	1995-08-18	R/V Thomas G. Thompson	Sharon L. Smith (Chief Scientist)	data info
TT054	TTN054 TN054 TTN-054	1995-11-30	R/V Thomas G. Thompson	Wilford D. Gardner (Chief Scientist)	data info

Instruments

Folsom Plankton Splitter

Supplied Name: Folsom Splitter

Supplied Description:

Instrument Type

Generic Name: Folsom Plankton Splitter

Acronym: Folsom Splitter

Generic Description:

A Folsom Plankton Splitter is used for sub-sampling of plankton and ichthyoplankton samples.

MOCNESS-1D

Supplied Name: Double MOCNESS

Supplied Description:

The double MOCNESS is configured like two 1m2 MOCNESS systems attached side-by-side and carries twenty nets (Wiebe et al., 1985). The MOCNESS is designed to fish with a 1m2 net mouth area when towed at a 45o angle (Wiebe et al., 1976). A flow meter mounted on the frame, just ahead of the net mouth, allowed calculation of the volume of water sampled (Wiebe et al., 1976; 1985). The data-acquisition software used angle information when calculating volume of water filtered. The double MOCNESS was fitted with 153um mesh nets and included, in addition to the standard conductivity (Sea-Bird SBE4) and temperature (Sea-Bird SBE 3) sensors, a transmissometer (SeaTech, 25cm beam) and an oxygen probe (Sea-Bird SBE 13). The double MOCNESS was towed behind the ship at a speed of 1.5 to 2 knots (2.8-3.7 km h-1) through the water. Winch speed generally ranged from 10 to 25m min-1 during deployment and 5 to 15m min-1 during recovery. Target sampling depths for this report were 300-250m, 250-200m, 200-150m, 150-100m, 100-75m, 75-50m, 50-25m and 25m to surface.

Instrument Type

Generic Name: MOCNESS-1D

Acronym: MOC1D

Generic Description:

The Double MOCNESS 1D carries 20 1m2 nets usually of mesh size 335micron and is designed to collect macrozooplankton.

This MOCNESS system uses the same underwater and shipboard electronic system for operation and data acquisition as other MOCNESS systems. The nets are opened and closed sequentially by commands transmitted from the surface deck unit through a single conducting cable to the underwater unit. The command circuit has a provision to permit commands to be sent to either the left of right set of nets when using the double MOCNESS-1D. - from Wiebe et al, 1985.

MOCNESS.25

Supplied Name: Baby MOC, MOC-1/4

Supplied Description:

Mesozooplankton (> 64 µm) were collected from tows with a 0.25 m^2-mouth area MOCNESS equipped with nine nets with a 7:1, mouth:length ratio (Wiebe et al., 1985).

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 Name: 1m2 MOCNESS system

Supplied Description:

The 1m2 MOCNESS system carries nine nets and is designed to fish with a 1m2 net mouth area when towed at a 45o angle (Wiebe et al., 1976). A flow meter mounted on the frame, just ahead of the net mouth, allowed calculation of the volume of water sampled (Wiebe et al., 1976). The data-acquisition software used angle information when calculating volume of water filtered. The 1m2 MOCNESS was fitted with 153um mesh nets and included, in addition to the standard conductivity (Sea-Bird SBE 4) and temperature (Sea-Bird SBE 3) sensors, a transmissometer (SeaTech, 25cm beam) and an oxygen probe (Sea-Bird SBE 13). The 1m2 MOCNESS was towed behind the ship at a speed of 1.5 to 2 knots (2.8-3.7 km h-1) through the water. Winch speed generally ranged from 10 to 25 m min-1 during deployment and 5 to 15 m min-1 during recovery. Target sampling depths for this report were 1000-750m, 750-500m, 500-250m, 250-200m, 200-150m, 150-100m, 100-50m, and 50-surface.

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).

Oxygen Sensor

Supplied Name: oxygen probe

Supplied Description:

Sea-Bird SBE 13

Instrument Type

Generic Name: Oxygen Sensor

Acronym: Dissolved Oxygen Sensor

Generic Description:

An electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed

Sea Tech Transmissometer

Supplied Description:

25cm beam

Instrument Type

Generic Name: Sea Tech Transmissometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0003/

Generic Description:

The Sea Tech Transmissometer can be deployed in either moored or profiling mode to estimate the concentration of suspended or particulate matter in seawater. The transmissometer measures the beam attenuation coefficient in the red spectral band (660 nm) of the laser lightsource over the instrument's path-length (e.g. 20 or 25 cm). This instrument designation is used when specific make and model are not known. The Sea Tech Transmissometer was manufactured by Sea Tech, Inc. (Corvalis, OR, USA).

Sea-Bird SBE-3 Temperature Sensor

Supplied Name: SBE-3 Temperature

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE-3 Temperature Sensor

Acronym: SBE-3 Temperature

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/134/

Generic Description:

The SBE-3 is a slow response, frequency output temperature sensor manufactured by Sea-Bird Electronics, Inc. (Bellevue, Washington, USA). It has an initial accuracy of +/- 0.001 degrees Celsius with a stability of +/- 0.002 degrees Celsius per year and measures seawater temperature in the range of -5.0 to +35 degrees Celsius. more information from Sea-Bird Electronics

Sea-Bird SBE-4 Conductivity Sensor

Supplied Name: SBE-4 Conductivity

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE-4 Conductivity Sensor

Acronym: SBE-4 Conductivity

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0417/

Generic Description:

The Sea-Bird SBE-4 conductivity sensor is a modular, self-contained instrument that measures conductivity from 0 to 7 Siemens/meter. The sensors (Version 2; S/N 2000 and higher) have electrically isolated power circuits and optically coupled outputs to eliminate any possibility of noise and corrosion caused by ground loops. The sensing element is a cylindrical, flow-through, borosilicate glass cell with three internal platinum electrodes. Because the outer electrodes are connected together, electric fields are confined inside the cell, making the measured resistance (and instrument calibration) independent of calibration bath size or proximity to protective cages or other objects.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	Cruise identifier	dimensionless	cruise_id
tow	MOCness tow number	dimensionless	tow
sta_std	Arabian Sea standard station identifier	dimensionless	sta_std
sta	station number from event log	dimensionless	sta
event	event number, from event log	MMDDHHmm	event
date	date of sampling (GMT)	YYYYMMDD	date
net	MOCNESS net number: 1-8: 1/4 meter MOCNESS 11-18: 1 meter MOCNESS	dimensionless	net
time	time in UTC	HHMM	time
lat	latitude of net tow (South is negative)	decimal degrees	lat
lon	longitude of net tow (West is negative)	decimal degrees	lon
depth_start	depth at start of tow	meters	depth_begin
depth_end	depth at end of tow	meters	depth_end
species	taxonomic genus and species	dimensionless	species
stage	developmental stage: f=female; m=male; c1-c5=copepodite stages; n=naupliar stages	dimensionless	stage
abundance	abundance of copepod stage	number copepods/meter^3	abundance

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Dataset: Copepod abundance - MOCNESS