http://lod.bco-dmo.org/id/dataset/3276
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2010-07-21
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Zooplankton identified in the Eastern Atlantic from R/V Polarstern ANT-XXIV_1 from November 2007 (CMarZ_2004-2010 project)
2009-11-24
publication
2009-11-24
revision
BCO-DMO Linked Data URI
2009-11-24
creation
http://lod.bco-dmo.org/id/dataset/3276
Leocadio Blanco-Bercial
University of Connecticut
principalInvestigator
Dr Janet M. Bradford-Grieve
New Zealand National Institute of Water and Atmospheric Research
principalInvestigator
Nancy Copley
Woods Hole Oceanographic Institution
principalInvestigator
Dr Ruben Escribano
Universidad de Concepcion
principalInvestigator
Dr Mikiko Kuriyama
Ocean Research Institute - University of Tokyo
principalInvestigator
Peter H. Wiebe
Woods Hole Oceanographic Institution
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Escribano, R., Blanco-Bercial, L., Wiebe, P. H., Copley, N., Kuriyama, M., Bradford-Grieve, J. M. (2009) Zooplankton identified in the Eastern Atlantic from R/V Polarstern ANT-XXIV_1 from November 2007 (CMarZ_2004-2010 project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 24 Nov. 2009) Version Date 2009-11-24 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3276 [access date]
Zooplankton identified on Polarstern cruise ANT-XXIV_1 in the Eastern Atlantic Dataset Description: <p>Objectives<br />
The objective on this cruise was to collect and identify as many different species from those that were to be found in the plankton tows in order to increase the number of species that have been barcoded. Special emphasis was to sample large volumes of water from the deep sea where diversity is high and the discovery of new species most likely.</p> Methods and Sampling: <p>"Zooplankton and micronekton were quantitatively sampled throughout the water column using a 1-m, a 10-m MOCNESS (Multiple Opening/Closing Net and Environmental Sensing System; Wiebe et al., 1985) and a Multinet (Hydro-Bios Kiel). The MOCNESS telemetered data continuously to the ship, including depth, temperature, salinity, horizontal speed, and volume filtered. This allowed on-the-fly adjustment of sampling depths or times, and completion of a continuous series of stratified hauls in a relatively short time. All data were recorded electronically for subsequent analysis.</p>
<p>The 10-m2 MOCNESS (MOC10) carried 5 separate nets; the mesh size of the nets was a combination of 3 mm and 335 um mesh. Net 0 had 3 mm mesh and nets 1 to 4 had 335 um mesh nets of special design that were fabricated for CMarZ cruises. The 1-m2 MOCNESS (MOC1) carried 9 separate nets; the mesh size of the nets was 335 um. The MOC10 sampled from about 5000 m to the surface, and the MOC1 and Multinet sampled from 1000 m to the surface." MOC-10 tows generally took 10 to 12 hours to complete, MOC-1 tows took about 3.5 hours, and Mulitnet tows took about 1.5 hours. (<em>from<a href="https://www.cmarz.org/pdf/Schiel_Polarstern24-1_cruise-rpt_Nov2007_BerPolMeer_2009.pdf" target="_blank"> Polarstern ANT/24-1 Cruise Report</a></em>)</p>
<p>Reference:<br />
Wiebe P.H., Morton A.W., Bradley A.M., Backus R.H., Craddock J.E., Cowles T.J., Barber V.A., Flierl G.R. (1985). New developments in the MOCNESS, an apparatus for sampling zooplankton and micronekton. Mar. Biol. 87: 313-323.</p>
Funding provided by Alfred P. Sloan Foundation (Sloan) Award Number: unknown CMarZ_2004-2010 Sloan
completed
Leocadio Blanco-Bercial
University of Connecticut
leocadio@asu.edu
pointOfContact
Dr Janet M. Bradford-Grieve
New Zealand National Institute of Water and Atmospheric Research
+64 4 3860362
301 Evans Bay Parade, Private Bag 14901
Kilbirnie, Wellington
New Zealand
j.grieve-at-niwa.co.nz
pointOfContact
Nancy Copley
Woods Hole Oceanographic Institution
508-289-3204
Redfield 226, MS#33
Woods Hole
MA
02543-1049
USA
ncopley@whoi.edu
pointOfContact
Dr Ruben Escribano
Universidad de Concepcion
Barrio Universitario PO BOX 160-C
Concepcion
CHILE
rescribano@copas.cl
pointOfContact
Dr Mikiko Kuriyama
Ocean Research Institute - University of Tokyo
pointOfContact
Peter H. Wiebe
Woods Hole Oceanographic Institution
508-289-2313
Biology Department Redfield 2-26 MS #33
Woods Hole
MA
02543-1049
USA
pwiebe@whoi.edu
pointOfContact
asNeeded
Dataset Version: 24 Nov. 2009
Unknown
inst
station
tow
date_local
time_local
yrday_local
lat
lon
net
depth_range
depth_mid
taxon
num_specimens
fraction
family
species
DNA_submitted
length
id_by
comments
MOCNESS1
MOCNESS10
Multinet
theme
None, User defined
instrument
station
tow
date_local
time_local
day of year and decimal time (local time zone)
latitude
longitude
net
depth_interval
depth_mid
taxon
number
No BCO-DMO term
family
species scientific name (binomial)
length
comments
featureType
BCO-DMO Standard Parameters
MOCNESS1
MOCNESS10
MultiNet
instrument
BCO-DMO Standard Instruments
ANT-XXIV_1
service
Deployment Activity
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Census of Marine Life
http://www.coml.org/
Census of Marine Life
The Census of Marine Life is a global network of researchers in more than 80 nations engaged in a 10-year scientific initiative to assess and explain the diversity, distribution, and abundance of life in the oceans. The world's first comprehensive Census of Marine Life - past, present, and future - will be released in 2010.
The stated purpose of the Census of Marine Life is to assess and explain the diversity, distribution, and abundance of marine life. Each plays an important role in what is known, unknown, and may never be known about what lives in the global ocean.
First, diversity. The Census aims to make for the first time a comprehensive global list of all forms of life in the sea. No such unified list yet exists. Census scientists estimate that about 230,000 species of marine animals have been described and reside in jars in collections in museums of natural history and other repositories. Since the Census began in 2000, researchers have added more than 5600 species to the lists. They aim to add many thousands more by 2010. The database of the Census already includes records for more than 16 million records, old and new. By 2010, the goal is to have all the old and the new species in an on-line encyclopedia with a webpage for every species. In addition, we will estimate how many species remain unknown, that is, remain to be discovered. The number could be astonishingly large, perhaps a million or more, if all small animals and protists are included. For comparison, biologists have described about 1.5 million terrestrial plants and animals.
Second, distribution. The Census aims to produce maps where the animals have been observed or where they could live, that is, the territory or range of the species. Knowing the range matters a lot for people concerned about, for example, possible consequences of global climate change.
Third, abundance. No Census is complete without measures of abundance. We want to know not only that there is such a thing as a Madagascar crab but how many there are. For marine life, populations are being estimated either in numbers or in total kilos, called biomass.
To complete the context, it is important to understand the top motivations for the Census of Marine Life. Most importantly, much of the ocean is unexplored. Most of the records in its database are for observations near the surface, and down to 1000 meters. No observations have been made in most of the deep ocean, while most of the ocean is deep.
Another important issue is that diversity varies in space. Marine hot spots, like the rain forests of the land, exist off for large fish off the coasts of Brazil and Australia. The goal is to know much more about marine hot spots, to help conserve these large fish. Their abundance and thus their diversity is changing, especially for commercially important species. Between 1952 and 1976, for example, fishermen and their customers emptied many areas of the ocean of tuna.
The Census has evolved a strategy of 14 field projects to touch the major habitats and groups of species in the global ocean. Eleven field projects address habitats, such as seamounts or the Arctic Ocean. Three field projects look globally at animals that either traverse the seas or appear globally distributed: the top predators such as tuna and the plankton and the microbes. The projects employ a mix of technologies. These include acoustics or sound, optics or cameras, tags placed on individual animals that store or report data, and genetics, as well as some actual capture of animals. The technologies complement one another. Sound can survey large areas in the ocean, while light cannot. Light can capture detail and characters that sound cannot. And genetics can make identifications from fragments of specimens or larvae where pictures tell little.
This mix of curiosity, need to know, technology, and scientists willing to investigate the unexplored and undiscovered will result in a Census of Marine Life in 2010 that provides a much clearer picture of what lives below the surface around the globe. Several reasons make such a report timely, indeed urgent. Crises in the sea are reported regularly. One recent study predicted the end of commercial fishery globally by 2050, if current trends persist. Better information is needed to fashion the management that will sustain fisheries, conserve diversity, reverse losses of habitat, reduce impacts of pollution, and respond to global climate change. Hence, there are biological, economic, philosophical and political reasons to push for greater exploration and understanding of the ocean and its inhabitants. Indeed, the United Nations Convention on Biological Diversity requires signatories to collect information on living resources, but, as yet, no nation has a complete baseline of such information. The Census of Marine Life's global network of researchers will help to fill this knowledge gap, providing critical information to help guide decisions on how to manage global marine resources for the future.
[Text copied from the CoML web site, November 5, 2008]
CoML
largerWorkCitation
program
Census of Marine Zooplankton-2004-2010
http://www.cmarz.org/
Census of Marine Zooplankton-2004-2010
<p><em>The Census of Marine Zooplankton</em> (CMarZ) is a field project of the Census of Marine Life (see <a class="navigation" href="http://www.coml.org" target="_blank">www.CoML.org</a>). CMarZ is working toward a taxonomically comprehensive assessment of biodiversity of animal plankton throughout the world ocean. The project goal is to produce accurate and complete information on zooplankton species diversity, biomass, biogeographical distribution, genetic diversity, and community structure by 2010. Our taxonomic focus is the animals that drift with ocean currents throughout their lives (i.e., the holozooplankton, Fig. 1). This assemblage currently includes ~6,800 described species in fifteen phyla; our expectation is that at least that many new species will be discovered as a result of our efforts. The census encompasses unique marine environments and those likely to be inhabited by endemic and undescribed zooplankton species.</p>
CMarZ_2004-2010
largerWorkCitation
project
eng; USA
oceans
2009-11-24
Global ocean
0
BCO-DMO catalogue of parameters from Zooplankton identified in the Eastern Atlantic from R/V Polarstern ANT-XXIV_1 from November 2007 (CMarZ_2004-2010 project)
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/20156.rdf
Name: inst
Units: dimensionless
Description: <p>The instrument used to catch the animals.</p>
http://lod.bco-dmo.org/id/dataset-parameter/20157.rdf
Name: station
Units: dimensionless
Description: <p>consecutive station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/20158.rdf
Name: tow
Units: dimensionless
Description: <p>tow number</p>
http://lod.bco-dmo.org/id/dataset-parameter/20159.rdf
Name: date_local
Units: unknown
Description: <p>local date, yyyymmdd</p>
http://lod.bco-dmo.org/id/dataset-parameter/20160.rdf
Name: time_local
Units: unknown
Description: <p>hhmm. 24 hour clock</p>
http://lod.bco-dmo.org/id/dataset-parameter/20161.rdf
Name: yrday_local
Units: decimal days
Description: <p>Decimal days since Jan. 1. Jan 1 at noon is 001.5. </p>
http://lod.bco-dmo.org/id/dataset-parameter/20162.rdf
Name: lat
Units: decimal degrees
Description: <p>North is positive and south is negative.</p>
http://lod.bco-dmo.org/id/dataset-parameter/20163.rdf
Name: lon
Units: decimal degrees
Description: <p>West is negative longitude and east is positive.</p>
http://lod.bco-dmo.org/id/dataset-parameter/20164.rdf
Name: net
Units: unknown
Description: <p>Which net in a multiple net system.</p>
http://lod.bco-dmo.org/id/dataset-parameter/20165.rdf
Name: depth_range
Units: meters
Description: <p>The min and max depths over which the net was open.</p>
http://lod.bco-dmo.org/id/dataset-parameter/20166.rdf
Name: depth_mid
Units: meters
Description: <p>One depth to represent the sample collection depth if one depth is necessary. The middle of the depth range over which the net was sampled.</p>
http://lod.bco-dmo.org/id/dataset-parameter/20167.rdf
Name: taxon
Units: unknown
Description: <p>The scientific name to species if possible. If not, to whatever taxonomic level the animal could be identified.</p>
http://lod.bco-dmo.org/id/dataset-parameter/20168.rdf
Name: num_specimens
Units: unknown
Description: <p>How many animals were picked from the tow. Sometimes this was a subsample of the total found in the net, sometime it was the total found in a particular net. </p>
http://lod.bco-dmo.org/id/dataset-parameter/20169.rdf
Name: fraction
Units: unknown
Description: <p>which subsample the animals came from: live, ethanol or formalin</p>
http://lod.bco-dmo.org/id/dataset-parameter/20170.rdf
Name: family
Units: unknown
Description: <p>taxonomic family</p>
http://lod.bco-dmo.org/id/dataset-parameter/20171.rdf
Name: species
Units: unknown
Description: <p>a binomial that consists of a genus name followed by the species name of an organism</p>
http://lod.bco-dmo.org/id/dataset-parameter/20172.rdf
Name: DNA_submitted
Units: unknown
Description: <p>whether or not the specimen was submitted to the DNA lab for analysis.</p>
http://lod.bco-dmo.org/id/dataset-parameter/20173.rdf
Name: length
Units: mm
Description: <p>length of specimen</p>
http://lod.bco-dmo.org/id/dataset-parameter/20174.rdf
Name: id_by
Units: mm
Description: <p>initial of person who identified specimen.</p>
http://lod.bco-dmo.org/id/dataset-parameter/20175.rdf
Name: comments
Units: unknown
Description: <p>free text comments</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
44900
https://datadocs.bco-dmo.org/file/VJJWDRLFko82m0/zoop_PS24.csv
zoop_PS24.csv
Primary data file for dataset ID 3276
download
https://osprey.bco-dmo.org/dataset/3276/data/download
download
onLine
dataset
<p>"Zooplankton and micronekton were quantitatively sampled throughout the water column using a 1-m, a 10-m MOCNESS (Multiple Opening/Closing Net and Environmental Sensing System; Wiebe et al., 1985) and a Multinet (Hydro-Bios Kiel). The MOCNESS telemetered data continuously to the ship, including depth, temperature, salinity, horizontal speed, and volume filtered. This allowed on-the-fly adjustment of sampling depths or times, and completion of a continuous series of stratified hauls in a relatively short time. All data were recorded electronically for subsequent analysis.</p>
<p>The 10-m2 MOCNESS (MOC10) carried 5 separate nets; the mesh size of the nets was a combination of 3 mm and 335 um mesh. Net 0 had 3 mm mesh and nets 1 to 4 had 335 um mesh nets of special design that were fabricated for CMarZ cruises. The 1-m2 MOCNESS (MOC1) carried 9 separate nets; the mesh size of the nets was 335 um. The MOC10 sampled from about 5000 m to the surface, and the MOC1 and Multinet sampled from 1000 m to the surface." MOC-10 tows generally took 10 to 12 hours to complete, MOC-1 tows took about 3.5 hours, and Mulitnet tows took about 1.5 hours. (<em>from<a href="https://www.cmarz.org/pdf/Schiel_Polarstern24-1_cruise-rpt_Nov2007_BerPolMeer_2009.pdf" target="_blank"> Polarstern ANT/24-1 Cruise Report</a></em>)</p>
<p>Reference:<br />
Wiebe P.H., Morton A.W., Bradley A.M., Backus R.H., Craddock J.E., Cowles T.J., Barber V.A., Flierl G.R. (1985). New developments in the MOCNESS, an apparatus for sampling zooplankton and micronekton. Mar. Biol. 87: 313-323.</p>
Specified by the Principal Investigator(s)
<p>On Deck: With completion of the tow, the nets were immediately washed with seawater as they were pulled on deck and the plankton still in the nets carefully washed into the cod-end with a seawater hose. The cod-ends were placed in buckets with ice packs to cool the samples and moved expeditiously into the walk-in cold room to await analysis.</p>
<p>&nbsp;</p>
<p>Specimen removal: All sample handling except microscopic examination was done in the cold room. The contents of codend bucket was first poured into a tray for a photograph of the entire sample. Then, followed picking and removal of large individuals of 1) gelatinous forms, 2) fish, and 3) macrozooplankton/nekton into cold seawater while a recorder wrote notes on the gross composition of the sample. The specimens removed were placed in numbered jars, shell vials, or dishes and the recorder wrote down all specimen information on the data sheets provided. The removed specimens were subject to a variety of procedures including further identification, dissection, preservation (in alcohol, frozen nitrogen, or formalin as appropriate), or taken for photographic imaging prior to preservation.</p>
<p>Sample splitting and preservation: Splitting was done using a box splitter. The first half was put into 95% pure (undenatured) ethanol. The second half was split again into 1/4 live and 1/4 formalin with buffer (sodium borate) added. The 1/4 live portion was kept in the cold room (time noted). Photos were taken of selected live animals and scientists removed and identified some zooplankton from the live split for genetic barcoding. Once done, the rest of the live sample was preserved in 4% buffered formalin (time noted). Twenty-four hours later, the ethanol was changed and the lid marked to show that this was done. Samples in the 1/4 ethanol were stored in a refrigerated storage area on the ship and later off-loaded at AWI for further examination and archiving. Live and formalin splits were transported to WHOI for further examination and storage.</p>
<p>For information the genetic barcoding protocol, see <a href="http://www.cmarz.org/barcode/protocols/protocols.html" target="_blank">http://www.cmarz.org/barcode/protocols/protocols.html</a> or email Ann Bucklin, UConn, ann.bucklin-at-uconn.edu.</p>
<p>Euphausiids: Some euphausiids were examined from all three fractions: formalin, ethanol, and live. The formalin split was not used for DNA analysis, so early in the cruise they provided a good source of euphausiids that could be examined at length in order to establish the species present. Once we became familiar with the species, we mainly sorted from the ethanol samples. These were most useful for submission to the on-board DNA barcoding effort because the live fractions could be looked at only briefly in order to keep their genetic material intact. Many of the specimens were photographed using the dissecting microscope and camera equipment provided by Cheryl Clark-Hopcroft.</p>
<p>Euphausiids were identified from the first four MOCNESS stations with a total of 172 euphausiid specimens representing 23 species, more than 1/4 of all known species worldwide. Most of the euphausiids were found in the 1-m2 MOCNESS samples, which collected in the top 1,000 m. Only three species were collected in the 10-m2 MOCNESS and they were found in the shallowest net (1,000- 2,000 m) although not all nets were examined from the tows. Photographs of the specimens will be used as identification checks, for the web photo gallery and as material for the CMarZ species pages (see www.cmarz.org).</p>
<p>Measurements of eye and carapace lengths are the primary method of distinguishing<em> N. atlantica</em> from <em>N. microps</em>, two very similar species with overlapping distributions. This relationship was originally established using formalin preserved specimens and may not hold for animals in 95 % ethanol, in which they shrink significantly. The photos of <em>Nematoscelis atlantica</em> (Fig. 3.6.1) were used to record eye and carapace lengths of the ethanol specimens and will be used to compare with formalin data. The genetic analysis will be essential for validating this method of identification." (<em>from <a href="http://epic.awi.de/28985/1/Sch2009ad.pdf">Polarstern ANT/24-1 Cruise Report</a></em>)</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
MOCNESS1
MOCNESS1
PI Supplied Instrument Name: MOCNESS1 PI Supplied Instrument Description:335 micorn mesh, 9 nets Instrument Name: MOCNESS1 Instrument Short Name:MOC1 Instrument 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). Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/NETT0097/
MOCNESS10
MOCNESS10
PI Supplied Instrument Name: MOCNESS10 PI Supplied Instrument Description:5 nets: net 0 with 3 mm mesh and the others with 335 micron mesh. Instrument Name: MOCNESS10 Instrument Short Name:MOC10 Instrument 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). Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/NETT0097/
Multinet
Multinet
PI Supplied Instrument Name: Multinet PI Supplied Instrument Description:Maxi: mouth opening of 0.5 m2, nine nets and a mesh size of 150 µm; standard sampling intervals 1000-800-600-500-400-300-200-100-50-0 m.
Midi: mouth opening of 0.25 m2 and
five nets equipped with 100 µm mesh; standard sampling intervals 1005-500-300-100-
50-0 m. Instrument Name: MultiNet Instrument Short Name:MultiNet Instrument Description: The MultiNet© Multiple Plankton Sampler is designed as a sampling system for horizontal and vertical collections in successive water layers. Equipped with 5 or 9 net bags, the MultiNet© can be delivered in 3 sizes (apertures) : Mini (0.125 m2), Midi (0.25 m2) and Maxi (0.5 m2). The system consists of a shipboard Deck Command Unit and a stainless steel frame to which 5 (or 9) net bags are attached by means of zippers to canvas. The net bags are opened and closed by means of an arrangement of levers that are triggered by a battery powered Motor Unit. The commands for actuation of the net bags are given via single or multi-conductor cable between the Underwater Unit and the Deck Command Unit. Although horizontal collections typically use a mesh size of 300 microns, mesh sizes from 100 to 500 may also be used. Vertical collections are also common. The shipboard Deck Command Unit displays all relevant system data, including the actual operating depth of the net system. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/NETT0099/
Cruise: ANT-XXIV_1
ANT-XXIV_1
Community Standard Description
International Council for the Exploration of the Sea
R/V Polarstern
vessel
ANT-XXIV_1
Dr Sigi Schiel
Alfred Wegener Institute for Polar and Marine Research
http://epic.awi.de/28985/1/Sch2009ad.pdf
Report describing ANT-XXIV_1
Community Standard Description
International Council for the Exploration of the Sea
R/V Polarstern
vessel