<div><p>Methodology:<br />
Plankton samples were collected from discrete depths during CTD casts using a high-capacity, diaphragm pump with an intake hose mounted to the CTD Rosette. Subsamples of sample contents were manually counted, identified, and measured in the laboratory</p>
<p>Sampling and analytical procedures:<br />
For each sample, the pump was run for a timed period of nominally 5 min. The flow rate of the pump was usually measured immediately prior to sampling, by recording the time required to fill a barrel of known volume. Samples were preserved and stored in 5% buffered formalin. The laboratory protocol was to separate samples into two size fractions by passing them through large (200 or 500 μm) then small (64 μm) mesh sieves; split, dilute, and sub-sample each size fraction as needed; count and identify all plankters (minimum n = 50) in each subsample; and estimate the length and width of exactly 100 plankters (the first 50 from the large and small fraction, respectively) to the nearest 50 μm using a dissecting microscope. Three replicate small size fractions per sample were processed starting in 2006.</p>
<p>Data column "vol" was calculated as follows:<br />
vol = length(unique(replicate)*aliquot/beaker/2^splits*50/s_per_50l*d_min*60*1e-3</p>
<p>Data column "flag" contains the following codes:<br />
flag 1: length & width were not measured, but estimated from similar samples<br />
flag 2: shallow & deep samples not labeled, but deduced from sample contents<br />
flag 3: depth estimate less accurate than usual (± ~3 m)<br />
flag 4: time estimate less accurate than usual (± ~15 min)<br />
flag 5: pump flow rate estimated by nominal flow rate</p></div>
Analysis of mesozooplankton from pump samples
<div><p>Subsets of these data were published in the papers listed in the "Related Resources" section.</p>
<p>Related dataset:<br />
* ScanFish Optical Plankton Counter (OPC) data: <a href="https://www.bco-dmo.org/dataset/746081">https://www.bco-dmo.org/dataset/746081</a></p></div>
Pump mesozooplankton samples
<div><p>Data processing:<br />
Nominal sampling time and depth were corrected by analysis of CTD upcast data. CTD pressure sensor measurements at depth were adjusted to compensate for non-zero readings on deck of the research vessel over the course of each cruise. Bottom depth was estimated from filtered CTD altimeter and pressure data. Longitude and latitude were taken from the vessel’s MIDAS system or a separate GPS unit at the time the CTD was turned on. Inconsistent taxonomic identifications (e.g., misspelled or misleading colloquial categories) were corrected by manually creating and automatically applying a lookup table. All data processing was performed using the R language and environment for statistical computing.</p>
<p>BCO-DMO Data Manager Processing Notes:<br />
* added a conventional header with dataset name, PI name, version date<br />
* modified parameter names to conform with BCO-DMO naming conventions<br />
* added ISO Timestamp column<br />
* rounded decimal places of columns. Number of decimal places provided by data contributor.</p>
<p>Data version 1: 2018-09-12 replaced by data version 2: 2018-10-22. Dataset was modified to use unique ctd profile identifiers and remove redundant time/date columns (y,m,d,h,m,s).</p></div>
746107
Pump mesozooplankton samples
2018-09-12T13:04:38-04:00
2018-09-12T13:04:38-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:746107
Mesozooplankton sample data from R/V Pelican cruises PE03-NGOMEX, PE04-NGOMEX, PE06-NGOMEX, PE07-NGOMEX, PE09-05 in the Northern Gulf of Mexico from 2003-2008
CTD casts using a high-capacity, diaphragm pump were conducted during the R/V Pelican cruises PE03-NGOMEX, PE04-NGOMEX, PE06-NGOMEX, PE07-NGOMEX, and PE09-05 in the Northern Gulf of Mexico between 2003 and 2008. Plankton samples were collected from discrete depths during the CTD casts. Subsamples of sample contents were manually counted, identified, and measured in the laboratory.
false
Roman, M., Kimmel, D., Pierson, J., Huebert, K. (2018) Mesozooplankton sample data from R/V Pelican cruises PE03-NGOMEX, PE04-NGOMEX, PE06-NGOMEX, PE07-NGOMEX, PE09-05 in the Northern Gulf of Mexico from 2003-2008. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2) Version Date 2018-10-22 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.749705 [access date]
true
2
10.1575/1912/bco-dmo.749705
false
Gulf of Mexico
mesozooplankton
distribution
hypoxia
2018-10-22
Datapackage.json
Frictionless Data Package
https://www.bco-dmo.org/dataset/746107/datapackage.json
application/vnd.datapackage+json
PDF
https://www.bco-dmo.org/dataset/746107/Dataset_description.pdf
application/pdf
ISO 19115-2 (NOAA Profile)
https://www.bco-dmo.org/dataset/746107/iso
application/xml
http://www.isotc211.org/2005/gmd-noaa
Dublin Core
https://www.bco-dmo.org/dataset/746107/dublin-core
application/xml
http://purl.org/dc/elements/1.1/
746107
http://lod.bco-dmo.org/id/dataset/746107
2003-07-30 - 2008-08-12
2003-07-30
2003-07-30
---30
210
--07
2003
2008-08-12
2008-08-12
---12
224
--08
2008
OSPREY
http://www.opengis.net/def/crs/OGC/1.3/CRS84
<http://www.opengis.net/def/crs/OGC/1.3/CRS84> POLYGON((-93.65449 28.39068, -89.47567 28.39068, -89.47567 28.39068, -89.47567 29.6996, -93.65449 29.6996, -93.65449 28.39068))
-93.65449
28.39068
-89.47567
29.6996
29.045140000000
-91.565080000002
VIEW TABLE
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_746107.htmlTable
text/html
SUBSET DATA
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_746107.html
text/html
CSV
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_746107.csv
text/csv
TSV
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_746107.tsv
text/tsv
GeoJSON
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_746107.geoJson
application/geo+json
MATLAB
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_746107.mat
text/x-matlab
netCDF
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_746107.nc
application/x-netcdf
ODV
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_746107.odvTxt
text/plain