Dataset: Pyrosomes - MOCNESS

Name: Pyrosome (Pyrosoma atlanticum) samples from MOCNESS tows in the Northern California Current
Published: 2021-12-10
Keywords: Pyrosoma atlanticum, vertical distribution, California Current, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.866663.1

Spatial Extent: N:44.6529 E:-124.268 S:41.0459 W:-125.144

Temporal Extent: 2018-02-17 - 2018-07-11

Project:

Collaborative Research: Mesozooplankton food webs in intermittent upwelling systems: An overlooked link in a productive ocean (MEZCAL)

Principal Investigator:

Kelly Rakow Sutherland (University of Oregon)

Co-Principal Investigator:

Robert K. Cowen (Oregon State University, OSU-HMSC)

Su Sponaugle (Oregon State University, OSU-HMSC)

Contact:

Joanna Lyle (University of Oregon, OIMB)

BCO-DMO Data Manager:

Karen Soenen (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2021-12-10

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Pyrosome (Pyrosoma atlanticum) samples from MOCNESS tows in the Northern California Current

Abstract:

Pyrosome (Pyrosoma atlanticum) samples from MOCNESS tows in the Northern California Current.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2021-12-10	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.866663.1	2022-08-11

Description

These data were published in Lyle, J.T. et al. Table II

Methods & Sampling

Pyrosoma atlanticum colonies were collected from coupled Multiple Opening and Closing Environmental Sensing System (MOCNESS) tows (Guigand et al., 2005). The nets had openings of 1 m2 and 4 m2 with mesh sizes of 333 µm and 1000 µm, respectively. The pair of nets sampled to 100 m depth in four separate 25-m bins, and a fifth net (“net 0”) was towed to 100 m during the downcast. Pyrosome colonies in each net were enumerated and their volume measured by displacement. Biovolume (mL•m-3) was calculated by dividing the total pyrosome volume by the volume of water sampled in that tow. If pyrosomes were too numerous to count, a subset of 20 from each depth bin were measured for biovolume. Colony lengths were only measured during July 2018.

Multiple Opening/Closing Net and Environmental Sensing Systems (MOCNESS) fitted with a 4 m2 net with 1 mm mesh and a 1 m2 net with 333 µm mesh.

Data Processing Description

Pyrosome abundance and biovolume were processed in Excel (v.16.16.4). MOCNESS filtered volumes were sourced from this dataset: https://www.bco-dmo.org/dataset/783036

Data Files

File

pyrosomes_MOC
filename: pyrosomes_MOC.xlsx

(Octet Stream, 36.93 KB)
MD5:bd5b816dd30caf88e616499f115816b5

Same data table as served in https://www.bco-dmo.org/dataset/866663. The only difference is the length of the samples is kept in columns. This format might also be useful for users to reuse the data. This excel file contains a tab with parameter descriptions and another tab with the data itself. 

pyrosomes_MOC.csv

(Comma Separated Values (.csv), 49.19 KB)
MD5:0020a2def5f09d4f4813aa8e79476c4c

Primary data file for dataset ID 866663

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1737364
NSF Division of Ocean Sciences	OCE-1737399

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
SKQ201804S	W18	2018-02-17	R/V Sikuliaq	Robert K. Cowen (Chief Scientist)	data info
SR1810	S18	2018-07-06	R/V Sally Ride	Robert K. Cowen (Chief Scientist)	data info

Instruments

MOCNESS

Supplied Name: Multiple Opening/Closing Net and Environmental Sensing Systems (MOCNESS)

Supplied Description:

Multiple Opening/Closing Net and Environmental Sensing Systems (MOCNESS) fitted with a 4 m2 net with 1 mm mesh and a 1 m2 net with 333 µm mesh.

Instrument Type

Generic Name: MOCNESS

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. There are currently 8 different sizes of MOCNESS in existence which are designed for capture of different size ranges of zooplankton and micro-nekton Each system is designated according to the size of the net mouth opening and in two cases, the number of nets it carries. The original MOCNESS (Wiebe et al, 1976) was a redesigned and improved version of a system described by Frost and McCrone (1974).(from MOCNESS manual) This designation is used when the specific type of MOCNESS (number and size of nets) was not specified by the contributing investigator.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise	Cruise identification number: S=summer; W=winter; 18=2018	unitless	cruise_id
Location	Sampling location: NH=Newport, OR; TR=Trinidad Head, CA	unitless	sta_id
Station	Location along transect: 1=closest nearshore; 5=furthest offshore; D=day; N=night	unitless	sta_id
Transect	Sampling transect: Ma=first transect; Mb=second transect	unitless	transect
Date_Time_UTC	Date and time of the start of the net towing in UTC time zone Format: %Y-%m-%d %H:%M:%S	yyyy-mm-dd hh:mm:ss	ISO_DateTime_UTC
Latitude	Latitude of tow start location, north is positive	decimal degrees	lat
Longitude	Longitude of tow start location, west is negative	decimal degrees	lon
Moc_size	Size of net for sample: 1=1m2 with 333um mesh; 4=4m2 with 1mm mesh	m^2	net_mesh
Net_number	Net open on MOCNESS: 0=oblique; 1=100-75m, 2=75-50m, 3=50-25m, 4=25-0m	unitless	net_mesh
Vol_filtered	Filtered volume during tow	m^3	vol_filt
Total_pyrosome_vol	Total volume of pyrosomes (Pyrosoma atlanticum) from net tow, measured by displacement	mL	sample_volume
Total_count	Total number of pyrosomes (Pyrosoma atlanticum) from net tow	count	count
Subsample_count	Number of pyrosomes (Pyrosoma atlanticum) used for subsample	count	count
Subsample_vol	Volume of pyrosomes (Pyrosoma atlanticum) in subsample, measured by displacement	mL	sample_volume
Est_total_count	Estimated total count of pyrosomes (Pyrosoma atlanticum), calculated for samples where total count is unknown	count	count
Abundance	Abundance of pyrosomes (Pyrosoma atlanticum) from net tow	count/m^3	abundance
Biovolume	Volume of pyrosomes (Pyrosoma atlanticum) per filtered volume during tow	ml/m^3	biovolume
Colony_ID	Unique identifier for individual pyrosome colonies collected from net tows for length measurement. The field may be left blank if no colony lengths were measured.	unitless	sample
Length	Length of Pyrosoma atlanticum colony in cm recorded from each net tow. No lengths were recorded on W18 cruise	cm	length

Database

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Dataset: Pyrosomes - MOCNESS