Dataset: Trawl survey: fish and jellyfish sample data

Name: Fish and jellyfish sample data from R/V Centennial trawl surveys in the Hood Canal, WA from 2012-2013 (PelagicHypoxia project)
Published: 2017-11-02
Keywords: biota, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.718698.1

Spatial Extent: N:47.8299 E:-122.0915 S:47.3626 W:-123.1324

Temporal Extent: 2012-06-11 - 2013-10-03

Project:

Consequences of hypoxia on food web linkages in a pelagic marine ecosystem (PelagicHypoxia)

Principal Investigator:

Timothy Essington (University of Washington, UW)

Co-Principal Investigator:

John K. Horne (University of Washington, UW)

Julie E. Keister (University of Washington, UW)

Sandra Parker-Stetter (Northwest Fisheries Science Center - Seattle, NOAA NWFSC)

Contact:

Timothy Essington (University of Washington, UW)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2017-11-02

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Fish and jellyfish sample data from R/V Centennial trawl surveys in the Hood Canal, WA from 2012-2013 (PelagicHypoxia project)

Abstract:

Fish and jellyfish sample data from R/V Centennial trawl surveys in the Hood Canal, WA from 2012-2013

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2017-11-02	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.718698.1	2021-03-22

Description

This dataset contains fish and jellyfish sample information from R/V Centennial trawl surveys in the Hood Canal, WA from 2012-2013. The sample number, length, weight, and species are included.

Methods & Sampling

Sampling and analytical procedures:
Samples were chosen to target representative aggregations of fish as detected using multi-beam hydroacoustics. They are not designed to provide quantitative estimates of density, but rather to assess species and size composition and to collect individuals for tissue and stomach sampling. Net was a Marinovich midwater trawl, deployed using two wires and 2.5 meter FishBuster trawl doors. Trawl was fitted with a 3.2 mm knotless liner in the codend and towed at a vessel speed of 2−3 knots. Vertical opening of the trawl varied between 4.8 and 7.0 m.

Stomachs were dissected after euthanizing fish an overdose of MS-222. If samples were deemed to be empty at that point, they were not preserved. Otherwise, entire stomach was preserved in 90% ethanol. Some stomachs were inverted from barotrauma. These were not preserved and documented with an “I”.

Data Processing Description

BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* apostrophes deleted due to character restrictions
* NA changed to "nd" for "no data"
* Changed no sample taken indicator from blank to "N: for columns indicating whether isotope sample was taken or stomach contents examined.

Data Files

File
SampleData.csv (Comma Separated Values (.csv), 292.69 KB) MD5:e94c404711bd128c1822e5d3823d5b35 Primary data file for dataset ID 718698

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1154648

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
PelagicHypoxia_trawlsurveys		2012-06-11	R/V Centennial		data info

Instruments

GPS receiver

Supplied Name: Simrad GPS

Supplied Description:

Vessel position measured using on board GPS (Simrad)

Instrument Type

Generic Name: GPS receiver

Generic Description:

Acquires satellite signals and tracks your location.

This term has been deprecated. Use instead: https://www.bco-dmo.org/instrument/560

Midwater Trawl

Supplied Name: Marinovich midwater trawl

Supplied Description:

Instrument Type

Generic Name: Midwater Trawl

Acronym: TrawlMid

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/23/

Generic Description:

A mid-water or pelagic trawl is a net towed at a chosen depth in the water column to catch schooling fish such as herring and mackerel. Midwater trawl nets have very large front openings to herd schooling fish toward the back end where they become trapped in the narrow "broiler". The sides of the deployed net are spread horizontally with two large metal foils, called "doors," positioned in front of the net. As the trawler moves forward, the doors, and therefore the net, are forced outward, keeping the net open.
This instrument designation is used when specific make and model are not known.

Water Depth Logger

Supplied Name: Kongsberg Marine P150 net monitor

Supplied Description:

Trawl depth measured using Kongsberg Marine P150 net monitor.

Instrument Type

Generic Name: Water Depth Logger

Generic Description:

For measuring and recording water levels in rivers, streams, and wells.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
TrawlID	Unique identifier for each trawl deployment	unitless	tow
Month	Sample Cruise Month	unitless	month
Year	Sample cruise year	unitless	year
Diel	Day (D) or Night (N) sample	unitless	diel
Site	Sample site (A\|B\|C\|D see SiteTable)	unitless	site
Replicate	Unique identifier for tows conducted at same site / time period	unitless	replicate
Species	Name of species or taxonomic group	unitless	species
Length	Individual Fork length (herring) total length( all others)	millimeters (mm)	length
SampleNo	Unique identifier if tissue or stomach or otolith sample was taken	unitless	sample
Mass_Kg	Mass of individual to the neares 0.01 Kg	kilograms (Kg)	weight
Stomach	Was stomach sample collected (Y); was stomach empty (E) or inverted (I); no sample examined (N)	unitless	sample_descrip
Isotope	Was tissue sample collected (Y) or not (N)	unitless	sample_descrip
Comments	Notes on samples	unitless	comment

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Database

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Dataset: Trawl survey: fish and jellyfish sample data