Dataset: GoM WBTS 2012-2013 Calanus finmarchicus abundance

Name: Calanus finmarchicus stages abundance from 200um vertical ring nets TimeSeries stations from R/V Gulf Challenger in the Gulf of Maine; Wilkinson Basin and Jeffreys Ledge, 2012-2013 (GoM_Calanus_2012-2013 project)
Published: 2015-01-14
Keywords: biota, oceans

Cite This Dataset

Spatial Extent: N:42.898 E:-69.861 S:42.862 W:-70.14

Project:

RAPID: Effect of a Very Low NAO Event on the Abundance of the Lipid-Rich Planktonic Copepod, Calanus finmarchicus, in the Gulf of Maine (GoM_Calanus_2012-2013)

Chief Scientist:

Jeffrey A. Runge (University of Maine)

Principal Investigator:

Jeffrey A. Runge (Gulf of Maine Research Institute, GMRI)

Contact:

Cameron Thompson (Gulf of Maine Research Institute, GMRI)

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

working

Version Date:

2015-01-14

Restricted:

Validated:

Current State:

Final with updates expected

Calanus finmarchicus stages abundance from 200um vertical ring nets TimeSeries stations from R/V Gulf Challenger in the Gulf of Maine; Wilkinson Basin and Jeffreys Ledge, 2012-2013 (GoM_Calanus_2012-2013 project)

Expand/Collapse All

Description

Abundance of Calanus finmarchicus stages caught in 200um vertical ring nets(bottom to surface) at two time series stations in the Gulf of Maine (2012 - 2013).

Users are requested to consult with Jeffrey Runge prior to preparation of any manuscripts or reports, either written or online, that make use of zooplankton and hydrographic data originating from this study. The data are freely available without need for consultation with Dr. Runge after October, 2017.

Methods & Sampling

These deployments followed the AZMP protocols (Mitchell et al. 2002). Using a 0.75 meter diameter SEA-GEAR Model 9600 twin-ring, 200µm mesh net, two vertical casts were made to within 5 meters of the bottom at each station.

Two replicate samples from separate casts were preserved in a 4% seawater-buffered formaldehyde solution. In the laboratory, all formalin preserved zooplankton samples were split in half using a Folsom Plankton Splitter. Half of the sample was archived for identification and enumeration of zooplankton, and the other half was processed for biomass determination. To estimate abundances the archival split was diluted and sub-sampled with a 5 mL Stempel pipette. Depending on abundance in the sample, multiple subsamples were taken until a target number of 75-150 C. finmarchicus copepodids were enumerated and staged and in addition at least 200 specimens in total were counted and identified to the lowest possible taxa.

Mitchell, M. R., G. Harrison, K. Pauley, A. Gagné, G. Maillet, and P. Strain. (2002) Atlantic Zonal Monitoring Program Sampling Protocol. Canadian Technical Report of Hydrography and Ocean Sciences 223.

Data Processing Description

The counts were normalized to abundance (number m-2), taking into account the subsample dilution, the split, and volume sampled by the net at the station. Because of unreliable flowmeter readings, we calculated volume filtered by the net from net area and net depth. The filtered volume calculated geometrically, as we have done here, is closely related to the flowmeter volume when flowmeters were working properly.

Volume = Net Depth * Net Area

Abundance (number m-2) = ( (count*Dilution Factor / Archival split) / Volume) *Station Depth

Data Files

File
Cfin_abund_GoM.csv (Comma Separated Values (.csv), 4.45 KB) MD5:0b11441c6c5f5b9eca92c58ad659e486 Primary data file for dataset ID 544850

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1235920

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
GC_GoM_2012-2013		2012-04-06	R/V Gulf Challenger	Jeffrey A. Runge (Chief Scientist)	data info

Instruments

Ring Net

Supplied Description:

0.75 meter diameter, SEA-GEAR Model 9600 twin-ring, 200um mesh net

Instrument Type

Generic Name: Ring Net

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/22/

Generic Description:

A Ring Net is a generic plankton net, made by attaching a net of any mesh size to a metal ring of any diameter. There are 1 meter, .75 meter, .25 meter and .5 meter nets that are used regularly. The most common zooplankton ring net is 1 meter in diameter and of mesh size .333mm, also known as a 'meter net' (see Meter Net).

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
day_local	day local time	dd	day_local
lat	latitude	decimal degrees; North is positive	lat
lon	longitude	decimal degrees; West is negative	lon
num_ided	number of Calanus finmarchicus (including nauplii) that were counted and staged during analysis of the sample	integer	number
depth_net	depth of the ring net according to length of wire out of the winch; as read by a meter wheel	meters	depth
depth_station	water depth at the station according to depth sounder on vessel	meters	depth_w
month_local	month local time	mm	month_local
date_local	date local time	mmddyyyy	date_local
yrday_local	day of year local time	number	yrday_local
dil_factor	water volume the sample is diluted into / volume of water subsampled	number	no_bcodmo_term
nauplii	abundance of all naupliear stages in water column; note that the 200um mesh would let many young stages through	number per m2	abundance
stage_CI	abundance of copepodid stage 1	number per m2	abundance
stage_CII	abundance of copepodid stage 2	number per m2	abundance
stage_CIII	abundance of copepodid stage 3	number per m2	abundance
stage_CIV	abundance of copepodid stage 4	number per m2	abundance
stage_CV	abundance of copepodid stage 5; pre-adult stage	number per m2	abundance
female	abundance of females(copepodid stage 6) in water column	number per m2	abundance
male	abundance of males (copepodid stage 6)	number per m2	abundance
cruise	each deployment has its own cruise ID following this format: GC for R/V Gulf Challenger; followed by the date (mmddyy)	text	cruise_id
station	WB-5 or WB-7	text	station
site	either Jeffreys Ledge (WB-5) or Wilkinson Basin (WB-7)	text	site
year	year	yyyy	year

Status message

Database

Contribute Data

Dataset: GoM WBTS 2012-2013 Calanus finmarchicus abundance