Dataset: Anchovy data of Chesapeake Bay
Deployment: HRS100920JP

Anchovies from hypoxic waters of the Chesapeake Bay

Principal Investigator:

James J. Pierson (University of Maryland Center for Environmental Science, UMCES/HPL)

Co-Principal Investigator:

Edward Houde (University of Maryland Center for Environmental Science, UMCES/HPL)

BCO-DMO Data Manager:

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

Project:

Hypoxia in Marine Ecosystems: Implications for Neritic Copepods (DeZoZoo)

Current State:

Final with updates expected

Version:

working

Deployment Synonyms:

DZZ1003

Version Date:

2015-07-29

Data URL:

https://www.bco-dmo.org/dataset-deployment/563433/data

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Description

These data represent a merging of electronic data collected from the MOCNESS sensor systems and the count data from the samples collected with the net tows. Some nets were used for zooplankton samples (see http://www.bco-dmo.org/dataset/564755) , while others were collected specifically to estimate bay anchovy concentrations. These are contained on different sheets, and the count data was merged individually. This dataset represents the bay anchovy counts and abundance.

Methods & Sampling

Dataset acquisition description

These data were collected with the MOCNESS system from the ship.

Data Processing Description

Dataset Processing Description

Electronic data was post-processed by PI Pierson. Zooplankton sorting data was analyzed, processed, and quality controlled in PI Pierson's lab. Bay Anchovy sorted data was analyzed, processed, and quality controlled in co-PI Houde's lab

DMO adjustments: removed station latitude and longitude because MOCNESS tow start latitudes and longitudes are better. Removed MOCNESS-recorded times and used GPS times instead, which is much more accurate . Removed MOCNESS min and max depths due to occasional blocked pressure sensor. (PI, personal communication)

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0961942	NSF Division of Ocean Sciences

Instruments

MOCNESS.25

Supplied Name: 1/4 Meter MOC

Supplied Description:

Had trouble communicating with the 1/4 m2 MOCNESS in the beginning of the first cruise. Picked up replacement parts and were able to get it working again with an underwater unit borrowed from BESS, the manufacturer of the MOCNESS system. (Subsequent analysis by BESS, Inc. showed that some damage to the underwater unit was caused when it was plugged into the sea cable with some charge still in the cable -- most likely from the Seabird deck unit still turned on.) -- from the Cruise Report

Instrument Type

Generic Name: MOCNESS.25

Acronym: MOC.25

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. The MOCNESS-1/4 carries nine 1/4-m2 nets usually of 64 micrometer mesh and is used to sample the larger micro-zooplankton.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cruiseid	official cruise name	text	cruise_id
cruise_informal	The Year and the cruise series. i.e. 1101 = the first cruise in 2011	text	cruise_id
tow	MOCNESS trawl series number	text	tow
net	net number	text	net
year	year	time	year
month_local	month	time	month_local
day_local	day in local time	time	day_local
hour_local	hour in local time	time	hour_local
minute_local	minutes in local time	time	minute_local
seconds_local	seconds in local time	time	seconds_local
yrday_local	day of year in local time	time	yrday_local
lat_iffy	station latitude	decimal degrees; North is positive	lat
lon_iffy	station longitude	decimal degrees; West is negative	lon
vol_filt	filtration volume	cubic meters	vol_filt
temp	water temperature	degrees centrigrade	temperature
sal	water salinity; 50.000 indicates error for this channel.	PSU	sal
O2_mg_L	dissolved Oxygen	milligrams per liter	O2_mg_L
fluor	Chlorophyll a concentration from Wetlabs FLNTU	milligrams per cubic meter	fluor
turbidity	turbidity measured in Nephelometric Turbidity Unites (NTU) from Wetlabs FLNTU	NTU	turbidity
PAR	Photosynthetically available radiation	microEinsteins per square meter per second	PAR
lat_best	the latitude when a MOCNESS tow starts	decimal degrees	lat_start
lat_end	the latitude when a MOCNESS tow ends	decimal degrees	lat_end
lon_best	the longitude when a MOCNESS tow starts	decimal degrees	lon_start
lon_end	the longitude when a MOCNESS tow ends	decimal degrees	lon_end
depth_min	the surface depth of a net trawl	m	depth_min
depth_max	the bottom depth of a net trawl	m	depth_max
depth_mid	called the 'net depth'; the mid net depth	m	depth_mid
angle	MOCNESS trawl angle	degrees	tow_angle
dist	the tow distance	kilometers	no_bcodmo_term
area_net	the net mouth opening area	meters square	no_bcodmo_term
sample_id	Cruise_Date(YYYMMDD)_Station(Net Tow number)	text	sample
site	sampling station: north or south	text	site
time_local	local time of day	HH:MM	time
depth_relative	the relative sampling depth: above = above the pycnoclines; below = below the pycnoclines	text	brief_desc
stage	lifestage in the development of the bay anchovy	text	stage
vol_filt2	filtration volume	cubic meters	vol_filt
fish_num	the number of bay anchovies counted	number	count
fish_abund	bay anchovy concentration	the number of individuals per cubic meter	abundance
temp_sample	temp_sample	unknown	temp
sal_sample	sal_sample	unknown	sal

Database

Contribute Data

Dataset: Anchovy data of Chesapeake Bay
Deployment: HRS100920JP

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Anchovy data of Chesapeake BayDeployment: HRS100920JP

Dataset acquisition description

Dataset Processing Description

Dataset: Anchovy data of Chesapeake Bay
Deployment: HRS100920JP