Fish larvae growth rates and related data from BONGO nets from the R/V Albatross IV, R/V Seward Johnson, R/V Oceanus, R/V Edwin Link cruises in the Gulf of Maine and Georges Bank, from 1993-1999 (GB project)

Website: https://www.bco-dmo.org/dataset/3697
Version: 2012-08-15

Project
» U.S. GLOBEC Georges Bank (GB)

Program
» U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)
ContributorsAffiliationRole
Buckley, Larry J.University of Rhode Island (URI-GSO)Principal Investigator
Caldarone, ElaineNortheast Fisheries Science Center - Narragansett (NOAA NEFSC)Co-Principal Investigator, Co-Principal Investigator
Kinkade, DanieWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

Principle objectives of the US GLOBEC Georges Bank Program were to study the composition of the larval fish community on Georges Bank, to define larval fish distribution across the Bank and within the water column, to determine those factors which influence their vertical distribution, and to determine bank-wide versus "Patch-Study" mortality and growth rates.  Emphasis is on Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) larvae along with their predators and prey.  This study also includes larval distribution and abudance, analysis of feeding habits, and age and growth determination.  These objectives were implemented through use of bongo nets and MOCNESS tows to make the animal collections. 


Methods & Sampling

GLOBEC Fish Larvae were collected by Bongo nets.  In some cruises nets were equiped with digital flow meters suspended in the mouth of the net and conductivity/temperature/depth measuring packages attached above the bongo. 

For additional information on sampling and analytical methods used during the 1993 study (AL9306), see the Northeast Fisheries Science Center Reference Document 95-12: 1993 Georges Bank Stratification Study.


Data Processing Description

BCO-DMO Processing Notes:

- Original data file was edited in excel to add BCO-DMO convention header line, cruise and PI comment lines. 

- Because the original file:  “Buckley data for Georges Back GLOBEC website 8-6-2012.xls” contained both Bongo and MOCNESS data, it was subsequently split into three separate data files based on gear and cruise type.  These datasets are served separately:

  • fishlarvae_M1 contains data from MOCNESS tows
  • fishlarvae_Bon_pro contains Bongo data from process cruises only
  • fishlarvae_Bon_bss contains Bongo data from broadscale cruises only

Additional edits to this dataset, fishlarvae_Bon_pro:

- Tow was edited to haul_id at the request of the PI

- Edited precision for sal_avg, temp_avg, sigma_t_avg to three decimals.

- Edited values of 99 for sal_avg, temp_avg, sigma_t_avg to "nd".

- Parameter names were edited to adhere to BCO-DMO and GLOBEC convention, of particular note:

  • EDST was edited to time_local
  • Species was edited to common_name because sometimes the animal wasn't identified to species.
  • Cruisetype was edited to brief_desc

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Data Files

File
fishlarvae_Bon_pro.csv
(Comma Separated Values (.csv), 694.01 KB)
MD5:0cea28c3512cf232bf9e24c2b6aa7a68
Primary data file for dataset ID 3697

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Parameters

ParameterDescriptionUnits
cruise_idCruise Id, e.g., AL9306 represents the R/V Albatross cruise 9306 dimensionless
yearFour digit year.
brief_descType of research or study conducted on the cruise, e.g., process, survey or broadscale. dimensionless
haul_idHaul number, submitted by PI as tow. dimensionless
latLatitude in decimal degrees. decimal degrees
lonLongitude in decimal degrees where negative values denote West of the prime meridian. decimal degrees
yrday0_localDay of year at local time, where Jan1 is day zero. dimensionless
day_localDay of month in local time. dimensionless
month_localMonth of year in local time. dimensionless
time_localLocal time of observation or tow, originally reported as EDST (Eastern Daylight Savings Time). hhmm
length_dayNumber of hours between civil sunrise and civil sunset, originally reported as day_length. decimal hours
temp_avgAverage temperature, as observed by a CTD unit, "primary sensor", ITS 68 or 90 scale, reported in degrees C. For BONGO: average of measurements recorded from 60m to surface. Degrees celsius
sal_avgAverage salinity, calculated from the CTD "primary sensors" of conductivity and temperature, Practical Salinity Scale, dimensionless. For BONGO: average of measurements recorded from 60m to surface. dimensionless
sigma_t_avgAverage sigma-t density, in kg/m3 - 1000. For BONGO: average of measurements recorded from 60m to surface. kg/m^3 - 1000
depth_wWater depth in meters. meters
depth_tow_maxMaximum depth of a towed instrument. meters
sampleUnique identifier for obtained samples. dimensionless
lengthLength of dead larval specimen, originally reported as larva_len. mm
common_nameCommon name of sample, originally reported as species. Cod = Atlantic cod (Gadus morhua) and haddock is Melanogrammus aeglefinus. dimensionless
size_classLarval size groupings (classes), based on actual or predicted protein content of a larva. If pro 1200 then size_class=4. dimensionless
prot_totalTotal amount of protein in a larva. micrograms
RNATotal amount of RNA in a larva. micrograms
DNATotal amount of DNA in a larva. micrograms
ringsTotal number of visible rings on an otolith, beginning at the hatch check or nucleus. dimensionless
sagitta_diamTotal diameter of sagitta otolith as measured with microscope micrometer; originally reported as sag_diam. microns
sagitta_chk_diamDiameter of sagitta otolith up to the hatch check (nucleus) measured with microscope micrometer; originally reported as sag_chk_diam. microns
lapillus_diamTotal diameter of lapillus otolith, measured with microscope micrometer; originally reported as lap_diam. microns
growthInstantaneous protein-specific growth rate (G per day) estimated from G = -0.147 + 0.009(avg_temp)+ 0.045(sRD), where sRD is the standardized ratio of RNA to DNA (reported in the data as RNA_DNA). Equation had been validated for cod and haddock larvae with protein content G per day
RNA_DNAThe ratio of RNA to DNA standardized to a DNA/RNA standard curve slope ratio of 2.43; originally reported as srd. dimensionless
prot_predictedPredicted total amount of protein in larvae missing protein data. For cod, predicted protein = (20.67*DNA) + 2.91. For haddock, predicted protein = (20.01*DNA) - 3.22. This parameters was originally reported as predict_pro. micrograms


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Instruments

Dataset-specific Instrument Name
Bongo Net
Generic Instrument Name
Bongo Net
Dataset-specific Description
Bong nets used during this study were simple paired plankton nets, towed double-obliquely through the water column.  Net diameter was 61 cm with 333 and 505 micrometer mesh size.  Nets used during sampling were not capable of discrete "known-depth" sampling.
Generic Instrument Description
A Bongo Net consists of paired plankton nets, typically with a 60 cm diameter mouth opening and varying mesh sizes, 10 to 1000 micron. The Bongo Frame was designed by the National Marine Fisheries Service for use in the MARMAP program. It consists of two cylindrical collars connected with a yoke so that replicate samples are collected at the same time. Variations in models are designed for either vertical hauls (OI-2500 = NMFS Pairovet-Style, MARMAP Bongo, CalVET) or both oblique and vertical hauls (Aquatic Research). The OI-1200 has an opening and closing mechanism that allows discrete "known-depth" sampling. This model is large enough to filter water at the rate of 47.5 m3/minute when towing at a speed of two knots. More information: Ocean Instruments, Aquatic Research, Sea-Gear

Dataset-specific Instrument Name
CTD Sea-Bird SEACAT 19
Generic Instrument Name
CTD Sea-Bird SEACAT 19
Dataset-specific Description
The CTD was attached on the wire above the Bongo frame.
Generic Instrument Description
The Sea-Bird SBE 19 SEACAT Recorder measures conductivity, temperature, and pressure (depth). The SEACAT is self-powered and self-contained and can be deployed in profiling or moored mode. The SBE 19 SEACAT was replaced in 2001 by the 19plus. more information from Sea-Bird Electronics


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Deployments

AL9306

Website
Platform
R/V Albatross IV
Report
Start Date
1993-05-18
End Date
1993-05-29
Description
process

SJ9503

Website
Platform
R/V Seward Johnson
Start Date
1995-03-14
End Date
1995-03-24
Description
process larvae

SJ9505

Website
Platform
R/V Seward Johnson
Report
Start Date
1995-04-07
End Date
1995-04-21
Description
Process cruise looking for cod and haddock larvae.

SJ9507

Website
Platform
R/V Seward Johnson
Report
Start Date
1995-05-08
End Date
1995-05-26
Description
process larvae

OC301

Website
Platform
R/V Oceanus
Report
Start Date
1997-04-05
End Date
1997-04-17
Description
process fish vital rates

OC303

Website
Platform
R/V Oceanus
Report
Start Date
1997-05-06
End Date
1997-05-23
Description
process

EL9904

Website
Platform
R/V Edwin Link
Report
Start Date
1999-04-14
End Date
1999-04-28
Description
process

EL9905

Website
Platform
R/V Edwin Link
Report
Start Date
1999-05-10
End Date
1999-05-29
Description
process

AL9403II

Website
Platform
R/V Albatross IV
Report
Start Date
1994-05-17
End Date
1994-05-28
Description
process


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Project Information

U.S. GLOBEC Georges Bank (GB)


Coverage: Georges Bank, Gulf of Maine, Northwest Atlantic Ocean


The U.S. GLOBEC Georges Bank Program is a large multi- disciplinary multi-year oceanographic effort. The proximate goal is to understand the population dynamics of key species on the Bank - Cod, Haddock, and two species of zooplankton (Calanus finmarchicus and Pseudocalanus) - in terms of their coupling to the physical environment and in terms of their predators and prey. The ultimate goal is to be able to predict changes in the distribution and abundance of these species as a result of changes in their physical and biotic environment as well as to anticipate how their populations might respond to climate change.

The effort is substantial, requiring broad-scale surveys of the entire Bank, and process studies which focus both on the links between the target species and their physical environment, and the determination of fundamental aspects of these species' life history (birth rates, growth rates, death rates, etc).

Equally important are the modelling efforts that are ongoing which seek to provide realistic predictions of the flow field and which utilize the life history information to produce an integrated view of the dynamics of the populations.

The U.S. GLOBEC Georges Bank Executive Committee (EXCO) provides program leadership and effective communication with the funding agencies.



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Program Information

U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)


Coverage: Global


U.S. GLOBEC (GLOBal ocean ECosystems dynamics) is a research program organized by oceanographers and fisheries scientists to address the question of how global climate change may affect the abundance and production of animals in the sea.

The U.S. GLOBEC Program currently had major research efforts underway in the Georges Bank / Northwest Atlantic Region, and the Northeast Pacific (with components in the California Current and in the Coastal Gulf of Alaska). U.S. GLOBEC was a major contributor to International GLOBEC efforts in the Southern Ocean and Western Antarctic Peninsula (WAP).



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Funding

Funding SourceAward
National Science Foundation (NSF)
National Oceanic and Atmospheric Administration (NOAA)

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