Table of Contents

• Dataset Description
  • Methods & Sampling
  • Data Processing Description
• Data Files
• Parameters
• Instruments
• Deployments
• Project Information
• Program Information
• Funding

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. 

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.

• 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:

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.

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).