Habitat Mapping Cruise - Tunicates (HB0806, EK60)
Objectives: Use otter trawls (if available), beam trawls (if not), Naturalist Dredge,
SEABOSS photography/bottom grab equipment, CTDs, and large (10-30 liter) Niskin water
bottles and ship?s ADCP to conduct the following operations: 1) determine changes
in distribution and condition of invasive colonial tunicate Didemnum vexillum on northern
Georges Bank gravel habitat, and also northeast of Great South Channel; 2) document
the influence other ecosystem components, substrates, hydrology, and disturbances,
including fishing disturbances on tunicate-benthic/demersal stock interactions; 3)
collect tunicate specimens for further study including DNA analysis, and collect near-bottom
water samples in tunicate areas; 4) explore the function of a newly-discovered benthic/demersal
community not influenced by trawling or tunicate colonization, 5) continue monitoring
recovery and productivity of untrawled gravel habitats in HAPC on northeastern Georges
Bank, as compared to nearby trawled habitats; also, time permitting, and 6) re-occupy
existing stations and sample new stations on a transect from the northeast corner
of NLCA to outside the eastern boundary of NLCA.
- Cite as: Northeast Fisheries Science Center (2008): Water Column Sonar Data Collection (HB0806, EK60). National Centers for Environmental Information, NOAA. doi:10.7289/V52Z13G8 [access date]
- HB0806_Leg01
- doi:10.7289/V52Z13G8
gov.noaa.ngdc.mgg.wcd:HB0806_EK60
Search Data |
|
Distribution Formats |
|
Ordering Instructions | Contact the Water Column Sonar Data Manager to order data |
Distributor | Water Column Sonar Data Manager NOAA National Centers for Environmental Information (303) 497-4742 wcd.info@noaa.gov |
Dataset Principal Investigator | Vincent Guida Research Fisheries Biologist NEFSC 732-872-3020 vincent.guida@noaa.gov |
Time Period | 2008-08-08T22:14:23 to 2008-08-25T13:36:11 |
Spatial Reference System | urn:ogc:def:crs:EPSG:4326 |
Spatial Bounding Box Coordinates |
West:-72.4870258746
East:-67.1413664333
South:39.27613
North:42.131197327
|
Spatial Coverage Map |
Documentation links not available. |
Publication Dates |
|
Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Not planned |
Purpose | Benthic and demersal mapping of the Georges Bank area using acoustic and sampling technology to monitor and measure tunicates. |
Use Limitations |
|
Dataset Citation |
|
Custodians |
|
Resource Providers |
|
Points of Contact |
|
Publishers |
|
Theme keywords | Global Change Master Directory (GCMD) Science Keywords
|
Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
|
Instrument keywords | Global Change Master Directory (GCMD) Instrument Keywords
|
Place keywords | International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas"
publication S-23)
|
Use Constraints |
|
Access Constraints |
|
Fees |
|
Processor |
|
Processing Steps |
|
Instrument |
|
Platform |
|
Operation |
|
Last Modified: 2017-05-30
For questions about the information on this page, please email:wcd.info@noaa.gov