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Bluefin Tuna Ecology
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2014
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F. G. Walton Smith
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Project Title: |
Climate Impacts on Larval Atlantic Bluefin Tuna Ecology in the Gulf of Mexico |
Project Status: |
Submitted |
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Principal Investigator: |
John Lamkin, NOAA/SEFSC |
Project Institution: |
NOAA/SEFSC |
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Project ID: |
104304 |
Version #: |
1 |
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Date Submitted: |
2/28/2014 3:33:00 PM |
Created By: |
Aras Zygas |
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Date Last Modified: |
2/28/2014 3:33:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NOAA/NMFS - NONE - Funded
NASA - NONE - Funded |
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Summary of Field Work: |
SEAMAP Larval Indices of spawning stock abundance for select resource species in the Gulf of Mexico are based on the abundance and occurrence of their larvae. However, all species respond to climate drivers in ways that impact recruitment and survival. Bluefin in particular may be impacted by inter-annual, decadal or longer changes in climate regimes. These various climate drivers are of concern to ICCAT as their effects on recruitment determine the Stock-Recruitment Relationship, and the validity of the larval index. The stock-recruitment relationship, (SRR), is the relationship between the number of spawning fish in a population and the number of young fish they produce. This relationship is used by NMFS and ICCAT scientists to project future population sizes of bluefin tuna, and to evaluate the status of the population relative to the established rebuilding target. In the case of the western population of ABT, scientists use two divergent SRRs in their projections: the high recruitment scenario, which predicts that recruitment will increase as the number of adults increases up to a point; and the low recruitment scenario, or LRS, which suggests an environmental regime shift that permanently reduced the number of young that recruit into the fishery even if the number of adults increases. This poses a significant challenge for managers because the two scenarios produce opposing assessments of stock status and conflicting results related to appropriate quotas and rebuilding targets necessary to achieve a healthy population. This series of cruises is designed to collect data that will address this conundrum and provide an insight into the recruitment process to help determine the correct SSR currently controlling the western Atlantic bluefin stock. Using real time satellite imagery, areas identified as “frontal zones” will be targeted for biological and physical sampling. As these areas are the most productive in the Gulf of Mexico, targeting these areas are critical. We expect to collect approximately 100 SEAMAP neuston tows/samples; 150 Spanish neuston tows/samples; 25, 1m MOCNESS tows (yielding 125 samples); 100 plankton tows/200 samples; 1100 CUFES (continuous underway fish egg sampler) samples. Chlorophyll a measurements (measured with bench-top fluorometer): 98 stations x 3 depths x 3 replicates = 882; CTD casts: 750 isotope samples (carbon and nitrogen isotopes) |
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Summary of Facility Requirements: |
SCS network, VHF Radio, e-mail, PC Support, ADCP, GPS, Satellite Imagery, Simrad EK60, wire/cable metering capability, NMEA GPS input to CTD header file, CTD SBE9(Temp. SBE03-02/F, Conductivity SBE 04-02/0, Pressure 410K-105, DO SBE43, Transmissometer and Fluorometer), CTD Deck Unit SBE11+ TSG SBE21, EK500; hydrographic winch, EM wire and meter readout to accomplish CTD/bottle casts/bongo tows to 200m; Carousal for water bottles; SBE 19 Seacat profiler for real time depth display for bongo tow; additional winch with EM wire for deployment of 1 m MOCNESS, trawl winch for juvenile fish trawl deployment; SBE 21 thermosalinograph and Turner 10-AU Fluorometer associated with the flow-through system, Electronics technician and an experienced Deck support for gear deployment |
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Summary of other requirements and comments: |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1006875 |
Created By: |
Aras Zygas |
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Date Last Modified: |
2/28/2014 3:33:00 PM |
Date Submitted: |
2/28/2014 3:33:00 PM |
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Year: |
2014
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Ship/Facility: |
F. G. Walton Smith
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Optimum Start Date:
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4/27/2014 |
Dates to Avoid: |
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Earliest Start Date: |
4/15/2014 |
Multi-Ship Op: |
No |
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Latest Start Date: |
5/1/2014 |
Other Ship(s): |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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23 |
1 |
1 |
4 |
29 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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Description of Repeating cruise requirements: |
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Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
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Short Description of Op Area
for use in schedules: |
Gulf of Mexico |
| Description of Op Area: |
Northern and Southern Gulf of Mexico |
| Op Area Size/Dia.: |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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25.7316° N
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80.161938° W
map
25° 43.896' N
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80° 9.71628' W
map
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Ending
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25.7316° N
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80.161938° W
map
25° 43.896' N
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80° 9.71628' W
map
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
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 Important Info on Foreign Research Clearances
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Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?
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No |
If yes, have you applied for the necessary permits through your export control office?
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No |
| Questions about ITAR/EAR regulations?
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Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Miami, FL, USA |
Key West, FL, USA, Pascagoula, MS, USA |
Miami, FL, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
Due to the duration of the cruise it is expected that at least one intermediate port call will be necessary to replenish supplies and change out scientific parties. The intermediate ports listed in this request are possibilities based on previous surveys. The actual port calls will depend on the survey's operating area and timing yet to be determined. |
Important Info on Working in Foreign Ports
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Chief Scientist: |
John Lamkin, NOAA/SEFSC |
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# in Science Party |
12 |
# of different science teams |
2 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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1 |
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Explanation of Science Party Requirements and Technician Requirements |
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 Dynamic Positioning |  ADCP | Multibeam | Seismic |
| Dredging/Coring/Large Dia. Trawl Wire | Stern A-frame | Fiber Optic (.681) | 0.680 Coax Wire |
| SCUBA Diving | Radioisotope use - briefly describe | NO Radioisotope use/Natural level work | Other Operator Provided Inst. - Describe |
| 0 PI-Provided Vans - briefly describe | MOCNESS | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
SCS network, VHF Radio, e-mail, PC Support, ADCP, GPS, Satellite Imagery, Simrad EK60, wire/cable metering capability, NMEA GPS input to CTD header file, CTD SBE9(Temp. SBE03-02/F, Conductivity SBE 04-02/0, Pressure 410K-105, DO SBE43, Transmissometer and Fluorometer), CTD Deck Unit SBE11+ TSG SBE21, EK500; hydrographic winch, EM wire and meter readout to accomplish CTD/bottle casts/bongo tows to 200m; Carousal for water bottles; SBE 19 Seacat profiler for real time depth display for bongo tow; additional winch with EM wire for deployment of 1 m MOCNESS, trawl winch for juvenile fish trawl deployment; SBE 21 thermosalinograph and Turner 10-AU Fluorometer associated with the flow-through system
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
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