Integrated Age-based Krill Model Fish Res 2015
Southwest Fisheries Science Center
Data Set
(DS)
| ID: 36841
| Published / External
Created: 2017-02-21
|
Last Modified: 2023-08-15
Project (PRJ) | ID: 31076
ID: 36841
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | Integrated Age-based Krill Model Fish Res 2015 |
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Short Name | |
* Status | Completed |
Creation Date | 1981 |
Revision Date | |
• Publication Date | 2014 |
* » Abstract |
An integrated, age-structured model was fitted to different combinations of survey data using two forms of selectivity (logistic or double-logistic) with time-constant or annually varying selectivity to investigate the population dynamics of Antarctic krill (Euphausia superba) near the Antarctic Peninsula. The data were from surveys conducted by the U.S. Antarctic Marine Living Resources Program around the South Shetland Islands from 1992 to 2011. Two indices of krill biomass based on (1) trawl-net samples and (2) hydroacoustic sampling were combined with length-compositions from the nets. Sixteen model configurations using different combinations of the two biomass surveys with the various options for modeling selectivities were examined. |
* Purpose |
An integrated, age-structured model was fitted to different combinations of survey data using two forms of selectivity (logistic or double-logistic) with time-constant or annually varying selectivity to investigate the population dynamics of Antarctic krill (Euphausia superba) near the Antarctic Peninsula. The data were from surveys conducted by the U.S. Antarctic Marine Living Resources Program around the South Shetland Islands from 1992 to 2011. Two indices of krill biomass based on (1) trawl-net samples and (2) hydroacoustic sampling were combined with length-compositions from the nets. Sixteen model configurations using different combinations of the two biomass surveys with the various options for modeling selectivities were examined. |
Notes | |
Other Citation Details |
This analyses conducted are described in Kinzey, D., G. M. Watters, C. S. Reiss. 2015. Selectivity and two biomass measures in an age-based assessment of Antarctic krill (Euphausia superba). FishRes 168:72-84. This paper is made available as part of the dataset and fully describes the methods, data and results. |
• Supplemental Information | |
DOI (Digital Object Identifier) | |
DOI Registration Authority | |
DOI Issue Date |
Keywords
Theme Keywords
Thesaurus | Keyword |
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None | acoustics |
None | ADMB |
None | AMLR |
None | bathymetry |
None | benthic |
None | bioacoustic |
None | biomass |
None | CCAMLR |
None | ecosystem |
None | hydroacoustic |
None | IKMT |
None | krill |
None | marine |
None | MOCNESS |
None | population |
None | RMT8 |
None | surveys |
None | trawl |
None | weather |
Temporal Keywords
Thesaurus | Keyword |
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* Spatial Keywords
Thesaurus | Keyword |
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None | Admiralty Bay |
None | Antarctic |
None | Antarctica |
None | Bransfield Strait |
None | Cape Shirreff |
None | Chile |
None | Clarence Island |
None | Copacabana |
None | Deception Island |
None | Drake Passage |
None | Elephant Island |
None | King George Island |
None | Livingston Island |
None | Peninsula |
None | San Telmo Islands |
None | Seal Island |
None | South Shetlands |
Stratum Keywords
Thesaurus | Keyword |
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Instrument Keywords
Thesaurus | Keyword |
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Platform Keywords
Thesaurus | Keyword |
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Physical Location
• » Organization | Southwest Fisheries Science Center |
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• » City | La Jolla |
• » State/Province | CA |
• Country | USA |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
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• Data Set Type | Mixed |
• Maintenance Frequency | |
Maintenance Note | |
» Data Presentation Form | models, code, data |
• Entity Attribute Overview | |
Entity Attribute Detail Citation | |
Entity Attribute Detail URL | |
Distribution Liability |
Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the National Marine Fisheries Service, US AMLR or its partners. |
Data Set Credit | US Antarctic Marine Living Resources Program, NOAA |
Support Roles
* » Support Role | Data Steward |
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* » Date Effective From | 2019 |
Date Effective To | |
Person | Woodman, Sam |
Address |
8901 La Jolla Shores Dr La Jolla, CA 92037 USA |
Email Address | sam.woodman@noaa.gov |
Phone | 858-546-7138 |
Fax | |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | Distributor |
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* » Date Effective From | 2019 |
Date Effective To | |
Organization | Southwest Fisheries Science Center (SWFSC) |
Address |
8901 La Jolla Shores Dr. La Jolla, CA 92037 USA |
Email Address | |
Phone | (858)546-7000 |
Fax | |
Mobile | |
URL | http://swfsc.noaa.gov/ |
Business Hours | 8:00-16:30 |
Contact Instructions |
* » Support Role | Metadata Contact |
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* » Date Effective From | 2019 |
Date Effective To | |
Person | Kinzey, Doug |
Address |
8901 La Jolla Shores Dr La Jolla, CA 92037 USA |
Email Address | doug.kinzey@noaa.gov |
Phone | 858-546-5601 |
Fax | |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | Point of Contact |
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* » Date Effective From | 2019 |
Date Effective To | |
Person | Kinzey, Doug |
Address |
8901 La Jolla Shores Dr La Jolla, CA 92037 USA |
Email Address | doug.kinzey@noaa.gov |
Phone | 858-546-5601 |
Fax | |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | |
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* » Date Effective From | |
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* » Contact | |
* Contact Instructions |
* » Support Role | |
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* » Date Effective From | |
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* » Date Effective From | |
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* Contact Instructions |
Extents
Currentness Reference |
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Extent Group 1
Extent Description |
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Extent Group 1 / Geographic Area 1
* » W° Bound | -64 |
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* » E° Bound | -43 |
* » N° Bound | -58 |
* » S° Bound | -65 |
* » Description |
FAO Area 48.1, CCAMLR Area 48.1, Antarctic Peninsula, South Shetland Islands, South Orkney Islands |
Extent Group 1 / Vertical Extent
EPSG Code | |
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Extent Group 1 / Time Frame 1
* » Time Frame Type | Range |
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* » Start | 1981 |
End | 2014 |
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Alternate End As Of Info | |
Description |
Spatial Information
Spatial Resolution
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Spatial Representation
Grid Representation Used? | |
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Text / Table Representation Used? | |
TIN Representation Used? | |
Stereo Model Representation Used? | |
Video Representation Used? |
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Reference Systems
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Access Information
Data License | |
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Data License URL | |
Data License Statement | |
* » Security Class | Unclassified |
* Security Classification System | |
Security Handling Description | |
• Data Access Policy |
Available upon request; response time varies based on data management resources available at the time of the request. |
» Data Access Procedure |
Contact AMLR Point of Contact if further guidance is needed. |
• » Data Access Constraints |
None |
• Data Use Constraints |
None |
Metadata Access Constraints |
None |
Metadata Use Constraints |
None |
Distribution Information
Start Date | |
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» Download URL | |
Distributor | Southwest Fisheries Science Center (SWFSC) (2019 - Present) |
File Name | Integrated Age-based Krill Model Fish Res 2015 |
Description | |
File Date/Time | |
File Type (Deprecated) | Zip |
Distribution Format | |
File Size | |
Application Version | |
Compression | Zip |
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URLs
URL | https://www.fisheries.noaa.gov/about/antarctic-ecosystem-research-division-southwest-fisheries-science-center |
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Name | US AMLR Stock Assessments |
URL Type | Online Resource |
File Resource Format | |
Description |
Stock assessments to estimate the status and productivity of biological populations are a central tool in the management of the harvesting of living resources. These methods are used to determine sustainable catch levels that can be demonstrated to meet long-term management criteria. |
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Issues
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Issue |
Technical Environment
Description |
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Data Quality
Representativeness | |
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Accuracy |
Echosounders are calibrated to industry standards. |
Analytical Accuracy | |
Horizontal Positional Accuracy | |
Vertical Positional Accuracy | |
Quantitation Limits | |
Bias | |
Comparability | |
Completeness Measure | |
Precision | |
Analytical Precision | |
Field Precision | |
Sensitivity | |
Detection Limit | |
Completeness Report | |
Conceptual Consistency | |
» Quality Control Procedures Employed |
Industry standards are applied. |
Data Management
» Have Resources for Management of these Data Been Identified? | No |
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» Approximate Percentage of Budget for these Data Devoted to Data Management | Unknown |
» Do these Data Comply with the Data Access Directive? | No |
» Is Access to the Data Limited Based on an Approved Waiver? | No |
» If Distributor (Data Hosting Service) is Needed, Please Indicate | |
» Approximate Delay Between Data Collection and Dissemination | Two years |
» If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed | |
» Actual or Planned Long-Term Data Archive Location | NCEI-CO |
» Approximate Delay Between Data Collection and Archiving | Two years |
» How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive? |
Data are stored on a server at the Southwest Fisheries Science Center which has all appropriate access controls. |
Lineage
» Lineage Statement |
Raw acoustic data are collected from calibrated echosounders and archived on the vessel and later on shore-based servers. Samples from nets are processed on board the vessel, and descriptive information is entered into data logs and/or databases. All datasets are ultimately returned to the SWFSC for QA/QC, archiving and review. |
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Acquisition Information
Instruments
Identifier | Isaac-Kidd Midwater Trawl (IKMT) |
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Docucomp UUID | |
Instrument / Gear | Gear |
Instrument Type | Trawl Nets |
Description |
The Isaacs-Kidd Midwater Trawl (IKMT) is used to collect deep water biological specimens larger than those taken by standard plankton nets. The mouth of the net is attached to a wide, V-shaped, rigid diving vane that keeps the mouth of the net open and maintains the net at depth for extended periods |
Identifier | MOCNESS |
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Docucomp UUID | |
Instrument / Gear | Gear |
Instrument Type | Plankton Nets |
Description |
The Multiple Opening/Closing Net and Environmental Sensing System (MOCNESS) uses a stepping motor to sequentially control the opening and closing of individual nets to obtain discrete depth tow data. The MOCNESS uses underwater and shipboard electronics for controlling the device. The electronics system continuously monitors the functioning of the nets, frame angle, horizontal velocity, vertical velocity, volume filtered, and selected environmental parameters such as salinity and temperature. |
Identifier | Simrad EM3000 |
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Docucomp UUID | ac77b0a7-7efd-4f26-9a25-d2aaca06c9ba |
Instrument / Gear | Instrument |
Instrument Type | Multibeam Echosounder |
Description |
The EM 3000 multibeam echo sounder is a very high resolution seabed mapping and inspection system with respect to high accuracy and resolution. The minimum operating depth is from less than 1 m below its transducers, and in typical sea water conditions the system operates to more than 150 m depth (less in warm water and more in fresh water). Small dimensions and low weight makes the system portable and easy to install. This allows use on survey launches and subsea vehicles to 1500 m water depth. The EM 3000 system has a very high ping rate of up to 40 Hz, a large number of measurements per ping (typically about 120), 1.5 degrees beamwidth, and electronic pitch stabilization of the transmit beam. 100% coverage of the bottom is achievable at vessel speeds of about 10 knots in shallow waters with acrosstrack coverage of up to four times depth beneath the transducers with a basic system. At longer range the achievable coverage may be up to 200 m, and 100% coverage is achievable with vessel speeds up to 20 knots. The EM 3000 may be configured to use two sets of transducers (Sonar Heads). This increases the shallow water coverage to up to ten times the depth, and the number of measurements per ping to typically 220. With an angular coverage sector of nominally 200 degrees the dual system also allows surveying to the water surface along shorelines, river banks and man-made structures. The system sonar frequency is 300 kHz allowing small dimensions, good range capability and high tolerance to turbid waters. Integrated seabed acoustical imaging capability (like a sidescan sonar) is included as standard. A nearfield mode is available for increased resolution at very short ranges (less than 4 m). A combination of phase and amplitude bottom detection algorithm is used, resulting in a measurement accuracy of 5 cm RMS being achievable practically independent of beam pointing angle. The EM 3000 multibeam system was in production from 1996 to 2004 and was replaced with the EM 3002. |
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Platforms
Identifier | Charter vessels-small boats | ||||||
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Docucomp UUID | |||||||
Description |
various vessels ranging in size (20-40 ft length) chartered for cetacean surveys when a NOAA small boat is not available. |
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FAQs
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Child Items
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Related Items
Item Type | Relationship Type | Title |
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Catalog Details
Catalog Item ID | 36841 |
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Metadata Record Created By | Stephanie Sexton |
Metadata Record Created | 2017-02-21 19:07+0000 |
Metadata Record Last Modified By | SysAdmin InPortAdmin |
» Metadata Record Last Modified | 2023-08-15 17:09+0000 |
Metadata Record Published | 2017-03-09 |
Owner Org | SWFSC |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2017-03-09 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2018-03-09 |
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