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Integrated Age-based Krill Model Fish Res 2015

Metadata Updated: March 1, 2024

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.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date February 29, 2024
Metadata Created Date October 15, 2021
Metadata Updated Date March 1, 2024
Reference Date(s) 1981 (creation), 2014 (publication)
Frequency Of Update

Metadata Source

Harvested from NMFS SWFSC

Additional Metadata

Resource Type Dataset
Metadata Date February 29, 2024
Metadata Created Date October 15, 2021
Metadata Updated Date March 1, 2024
Reference Date(s) 1981 (creation), 2014 (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:36841
Access Constraints Cite As: Southwest Fisheries Science Center, [Date of Access]: Integrated Age-based Krill Model Fish Res 2015 [Data Date Range],, Access Constraints: None, Use Constraints: None, 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.
Bbox East Long -43
Bbox North Lat -58
Bbox South Lat -65
Bbox West Long -64
Coupled Resource
Frequency Of Update
Harvest Object Id 0d87ce20-2bfb-4f7d-b9c6-4a8cf5cec742
Harvest Source Id bc62ff6c-c119-4409-94c7-7dd202b24462
Harvest Source Title NMFS SWFSC
Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
Lineage 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.
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-64.0, -65.0], [-43.0, -65.0], [-43.0, -58.0], [-64.0, -58.0], [-64.0, -65.0]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1981
Temporal Extent End 2014

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