AFSC/ABL: Juvenile rockfish DNA species identification

Metadata Updated: March 26, 2021

Many pelagic juvenile rockfish (Sebastes) were collected in juvenile salmonid surveys in the Gulf of Alaska (GOA) from 1998 to 2002. Often species identification of rockfish is difficult or impossible at this stage of development (20 to 40 mm), and the juveniles of only a few species indigenous to Alaska waters have been described. These collections are samples of the first large aggregations observed in GOA waters and provided an opportunity to document the occurrence of several species of rockfish. Using mtDNA markers developed to identify rockfish species, we were able to identify unequivocally four species (Sebastes alutus, S. aleutianus, S. borealis, S. reedi) from subsamples of the collections. Other individuals were assigned to groups of two or three species. Using morphological data alone, we identified S. boreaslis, S. crameri, and S. reedi. The other species were initially indistinguishable by their morphology from S. alutus. The combined genetic and morphological data successfully resolved the other species as S. entomelas and probably s. ciliatus/variabilis, although S. polyspinis cannot be ruled out. In addition to documenting the presence of these species in the GOA, the results provide useful information for identifying pelagic juvenile rockfishes in surveys targeting this early life history stage.

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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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Dates

Metadata Date March 18, 2021
Metadata Created Date November 12, 2020
Metadata Updated Date March 26, 2021
Reference Date(s) December 1, 2007 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NMFS AFSC

Additional Metadata

Resource Type Dataset
Metadata Date March 18, 2021
Metadata Created Date November 12, 2020
Metadata Updated Date March 26, 2021
Reference Date(s) December 1, 2007 (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:17252
Access Constraints Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/ABL: Juvenile rockfish DNA species identification [Data Date Range], https://www.fisheries.noaa.gov/inport/item/17252., Access Constraints: There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed. | Use Constraints: User must read and fully comprehend the metadata prior to use. Data should not be used beyond the limits of the source scale. Acknowledgement of NOAA, as the source from which these data were obtained, in any publications and/or other representations of these data is suggested.
Bbox East Long -135.7
Bbox North Lat 58.5
Bbox South Lat 55.8
Bbox West Long -151.2
Coupled Resource
Frequency Of Update notPlanned
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.
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-151.2, 55.8], [-135.7, 55.8], [-135.7, 58.5], [-151.2, 58.5], [-151.2, 55.8]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1998
Temporal Extent End 2002

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