AFSC/ABL: Juvenile rockfish DNA species identification
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.
Resources
4 resources available
-
https://console.cloud.google.com/storage/browser/_details/nmfs_odp_afsc/ABL/Juvenile%20rockfish%20DNA%20species%20identification_ID_17252.csv
CSV -
NOAA Data Management Plan (DMP)
PDF -
GCMD Keyword Forum Page
TEXT/HTML -
Full Metadata Record
TEXT/HTML
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| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{
"fn": "Kondzela, Chris",
"@type": "vcard:Contact",
"hasEmail": "mailto:chris.knodzela@noaa.gov"
}
|
| describedByType | application/octet-steam |
| description | 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. |
| distribution |
[
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"title": "https://console.cloud.google.com/storage/browser/_details/nmfs_odp_afsc/ABL/Juvenile%20rockfish%20DNA%20species%20identification_ID_17252.csv",
"format": "CSV",
"mediaType": "text/csv",
"description": "Note: Dataset migrated by Dan Woodrich (AFSC data management coordinator) on 12/14/2021. Contact: Daniel.woodrich@noaa.gov",
"downloadURL": "https://console.cloud.google.com/storage/browser/_details/nmfs_odp_afsc/ABL/Juvenile%20rockfish%20DNA%20species%20identification_ID_17252.csv",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "NOAA Data Management Plan (DMP)",
"format": "PDF",
"mediaType": "application/pdf",
"description": "NOAA Data Management Plan for this record on InPort.",
"downloadURL": "https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/17252.pdf",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "GCMD Keyword Forum Page",
"accessURL": "https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords",
"mediaType": "text/html",
"description": "Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "Full Metadata Record",
"accessURL": "https://www.fisheries.noaa.gov/inport/item/17252",
"mediaType": "text/html",
"description": "View the complete metadata record on InPort for more information about this dataset.",
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|
| identifier | https://data.noaa.gov/waf/NOAA/nmfs/afsc/iso/xml/17252.xml |
| issued | 2007-12-01T00:00:00.000+00:00 |
| keyword |
[
"Alaska",
"Gulf of Alaska",
"DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
"Auke Bay Laboratories"
]
|
| landingPage | https://www.fisheries.noaa.gov/inport/item/17252 |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2007-12-01T00:00:00.000+00:00 |
| publisher |
{
"name": "Alaska Fisheries Science Center",
"@type": "org:Organization"
}
|
| references |
[
"https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/17252.pdf"
]
|
| rights | otherRestrictions, unclassified |
| spatial | -135.7,55.8,-151.2,58.5 |
| temporal | 1998-01-01T00:00:00+00:00/2002-01-01T00:00:00+00:00 |
| title | AFSC/ABL: Juvenile rockfish DNA species identification |
