gov.noaa.nmfs.inport:17262 eng UTF8 dataset MS Excel Spreadsheet Alaska Fisheries Science Center 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA https://www.afsc.noaa.gov WWW:LINK-1.0-http--link Website Website for this organization information 0700-1700 Pacific Time resourceProvider 2026-03-04T19:17:22 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) AFSC/ABL: 1996 Brood year Steelhead growth and early life-history transitions AFSC/ABL: 1996 Brood year Steelhead growth and early life-history transitions 2004-12-01 publication NOAA/NMFS/EDM 17262 https://www.fisheries.noaa.gov/inport/item/17262 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information Gray, Andrew andrew.gray@noaa.gov originator documentDigital Heritabilities of growth, precocious maturation and smolting were measured in 75 families of juvenile steelhead or rainbow trout Oncorhynchus mykiss, progeny of within and between line matings (crosses) of wild, anadromous steelhead and wild, resident (lake) rainbow trout originally derived from the same anadromous stock 70 years earlier. The tagged yearling progeny were combined by line in common freshwater rearing containers and graded into three categories: mature, smolt or rearing (undifferentiated) at age 2 years. Heritabilities of precocious male maturity, smolting and growth were moderate to high, and the genetic correlation between growth and smolting was low. Smolting and precocious male maturity were highly variable among families within lines and significantly different between lines. Each of the four lines produced significant numbers of smolts at age two. Smolting and maturation were negatively genetically correlated, which may explain the persistence of smolting in the lake population despite strong selection against lake smolts; balancing selection on male maturation age may help to maintain variation for smolting. The high heritability of smolting, coupled with the inability of smolts that leave the lake to return to it indicates that the genetic potential for smolting can lie dormant or be maintained through a dynamic interaction between smolting and early maturation for decades despite complete selection against the phenotype. The results have significant implications for the preservation of threatened anadromous stocks in fresh water and the inclusion of resident fish of formerly anadromous populations, currently trapped behind long-standing barriers to migration, as one component of the same population. This dataset contains information for each fish including paretal cross type, lifestage at age 2, length and weight, and growth rates. The results have significant implications for the preservation of threatened anadromous stocks in fresh water and the inclusion of resident fish of formerly anadromous populations, currently trapped behind long-standing barriers to migration, as one component of the same population. completed Gray, Andrew andrew.gray@noaa.gov pointOfContact Gray, Andrew andrew.gray@noaa.gov custodian notPlanned AK Alaska Little Port Walter place Geographic Names Information System Oncorhynchus mykiss growth heritability maturation precocious smolting steelhead theme DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page 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 information custodian Auke Bay Laboratories project InPort otherRestrictions Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/ABL: 1996 Brood year Steelhead growth and early life-history transitions [Data Date Range], https://www.fisheries.noaa.gov/inport/item/17262. 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. otherRestrictions Access Constraints: Contact the Point of Contact for data request form. The Data set is still being analyzed and will not be available for distribution until it has been finalized and all QA/QC practices have been performed. Contact the Data Point of Contact for estimated time of release. otherRestrictions 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. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 17262 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/17262.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US biota Microsoft Excel spreadsheet -134.6433 -134.6333 56.38417 56.39417 Little Port Walter, Alaska 1996 1998 Gray, Andrew andrew.gray@noaa.gov distributor https://console.cloud.google.com/storage/browser/_details/nmfs_odp_afsc/ABL/1996%20Brood%20year%20Steelhead%20growth%20and%20early%20life-history%20transitions_ID_17262.csv WWW:LINK-1.0-http--link https://console.cloud.google.com/storage/browser/_details/nmfs_odp_afsc/ABL/1996%20Brood%20year%20Steelhead%20growth%20and%20early%20life-history%20transitions_ID_17262.csv NCEI to be determined Note: Dataset migrated by Dan Woodrich (AFSC data management coordinator) on 12/14/2021. Contact: Daniel.woodrich@noaa.gov download dataset Completeness Report None Contact the dataset POC for full methodology