AFSC/ABL: 1996 Brood year Steelhead growth and early life-history transitions


Metadata
File Identifier: gov.noaa.nmfs.inport:17262
Metadata Language: English
: UTF8
Resource Type: Dataset
Responsible Party:
Organisation Name: Alaska Fisheries Science Center
Role: Resource Provider
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Delivery Point: 7600 Sand Point Way N.E., Building 4
City: Seattle
Administrative Area: WA
Postal Code: 98115
Country: USA
Online Resource: http://www.afsc.noaa.gov
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Individual Name: MC, Metadata Coordinators
Organisation Name: Alaska Fisheries Science Center
Role: Point Of Contact
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E-Mail Address: AFSC.metadata@noaa.gov
Online Resource: http://www.afsc.noaa.gov
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Metadata Standard Name: ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
Metadata Standard Version: ISO 19115-2:2009(E)
Data Identification
Abstract: 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.
Purpose: 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.
Language: eng; US
Citation:
Title: AFSC/ABL: 1996 Brood year Steelhead growth and early life-history transitions
Alternate Title: AFSC/ABL: 1996 Brood year Steelhead growth and early life-history transitions
Date:
Date: 2004-12-01
Date Type: Publication Date
Identifier:
Individual Name: Gray, Andrew
Organisation Name: Alaska Fisheries Science Center
Role: Originator
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E-Mail Address: andrew.gray@noaa.gov
Online Resource: http://www.afsc.noaa.gov
Point Of Contact:
Individual Name: Gray, Andrew
Organisation Name: Alaska Fisheries Science Center
Role: Point Of Contact
Contact Info:
Voice:
Fax:
Delivery Point:
City:
Administrative Area:
Postal Code:
Country:
E-Mail Address: andrew.gray@noaa.gov
Online Resource: http://www.afsc.noaa.gov
Individual Name: Gray, Andrew
Organisation Name: Alaska Fisheries Science Center
Role: Custodian
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E-Mail Address: andrew.gray@noaa.gov
Online Resource: http://www.afsc.noaa.gov
Topic Category: Biology and Ecology
Keyword Collection:
Keyword: growth
Keyword: heritability
Keyword: maturation
Keyword: Oncorhynchus mykiss
Keyword: precocious
Keyword: smolting
Keyword: steelhead
Keyword: AK
Keyword: Alaska
Keyword: Little Port Walter
Associated Thesaurus: Geographic Names Information System
Keyword: DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce
Associated Thesaurus: Global Change Master Directory (GCMD) Data Center Keywords
Keyword: Auke Bay Laboratories
Associated Thesaurus: InPort
Spatial Extent:
West Bounding Longitude: -134.6433
East Bounding Longitude: -134.6333
North Bounding Latitude: 56.39417
South Bounding Latitude: 56.38417
Constraints: 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.
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Other Constraints: 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. | 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.
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Classification: unclassified
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Distribution
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URL: https://noaa-fisheries-afsc.data.socrata.com/dataset/AFSC-ABL-1996-Brood-year-Steelhead-growth-and-earl/7ga7-pdb4/data
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Function: Download
Distributor:
Distributor Contact:
Individual Name: Gray, Andrew
Organisation Name: Alaska Fisheries Science Center
Role: Distributor
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E-Mail Address: andrew.gray@noaa.gov
Online Resource: http://www.afsc.noaa.gov
Quality
Scope: Dataset
Lineage: Contact the dataset POC for full methodology