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    • AFSC/RACE/SAP/Foy: The effects of ocean acidification on ovigerous Tanner crab size, calcium, and magnesium content. : Kodiak Island, Alaska.

    Metadata Updated: June 1, 2025

    To study the effects of ocean acidification we conducted laboratory experiments with adult ovigerous females of the economically important southern Tanner crab, Chionoecetes bairdi. Ovigerous females were reared in one of 3 treatments: control (ambient pH ~8.1), pH 7.8, and pH 7.5 for 2 years. The adult female sizes used for the experiments ranged from 87 to 112 mm among the three treatments. Throughout the experiment , pH and temperature were measured daily in each of the 3 treatments. The mean daily temperature was 5.0 C, varied seasonally from a low of ~1 C in January 2012 to a high of ~ 9C in August 2011, and did not vary between treatments. pH remained significantly different among the treatments. Brooding duration for each female was defined as beginning the day of egg extrusion in 2012 and ended when larval hatching began in 2013. Mean brood duration ranged from 340 to 366 days. Magnesium and calcium content were determined at the end of the experiment from a portion of exoskeleton. Magnesium did not differ with pH treatment but the ratio of magnesium to calcium did differ among treatments.

    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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    Dates

    Metadata Date May 15, 2025
    Metadata Created Date October 28, 2022
    Metadata Updated Date June 1, 2025
    Reference Date(s) (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NMFS AFSC

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date May 15, 2025
    Metadata Created Date October 28, 2022
    Metadata Updated Date June 1, 2025
    Reference Date(s) (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:27842
    Access Constraints Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/RACE/SAP/Foy: The effects of ocean acidification on ovigerous Tanner crab size, calcium, and magnesium content. : Kodiak Island, Alaska. [Data Date Range], https://www.fisheries.noaa.gov/inport/item/27842., Access Constraints: none, Use Constraints: Must read and fully comprehend the metadata prior to data use; acknowledgement of the Originator when using the data set as a source; sharing of data products developed using the source data set with the Originator; data should not be used beyond the limits of the source scale; the data set is NOT a survey document and should not be utilized as such
    Bbox East Long -151.1
    Bbox North Lat 57.72
    Bbox South Lat 57.65
    Bbox West Long -152.3
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 77c8883e-5268-4719-b155-bb4586db037f
    Harvest Source Id 26a29bb9-50b0-47fd-920b-edc74aa6ec76
    Harvest Source Title NMFS AFSC
    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
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-152.3, 57.65], [-151.1, 57.65], [-151.1, 57.72], [-152.3, 57.72], [-152.3, 57.65]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2011-05-10
    Temporal Extent End 2013-07-16

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