gov.noaa.nmfs.inport:27853 eng UTF8 dataset 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 Foy, Robert robert.foy@noaa.gov email pointOfContact 2026-03-04T19:17:17 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) AFSC/RACE/SAP/Foy: Effects of ocean acidification on larval Tanner crab: Kodiak Island, Alaska. AFSC/RACE/SAP/Foy: Effects of ocean acidification on larval Tanner crab: Kodiak Island, Alaska. publication NOAA/NMFS/EDM 27853 https://www.fisheries.noaa.gov/inport/item/27853 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information Foy, Robert robert.foy@noaa.gov originator Long, Chris chris.long@noaa.gov originator Swiney, Katherine katherine.swiney@noaa.gov originator Kodiak Fisheries Research Center 907 481-1700 301 Research Court Kodiak AK 99615 USA https://www.afsc.noaa.gov/kodiak/ WWW:LINK-1.0-http--link Kodiak Fisheries Research Center Website Website listed for Kodiak Fisheries Research Center information originator tableDigital To study the effects of ocean acidification we examined the effects of ocean acidification on the larval stages 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. Larvae in year 1 were from oocytes developed in the field whereas larvae in year 2 were from oocytes developed under acidified conditions. Larvae hatched each year, were also exposed to 3 pH treatments to examine starvation-survival, morphology, condition, and calcium/magnesium content. Approximately 300 larvae were stocked in multiple treatments for testing the effect of pH. Hatching success was measured as the total % of larval hatched from a full clutch while duration was the number of days over which hatching occurred. Hatching success did not differ among treatments in 2012 but varied between 46 to 87% in 2013 dependent on pH treatment. Larval mass was highest in pH 7.8 in 2012 and lowest in the control, however in 2013 the highest larval mass was in the control water. There were only small (not significant) changes in magnesium or calcium content among treatments in 2012 however, the reduction in both minerals at higher pH was greater in 2013. There was higher percent carbon and nitrogen contents in pH 7.5 larvae in 2013. The morphology of Tanner crab larval was assessed from 200 larvae stocked in multiple 2 L beakers. There was no effect of treatment on larval morphometrics. In 2012 and 2013, we examined if embryos developed under acidified conditions affected larval morphology by assessing 15 newly hatched larvae from each treatment. There was again no effect of treatment on larval morphometrics. Starvation survival experiments were performed in 1 L sized PVC inserts. In both years larvae from embryos that developed in pH 7.5 water survived about 3 days longer than those that developed in control water. However, in 2012 larvae from embryos that had developed in pH 7.8 water were similar to control larvae whereas in 2013 they were intermediate between the control and pH 7.5 larvae. The overall effects of treatment at the larval stage appeared to be better condition and initial survival at lower pH, however multiple years of treatment led to lower survival. The purpose of the larval studies was to test the effects of lower pH on larval hatching success, condition, and survival. completed Foy, Robert robert.foy@noaa.gov pointOfContact Foy, Robert robert.foy@noaa.gov email custodian notPlanned Kodiak Island place Alaska Hatching Duration Hatching Success Larval Ca nad Mg Larval Mg Larval morphology Tanner crab larval Ca ocean acidification survival 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 Shellfish Assessment Program project InPort otherRestrictions Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/RACE/SAP/Foy: Effects of ocean acidification on larval Tanner crab: Kodiak Island, Alaska. [Data Date Range], https://www.fisheries.noaa.gov/inport/item/27853. 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: none otherRestrictions 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 unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 27853 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/27853.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 oceans MS Excel 2012 -152.3 -151.1 57.65 57.72 Kodiak Island, Alaska | Currentness: Observation 2011-06-21 2013-07-03 false eng false Hatching success and duration.xlsx 2016-05-16 publication Larval Ca and Mg.xlsx 2016-05-16 publication Larval CHN.xlsx 2016-05-16 publication Larval mass.xlsx 2016-05-16 publication Larval Morphology.xls 2016-05-16 publication Larval Survival.xlsx 2016-05-16 publication Alaska Fisheries Science Center (206) 526-4000 (206) 526-4004 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA afsc.webmaster@noaa.gov https://www.fisheries.noaa.gov/about/alaska-fisheries-science-center WWW:LINK-1.0-http--link Alaska Fisheries Science Center Website AKFSC Home Page information 0700-1700 Pacific Time email distributor https://console.cloud.google.com/storage/browser/_details/nmfs_odp_afsc/RACE/SAP/Foy%3B%20Effects%20of%20ocean%20acidification%20on%20larval%20Tanner%20crab%3B%20Kodiak%20Island%2C%20Alaska%3B%20Hatching-success-and-duration.csv WWW:LINK-1.0-http--link https://console.cloud.google.com/storage/browser/_details/nmfs_odp_afsc/RACE/SAP/Foy%3B%20Effects%20of%20ocean%20acidification%20on%20larval%20Tanner%20crab%3B%20Kodiak%20Island%2C%20Alaska%3B%20Hatching-success-and-duration.csv Note: Dataset migrated by Dan Woodrich (AFSC data management coordinator) on 12/16/2021. Contact: Daniel.woodrich@noaa.gov download dataset Accuracy The accuracy of the hatching success and duration data is high (100%) due to the type of data (counts) and due to the frequency of observations during the experiment. The accuracy of the larval experimental data is high (less than 1% difference from actual). The instruments used for mass, Ca and Mg had low measurement error. The accuracy of the Larval Morphology data is high due to consistency during morphological measurement from experienced scientists with replicate readings when appropriate. In addition, the frequency of observations was high during the experiment to ensure that the temporal changes were captured. The accuracy of the Larval Survival data is high (100%) due to the type of data (i.e. counts). Completeness Report The larval experimental datasets are complete (i.e. not filtered). Conceptual Consistency Hatching success and duration, larval morphology, and Ca and Mg information were broadly compared to previous studies on Tanner crab mineral content and to similar measurements made on similar crab species and statistically compared to a control (alpha=0.05). Larval mass and survival information was compared broadly to known values and statistically compared to a control (alpha=0.05); replicate response was also considered. For example, for comparing we used the study described in Mathis, Jeremy T., Jessica N. Cross, and Nicholas R. Bates. "Coupling primary production and terrestrial runoff to ocean acidification and carbonate mineral suppression in the eastern Bering Sea." Journal of Geophysical Research: Oceans (19782012) 116.C2 (2011). Measuring of Hatching success, larval mass, Ca and Mg, CHN, and survival data 2013-07-30T00:00:00 Analysis of the results 2014-05-07T00:00:00 Collection of larval Morphology data 1 step 2011-07-21T00:00:00 Collection of larval Morphology data 2 step 2013-05-29T00:00:00 Statistical analysis 2014-04-07T00:00:00