gov.noaa.nmfs.inport:24030 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 2026-03-04T19:17:28 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) AFSC/ABL: NPRB project 1106 Improved aging estimates for spiny dogfish AFSC/ABL: NPRB project 1106 Improved aging estimates for spiny dogfish publication NOAA/NMFS/EDM 24030 https://www.fisheries.noaa.gov/inport/item/24030 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information Tribuzio, Cindy cindy.tribuzio@noaa.gov originator The spiny dogfish (Squalus suckleyi, formerly Squalus acanthias, Ebert et al. 2010) is a small, long-lived and slow-growing shark, which is vulnerable to overfishing. Current methods for aging spiny dogfish are based on reading annuli from dorsal fin spines, which erode and may break. For the past 30 years, scientists have used an exponential relationship between the diameter of the spine and the number of annuli to estimate the number of missing annuli. Coupled with between-reader imprecision (CV = 19%), errors in estimation of worn annuli introduce uncertainty and bias into the aging process, resulting in large confidence intervals and imprecise growth, mortality, and recruitment estimates necessary for stock assessments. Using spines and vertebrae collected from spiny dogfish in the Gulf of Alaska, we aged the spines using conventional methods and vertebrae using the vertebral method. Data presented here includes the sample collection information, raw spine and vertebrae age read data and final annuli counts calculated from the multiple reads. This project was funded by NPRB and was a collaborative work between: AFSC age and growth lab, WA Dept Fish and Wildlife, NWFSC age and growth lab, Dr. Walter Bubley and UAF, and Bechtol Research This dataset contains information gathered while improving aging estimates. NPRB completed Tribuzio, Cindy cindy.tribuzio@noaa.gov pointOfContact Tribuzio, Cindy cindy.tribuzio@noaa.gov custodian asNeeded Alaska Gulf of Alaska Southeast Alaska place Geographic Names Information System age growth 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: NPRB project 1106 Improved aging estimates for spiny dogfish [Data Date Range], https://www.fisheries.noaa.gov/inport/item/24030. 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: There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed. 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. otherRestrictions Distribution Liability: NPRB: No warranty expressed or implied is made regarding the accuracy utility of the data, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with the data. The NPRB shall not be held liable for improper or incorrect use of the data described or contained herein. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 24030 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/24030.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 -168.68 -122.38 47.46 60.25 Gulf of Alaska and Southeast Alaska | Currentness: Ground Condition 2011 2015-01-30 Tribuzio, Cindy cindy.tribuzio@noaa.gov distributor https://console.cloud.google.com/storage/browser/nmfs_odp_afsc/ABL/NPRB%20project%201106%20Improved%20aging%20estimates%20for%20spiny%20dogfish_ID_24030 WWW:LINK-1.0-http--link https://console.cloud.google.com/storage/browser/nmfs_odp_afsc/ABL/NPRB%20project%201106%20Improved%20aging%20estimates%20for%20spiny%20dogfish_ID_24030 Note: Dataset migrated by Dan Woodrich (AFSC data management coordinator) on 12/16/2021. Contact: Daniel.woodrich@noaa.gov download dataset Completeness Report none Conceptual Consistency Contact POC for further information Contact the dataset POC for full methodology