gov.noaa.nmfs.inport:69383 eng UTF8 dataset 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 2026-03-04T19:17:21 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) AFSC/MML: Distribution and abundance of Southeast Alaska harbor porpoise, 2019 2019 creation 2023 publication NOAA/NMFS/EDM 69383 https://www.fisheries.noaa.gov/inport/item/69383 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information 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 originator https://www.frontiersin.org/articles/10.3389/fmars.2022.966489/full WWW:LINK-1.0-http--link Estimating abundance of an elusive cetacean in a complex environment: Harbor porpoises (Phocoena phocoena) in inland waters of Southeast Alaska Publication of abundance estimate from the 2019 harbor porpoise survey download https://repository.library.noaa.gov/view/noaa/46442 WWW:LINK-1.0-http--link Identification of demographically independent populations within the currently designated Southeast Alaska harbor porpoise stock. Publication on Southeast Alaska harbor porpoise demographically independent populations. download tableDigital As currently defined, the Southeast Alaska (SEAK) harbor porpoise (Phocoena phocoena) stock ranges from Dixon entrance to Cape Suckling, including inland waterways. Since the early 1990s, the Marine Mammal Laboratory (MML) has conducted ship and aerial surveys to assess abundance and status of harbor porpoise in this region (Dahlheim et al., 2009; Hobbs and Waite, 2010). In recent years, analysis of ship survey sighting data from inland waters has indicated the potential for substructure within this stock. Trends in abundance between 1991 and 2012 suggested that numbers of harbor porpoise in the northern portion of the study area (Glacier Bay/Icy Strait) were stable. However, in the southern portion of the range (Wrangell and Zarembo), numbers declined significantly in the mid-2000s and subsequently increased again in early 2010 (Dahlheim et al., 2015). The decline was observed only in a region where gillnet fisheries operate. Such contrasting trends in abundance between the northern and southern portions of the range suggest the possible existence of multiple populations within the currently recognized SEAK stock. There is evidence that incidental mortality of harbor porpoise in the salmon driftnet fishery in SEAK may exceed the maximum allowable level under the Marine Mammal Protection Act (MMPA) (Muto et al., 2018). The most recent estimate of abundance for the whole stock is more than 8 years old and cannot be used to estimate PBR. In addition, estimates of abundance from inland waters from 2011 are now outdated and are no longer applicable for management. Therefore, a new estimate was needed to update estimates of the maximum allowable bycatch levels. The purpose of this ship survey was to assess distribution of harbor porpoise in inland waters of SEAK, including areas never previously surveyed by the MML cruises, and to collect visual line transect survey data to compute a new estimate of abundance. completed Angliss, Robyn 206-526-4032 206-526-6615 7600 Sand Point Way, NE Seattle WA 98115-6349 robyn.angliss@noaa.gov pointOfContact Zerbini, Alexandre alex.zerbini@noaa.gov custodian notPlanned Phocoena phocoena theme World Register of Marine Species (WoRMS) CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA place Global Change Master Directory (GCMD) Location Keywords 20.8 Abundance estimate Distance sampling Line transect theme Summer temporal 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 Cetacean Assessment and Ecology Program project InPort otherRestrictions Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/MML: Distribution and abundance of Southeast Alaska harbor porpoise, 2019 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/69383. 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. Applications or inferences derived from the data should be carefully considered for accuracy. Acknowledgement of NOAA/NMFS/AFSC, 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 69383 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/69383.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 oceans -137.16666666667 -131 54.5 59.5 Southeast Alaska | Currentness: Ground Condition 2019-07-19 2019-08-12 false eng false Spreadsheet HP_SEAK_2019 dataset.csv 2023-03-08 publication CSV - Comma Separated Values (Text) NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact WWW:LINK-1.0-http--link NCEI Contact Information Information for contacts at NCEI. information distributor https://www.ncei.noaa.gov/access/metadata/landing-page/bin/iso?id=gov.noaa.nodc:0277244 WWW:LINK-1.0-http--link HP_SEAK_2019 dataset.csv csv files with effort and sighting data. download dataset Completeness Report Survey data was collected with Wincruz (Windows Real Time Sighting-Effort Event Logger developed by Robert Holland at Southwest Fisheries Science Center). Methods are described in publication: https://www.frontiersin.org/articles/10.3389/fmars.2022.966489/full NA