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Southeast Alaska cetacean vessel surveys conducted by Alaska Fisheries Science Center, National Marine Mammals Laboratory from 1991-04-20 to 2012-07-20 (NCEI Accession 0140931)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 03, 2026 at 02:39 AM | Dataset Last Updated: February 02, 2016 at 12:00 AM
In 1991, NMML initiated cetacean studies with vessel coverage throughout inland waters of Southeast Alaska. Between 1991 and 1993, line-transect methodology was used to: 1) obtain population estimates of both harbor porpoise and Dalls porpoise, 2) establish a baseline for detecting trends in porpoise abundance, and 3) define porpoise distributional patterns and seasonality. Three line-transect surveys were carried out each year spanning spring, summer, and fall. To update abundance and trends for both harbor porpoise and Dalls porpoise, NMML once again initiated line-transect surveys in 2006 (spring and summer), 2007 (spring, summer and fall), 2010 (summer and fall), 2011 (summer and fall), and 2012 (summer) using methods comparable to those used in the early 1990s.

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0140931 ANIMALS - INDIVIDUAL biological data cetacean INDIVIDUAL IDENTITY LATITUDE LONGITUDE MARINE MAMMALS

Complete Metadata
@type dcat:Dataset
accessLevel non-public
contactPoint 
{
  "fn": "NOAA National Centers for Environmental Information",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:ncei.info@noaa.gov"
}
describedByType application/octet-steam
description In 1991, NMML initiated cetacean studies with vessel coverage throughout inland waters of Southeast Alaska. Between 1991 and 1993, line-transect methodology was used to: 1) obtain population estimates of both harbor porpoise and Dalls porpoise, 2) establish a baseline for detecting trends in porpoise abundance, and 3) define porpoise distributional patterns and seasonality. Three line-transect surveys were carried out each year spanning spring, summer, and fall. To update abundance and trends for both harbor porpoise and Dalls porpoise, NMML once again initiated line-transect surveys in 2006 (spring and summer), 2007 (spring, summer and fall), 2010 (summer and fall), 2011 (summer and fall), and 2012 (summer) using methods comparable to those used in the early 1990s.
distribution 
[
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    "@type": "dcat:Distribution",
    "title": "NCEI Dataset Landing Page",
    "accessURL": "https://www.ncei.noaa.gov/archive/accession/0140931",
    "mediaType": "text/html",
    "description": "Navigate directly to the URL for a descriptive web page with download links.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Descriptive Information",
    "accessURL": "https://www.ncei.noaa.gov/archive/accession/oas/140931",
    "mediaType": "text/html",
    "description": "Navigate directly to the URL for a descriptive web page with download links.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
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    "accessURL": "https://www.ncei.noaa.gov/archive/accession/download/140931",
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    "describedByType": "application/octet-stream"
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    "@type": "dcat:Distribution",
    "title": "FTP",
    "accessURL": "ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0085/0140931/",
    "mediaType": "text/html",
    "description": "These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "GCMD Keyword Forum Page",
    "accessURL": "https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords",
    "mediaType": "text/html",
    "description": "Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. 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",
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identifier https://data.noaa.gov/waf/NOAA/NESDIS/ncei/accessions/iso/xml/0140931.xml
issued 2016-01-19T00:00:00.000+00:00
keyword 
[
  "0140931",
  "ANIMALS - INDIVIDUAL",
  "biological data",
  "cetacean",
  "INDIVIDUAL IDENTITY",
  "LATITUDE",
  "LONGITUDE",
  "MARINE MAMMALS",
  "species abundance",
  "SPECIES IDENTIFICATION",
  "SWELL DIRECTION",
  "SWELL HEIGHT",
  "VERTEBRATES",
  "VISIBILITY",
  "WEATHER",
  "WIND DIRECTION",
  "WIND FORCE",
  "WIND SPEED",
  "binoculars",
  "GPS",
  "biological",
  "in situ",
  "marine mammal observation",
  "meteorological",
  "survey",
  "visual observation",
  "Medeia",
  "NOAA Ship John N. Cobb",
  "USS AQUILA",
  "NOAA Alaska Fisheries Science Center, Marine Mammal Laboratory",
  "NOAA Alaska Fisheries Science Center, Marine Mammal Laboratory",
  "Coastal Waters of Southeast Alaska and British Columbia",
  "oceanography",
  "DOC/NOAA/NMFS/AFSC/MML > Marine Mammal Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
  "EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND DIRECTION",
  "EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND SPEED",
  "EARTH SCIENCE > BIOLOGICAL CLASSIFICATION",
  "EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES",
  "EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CETACEANS",
  "EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MARINE MAMMALS",
  "EARTH SCIENCE > OCEANS > OCEAN OPTICS",
  "EARTH SCIENCE > OCEANS > OCEAN WAVES > SWELLS",
  "BINOCULAR > BINOCULAR",
  "GPS RECEIVERS > GPS RECEIVERS",
  "Ships",
  "AQUILA (call sign: NVMZ, ICES code: 3217, 1982-1993)",
  "John N. Cobb (call sign: WMVC, ICES code: 31JC, 1950-2008)",
  "Medeia (call sign: WDE6486, ICES code: 33MQ)",
  "OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN",
  "8BE95G"
]
landingPage https://www.ncei.noaa.gov/contact
language 
[]
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2016-02-02T00:00:00.000+00:00
publisher 
{
  "name": "NOAA National Centers for Environmental Information",
  "@type": "org:Organization"
}
rights otherRestrictions
spatial -130.90167,54.6775,-137.06,59.135
temporal 1991-04-20T00:00:00+00:00/2012-07-20T00:00:00+00:00
theme 
[
  "geospatial"
]
title Southeast Alaska cetacean vessel surveys conducted by Alaska Fisheries Science Center, National Marine Mammals Laboratory from 1991-04-20 to 2012-07-20 (NCEI Accession 0140931)

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