Dataset Overview | National Centers for Environmental Information (NCEI)

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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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.

Dataset Citation

Cite as: Dahlheim, Marilyn; Waite, Janice; Clapham, Phillip (2016). 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). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0140931. Accessed [date].

Dataset Identifiers

ISO 19115-2 Metadata

gov.noaa.nodc:0140931

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Download Data	HTTPS (download) Navigate directly to the URL for data access and direct download. FTP (download) 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).
Distribution Formats	Originator data format
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov
Dataset Point of Contact	NOAA National Centers for Environmental Information ncei.info@noaa.gov

Time Period	1991-04-20 to 2012-07-20
Spatial Bounding Box Coordinates	West: -137.06 East: -130.90167 South: 54.6775 North: 59.135
Spatial Coverage Map

General Documentation

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Descriptive Information
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Publication Dates	publication: 2016-02-02 creation: 2016-01-19
Data Presentation Form	Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status	Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility
Data Update Frequency	As needed
Purpose	Assess cetacean distribution, group size, seasonal occurrence, abundance and population trends.
Use Limitations	accessLevel: public Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.

Dataset Citation	Cite as: Dahlheim, Marilyn; Waite, Janice; Clapham, Phillip (2016). 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). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0140931. Accessed [date].
Cited Authors	Dahlheim, Marilyn NOAA National Marine Mammal Laboratory Waite, Janice NOAA National Marine Mammal Laboratory Clapham, Phillip NOAA National Marine Mammal Laboratory
Principal Investigators	Marilyn Dahlheim NOAA Alaska Fisheries Science Center, Marine Mammal Laboratory (NMFS/AFSC/MML)
Contributors	NOAA Alaska Fisheries Science Center, Marine Mammal Laboratory (NMFS/AFSC/MML)
Resource Providers	Janice Waite NOAA Alaska Fisheries Science Center, Marine Mammal Laboratory (NMFS/AFSC/MML) NOAA Alaska Fisheries Science Center, Marine Mammal Laboratory (NMFS/AFSC/MML)
Publishers	NOAA National Centers for Environmental Information

Theme keywords	NODC DATA TYPES THESAURUS 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 NODC OBSERVATION TYPES THESAURUS biological in situ marine mammal observation meteorological survey visual observation WMO_CategoryCode oceanography Global Change Master Directory (GCMD) Science Keywords 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
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS NOAA Alaska Fisheries Science Center, Marine Mammal Laboratory NODC SUBMITTING INSTITUTION NAMES THESAURUS NOAA Alaska Fisheries Science Center, Marine Mammal Laboratory Global Change Master Directory (GCMD) Data Center Keywords DOC/NOAA/NMFS/AFSC/MML > Marine Mammal Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce
Platform keywords	NODC PLATFORM NAMES THESAURUS Medeia NOAA Ship John N. Cobb USS AQUILA Global Change Master Directory (GCMD) Platform Keywords Ships ICES/SeaDataNet Ship Codes 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)
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS binoculars GPS Global Change Master Directory (GCMD) Instrument Keywords BINOCULAR > BINOCULAR GPS RECEIVERS > GPS RECEIVERS
Place keywords	NODC SEA AREA NAMES THESAURUS Coastal Waters of Southeast Alaska and British Columbia Global Change Master Directory (GCMD) Location Keywords OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN
Keywords	NCEI ACCESSION NUMBER 0140931
Keywords	Send2NCEI Submission Package ID 8BE95G

Use Constraints	Cite as: Dahlheim, Marilyn; Waite, Janice; Clapham, Phillip (2016). 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). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0140931. Accessed [date].
Access Constraints	Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees	In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.

Lineage information for: dataset
Processing Steps	2016-02-02T14:20:09Z - NCEI Accession 0140931 v1.1 was published.
Output Datasets	NCEI Accession 0140931 v1.1 NCEI Accession 0140931 v1.1 (download) published 2016-02-02T14:20:09Z

Lineage information for: dataset
Processing Steps	Data Type: DLong (measured); Units: Decimal degrees; Observation Type: in situ; Sampling Instrument: GPS Data Type: Dlat (measured); Units: Decimal Degrees; Observation Type: in situ; Sampling Instrument: GPS

Acquisition Information (collection)
Instrument	binoculars GPS
Platform	Medeia NOAA Ship John N. Cobb USS AQUILA

Last Modified: 2025-12-14T21:05:23Z
For questions about the information on this page, please email: ncei.info@noaa.gov

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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