Aerial surveys was conducted in 1997 progressing from east to west, to estimate abundance of the Southeast Alaska (SEA, 9,844 km survey effort), Gulf of Alaska (GOA, 10,127 km survey effort), and Bering Sea (BS, 7849 km survey effort) harbor porpoise stocks. In addition, 1355 km of survey effort during a Cook Inlet beluga survey were analyzed to add to the coverage for the GOA stock. Data from an independent observer concentrating on the trackline was used to estimate perception bias. Significant differences in g(0) and effective strip width (ESW) were found between the survey conducted in 1997 and the 1998 and 1999 surveys, therefore 1997 was treated separately. In both analyses, g(0) was dependent on visibility reported by observers, and in the 1997 data ESW was dependent as well. The 1997 survey included the inland waters of southeastern Alaska and the eastern Gulf of Alaska from Dixon Entrance to Cape Suckling A 3-year survey began in 1997 to complete a new abundance estimate by 1999. This survey will also include an abundance estimate for Dall’s porpoise (Phocoenoides dalli). Once the 3 years of surveys are completed, the data will be used to estimate annual abundance of harbor porpoise and Dall’s porpoise, which is one of the key pieces of information needed to manage marine mammal-fishery interactions, as required under the Marine Mammal Protection Act. Although the previous harbor porpoise surveys (1991- 1993) used a vessel platform for the inside waters of Southeast Alaska (Dahlheim et al. 1992, 1993, 1994), the current survey was conducted entirely from aircraft. en Hobbs, R2004https://doi.org/10.82144/e0b19e8eOBIS-SEAMAP115http://seamap.env.duke.edu/dataset/115OBIS-SEAMAPVersion 1.0.0 ground condition 19970528 19970728 Complete None planned -143.9533 -131.0048 60.133 54.4542 -143.9533 -131.0048 60.133 54.4542 Alaska NoneAircraftSightingsharbor porpoisesurveyaerial surveycetaceanNoneAlaskaEastern AlaskaGulf of AlaskaDixon EntranceCape Suckling Open public unless otherwise noted. See Use Constraints for details. 1. Not to use data obtained from OBIS-SEAMAP in any publication, product, or commercial application without proper attribution to the original data provider(s) and OBIS-SEAMAP unless the datasets are explicitly shown under the CC0 policy. Citations or credits are suggested as attribution. If the data you downloaded come from multiple datasets, a citation or credit to each of the datasets is required. Suggested citation for this dataset: Hobbs, R. 2004. NMML Small Cetacean Aerial Survey 1997. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/115) on yyyy-mm-dd. Suggested citation for OBIS-SEAMAP: Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach. 2009. OBIS-SEAMAP: The world data center for marine mammal, sea bird, and sea turtle distributions. Oceanography 22(2):104-115 2. To forward the citation of any publication / report that made use of the data / tools provided by OBIS-SEAMAP for inclusion in our list of references. 3. Not to hold OBIS-SEAMAP or the original data providers liable for errors in the data. While we have made every effort to ensure the quality of the database, we cannot guarantee the accuracy of these datasets. 4. The burden for determining fitness for use of the downloaded data for any analyses lies entirely with the user. OBIS-SEAMAP or the original data providers do not support outcomes of your analyses that used the data you downloaded from OBIS-SEAMAP. 5. To consider inclusion of the accompanying transect (effort) dataset if available into the methodology of your analyses. 6. Not to redistribute the data you downloaded from OBIS-SEAMAP through any media without contect from OBIS-SEAMAP and the original data providers unless the datasets are explicitly shown under the CC0 policy. Shapefile Roderick Hobbs National Marine Mammal Laboratory mailing and physical address

7600 Sand Point Way NE

Seattle WA 98115-6349 USA 206-526-6278 Rod.Hobbs@noaa.gov National Marine Mammal Laboratory Integrated Taxonomic Information System http://www.itis.usda.gov/ Downloaded April, 2004 Refer to the contact information of the dataset Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea Suborder Mysticeti Family Balaenopteridae Genus Balaenoptera Species Balaenoptera physalus Ballena de aleta fin whale finback whale rorqual commun Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea cétacés cetáceo mammfères marins baleia baleines cetaceans dauphins dolphins golfinho marine mammals marsouins porpoises whales Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea cétacés cetáceo mammfères marins baleia baleines cetaceans dauphins dolphins golfinho marine mammals marsouins porpoises whales Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea Suborder Mysticeti Family Eschrichtiidae Genus Eschrichtius Species Eschrichtius robustus Ballena gris gray whale Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Carnivora Suborder Caniformia Family Otariidae Genus Eumetopias Species Eumetopias jubatus Steller's sea lion northern sea lion steller sea lion steller sealion Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea Suborder Odontoceti Family Delphinidae Genus Lagenorhynchus Species Lagenorhynchus obliquidens Delfín costado blanco Pacific white-sided dolphin Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea Suborder Mysticeti Family Balaenopteridae Genus Megaptera Species Megaptera novaeangliae rorqual à bosse Ballena jorobada humpback whale Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea Suborder Odontoceti Family Ziphiidae Genus Mesoplodon beaked whales Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea Suborder Odontoceti Family Delphinidae Genus Orcinus Species Orcinus orca épaulard Orca común killer whale orca Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Carnivora Suborder Caniformia Family Phocidae Genus Phoca Species Phoca vitulina Foca común harbor seal phoque commun Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea Suborder Odontoceti Family Phocoenidae Genus Phocoena Species Phocoena phocoena common porpoise harbor porpoise marsouin commun Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea Suborder Odontoceti Family Phocoenidae Genus Phocoenoides Species Phocoenoides dalli Dall's porpoise Marsopa de Dall True's porpoise Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea Suborder Odontoceti Family Physeteridae Genus Physeter Species Physeter catodon sperm whale Relational databaseHalpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach2009vector digital dataOceanography22(2):104-115http://www.tos.org/oceanography/article/obis-seamap-the-world-data-center-for-marine-mammal-sea-bird-and-sea-turtle Roderick Hobbs National Marine Mammal Laboratory mailing and physical address

A328 LSRC

Durham NC 27708 USA 919-613-8021 efujioka@duke.edu Ei FujiokaDuke University http://www.nbii.gov/ Biological Data Profile enFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timehttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile2015120420151204 All observation records are included.Permissible values for date and time and coordinates were validated by the data provider and the OBIS-SEAMAP data manager. Species identification by the data provider was matched with Integrated Taxonomic Information System.Data were put through the OBIS-SEAMAP data registration steps.20040610 Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.3.0.800seamap115-143.9533-131.004860.13354.45421-143.9533-131.004860.13354.45421ISO 19115 Geographic Information - MetadataDIS_ESRI1.0datasetOBIS-SEAMAP Dataset ID 1150.3430.343OBIS-SEAMAPNicholas School of Environment, Duke Univ.mailing and physical address

A328 LSRC

DurhamNC27708USA919-613-8021seamap-contact@duke.edu002file://\\BRYCE\C\Fujioka\OBIS-SEAMAP\GIS\OBIS_SHAPE\seamap115.shpLocal Area Network0.343ShapefileVectorSimplePointFALSE602FALSEFALSEEntity point602GCS_WGS_1984Decimal degrees1e-061e-06D_WGS_1984WGS_19846378137.000000298.257224GCS_WGS_1984602Biogeographic dataBiogeographic dataNot applicabledateDateData provider5/28/19977/28/1997timeTimeData provider10:06:0119:58:02latitudeLatitude in decimal degreesData providerLatitude in decimal degreeslongitudeLongitude in decimal degreesData providerLongitude in decimal degreescountThe number of animalsData providerThe number of animalsspeciesSpecies codeData providerSpecies codegeomGeometry field added by OBIS-SEAMAPData providerGeometry field added by OBIS-SEAMAPoidUnique ID number (generated by OBIS-SEAMAP)Data providerUnique ID number (generated by OBIS-SEAMAP)National Marine Mammal Laboratory2006031514031700200603151403170020060315