{8A802939-B7D9-407C-AD44-9A23F4820209}2008121217023000FALSE20081212170230002008121217023000Relational databaseenResearchers from NMML's Cetacean Assessment and Ecology Program conducted the line transect aerial surveys for harbor porpoise and Dall's porpoise from 27 May to 28 July 1998 in the Gulf of Alaska (offshore waters from Cape Suckling to Unimak Pass), Prince William Sound, and Shelikof Strait. Surveys were conducted from a NOAA Corps DeHavilland Twin Otter, flown at an altitude of 152.5 m (500 ft) and an airspeed of 185 km/hr (100 knots). Sawtooth lines were designed to cover the offshore waters from Cape Suckling to Unimak Pass (offshore of Kodiak Island) and included lines extending 15 nmi seaward, or to the 50 fathom line, whichever was farthest from shore and lines extending to the 1,000 fathom line. In Shelikof Strait a series of zigzag lines were designed between the Alaska Peninsula and Kodiak Island. Larger inlets and bays were also included in the survey. The survey in Prince William Sound consisted of two lines: one covering the central waters and one along the coast with extensions into selected inlets. Two primary observers surveyed from a bubble window on the left and right sides of the plane. An independent observer was positioned in a belly window. This observer surveyed the trackline directly below the plane to record animals missed on the trackline by the primary observers.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.
Inclement weather restricted the completion of the entire planned survey. Survey lines were completed in Prince William Sound and an adequate number of survey miles were completed offshore from Cape Suckling west along the Kenai Peninsula, offshore of Kodiak Island, west to Sutwik Island (Alaska Peninsula), and in Shelikof Strait. A total of 49.09 survey hours were flown, with sightings of 69 harbor porpoise, 60 Dall's porpoise, 13 killer whales, 46 humpback whales, 25 fin whales, 1 Cuvier's beaked whale, 11 unidentified dolphins/porpoises, 31 unidentified whales, 21 harbor seals, 18 Steller sea lions, and 8 unidentified pinnipeds. These numbers do not include the independent bubble window observer sightings.Hobbs, R2004NMML Small Cetacean Aerial Survey 1998https://doi.org/10.82144/a3414b24OBIS-SEAMAP116http://seamap.env.duke.edu/dataset/116OBIS-SEAMAPVersion 1.0.0ground conditionREQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.1998053119980727None planned-157.412-144.289260.839356.2292-157.412-144.289256.229260.8393OceanNoneAircraftSightingsOpen 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 1998. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/116) 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.ShapefileRoderick HobbsNational Marine Mammal Laboratorymailing and physical address7600 Sand Point Way NESeattleWA98115-6349USA206-526-6278Rod.Hobbs@noaa.govNational Marine Mammal LaboratoryHalpin, 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. Hyrenbach2009OBIS-SEAMAP: The world data center for marine mammal, sea bird, and sea turtle distributionsvector digital dataOceanography22(2):104-115http://www.tos.org/oceanography/article/obis-seamap-the-world-data-center-for-marine-mammal-sea-bird-and-sea-turtleMicrosoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500seamap116-157.412-144.289260.839356.22921-157.412-144.289260.839356.22921enFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timehttp://www.nbii.gov/Biological Data ProfileREQUIRED: The person responsible for the metadata information.REQUIRED: The organization responsible for the metadata information.mailing and physical addressDurhamNC27708A328 LSRCUSA919-613-8021Ei FujiokaDuke Universityefujioka@duke.edu2015120420151204ISO 19115 Geographic Information - MetadataDIS_ESRI1.0datasetOBIS-SEAMAP Dataset ID 1160.0080.008OBIS-SEAMAPNicholas School of Environment, Duke Univ.mailing and physical addressA328 LSRCDurhamNC27708USA919-613-8021seamap-contact@duke.eduNot to hold OBIS-SEAMAP 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.
Also please refer to Use Constraints.002file://\\GLACIER\C$\Documents and Settings\efujioka\My Documents\OBIS-SEAMAP\GIS\OBIS_SHAPE\seamap116.shpLocal Area Network0.008ShapefileVectorSimplePointFALSE305FALSEFALSEEntity point305GCS_WGS_1984Decimal degrees0.00010.0001D_WGS_1984WGS_19846378137.000000298.257224GCS_WGS_1984305Biogeographic dataBiogeographic dataNot applicabledateDateData providerDatetimeTimeData providerTimelatitudeLatitude 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 Laboratory20081212All 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