In summer 1992, the south side of the Alaskan Peninsula and the Kodiak Archipelago were surveyed for harbor porpoise (Phocoena phocoena) from the NOAA John N. Cobb using line transect methodology. The shipboard platform was 28.36 m (93 ft) in length with a bridge height of 4.27 m (14 ft). To obtain data on seasonal movements of porpoise, a limited number of transects were made in areas of known porpoise concentrations. When a sighting was made, the following variables were recorded: time, angle, number of reticles to the sighting, radar distance (nm) to the shoreline at the same angle of the sighting, the species, the count of the porpoise seen (best, high, and low), and the animal(s) direction of travel. Search effort was recoded by noting the time and location of the ship at the beginning and end of each transect. Although harbor porpoises, Phocoena phocoena, are known to occur throughout Alaska waters (Fiscus et al. 1976; Leatherwood and Reeves 1978; Lawry et al. 1982; Leatherwood et al. 1983), few estimates of abundance exist. In 1991, the National Marine Mammal Laboratory initiated a 3-yr study on Alaska harbor porpoises. The objectives of this program were to: 1) Obtain minimum population estimates in coastal waters using line transect methodology with a coefficient of variation for density estimates of less than 30% for each survey area. 2) Establish a baseline for detecting changes in abundance through time, for analysis of trends. Note: This dataset and associated effort data was updated on Sept 8, 2005. Those who downloaded them before that date should renew them. The ability of the observers to sight porpoise was sensitive to environmental conditions. As expected, when conditions deteriorated the number of porpoises observed declined. National Marine Mammal Laboratory 2004-08-09 16:59:43.22087-04 seamap150 vector digital data http://nmml.afsc.noaa.gov/ http://seamap.env.duke.edu/datasets/detail_test/150 OBIS-SEAMAP http://seamap.env.duke.edu/ OBIS-SEAMAP ground condition 1992-06-11 08:01:41-04 1992-06-23 19:41:25-04 Complete None planned -136.53583-131.852558.9603355.45167-136.53583-131.852558.9603355.45167 harbor porpoisePhocoena phocoenaabundancemarine mammal surveysurveymarine mammalcetaceanAlaskan PeninsulaKodiak ArchipelagoAlaska Open public unless otherwise noted. Not to use data contained in OBIS-SEAMAP in any publication, product, or commercial application without prior written consent of the original data provider. To cite both the data provider and OBIS-SEAMAP appropriately after approval of use is obtained. Also please refer to Distribution Liability. Shapefile Janice Waite National Marine Mammal laboratory mailing and physical address

7600 Sand Point Way NE

Seattle Washington 98115 USA 206-526-6554 janice.waite@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 s ceo res 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 s ceo res 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 s ceo res 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 s ceo res 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 Odontoceti Family Delphinidae Genus Lagenorhynchus Species Lagenorhynchus obliquidens n 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 bosse Ballena jorobada humpback whale Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Subclass Theria Infraclass Eutheria Order Cetacea Suborder Odontoceti Family Delphinidae Genus Orcinus Species Orcinus orca paulard n killer whale orca 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 M. Dahlheim et al2000Marine Mammal Science16(1):28-45 OBIS-SEAMAP Nicholas School of Environment, Duke Univ. mailing and physical address

A321 LSRC

Durham NC 27708 USA 919-613-8021 dataman@obis.env.duke.edu http://www.nbii.gov/datainfo/metadata/standards/index.html Biological Data Profile OBIS-SEAMAPNicholas School of Environment, Duke Univ.mailing and physical address

A321 LSRC

DurhamNC27708USA919-613-8021dataman@obis.env.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.GCS_WGS_1984Decimal degrees0.0001670.000167D_WGS_1984WGS_19846378137.000000298.257224