Seabirds transect surveys were conducted in Baltic Sea from 1992 to 1999. Standard seabird offshore sampling techniques assume that line transect of 300 m width is basically used for counting birds sitting on the water surface, whereas the 'snap-shot' method is used for the counting of flying birds at strongly fixed intervals of time.<br><br> Additional efforts were put into studies of the offshore seabird and waterfowl movements. We recorded flying birds along 1,000 m wide transect over the 'classic' 300 m transect used for calculations of seabird densities during 'snap-shots'. The main purpose of our work was to investigate spatial structure and dynamics of the offshore seabird populations and to assess their status in specific conditions of the Baltic Sea marine ecosystem. The main tasks of our work were the following:<br> -Study species composition, abundance and spatial distribution of seabird populations in different seasons of the year, distinguish dominating species and the most important seabird concentration areas in the eastern Baltic; <br> -Study community structure of inter-specific assemblages and ecological adaptations of wintering seabird populations; <br> -Study the processes of spatial dynamics and trends of spatial structure in regional seabird populations within the gradient of winter climatic conditions; and <br> -Study offshore migratory routes and temporary concentration areas of seabirds in the Baltic Proper. [2015-03-24] There were 199 records with a value of "EMPTY" or "empty" in the species column. These records are removed. Zydelis, R2006https://doi.org/10.82144/5d077d0dOBIS-SEAMAP358http://seamap.env.duke.edu/dataset/358OBIS-SEAMAPVersion 1.5.0 ground condition 19921018 19990308 Complete None planned 17.6853324.3636758.8833354.8318317.6853324.3636758.8833354.83183Baltic Sea NoneVesselsSightingsSeabirdstransect surveysdensitydistributionNoneBaltic Sea 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 Zydelis, R. 2006. Baltic Seabirds Transect Surveys. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/358) 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 Ramunas Zydelis Duke University mailing and physical address

135 Duke Marine Lab Rd

Beaufort NC 28516 USA 252.504.7691 zydelis@duke.edu Gediminas Vaitkus, Institute of Ecology of Vilnius University Integrated Taxonomic Information Systemhttp://www.itis.usda.gov/Downloaded April, 2004Refer to the contact information of the datasetKingdomAnimalia202423PhylumChordata158852SubphylumVertebrata331030ClassAves174371OrderCiconiiformes174770FamilyAlcidae176967GenusAlca176970SpeciesAlca torda176971GenusAlle176981SpeciesAlle alle176982GenusCepphus176984SpeciesCepphus grylle176985GenusUria176973SpeciesUria aalge176974FamilyLaridae176802SubfamilySterninae553483GenusChlidonias176957SpeciesChlidonias niger176959GenusSterna176885SpeciesSterna albifrons176899SpeciesSterna hirundo176888SpeciesSterna paradisaea176890SubfamilyLarinae553473GenusLarus176803SpeciesLarus argentatus176824SpeciesLarus canus176832SpeciesLarus fuscus176821SpeciesLarus hyperboreus176808SpeciesLarus marinus176815SpeciesLarus minutus176840SpeciesLarus ridibundus176835GenusRissa176806SpeciesRissa tridactyla176875FamilyPhalacrocoracidae174713GenusPhalacrocorax174714SpeciesPhalacrocorax carbo174715FamilyStercorariidae176790GenusStercorarius176791SpeciesStercorarius parasiticus176793SpeciesStercorarius pomarinus176792 Vaitkus, G.2001Acta Zoologica Lituanica11 (3): 273-279http://www.ekoi.lt/uploads/docs/VaitkusAZL%2011_273-279.pdfRelational 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. Hyrenbach2009Oceanography22(2):104-115http://www.tos.org/oceanography/article/obis-seamap-the-world-data-center-for-marine-mammal-sea-bird-and-sea-turtle Ei FujiokaDuke Universitymailing and physical address

LSRC A328

DurhamNCUSA27708efujioka@duke.edu919-613-8021 http://www.nbii.gov/ Biological Data Profile 2015032420150324 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.20060714 OBIS-SEAMAPNicholas School of Environment, Duke Univ.mailing and physical address

A328, LSRC

DurhamNC27708USA919-613-8021seamap-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.FreeGo to the OBIS-SEAMAP web sitezipzipped shapefilehttp://seamap.env.duke.edu/dataset/358OBIS-SEAMAP Dataset ID 358GCS_WGS_1984Decimal degrees1e-051e-05D_WGS_1984WGS_19846378137.000000298.257224Institute of Ecology of Vilnius UniversityBiogeographic dataBiogeographic dataNot applicabletransectTransect codeData providerTransect codeData providerdateDate of observationData provider1992-10-181999-03-08timeTime of observationData provider10:00:00 AM9:59:00 AMtypeTransect type (1, 2, 3)Data providerTransect type (1, 2, 3)Data providervesselShip nameData providerShip nameo1Observer name first letters (left)Data providerObserver name first letters (left)o2Observer name first letters (right)Data providerObserver name first letters (right)statusdefinition not providedData providerdefinition not providedlatLatitude of observationData provider54.831830058.8833300lonLongitude of observationData provider17.685330024.3636700knotsShip speed (knots)Data provider2.70016.500courseShip course (degrees)Data provider0.600334.000speciesSpecies observedData providerSpecies observedtsnTaxonomic Serial Number by ITISData providerTaxonomic Serial Number by ITISData providerscientificScientific nameData providerScientific namecommonCommon nameData providerCommon namerankTaxonomic rankData providerTaxonomic ranknumberNumber of animals observedData providerNumber of animals observeddistanceBand of the transect (1, 2, 3 – inside, 4 - outside)Data providerBand of the transect (1, 2, 3 – inside, 4 - outside)Data providerpattern1 – fly, 2 – sit on the water, 3 – follow the shipData provider1 – fly, 2 – sit on the water, 3 – follow the shipData providerageAge category of the bird (code)Data providerAge category of the bird (code)Data providerplumagePlumage (0, 1, 2, 3)Data providerPlumage (0, 1, 2, 3)Data providerdirectionFlight direction – degrees estimated as if the ship is heading to the North (360 degrees)Data providerFlight direction – degrees estimated as if the ship is heading to the North (360 degrees)fd_realReal flight direction (corrected according to shipData providerReal flight direction (corrected according to shipmoultMoulting status (0, 1, 2)Data providerMoulting status (0, 1, 2)Data providerremarksRemarksData providerRemarksgeomGeometry 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)