https://doi.org/10.82144/8b183605 https://seamap.env.duke.edu/dataset/334 https://www.gbif.org/dataset/2b7ba688-b90c-49b3-b3db-20d781389927 https://obis.org/dataset/0c02d1bc-07fa-4f16-838f-50755a61e703 Pere Abelló Pere Abelló Primary contact unknown@dummy.com José Manuel Arcos José Manuel Arcos Primary contact unknown@dummy.com David Hyrenbach Duke University Marine Laboratory Primary contact khyrenba@u.washington.edu http://www.nicholas.duke.edu/people/faculty/hyrenbach.html Maite Louzao IMEDEA (CSIC-UIB) Primary contact m.louzao@uib.es Daniel Oro IMEDEA (CSIC-UIB) Primary contact d.oro@uib.es OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu distributor Pere Abelló Pere Abelló Primary contact unknown@dummy.com owner José Manuel Arcos José Manuel Arcos Primary contact unknown@dummy.com owner David Hyrenbach Duke University Marine Laboratory Primary contact khyrenba@u.washington.edu http://www.nicholas.duke.edu/people/faculty/hyrenbach.html owner Maite Louzao IMEDEA (CSIC-UIB) Primary contact m.louzao@uib.es owner Daniel Oro IMEDEA (CSIC-UIB) Primary contact d.oro@uib.es owner 2025-07-31 eng Original provider: Mediterranean Institute for Advanced Studies (IMEDEA) Dataset credits: Institut de Ciències del Mar, CMIMA (CSIC), Barcelona, Spain Abstract: Replicate springtime (May - June) vessel-based surveys in the western Mediterranean during standardized trawl surveys of the Spanish continental shelf and slope over three years (1999, 2000, 2002), provide broad-scale information on seabird distributions from the Strait of Gibraltar to Cape Creus.<br><br> All observations were made by the same observer (Jose Maria Arcos) during 1999, 2000, and 2002 using standardized strip-transect techniques (Tasker et al. 1984) with specific adaptations to the study area. A 300 m strip-width transect band was used, counting at both sides of the vessel (i.e., surveying a 600 m band) when the conditions (light and wind) were appropriate. Snap-shot counts for flying birds were used. All birds observed during the surveys were recorded and aggregated into 10-minute bins. Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml Observation GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml Marine Biology Visual sighting Vessels Sightings seabirds Western Mediterranean N/A The original dataset includes 17 species names (columns) whose values represented animal counts for each 10-minute survey bin. In the OBIS-SEAMAP dataset, these columns are transposed to rows, each of which is a record for a single species. Due to recent changes in the taxonomy of Mediterranean seabirds, the species <i>Puffinus yelkouan</i> can include either <i>Puffinus yelkouan</i> or <i>Puffinus mauretanicus</i> because the latter has not been assigned an ITIS number. Even though both species are identified by the same code, they can be told apart using the field 'sp_obs.' <i>Puffinus mauretanicus</i> is coded as 'PM' and <i>Puffinus yelkouan</i> as 'PY.' The original dataset also includes ancillary data on the survey effort (length, survey strip width, area surveyed for each 10-minute bin, and vessel speed) and environmental conditions during surveys (Beaufort sea state, presence/absence of rain, and the proportion of cloud cover in the sky). Reference: Tasker, M.L., P.H. Jones, T. Dixon, and B.F. Blake. 1984. Counting seabirds at sea from ships: A review of methods employed and a suggestion for a standardized approach. Auk 101:567-577. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License. https://seamap.env.duke.edu/dataset/334 Oceans,Alboran Sea,Strait of Gibraltar,Cape Creus,Balearic Islands -5.203 3.5933 42.4096 35.9313 1999-05-05 2002-06-13 Scientific names are based on the Integrated Taxonomic Information System (ITIS). species Calonectris diomedea Cory's shearwater species Chlidonias leucopterus White-winged tern species Chlidonias niger Black tern species Fratercula arctica Atlantic puffin species Hydrobates pelagicus European storm petrel species Ichthyaetus audouinii Audouin's gull species Ichthyaetus melanocephalus Mediterranean gull species Larus cachinnans Yellow-legged gull species Larus fuscus Lesser black-backed gull species Morus bassanus Northern gannet species Phalacrocorax aristotelis European Shag species Puffinus yelkouan Yelkouan shearwater species Stercorarius skua Great skua species Sterna hirundo Common tern species Sternula albifrons Little tern species Thalasseus sandvicensis Sandwich tern To study the distribution and oceanographic habitat of seabirds in the Western Mediterranean during the spring (May - June) of multiple years. Surveys were conducted onboard B/O Cornide de Saavedra research vessel, as part of the annual <a href=http://www.izor.hr/eng/international/medits.html>MEDITS</a> trawl surveys, extending along the Mediterranean coast of the Iberian Peninsula, from the Strait of Gibraltar in the southwest to Cape Creus in the northeast.<br><br> Maite Louzao processed the at-sea data, as part of her Ph.D. dissertation, in the laboratory of Dr. Daniel Oro, at the Mediterranean Institute for Advanced Studies (IMEDEA), in Mallorca, Spain. notPlanned Pere Abelló Pere Abelló Primary contact unknown@dummy.com José Manuel Arcos José Manuel Arcos Primary contact unknown@dummy.com David Hyrenbach Duke University Marine Laboratory Primary contact khyrenba@u.washington.edu http://www.nicholas.duke.edu/people/faculty/hyrenbach.html Maite Louzao IMEDEA (CSIC-UIB) Primary contact m.louzao@uib.es Daniel Oro IMEDEA (CSIC-UIB) Primary contact d.oro@uib.es NA NA NA Pere Abelló owner José Manuel Arcos owner David Hyrenbach owner Maite Louzao owner Daniel Oro owner NA zd_334 2025-07-31T14:13:44-04:00 dataset Hyrenbach, D., J. Arcos, M. Louzao, D. Oro and P. Abelló. 2020. Mediterranean seabird surveys 99/00/02. Version 1.5.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/8b183605. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/334 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/334/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/334/eml OBIS-SEAMAP zd_334 zd_334