{999A9551-D701-4CF5-9373-131D3DD8D969} 20050512 19291400 FALSE 20060710 17161900 20060815 12091700 PlatformRadio transmittersAnimal movementsUser defined Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.1.0.722 en Previous tagging studies of the movements of green turtles (<i>Chelonia mydas</i>) nesting at Ascension Island have shown that they shuttle between this remote target in the Atlantic Ocean and their feeding grounds on the Brazilian coast, a distance of 2300 km or more. Since knowledge of sea turtle migration routes might allow inferences on the still unknown navigational mechanisms of marine animals, we tracked the postnesting migration of six green turtle females from Ascension Island to Brazil. Five of them reached the proximity of the easternmost stretch of the Brazilian coast, covering 1777-2342 km in 33-47 days. Their courses were impressively similar for the first 1000 km, with three turtles tracked over different dates following indistinguishable paths for the first 300 km. Only the sixth turtle made some relatively short trips in different directions around Ascension. The tracks show that turtles (i) are able to maintain straight courses over long distances in the open sea; (ii) may perform exploratory movements in different directions; (iii) appropriately correct their course during the journey according to external information; and (iv) initially keep the same direction as the west-south-westerly flowing current, possibly guided by chemical cues.Luschi et al. (1998) reconstructed the routes followed by turtles leaving the island for their postnesting migration, to evaluate their navigational performance. This would then allow a re-examination of the hypotheses so far proposed about the navigational system used by these turtles to pinpoint Ascension, assuming that the same mechanisms guide the postnesting migration as well. Results show that Ascension turtles use information picked up en route to adjust their migratory course, and suggest that current-borne cues, probably of a chemical nature, may be involved in this process for at least part of the journey. <br><br> Papi et al. (2000) reports the results of an experiment aimed to test the geomagnetic hypothesis by applying a magnetic disturbance to Ascension turtles returning to Brazil. If this disturbance were to impair the orientation of the turtles, this interesting hypothesis would receive its first experimental support. However, the results obtained show that magnetic cues are not essential for oceanic navigation by adult turtles migrating to Brazil. vector digital data http://seamap.env.duke.edu/dataset/994 OBIS-SEAMAP Paolo Luschi, University of Pisa, Italy; Graeme Hays, Swansea University, UK; and Susanne Akesson, und University, Sweden2013-08-23 13:14:37seamap994https://doi.org/10.82144/a0cb5ba6Version 1.0.0OBIS-SEAMAP ground condition1997-04-271998-08-20 CompleteNone planned -38.165-12.45-5.161-12.763-38.165-12.45-12.763-5.161 Open public unless otherwise noted. 1. Not to use data contained in OBIS-SEAMAP in any publication, product, or commercial application without prior written consent of the original data provider. 2. To cite both the data provider and OBIS-SEAMAP appropriately after approval of use is obtained. 3. Not 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. Shapefile Paolo LuschiUniversity of Pisa mailing and physical address

Department of Biology Via Volta 6

PisaI-56126Italy 0502211376pluschi@biologia.unipi.it0502211360 Paolo Luschi, University of Pisa, Italy; Graeme Hays, Swansea University, UK; and Susanne Akesson, und University, SwedenLuschi, P., G.C. Hays, C. Del Seppia, R. Marsh and F. Papi1998http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1689527/Proceedings of the Royal Society: Biological Sciences265: 2279-2284Papi, F., P. Luschi, S. Akesson, S. Capogrossi and G.C. Hays2000http://jeb.biologists.org/content/203/22/3435.abstractJournal of Experimental Biology203: 3435-3443Integrated Taxonomic Information Systemhttp://www.itis.usda.gov/Downloaded April, 2004Refer to the contact information of the dataset en FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time Ei Fujioka Nicholas School of Environment, Duke University mailing and physical addressDurhamNC27708

A328, LSRC

USA 919-613-8021 seamap-contact@duke.edu Connie KotDuke University http://www.nbii.gov/Biological Data Profilehttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile 2013-07-31 2013-08-29 ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset Downloadable Data 0.021 0.021 OBIS-SEAMAP Free Go to the OBIS-SEAMAP web site and click on [Datasets] tab appearing on upper left. Nicholas School of Environment, Duke Univ. OBIS-SEAMAP mailing and physical address DurhamNCUSA

A328, LSRC

27708 919-613-8021 seamap-contact@duke.edu Not 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. 002 Local Area Network 0.021 Shapefile Vector GCS_WGS_1984Decimal degrees0.0001670.000167D_WGS_1984WGS_19846378137.000000298.257224GCS_WGS_1984 This section explains attributes included in the original dataset. OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only. Should you need other attributes described here, you are encouraged to contact the data provider.Paolo Luschi, University of Pisa, Italy; Graeme Hays, Swansea University, UK; and Susanne Akesson, und University, SwedenoidUnique ID (created by OBIS-SEAMAP)recidRecord IDtag_idTag IDfixnoobs_countNumber of animalssp_obsSpecies observedsp_tsnSpecies ITIS TSNyearYear of observationdatetime1Original date and timeobs_dateDate of observationobs_timeTime of observationlcLocation classlatitudeLatitude of observationlongitudeLongitude of observationsexSex of animalage_classAge class of animal (adult or juvenile)countryCountry where sea turtle was taggedbeachNesting beach where sea turtle was taggednotesNotescite1Citation 1cite2Citation 220060815