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Here we assessed and compared nesting beach fidelity of hawksbill turtles (\n                    <jats:styled-content style=\"fixed-case\">\n                      <jats:italic>Eretmochelys imbricata<\/jats:italic>\n                    <\/jats:styled-content>\n                    ) on Fr\u00e9gate Island, Seychelles using data from beach foot patrols (2017\u20132025;\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u2009575 turtles) and satellite telemetry (2023;\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u200910 turtles) and then examined the implications of fidelity strategies for population estimates. We also reviewed published literature on nesting beach use across sea turtle species. Satellite tracking showed that 50% of equipped turtles were study\u2010beach faithful, laying clutches on one beach, and 50% were study\u2010beach unfaithful, nesting across 2\u20134 beaches on Fr\u00e9gate and on nearby islands. Consequently, clutch frequency estimated through tracking was 1.9 times higher than foot patrol estimates. Estimates of adult female abundance increased as the assumed proportion of clutches laid on other beaches increased, independent of clutch frequency. Across 51 studies at 43 sites around the world, study\u2010beach unfaithful individuals were more likely to be recorded nesting at mainland beaches (21.4% compared with 9.3% on island beaches), with mainland surveys covering greater distances (1.6\u20131000\u2009km) than island surveys (1\u201315.9\u2009km). Maximum inter\u2010nest distances varied across species: green turtles (\n                    <jats:styled-content style=\"fixed-case\">\n                      <jats:italic>Chelonia mydas<\/jats:italic>\n                    <\/jats:styled-content>\n                    ; 2250\u2009km), leatherbacks (\n                    <jats:styled-content style=\"fixed-case\">\n                      <jats:italic>Dermochelys coriacea<\/jats:italic>\n                    <\/jats:styled-content>\n                    ; 1849\u2009km), loggerheads (\n                    <jats:styled-content style=\"fixed-case\">\n                      <jats:italic>Caretta caretta<\/jats:italic>\n                    <\/jats:styled-content>\n                    ; 800\u2009km), olive ridleys (\n                    <jats:styled-content style=\"fixed-case\">\n                      <jats:italic>Lepidochelys olivacea<\/jats:italic>\n                    <\/jats:styled-content>\n                    ; 320\u2009km), and hawksbills (300\u2009km). We demonstrate mixed fidelity strategies within an island hawksbill population, suggesting that fidelity reflects natal philopatry and the proximity of alternative sites. Limited monitoring coverage at remote sites likely contributes to under\u2010detection of nestings by study\u2010beach unfaithful individuals. Individuals using alternative sites signal behavioural plasticity that may contribute to resilience against habitat loss. We recommend characterising beach fidelity through regional data sharing and satellite tracking to inform reliable demographic inference and identify subpopulations vulnerable to climate change.\n                  <\/jats:p>","DOI":"10.1002\/ece3.74341","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T11:23:52Z","timestamp":1791285832000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Sea Turtle Nesting Beach Fidelity Revealed by Satellite Tracking"],"prefix":"10.1002","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7651-5671","authenticated-orcid":false,"given":"Nupur","family":"Kale","sequence":"first","affiliation":[{"name":"Department of Biosciences Swansea University  Wales UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3314-8189","authenticated-orcid":false,"given":"Graeme C.","family":"Hays","sequence":"additional","affiliation":[{"name":"Deakin Marine Research and Innovation Centre, School of Life and Environmental Sciences Deakin University  Geelong Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeanne A.","family":"Mortimer","sequence":"additional","affiliation":[{"name":"Independent Researcher  Victoria, Mah\u00e9 Republic of Seychelles"},{"name":"Department of Biology University of Florida  Gainesville Florida USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anna","family":"Zora","sequence":"additional","affiliation":[{"name":"Fr\u00e9gate Island Foundation, Angelfish Marina  Roche Caiman, Mah\u00e9 Republic of Seychelles"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5144-5008","authenticated-orcid":false,"given":"Kimberley L.","family":"Stokes","sequence":"additional","affiliation":[{"name":"Department of Biosciences Swansea University  Wales UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicole","family":"Esteban","sequence":"additional","affiliation":[{"name":"Department of Biosciences Swansea University  Wales UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,6]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.3354\/esr00281"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1071\/WR20183"},{"key":"e_1_2_11_4_1","first-page":"20","article-title":"An Analysis of Tag Recoveries From Loggerhead Sea Turtles (\n                     Caretta caretta\n                  ) Nesting on Little Cumberland Island, Georgia","volume":"33","author":"Bell R.","year":"1978","journal-title":"Florida Marine Research Publications"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1017\/S002531541200046X"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.2744\/1071\u20108443(2007)6[7:BUIMAM]2.0.CO;2"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/360668a0"},{"key":"e_1_2_11_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/0006\u20103207(83)90049\u20106"},{"key":"e_1_2_11_9_1","first-page":"110","volume-title":"Research and Management Techniques for the Conservation of Sea Turtles","author":"Bolten A. 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