{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T16:56:19Z","timestamp":1789750579304,"version":"4.0.1"},"reference-count":58,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2023,8,29]],"date-time":"2023-08-29T00:00:00Z","timestamp":1693267200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100016404","name":"Galapagos Conservation Trust","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100016404","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Fish Biology"],"published-print":{"date-parts":[[2023,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Tropical pelagic predators are exploited by fisheries and their movements are influenced by factors including prey availability, temperature, and dissolved oxygen levels. As the biophysical parameters vary greatly within the range of circumtropical species, local studies are needed to define those species' habitat preference and model possible behavioral responses under different climate change scenarios. Here, we tagged yellowfin tuna <jats:italic>Thunnus albacares<\/jats:italic> in the Gal\u00e1pagos Marine Reserve and tracked the horizontal and vertical movements of eight individuals for 4\u201397\u2009days. The tuna traveled a mean of 13.6\u2009km\u2009day<jats:sup>\u22121<\/jats:sup> horizontally and dispersed throughout the archipelago and in offshore waters inside the Gal\u00e1pagos Marine Reserve and in the surrounding Ecuadorian exclusive economic zone. Vertically, they traveled a mean of 2\u2009km\u2009day<jats:sup>\u22121<\/jats:sup>, although high\u2010resolution data from a recovered tag suggested that transmitted data underestimated their vertical movement by a factor of 5.5. The tracked yellowfin tuna spent most of their time near the surface, with an overall mean swimming depth of 24.3\u2009\u00b1\u200946.6\u2009m, and stayed shallower at night (11.1\u2009\u00b1\u200916.3\u2009m) than during the day (\u200937.7 \u00b1\u200960.9\u2009m), but on occasion dived to cold, oxygen\u2010poor waters below 200\u2009m. Deep dives were commonly made during the day with a mean recovery period of 51\u2009min between exposures to modeled oxygen\u2010limiting conditions &lt;1.5\u2009mL\u2009L<jats:sup>\u22121<\/jats:sup>, presumably to re\u2010oxygenate. The depth and frequency of dives were likely limited by dissolved oxygen levels, as oxygen\u2010depleted conditions reach shallow depths in this region. The main habitat of tracked yellowfin tunas was in the shallow mixed layer, which may leave them vulnerable to fishing. Vertical expansion of low\u2010oxygen waters under future climate change scenarios may further compress their habitat, increasing their vulnerability to surface fishing gear.<\/jats:p>","DOI":"10.1111\/jfb.15525","type":"journal-article","created":{"date-parts":[[2023,8,16]],"date-time":"2023-08-16T16:11:21Z","timestamp":1692202281000},"page":"1264-1276","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Movement and vertical habitat use of yellowfin tuna <scp><i>Thunnus albacares<\/i><\/scp> in a vertically compressed habitat: the Gal\u00e1pagos Marine Reserve"],"prefix":"10.1111","volume":"103","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8760-8972","authenticated-orcid":false,"given":"Christoph A.","family":"Rohner","sequence":"first","affiliation":[{"name":"Marine Megafauna Foundation  West Palm Beach Florida USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6071-605X","authenticated-orcid":false,"given":"Alberto C.","family":"Naveira Garabato","sequence":"additional","affiliation":[{"name":"Ocean and Earth Science University of Southampton  Southampton UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4986-098X","authenticated-orcid":false,"given":"Alex R.","family":"Hearn","sequence":"additional","affiliation":[{"name":"Gal\u00e1pagos Science Center, Department of Biological Sciences Universidad San Francisco de Quito  Quito Ecuador"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,8,29]]},"reference":[{"key":"e_1_2_7_2_1","unstructured":"Acuerdo Ministerial MAATE\u20102022\u2010039. (2022).Actual\u00edcese los l\u00edmites de la Reserva Marina de Gal\u00e1pagos ubicada en la jurisdicci\u00f3n de la provincia de Gal\u00e1pagos cantones Santa Cruz San Crist\u00f3bal e Isabela parrioquias Bellavista. Registro Oficial 59 2\u201312."},{"key":"e_1_2_7_3_1","unstructured":"Aires\u2010da\u2010Silva A. Maunder M. N. Xu H. Minte\u2010Vera C. Valero J. L. &Lennert\u2010Cody C. E.(2020).Risk analysis for management of the tropical tuna fishery in the eastern Pacific Ocean. 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