Loggerhead turtle movement off the coast of Taiwan

https://doi.org/10.82144/6b228135 https://seamap.env.duke.edu/dataset/1304 https://www.gbif.org/dataset/4fcbc818-d122-4a4a-ad51-a87fff1686e3 https://obis.org/dataset/269609a8-58e6-4b58-86af-7d3b5cd44e71 Loggerhead turtle movement off the coast of Taiwan Denise Parker NOAA Pacific Islands Fisheries Science Center Primary contact denise.m.parker@outlook.com George Balazs NOAA Pacific Islands Science Center Secondary contact itsahonuworldinhawaii@hotmail.com Jeffrey Polovina NOAA Pacific Islands Fisheries Science Center Secondary contact unknown@dummy.com 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 Denise Parker NOAA Pacific Islands Fisheries Science Center Primary contact denise.m.parker@outlook.com owner George Balazs NOAA Pacific Islands Science Center Secondary contact itsahonuworldinhawaii@hotmail.com originator Jeffrey Polovina NOAA Pacific Islands Fisheries Science Center Secondary contact unknown@dummy.com originator 2025-07-31 eng Original provider: NOAA Pacific Islands Fisheries Science Center (PIFSC) Dataset credits: NOAA Pacific Islands Fisheries Science Center (PIFSC) Abstract: Satellite tags were attached to 34 non-reproductive loggerhead turtles (<i>Caretta caretta</i>) caught as bycatch in the Taiwanese coastal poundnet fishery from 2002 to 2008. Transmission durations ranged from 6 to 503 d (median 172 d), with 5860 d tracked in total. Horizontal track data were processed using the Bayesian state-space modelling to extract the most likely daily positions, taking into account ARGOS data quality and other forms of statistical error. A region of high occupancy in the East China Sea, covering 433 549 km2 of coastal and pelagic area next to Taiwan, China, Japan, and South Korea, was characterized from the tracking data. Various attributes of this hotspot are described using satellite tracks and remotely sensed data. The tracks were merged with oceanographic data, emphasizing a new global dataset characterizing mesoscale eddies from satellite altimetry data. A proximity-probability approach coupled with odds ratio testing was used to infer orientation to eddy features. Comparisons against random points, simulated particle tracks, and drifter buoys were used to demonstrate turtle differential responses to eddies inside and outside the hotspot, depending on eddy features (i.e. cyclonic vs. anticyclonic, edges vs. centres). Turtles inside the hotspot utilize fewer strong cyclonic eddy edges than those outside. Marine Biology Telemetry Tagged animal Marine Animal Survey Sea turtles Animal tagging Radio transmitters N/A Metadata for individual animals / trackings including PTT Type, Duty cycle, Date deployed, Deployment location, Tag nos., Final location, Date terminated, Distance traveled, Transmitting days, Mean Speed of Travel, Capture status are available upon request. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License. https://seamap.env.duke.edu/dataset/1304 Oceans,Taiwan,Pacific,Caretta caretta,Hot spot,China Sea 104.059 166.18 40.809 1.807 2002-05-05 2012-08-04 Scientific names are based on the Integrated Taxonomic Information System (ITIS). species Caretta caretta Loggerhead sea turtle Define habitat use of loggerhead sea turtle, <i>Caretta caretta </i> in the Pacific Ocean Basin. notPlanned Denise Parker NOAA Pacific Islands Fisheries Science Center Primary contact denise.m.parker@outlook.com NA NA NA Loggerhead turtle movement off the coast of Taiwan Denise Parker owner George Balazs originator Jeffrey Polovina originator NA zd_1304 2025-07-31T16:40:58-04:00 dataset Parker, D., G. Balazs and J. Polovina. 2015. Loggerhead turtle movement off the coast of Taiwan. Version 1.0.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/6b228135. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/1304 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/1304/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/1304/eml OBIS-SEAMAP zd_1304 zd_1304 Kobayashi, D.R., I.-J. Cheng, D.M. Parker, J.J. Polovina, N. Kamezaki, and G.H. Balazs. 2011. Loggerhead turtle (Caretta caretta) movement off the coast of Taiwan: characterization of a hotspot in the East China Sea and investigation of mesoscale eddies. ICES J. Mar. Sci: 12p.