Satellite tracking and stable isotope analysis highlight differential recruitment among foraging areas in green turtles

Identifying links between breeding and non-breeding sites in migratory animals is an important step in understanding their ecology. Recognising the relative importance of foraging areas and ascertaining site-specific levels of recruitment can provide fundamental and applied insights. Here, satellite...

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Autores: Bradshaw, Phil J., Broderick, Annette C., Carreras Huergo, Carlos, Inger, Richard, Fuller, Wayne J., Snape, Robin, Stokes, Kimberley L., Godley, Brendan J.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/122945
Acceso en línea:https://hdl.handle.net/2445/122945
Access Level:acceso abierto
Palabra clave:Tortugues marines
Migració d'animals
Sea turtles
Animal migration
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spelling Satellite tracking and stable isotope analysis highlight differential recruitment among foraging areas in green turtlesBradshaw, Phil J.Broderick, Annette C.Carreras Huergo, CarlosInger, RichardFuller, Wayne J.Snape, RobinStokes, Kimberley L.Godley, Brendan J.Tortugues marinesMigració d'animalsSea turtlesAnimal migrationIdentifying links between breeding and non-breeding sites in migratory animals is an important step in understanding their ecology. Recognising the relative importance of foraging areas and ascertaining site-specific levels of recruitment can provide fundamental and applied insights. Here, satellite telemetry and the stable isotope ratios (δ13C, δ15N and δ34S) of 230 green turtles Chelonia mydas from a regionally important rookery in northern Cyprus were employed to evaluate the relative importance of 4 foraging areas. A preliminary analysis of stable isotope ratios suggested that a major foraging area had been missed through satellite telemetry as a large proportion of turtles had isotope ratios that did not correspond to sites previously identified. Stable isotope ratios were then employed to select 5 turtles to be fitted with platform terminal transmitters in 2015. All 5 turtles were subsequently tracked to the same location, Lake Bardawil in Egypt. Serially collected tissue samples from 45 females, ranging over 2 to 4 breeding seasons, suggested that foraging site fidelity was very common, with 82% of females exhibiting extremely high temporal consistency in isotope ratios. Quantifying fidelity allowed an evaluation of foraging area - specific contributions to each breeding cohort over the past 2 decades and demonstrated that recruitment was unequal among sites, and dynamic over time, with Egypt now currently the major contributor to the nesting aggregation. This work demonstrates the utility of stable isotope analysis to elucidate the spatial ecology of cryptic taxa and illustrates how more robust baselines can be assembled against which to measure the success of future marine conservation initiatives.Inter-Research2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/122945Articles publicats en revistes (Genètica, Microbiologia i Estadística)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.3354/meps12297Marine Ecology Progress Series, 2017, vol. 582, p. 201-214https://doi.org/10.3354/meps12297(c) Inter-Research, 2017info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1229452026-05-27T06:46:51Z
dc.title.none.fl_str_mv Satellite tracking and stable isotope analysis highlight differential recruitment among foraging areas in green turtles
title Satellite tracking and stable isotope analysis highlight differential recruitment among foraging areas in green turtles
spellingShingle Satellite tracking and stable isotope analysis highlight differential recruitment among foraging areas in green turtles
Bradshaw, Phil J.
Tortugues marines
Migració d'animals
Sea turtles
Animal migration
title_short Satellite tracking and stable isotope analysis highlight differential recruitment among foraging areas in green turtles
title_full Satellite tracking and stable isotope analysis highlight differential recruitment among foraging areas in green turtles
title_fullStr Satellite tracking and stable isotope analysis highlight differential recruitment among foraging areas in green turtles
title_full_unstemmed Satellite tracking and stable isotope analysis highlight differential recruitment among foraging areas in green turtles
title_sort Satellite tracking and stable isotope analysis highlight differential recruitment among foraging areas in green turtles
dc.creator.none.fl_str_mv Bradshaw, Phil J.
Broderick, Annette C.
Carreras Huergo, Carlos
Inger, Richard
Fuller, Wayne J.
Snape, Robin
Stokes, Kimberley L.
Godley, Brendan J.
author Bradshaw, Phil J.
author_facet Bradshaw, Phil J.
Broderick, Annette C.
Carreras Huergo, Carlos
Inger, Richard
Fuller, Wayne J.
Snape, Robin
Stokes, Kimberley L.
Godley, Brendan J.
author_role author
author2 Broderick, Annette C.
Carreras Huergo, Carlos
Inger, Richard
Fuller, Wayne J.
Snape, Robin
Stokes, Kimberley L.
Godley, Brendan J.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Tortugues marines
Migració d'animals
Sea turtles
Animal migration
topic Tortugues marines
Migració d'animals
Sea turtles
Animal migration
description Identifying links between breeding and non-breeding sites in migratory animals is an important step in understanding their ecology. Recognising the relative importance of foraging areas and ascertaining site-specific levels of recruitment can provide fundamental and applied insights. Here, satellite telemetry and the stable isotope ratios (δ13C, δ15N and δ34S) of 230 green turtles Chelonia mydas from a regionally important rookery in northern Cyprus were employed to evaluate the relative importance of 4 foraging areas. A preliminary analysis of stable isotope ratios suggested that a major foraging area had been missed through satellite telemetry as a large proportion of turtles had isotope ratios that did not correspond to sites previously identified. Stable isotope ratios were then employed to select 5 turtles to be fitted with platform terminal transmitters in 2015. All 5 turtles were subsequently tracked to the same location, Lake Bardawil in Egypt. Serially collected tissue samples from 45 females, ranging over 2 to 4 breeding seasons, suggested that foraging site fidelity was very common, with 82% of females exhibiting extremely high temporal consistency in isotope ratios. Quantifying fidelity allowed an evaluation of foraging area - specific contributions to each breeding cohort over the past 2 decades and demonstrated that recruitment was unequal among sites, and dynamic over time, with Egypt now currently the major contributor to the nesting aggregation. This work demonstrates the utility of stable isotope analysis to elucidate the spatial ecology of cryptic taxa and illustrates how more robust baselines can be assembled against which to measure the success of future marine conservation initiatives.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/122945
url https://hdl.handle.net/2445/122945
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3354/meps12297
Marine Ecology Progress Series, 2017, vol. 582, p. 201-214
https://doi.org/10.3354/meps12297
dc.rights.none.fl_str_mv (c) Inter-Research, 2017
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Inter-Research, 2017
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Inter-Research
publisher.none.fl_str_mv Inter-Research
dc.source.none.fl_str_mv Articles publicats en revistes (Genètica, Microbiologia i Estadística)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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