Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications
- Autores
- Gómez de Segura, A.; Tomás, J.; Pedraza, Susana Noemi; Crespo, Enrique Alberto; Raga, Juan Antonio
- Año de publicación
- 2006
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- During 2 years (2001–2003), we performed seasonal aerial surveys in the central Spanish Mediterranean following the transect line methodology in order to determine the abundance and distribution patterns of loggerhead turtles Caretta caretta. We surveyed a total of 16 700 km, accounting for 770 turtle sightings. Loggerhead turtles were present with high abundance all year round. No seasonal differences in abundance were found, except in spring 2001, where the density of turtles was higher than in the other seasons. Our results show that the Western Mediterranean is not a ‘summer’ feeding area as proposed previously, as a high number of turtles are present throughout the year. The average surface density of turtles in the whole study area was 0.21 turtles km 2 [95% confidence interval (CI): 0.17–0.25], and the mean abundance was 6653 turtles (95% CI: 5514–8027). The data relate to the number of turtles on the surface only, as diving turtles escape observation. Correcting our estimations of diving behaviour data in the area, the absolute abundance was 18 954 turtles (95% CI: 6679–53 786). Bearing in mind that around 25 000 loggerheads are caught per year in the Spanish Mediterranean, our results indicate that accidental captures seem to be a significant threat for this species, and conservation measures have to be implemented to avoid a non- sustainable situation.
Fil: Gómez de Segura, A.. Cavanilles Institute of Biodiversity and Evolutionary Biology. Marine Zoology Unit; España
Fil: Tomás, J.. Cavanilles Institute of Biodiversity and Evolutionary Biology. Marine Zoology Unit; España. L’Oceanográfic; España
Fil: Pedraza, Susana Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Raga, Juan Antonio. Cavanilles Institute of Biodiversity and Evolutionary Biology. Marine Zoology Unit; España - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/16787
Ver los metadatos del registro completo
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Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implicationsGómez de Segura, A.Tomás, J.Pedraza, Susana NoemiCrespo, Enrique AlbertoRaga, Juan Antoniohttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1During 2 years (2001–2003), we performed seasonal aerial surveys in the central Spanish Mediterranean following the transect line methodology in order to determine the abundance and distribution patterns of loggerhead turtles Caretta caretta. We surveyed a total of 16 700 km, accounting for 770 turtle sightings. Loggerhead turtles were present with high abundance all year round. No seasonal differences in abundance were found, except in spring 2001, where the density of turtles was higher than in the other seasons. Our results show that the Western Mediterranean is not a ‘summer’ feeding area as proposed previously, as a high number of turtles are present throughout the year. The average surface density of turtles in the whole study area was 0.21 turtles km 2 [95% confidence interval (CI): 0.17–0.25], and the mean abundance was 6653 turtles (95% CI: 5514–8027). The data relate to the number of turtles on the surface only, as diving turtles escape observation. Correcting our estimations of diving behaviour data in the area, the absolute abundance was 18 954 turtles (95% CI: 6679–53 786). Bearing in mind that around 25 000 loggerheads are caught per year in the Spanish Mediterranean, our results indicate that accidental captures seem to be a significant threat for this species, and conservation measures have to be implemented to avoid a non- sustainable situation.Fil: Gómez de Segura, A.. Cavanilles Institute of Biodiversity and Evolutionary Biology. Marine Zoology Unit; EspañaFil: Tomás, J.. Cavanilles Institute of Biodiversity and Evolutionary Biology. Marine Zoology Unit; España. L’Oceanográfic; EspañaFil: Pedraza, Susana Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Raga, Juan Antonio. Cavanilles Institute of Biodiversity and Evolutionary Biology. Marine Zoology Unit; EspañaWiley Blackwell Publishing, Inc2006-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/16787Gómez de Segura, A.; Tomás, J.; Pedraza, Susana Noemi; Crespo, Enrique Alberto; Raga, Juan Antonio; Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications; Wiley Blackwell Publishing, Inc; Animal Conservation; 9; 2; 12-2006; 199-2061367-9430enginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1469-1795.2005.00014.xinfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/j.1469-1795.2005.00014.x/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:10:05Zoai:ri.conicet.gov.ar:11336/16787instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:10:05.282CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications |
title |
Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications |
spellingShingle |
Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications Gómez de Segura, A. |
title_short |
Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications |
title_full |
Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications |
title_fullStr |
Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications |
title_full_unstemmed |
Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications |
title_sort |
Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications |
dc.creator.none.fl_str_mv |
Gómez de Segura, A. Tomás, J. Pedraza, Susana Noemi Crespo, Enrique Alberto Raga, Juan Antonio |
author |
Gómez de Segura, A. |
author_facet |
Gómez de Segura, A. Tomás, J. Pedraza, Susana Noemi Crespo, Enrique Alberto Raga, Juan Antonio |
author_role |
author |
author2 |
Tomás, J. Pedraza, Susana Noemi Crespo, Enrique Alberto Raga, Juan Antonio |
author2_role |
author author author author |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
During 2 years (2001–2003), we performed seasonal aerial surveys in the central Spanish Mediterranean following the transect line methodology in order to determine the abundance and distribution patterns of loggerhead turtles Caretta caretta. We surveyed a total of 16 700 km, accounting for 770 turtle sightings. Loggerhead turtles were present with high abundance all year round. No seasonal differences in abundance were found, except in spring 2001, where the density of turtles was higher than in the other seasons. Our results show that the Western Mediterranean is not a ‘summer’ feeding area as proposed previously, as a high number of turtles are present throughout the year. The average surface density of turtles in the whole study area was 0.21 turtles km 2 [95% confidence interval (CI): 0.17–0.25], and the mean abundance was 6653 turtles (95% CI: 5514–8027). The data relate to the number of turtles on the surface only, as diving turtles escape observation. Correcting our estimations of diving behaviour data in the area, the absolute abundance was 18 954 turtles (95% CI: 6679–53 786). Bearing in mind that around 25 000 loggerheads are caught per year in the Spanish Mediterranean, our results indicate that accidental captures seem to be a significant threat for this species, and conservation measures have to be implemented to avoid a non- sustainable situation. Fil: Gómez de Segura, A.. Cavanilles Institute of Biodiversity and Evolutionary Biology. Marine Zoology Unit; España Fil: Tomás, J.. Cavanilles Institute of Biodiversity and Evolutionary Biology. Marine Zoology Unit; España. L’Oceanográfic; España Fil: Pedraza, Susana Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina Fil: Raga, Juan Antonio. Cavanilles Institute of Biodiversity and Evolutionary Biology. Marine Zoology Unit; España |
description |
During 2 years (2001–2003), we performed seasonal aerial surveys in the central Spanish Mediterranean following the transect line methodology in order to determine the abundance and distribution patterns of loggerhead turtles Caretta caretta. We surveyed a total of 16 700 km, accounting for 770 turtle sightings. Loggerhead turtles were present with high abundance all year round. No seasonal differences in abundance were found, except in spring 2001, where the density of turtles was higher than in the other seasons. Our results show that the Western Mediterranean is not a ‘summer’ feeding area as proposed previously, as a high number of turtles are present throughout the year. The average surface density of turtles in the whole study area was 0.21 turtles km 2 [95% confidence interval (CI): 0.17–0.25], and the mean abundance was 6653 turtles (95% CI: 5514–8027). The data relate to the number of turtles on the surface only, as diving turtles escape observation. Correcting our estimations of diving behaviour data in the area, the absolute abundance was 18 954 turtles (95% CI: 6679–53 786). Bearing in mind that around 25 000 loggerheads are caught per year in the Spanish Mediterranean, our results indicate that accidental captures seem to be a significant threat for this species, and conservation measures have to be implemented to avoid a non- sustainable situation. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-12 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/16787 Gómez de Segura, A.; Tomás, J.; Pedraza, Susana Noemi; Crespo, Enrique Alberto; Raga, Juan Antonio; Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications; Wiley Blackwell Publishing, Inc; Animal Conservation; 9; 2; 12-2006; 199-206 1367-9430 |
url |
http://hdl.handle.net/11336/16787 |
identifier_str_mv |
Gómez de Segura, A.; Tomás, J.; Pedraza, Susana Noemi; Crespo, Enrique Alberto; Raga, Juan Antonio; Abundance and distribution of the endangered loggerhead turtle in Spanish Mediterranean waters and the conservation implications; Wiley Blackwell Publishing, Inc; Animal Conservation; 9; 2; 12-2006; 199-206 1367-9430 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1469-1795.2005.00014.x info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/j.1469-1795.2005.00014.x/abstract |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Wiley Blackwell Publishing, Inc |
publisher.none.fl_str_mv |
Wiley Blackwell Publishing, Inc |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613986221293568 |
score |
13.070432 |