New colonisers drive the increase of the emerging loggerhead turtle nesting in Western Mediterranean
Luna-Ortiz, Astrid (Universitat de Barcelona)
Marin-Capuz, Gisela (Universitat de Barcelona)
Abella, Elena (Universitat de Vic)
Crespo Picazo, José Luis (Ciutat de les Arts i les Ciències)
Escribano, Fernando (Centro de Recuperación de Fauna Silvestre "El Valle" (Murcia))
Felix, Guillem (Consorci per a la Recuperació de la Fauna de les Illes Balears)
Giralt, Silvia (Fundación para la Conservación y la Recuperación de Animales Marinos)
Tomás, Jesús (Universitat de València)
Pegueroles Queralt, Maria Cinta (Universitat de Barcelona)
Pascual, Marta (Universitat de Barcelona)
Carreras, Carles (Universitat de Barcelona)

Fecha:	2024
Descripción:	13 pàg.
Resumen:	The loggerhead sea turtle (Caretta caretta) is sensitive to climate change and is responding by colonising the Western Mediterranean. To understand the rapid nesting increase in recent years in Spain, we sampled 45 hatchlings from 8 nests between 2016 and 2019. We sequenced a mtDNA D-loop region, genotyped 2291 SNPs using 2bRAD and collected data on clutch size, hatching success, and incubation duration. We confirmed that the colonisation has a Mediterranean and Atlantic mixed origin and we detected that these nests were laid by different females, except for two nests within the same season. Our results suggest that the recent increase in nesting is due to an increase in the number of colonising individuals rather than females born in the same area returning to breed. We hypothesize that this increase in the number of colonisers results from successful conservation efforts, feminisation of the populations of origin and earlier sexual maturation. However, the percentage of offspring females produced in Spain suggests that future returning individuals will aid to the settlement of the new population. These results allow defining the current status of this colonisation although future efforts are needed to detect remigrants to confirm the establishment of a resident population.
Ayudas:	Agencia Estatal de Investigación PID2020-118550RB Generalitat de Catalunya 2021/SGR-01271
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Sea-turtle ; Caretta-caretta ; Climate-change ; Marine turtles ; Green turtles ; Population ; Temperature ; Conservation ; Behavior ; Ratio ; SDG 13 - Climate Action ; SDG 14 - Life Below Water
Publicado en:	Scientific reports, Vol. 14 (January 2024) , art. 1506, ISSN 2045-2322

DOI: 10.1038/s41598-024-51664-w
PMID: 38233518

13 p, 1.6 MB

El registro aparece en las colecciones:
Artículos > Artículos de investigación
Artículos > Artículos publicados