Características sedimentológicas de la Playa de Calheta de PAU (Isla de Boa Vista, República de Cabo Verde): implicaciones en la anidación de Caretta caretta (Linnaeus, 1758)

Programa de doctorado en Oceanografía

Desarrollo embrionario de Caretta caretta: análisis descriptivo de su evolución morfológica

Programa de Doctorado en Oceanografía

Tendencias espacio-temporales en las capturas accidentales de tortuga boba (Caretta caretta) en la costa catalana entre los años 2000 y 2009

Se describen las tendencias en las capturas accidentales de tortuga boba (Caretta caretta) a lo largo de la costa catalana (Mediterráneo occidental) a partir de los datos del Centro de Recuperación de Animales Marinos de Cataluña. En Girona, la provincia más septentrional y base de la fracción mayor de la flota pesquera de Cataluña, es donde se produce un mayor número de capturas accidentales de esta especie. La mayoría de estas capturas se dan en los meses de verano, coincidiendo con el mayor esfuerzo pesquero del año. La gran mayoría de los individuos son capturados vivos, siendo el palangre el aparejo que provoca más de la mitad de las capturas incidentales en esta región. ABSTRACT: Trends in the loggerhead turtle (Caretta caretta) captured along the Catalonian coasts (Western Mediterranean) are described using data collected by the Marine Animal Rescue Centre of Catalonia. Girona, the most northerly province and base of the greater fraction of the fishing fleet of Catalonia, is the area where the greater part of loggerhead turtle was captured, particularly during the summer, coinciding with the higher fishing effort season. The majority of individuals were caught alive, and the longline appeared to be the fishing gear that causes more than half of the incidental captures in this region

Biología reproductora de la tortuga boba (Caretta caretta Linneo, 1758) en la isla de Boavista, archipiélago de Cabo Verde

[ES]Este trabajo analiza diversos aspectos de la biología reproductora de la población nidificante de tortuga boba (Caretta caretta) en el archipiélago de Cabo Verde. Se estudiaron datos relacionados con la temporada de anidación, con la morfometría de las hembras, con el éxito de las salidas a tierra, con el tiempo de incubación y con el éxito de los nidos.

Voluntariado ambiental para la conservación de la Tortuga Boba (Caretta caretta) en la isla de Boa Vista

[ES]Cabo Verde Natura 2000 es una organización sin ánimo de lucro que en colaboración con ADS-Biodiversidad organiza, desde 1998, un voluntariado ambiental para la protección de la población de tortuga boba (Caretta caretta) de Cabo Verde. El 90 % de esta población nidifica en la isla de Boa Vista, donde la ONG tiene su centro de actuación. Cada temporada (de Junio a Octubre) acuden a los campamentos de Cabo Verde Natura 2000 cientos de voluntarios dispuestos a colaborar con la causa y vivir una experiencia única. Buscamos voluntarios para la campaña 2016. hablaremos de la importancia de la conservación de la población de tortugas marinas de Cabo Verde, de las actividades se realizan desde la ONG y de cómo participar.

Atresia of the esophagus in the embryo of the logerhead turtle (Caretta caretta):

Mode of access: Internet.

Interplay between plasma hormone profiles, sex and body condition in immature hawksbill turtles (Eretmochelys imbricata) subjected to a capture stress protocol

We investigated plasma hormone profiles of corticosterone and testosterone in immature hawksbill turtles (Eretmochelys imbricata) in response to a capture stress protocol. Further, we examined whether sex and body condition were covariates associated with variation in the adrenocortical response of immature turtles. Hawksbill turtles responded to the capture stress protocol by significantly increasing plasma levels of corticosterone over a 5 h period. There was no significant sex difference in the corticosterone stress response of immature turtles. Plasma testosterone profiles, while significantly different between the sexes, did not exhibit a significant change during the 5 h capture stress protocol. An index of body condition was not significantly associated with a turtle's capacity to produce plasma corticosterone both prior to and during exposure to the capture stress protocol. In summary, while immature hawksbill turtles exhibited an adrenocortical response to a capture stress protocol, neither their sex nor body condition was responsible for variation in endocrine responses. This lack of interaction between the adrenocortical response and these internal factors suggests that the inactive reproductive- and the current energetic- status of these immature turtles are important factors, that could influence plasma hormone profiles during stress. (C) 2003 Elsevier Inc. All rights reserved.

Satellite tracking of adult loggerheads (Caretta caretta L.) around waters of Cape Verde Archipielago (Western Africa)

[EN] During the 1999 nesting season (from June to October), four satellite transmitters were attached to two males and two females of Caretta caretta from Boavista Island (Cape Verde Archipelago, western Africa), where density of nesting females is the highest in the whole archipelago. Transmitters did not work as well as expected, resulting in a low number of locations, possibly due to the neritic behavior of adult loggerheads at reproductive habitat, with the antennae exposed to continuous rubbing. Therefore, we establish a conservative hypothesis about movements of C.caretta in Cape Verde.

Fusarium solani is responsible for mass mortalities in nests of loggerhead sea turtle, Caretta caretta, in Boavista, Cape Verde

[EN] The fungus Fusarium solani (Mart.) Saccardo (1881) was found to be the cause of infections in the eggs of the sea turtle species Caretta caretta in Boavista Island, Cape Verde. Egg shells with early and severe symptoms of infection, as well as diseased embryos were sampled from infected nests. Twenty-five isolates with similar morphological characteristics were obtained. Their ITS rRNA gene sequences were similar to the GenBank sequences corresponding to F. solani and their maximum identity ranged from 95% to 100%.

Twelve new polymorphic microsatellite markers from the loggerhead sea turtle (Caretta caretta) and cross-species amplification on other marine turtle species

[EN] We describe 12 new polymorphic dinucleotide microsatellite loci and multiplex Polymerase Chain Reaction conditions from the loggerhead sea turtle Caretta caretta. Levels of polymorphism were assessed in 50 individuals from the nesting population of the Cape Verde Islands.

Estudio genético de paternidad múltiple de la tortuga común Caretta caretta en el Archipiélago de Cabo Verde: aplicación a la ecología de la conservación.

[EN] Los análisis genéticos de las estrategias reproductivas (paternidad múltiple y almacenamiento de esperma) están abriendo una vía de investigación novedosa además de promover informaciones importantes para definir los criterios y las medidas de conservación de muchas especies de reptiles. La población de tortuga común, Caretta caretta del Archipiélago de Cabo Verde es una de las poblaciones nidificantes más grandes del Atlántico, pero que actualmente sufre la pesca selectiva de machos por parte de la comunidad local de Cabo Verde. En este estudio se pretende testar la hipótesis de que una disminución significativa en el número de machos podría afectar la eficacia biológica de las crías, disminuyendo la variabilidad genética de la población.

Comportamiento del buceo en crías de tortuga boba (Caretta caretta) en cautiverio

[ES]Uno de los aspectos más desconocidos de la tortuga boba, y de las tortugas marinas en general, es el comportamiento del buceo. Debido a las largas distancias que recorre la especie lejos de la costa para alimentarse, este aspecto ha sido siempre difícil de estudiar.

Rate predation on the nesting of Caretta caretta because of Ocypode cursor in Calheta de Pau beach, Boa Vista Island (Cape Verde Rep.)

[EN] Located in the Cape Verde Archipelago is one of the most important nesting population of Caretta caretta, Boa Vista Island being the principal nesting area. This population has been subject of research since 1998.

Conservation genetics of North Atlantic loggerhead sea turtles: analysis of nuclear and mitochondrial DNA

[EN] Complex population structure has been described for the loggerhead sea turtle (Caretta caretta), revealing lower levels of population genetic structure in nuclear compared to mitochondrial DNA assays. This may result from mating during spatially overlapping breeding migrations, or male-biased dispersal as previously found for the green turtle (Chelonia mydas). To further investigate these multiple possibilities, we carried out a comparative analysis from twelve newly developed microsatellite loci and the mitochondrial DNA control region (~804 bp) in adult females of the Cape Verde Islands (n=158), and Georgia, USA (n=17).