Influence de la temperature sur la differentiation sexuelle des gonades chez la tortue luth (Dermochelys coriacea ); etude en incubation artificielle et naturelle

Sexual differentiation of the marine leatherback turtle is sensitive to temperature. Incubation of eggs below 29 degree C results in 100% males, whereas incubationa bove 30 degree C results in 100% potential females at hatching. Therefore, the threshold temperature lies between 29 and 30 degree C as has been found for other marine turtles (Caretta caretta, Chelonia mydas ). Among hatchlings from natural nests in French Guiana, 10% were males, 20% were potential females and 70% had an intermediate phenotype. The sand temperature at 60 cm of depth, near one nest, was recorded and was found to vary between 29 and 30 degree C during the presumed thermosensitive period. These results will be useful to marine turtle hatcheries which seek to manipulate sex ratios among their neonates.

Auteurs du document :

Rimblot, F, Fretey, J, Lescure, J, Pieau, C

Obtenir le document :

Actes de colloques. Ifremer. Brest [ACTES COLLOQ. IFREMER.]. 1985

Mots clés :

Dermochelys coriacea, Chelonia mydas, Reptilia, Hatcheries, Natural populations, Incubation, Turtle culture, Eggs, Temperature effects, Sexual dimorphism

Thème (issu du Text Mining) :

SCIENCES EXACTES SCIENCES HUMAINES, AMENAGEMENTS DES EAUX

Date :

1983-12

Format :

text/xml

Langue :

Inconnu

Droits d'utilisation :

info:eu-repo/semantics/openAccess, restricted use

Télécharger les documents :

http://archimer.ifremer.fr/doc/1983/acte-1241.pdf
http://archimer.ifremer.fr/doc/00000/1241/