Estimación de la proporción de sexos de crías de tortugas marinas caguama, mediante la duración de incubación y temperatura de los nidos en las playas de Sirte (Libia)

Autores/as

  • Imed Jribi Sfax Faculty of Sciences, University of Sfax
  • Abdelmaula Hamza Libyan Sea Turtle Program-Environment General Authority
  • Almoktar Saied Libyan Sea Turtle Program-Environment General Authority
  • Atef Ouergui Regional Activity Centre for Specially Protected Areas

DOI:

https://doi.org/10.3989/scimar.03855.28B

Palabras clave:

tortuga boba, crías, proporción de sexos, duración de la incubación, temperatura del nido, Libia

Resumen


Se ha efectuado una estimación de proporción de sexos en las crías de tortugas marinas caguama (Caretta caretta) en las playas cerca de Sirte (Libia) utilizando dos métodos: la duración de la incubación y la temperatura media del nido durante el segundo tercio del período de incubación. Se registraron electrónicamente los valores de temperatura/humedad en un total de 13 nidos seleccionados en Al-Ghbeba, Al-Thalateen, zona oeste de Al-Thalateen, Shash y Al-Arbaeen. El período de incubación varió desde 47 hasta 58 días y la temperatura media osciló desde 29 hasta 31.8°C. La temperatura máxima durante este período aumentó entre 0,6 y 3.5°C, mientras que la temperatura media también aumentó durante el segundo tercio del período de incubación en comparación con el primer tercio y siguió aumentando durante el último tercio. Como era de esperar, este estudio mostró que la temperatura en el nido disminuyó con el aumento de la profundidad de la jerarquía. Los resultados basados en la duración de la incubación mostraron una sex-ratio en favor de las hembras del 85.4%, mientras que este valor fue del 70.4% si los resultados se basaban en la temperatura media. Estos datos concuerdan con los estudios efectuados en el Mediterráneo y en otras zonas, en los que se aprecia una sex-ratio altamente sesgada en favor de las hembras.

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2013-12-30

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1.
Jribi I, Hamza A, Saied A, Ouergui A. Estimación de la proporción de sexos de crías de tortugas marinas caguama, mediante la duración de incubación y temperatura de los nidos en las playas de Sirte (Libia). Sci. mar. [Internet]. 30 de diciembre de 2013 [citado 22 de julio de 2024];77(4):617-24. Disponible en: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1485

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