Synchrony on embryonic development of marine turtles: individual variability and environmental effectsReportar como inadecuado




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Materias : 24 Ciencias de la vida2401 Biología animal (zoología)240116 Herpetología240107 Embriología animal

Fecha de publicación : 2012

Fecha de depósito: 21-jun-2016

Tipo de documento: Resumen

Resumen : EN For sea turtles, to hatch and emerge from the nest communally is essential to decrease hatchling mortality. Thus, it is very important within a nest the simultaneous fertilization and the synchronized embryonic development of all eggs. On loggerhead nesting beaches of Cape Verde we have studied the individual variability on developmental synchrony of embryos and the influence on this process of some biological, environmental and management factors. We have compared this trait within and between 34 nests naturally incubated on the beach and 34 nests relocated to a beach hatchery during the 2009 and 2010 nesting seasons.

En : 31st ISTS Symposium on Sea Turtle Biology and Conservation, San Diego, California, USA. 2011. Pag 54-55





Autor: Pérez García, HéctorGarcía Cerdá, Rosa MaríaFernández Gil, BelénMarco, AdolfoAbu Raya, MaraLópez-Jurado, Luis Felipe

Fuente: https://acceda.ulpgc.es


Introducción



31st ISTS Symposium on Sea Turtle Biology and Conservation, San Diego, California, USA.
2011.
Pag 54-55 SYNCHRONY ON EMBRYONIC DEVELOPMENT OF MARINE TURTLES: INDIVIDUAL VARIABILITY AND ENVIRONMENTAL EFFECTS Héctor Pérez-García1, Rosa García Cerdá2, Belén Fernández-Gil1, Adolfo Marco1, Mara AbuRaya3, and Luis F.
López-Jurado2 1 Estación Biológica de Doñana, CSIC, Seville, Spain 2 Department of Biology, Universidad de Las Palmas de Gran Canaria, Spain 3 Department of Marine Biology, University of Cape Verde, Cape Verde Abstract For sea turtles, to hatch and emerge from the nest communally is essential to decrease hatchling mortality.
Thus, it is very important within a nest the simultaneous fertilization and the synchronized embryonic development of all eggs.
On loggerhead nesting beaches of Cape Verde we have studied the individual variability on developmental synchrony of embryos and the influence on this process of some biological, environmental and management factors. We have compared this trait within and between 34 nests naturally incubated on the beach and 34 nests relocated to a beach hatchery during the 2009 and 2010 nesting seasons.
As an honest non-invasive indicator of embryonic development we have used the size of the white embryonic disc that it is externally visible and grow on the eggshell during the first 10 days of development.
We studied the white spot at the first 48 hours of incubation and for 36 of these nests from both locations we also studied the white spot at the first 6 days (144 hours) of incubation.
The rest of the nests where not studied at this second time to assess the possible effect of the experimental manipulation at day 6 on embryo viability.
Because of the 2009 season results showed a delayed embryonic development within the first hours after egg laying, in 2010 season, we have done an additional study to improve our knowledge about the causes that explain such delay.
We relocated 10 fresh-laid nests to a location ve...






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