Lifespan estimation in marine turtles using genomic promoter CpG density

Area of Science:

• Zoology and Conservation Biology
• Genomics and Molecular Ecology

Background:

• Accurately defining maximum lifespan is crucial for wildlife management, impacting population viability and reproductive potential assessments.
• Estimating lifespan in long-lived, migratory species like marine turtles is particularly challenging due to tracking difficulties.
• Vertebrate maximum lifespan has recently been linked to gene promoter cytosine-phosphate-guanine (CpG) density.

Purpose of the Study:

• To utilize gene promoter CpG density as a predictive tool for estimating the maximum lifespan of five marine turtle species.
• To overcome the inherent difficulties in tracking marine turtles throughout their entire lives for lifespan determination.

Main Methods:

• Sanger sequencing was employed to determine CpG density within selected gene promoters of marine turtles.
• CpG density data was analyzed to predict the maximum lifespan for each of the five studied species.

Main Results:

• Predicted maximum lifespans for marine turtles varied significantly, from 50.4 years for the flatback turtle (Natator depressus) to 90.4 years for the leatherback turtle (Dermochelys coriacea).
• The findings demonstrate a correlation between CpG density and maximum lifespan in marine turtles.

Conclusions:

• Gene promoter CpG density provides a viable method for predicting maximum lifespan in challenging species like marine turtles.
• These predictions offer valuable insights for marine turtle research, including life cycle understanding and population viability analyses.
• The approach has broad applications for wildlife management and conservation of long-lived species.