Girafes : Découverte de quatre espèces distinctes
Dateline : [VILLE] – 29 Février 2024
Okay, here’s a breakdown of the text provided, summarizing the key information:
Main Point:
recent genetic analysis has led scientists to reclassify giraffes, recognizing four distinct species rather of previously thought subspecies. This classification is based on genetic differences, not just coat patterns (spots).
Key Details:
Genetic Analysis: Researchers analyzed genetic samples from over 2,000 giraffes across Africa over the past 20 years. The cost of genome sequencing has dramatically decreased (from tens of thousands of dollars to around $100),making this research more accessible.
Anatomical Differences: Differences in skull shape (specifically the bony protrusions on the forehead, often called “horns”) were also analyzed. These are permanent skull features, unlike antlers.
Notable Differences: The studies revealed significant differences between the four species.
Image: The article includes an image of a reticulated giraffe, credited to Michael Brown/IUCN via AP.
In essence, the article highlights a shift in how giraffes are classified, moving from a focus on appearance to a more scientifically rigorous approach based on genetics.