Biological studies reveal new turtle behaviors and penguin species

Satellite tracking of nine yellow morph green sea turtles in the Galápagos Islands has revealed previously undocumented behavior. While these turtles are typically known for migrating thousands of kilometers between feeding grounds and breeding beaches, researchers found that these specific individuals remained within the Marine Reserve for months or even over a year, moving quietly between nearby islands instead of embarking on a major migration.

The study highlights the coexistence of two distinct morphotypes—black and yellow—within the same coastal waters. While the black morphotype is concentrated in the eastern Pacific, the yellow morphotype is usually linked to the western Pacific. This overlap provides a unique natural laboratory for studying how these two genetic variants share territory.

In a separate biological discovery, researchers studying penguins on the Kerguelen Islands have proposed that the Gentoo penguin should be divided into four distinct species. After analyzing 64 genomes and comparing vocalizations, feeding habits, and physical measurements, scientists identified a unique species, Pygoscelis kerguelensis, residing in the Kerguelen archipelago. The findings suggest that long-term isolation has driven significant evolutionary divergence.