Scientists Identify Four Distinct Gentoo Penguin Species Including a New One on Kerguelen Islands

Discovery of a New Gentoo Penguin Species on the Kerguelen Islands

According to НВ — Техно: Researchers have uncovered a previously unknown species of gentoo penguin inhabiting the Kerguelen Islands after analyzing the genetics of 64 penguins from 10 different colonies. Their findings reveal that what was once considered a single species actually comprises four genetically distinct species, each adapted to their unique environments. This discovery highlights the vulnerability of island-dwelling penguins to climate change and human activities.

The newly identified penguin species has been named Pygoscelis kerguelensis and is native to the Kerguelen Islands located in the southern Indian Ocean. Alongside it, gentoo penguins are now recognized as four separate species:

• Pygoscelis taeniata
• Pygoscelis papua
• Pygoscelis ellsworthi

Pygoscelis taeniata is found on the Crozet, Marion, and Macquarie Islands, while Pygoscelis papua inhabits the Falkland (Malvinas) Islands and Martillo Island. Pygoscelis ellsworthi ranges across Antarctica, including the Antarctic Peninsula and South Georgia Island.

Evolutionary Background and Threats Facing Gentoo Penguins

Genetic traits among gentoo penguins are linked to heat production, fat storage, light perception, oxygen efficiency, and the ability to dive for extended periods. The four species diverged approximately 300,000 to 500,000 years ago, illustrating their evolutionary adaptation to different habitats. Their diet is diverse, consisting of fish, krill, squid, and cuttlefish.

Climate projections suggest that by 2050, suitable habitats for island-dwelling gentoo penguins could decline sharply due to global warming, whereas Antarctic populations might expand their range. Other Antarctic penguin species, such as emperor and Adélie penguins, face significant threats from diminishing sea ice and changes in krill populations.

Island gentoo penguins confront multiple risks including:

• Rising ocean temperatures
• Habitat destruction
• Predation
• Competition with commercial fisheries
• Bycatch in fishing nets

Scientists intend to apply genomic insights to conservation efforts aimed at protecting these species. Genetic differences may also influence resilience to avian influenza, a topic requiring further investigation. The samples analyzed cover nearly the entire geographic range of gentoo penguins, underscoring the significance of this research for regional biodiversity.

The identification of a new gentoo penguin species carries profound implications for understanding evolutionary processes and biodiversity in the region. It also emphasizes the urgent need to safeguard natural habitats amid accelerating global climate change.

Leveraging genomic data within conservation programs could prove essential for ensuring the survival of these penguins and for developing adaptive management strategies in response to shifting ecosystems.