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Krill

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Zavodovski Island’s Chinstrap Penguin Population Plummets 63%, Losing Global Title
environment11 days ago

Zavodovski Island’s Chinstrap Penguin Population Plummets 63%, Losing Global Title

The world’s largest penguin colony on Zavodovski Island has lost two-thirds of its chinstrap penguin population since 2011, with numbers dropping from over a million to approximately 400,000. Published in Current Biology, the study attributes this rapid decline to climate change, which is warming oceans and displacing krill, the penguins' primary food source. While macaroni penguins on the same island have increased by 28%, the loss of chinstraps threatens the local ecosystem balance and may lead to the species being classified as endangered.

via The Independent|
#british-antarctic-survey#chinstrap-penguins#climate-change
Antarctic penguins switch diet from fish to krill as sea ice vanishes, study finds
science3 months ago

Antarctic penguins switch diet from fish to krill as sea ice vanishes, study finds

Using 30 years of satellite data plus color analysis of penguin guano, researchers show Adélie penguin diets track sea-ice conditions: more fish when ice is plentiful, more krill when ice is scarce. Penguins that rely more on krill are in decline, highlighting climate-driven shifts in the Antarctic food web and increasing competition for krill amid fisheries.

via BBC Wildlife Magazine|
#adelie-penguin#antarctic-ecosystem#climate-change
Penguin foraging reveals prey become harder to reach under Antarctic sea ice
science3 months ago

Penguin foraging reveals prey become harder to reach under Antarctic sea ice

Tracking 23 Adélie penguins across 6,000+ dives beneath Antarctic sea ice shows prey can become much harder to reach even when abundant: krill shift deeper or farther in response to repeated hunting, keeping feeding rates steady but forcing penguins to work harder to find food. The study highlights prey accessibility as a key driver of predator foraging, with implications for climate change and krill fisheries.

via The Times of India|
#antarctica#krill#penguins
Humpback Whale's Record 8,000-Mile Migration Puzzles Scientists
environment1 year ago

Humpback Whale's Record 8,000-Mile Migration Puzzles Scientists

A male humpback whale has set a record for the longest migration ever recorded for the species, traveling over 8,000 miles from Colombia to Zanzibar. This extraordinary journey highlights the impact of climate change on marine life, as rising ocean temperatures disrupt krill populations, a primary food source for humpback whales. Scientists suggest that the whale's migration may be a response to food scarcity, changes in breeding habitats, and increased competition among males, reflecting broader shifts in marine ecosystems due to global warming.

via The Daily Galaxy --Great Discoveries Channel|
#climatechange#environment#humpbackwhale
Lessons from Adapting Penguins: Protecting Antarctic Colonies from Bird Flu.
environment3 years ago

Lessons from Adapting Penguins: Protecting Antarctic Colonies from Bird Flu.

As global warming changes the survival-of-the-fittest game in Antarctica, one particular species of penguin, the gentoo, is modeling a poignant lesson for humanity: adapt or die. While Adélie and chinstrap penguins remain stuck in their ancient ways, the much more flexible gentoo penguins are ranging further and further south. As they show willingness to chase new prey or abandon a nest to increase the odds of long-term survival, their numbers are exploding. The gentoos are an example of what humans in the world of terrifying UN climate reports call the “hard” and “soft” limits of adaptation.

via CNN|
#adaptation#antarctica#climate-change