Tag #Seals

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bbc.com

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Mar 20, 22:10

Seals' Super Sense: Cognitive Oxygen Perception Enables Extended Dives

Dr. Chris McKnight from Northern Ireland discovered that seals possess a unique cognitive ability to perceive blood oxygen levels, enabling them to precisely control their dives and avoid drowning, a key adaptation in their evolution as marine mammals.

Seals' Super Sense: Cognitive Oxygen Perception Enables Extended Dives

Dr. Chris McKnight from Northern Ireland discovered that seals possess a unique cognitive ability to perceive blood oxygen levels, enabling them to precisely control their dives and avoid drowning, a key adaptation in their evolution as marine mammals.

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Life Below Water

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What is the key physiological mechanism enabling seals to extend their underwater dives significantly?

A Northern Irish scientist, Dr. Chris McKnight, discovered that seals possess a unique cognitive ability to sense blood oxygen levels, enabling them to regulate their dives and avoid drowning. This super sense is crucial to their underwater survival and evolutionary success as marine mammals.

theglobeandmail.com

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Jan 24, 01:09

Massive Iceberg Threatens Antarctic Wildlife

A trillion-ton iceberg, A23a, is moving towards South Georgia Island, potentially disrupting penguin and seal breeding by blocking access to food sources and increasing chick mortality rates, an event amplified by human-caused climate change.

Massive Iceberg Threatens Antarctic Wildlife

A trillion-ton iceberg, A23a, is moving towards South Georgia Island, potentially disrupting penguin and seal breeding by blocking access to food sources and increasing chick mortality rates, an event amplified by human-caused climate change.

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What are the immediate impacts of the massive iceberg A23a on wildlife near South Georgia Island?

A colossal iceberg, A23a, is drifting toward South Georgia Island, potentially disrupting penguin and seal breeding. Its size (Rhode Island-sized) and slow movement (one meter every three to seven seconds) have raised concerns about foraging difficulties for penguin parents, potentially increasing chick mortality.

bbc.com

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Feb 20, 01:11

Bird Flu Outbreak in Norfolk: Seals Test Positive, 1.8 Million Birds Culled

Two dead grey seals in Norfolk tested positive for bird flu, alongside wild birds, resulting in almost 1.8 million birds being culled across England since November 5th due to 36 outbreaks, while the risk to humans remains low.

Bird Flu Outbreak in Norfolk: Seals Test Positive, 1.8 Million Birds Culled

Two dead grey seals in Norfolk tested positive for bird flu, alongside wild birds, resulting in almost 1.8 million birds being culled across England since November 5th due to 36 outbreaks, while the risk to humans remains low.

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What are the underlying causes contributing to the spread of bird flu, and what is the broader ecological impact beyond the immediate culling measures?

The discovery of bird flu in seals links the avian outbreak to other mammals, despite the APHA stating that the risk to non-avian wildlife is not increased. This follows infections in foxes, otters, and dolphins in 2023, though none were reported last year. The current outbreak underscores the wide-ranging impact of avian flu and its potential for cross-species transmission.

zeit.de

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Nov 8, 19:10

Mass Harbor Seal Deaths in Germany

An investigation is underway in Germany into the deaths of 44 harbor seals found near Rügen island, with suspicion falling on fishing nets.

Mass Harbor Seal Deaths in Germany

An investigation is underway in Germany into the deaths of 44 harbor seals found near Rügen island, with suspicion falling on fishing nets.

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Were any diseases ruled out as causes?

While several viruses were tested for, none were found to be responsible for the deaths. The main line of investigation points to the possibility of the seals drowning in fishing nets due to the discovery of undigested fish in their stomachs.

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