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Herring population loses migration 'memory' after heavy fishing
Selective fishing of older herring has resulted in a large shift in the migration pattern of these fish, according to new research. For years, herring have visited sites on the south coast of Norway to spawn, but in 2020 a rapid shift was seen, with the fish instead visiting areas hundreds of kilometres to the north. Researchers have concluded that too many older fish have been removed from these waters, preventing the knowledge of the best spawning grounds being passed to younger, less experienced fish. This finding shows how human activity can affect animal migration, which could have serious consequences for the delicately balanced ecosystems built around them.
Research article: Slotte et al.
Archaeologists have identified tools that the ancient Maya may have used for tattooing, and the self-assembling stable structures that may help ‘forever chemicals’ persist in nature.
Research Highlight: Tattoo-making tools used by ancient Maya revealed
Research Highlight: ‘Forever’ molecules bunch themselves into cell-like structures
AI companions — apps where humans build relationships with computers — are hugely popular, with millions of people around the world using them. But despite increased social and political attention, research investigating how these systems can affect users has been lacking. We find out about the latest research in this space.
News Feature: Supportive? Addictive? Abusive? How AI companions affect our mental health
A technique that lets researchers directly edits proteins within living cells, and how a fibre-rich, low-fat diet could help replenish populations of gut microbes ravaged by antibiotics.
Nature: Powerful protein editors offer new ways of probing living cells
Nature: How to fix a gut microbiome ravaged by antibiotics
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