Cod Almighty! Atlantic Cod may be Five Species

Cod fishes floating in aquarium, Alesund, Norway.

“Researchers have conducted a genetic analysis of more than 6,000 Atlantic cod from different regions of the ocean, using DNA markers. They found that the cod clustered into five distinct groups, based on their geographic origin and migration patterns. These groups showed little or no evidence of interbreeding, suggesting they are reproductively isolated and may represent different species. This finding has implications for the conservation and management of Atlantic cod, as each group may have different ecological and evolutionary traits.

BioRxiv DOI: 10.1101/2023.06.14.544921

Birds of a Feather Learn Together

“Researchers have found that superb fairy-wrens can learn to associate unfamiliar sounds with danger through social learning. The birds were played a computer-generated “buzz” as part of a chorus of alarm calls from other bird species. By the end of the training period, 80% of the birds flew away and hid if they heard the computer buzz on its own. The study is the first to show the specific mechanism of social learning through acoustic-acoustic association.

Current Biology DOI: 10.1016/j.cub.2018.06.013

Species Mixing Made Easy: the Role of Virus-like Transposons

Credit Image: @RobynsWeb

“Scientists have identified a vector of horizontal gene transfer (HGT) in worms, which could lead to the discovery of further vectors of HGT in eukaryotes. HGT is a major evolutionary force within microbial communities and allows for the acquisition of novel traits that are unique…”

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Australia Leads the Way in Psychedelic-Assisted Therapy

Credit Image:@RobynsWeb & DALL-E

“Australia has become the first country to legalise the use of psychedelics to treat some mental health conditions. From July, 2023, psychiatrists can prescribe MDMA (ecstasy) for PTSD and psilocybin (magic mushrooms) for treatment-resistant depression. …”

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Earliest Strands of the Cosmic Web

Credit Image: @RobynsWeb & DALL-E

“Galaxies are not scattered randomly across the universe. They gather together not only into clusters, but into vast interconnected filamentary structures with gigantic barren voids in between. This ‘cosmic web’ started out tenuous and became more distinct over time as gravity drew matter together…”

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