theatlantic.com

Two Arctic Fish Are Breaking the Rules of Genetics

To survive in the frigid ocean waters around the Arctic and Antarctica, marine life evolved many defenses against the lethal cold. One common adaptation is the ability to make antifreezing proteins (AFPs) that prevent ice crystals from growing in blood, tissues, and cells.

09-Jun-2021 — The discovery of a gene shared by two unrelated species of fish is the latest evidence ... To survive in the frigid ocean waters around the Arctic and Antarctica, marine life evolved many defenses against the lethal cold. One common adaptation is the ability to make antifreezing proteins (AFPs) that prevent ...
‘No. We don’t believe you,’” she said.

Samuel Velasco/Quanta Magazine

The disbelief in their findings was understandable

Graham thinks that these sequences are “definitive proof” that a small chunk of a herring chromosome made its way into a smelt’s. “If anybody wants to dispute this,” she said, “you know, I don’t see how they possibly could.”

Samuel Velasco/Quanta Magazine; source: Laurie Graham

Cédric Feschotte, a genome biologist at Cornell University who was not involved in the study, agrees. “It seems unmistakable when you look at the data,” he said. What really intrigues him, though, is how well this finding lines up with work that he and others are doing on transposable elements and the rise of new genes.


Origins: Antarctica: Ideas: Antifreeze Fish (1) | Exploratorium

https://www.exploratorium.edu › origins › ideas › fish
Meet the Notothenioids, a group of more than 120 marine fish species, most of ... Antarctic Notothenioids have remarkable proteins in their bloodstream that prevent them ... These "antifreeze proteins", as they are commonly known, bind to tiny ice ... To survive the frigid waters of the Arctic Ocean, the Arctic cod—a genetically ...
by C Berthelot2019Cited by 9 — The evolution of antifreeze glycoproteins has enabled notothenioid fish to ... many of which have evolved novel adaptations to life in freezing ... Rapid climate change is affecting oceans in both polar regions, more specifically the Arctic and ... 2015) effectively isolated the marine fauna around Antarctica.

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