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By Stephen Luntz

Brief bites of science news.

The full text of this article can be purchased from Informit.

3D Printing Tags Fish

CSIRO’s state-of-the-art 3D printing facilities are being used to manufacture titanium tags for big fish such as sharks, marlin and tuna.

“Using our Arcam 3D printing machine, we’ve been able to redesign and make a series of modified tags within a week,” said Mr John Barnes of CSIRO Titanium Technologies. “When our marine science colleagues asked us to help build a better fish tag, we were able to send them new prototypes before their next trip to sea.”

Titanium’s strength, resistance to salt water and biocompatibility make it ideal for tagging marine animals, aside from the difficulties of working the tough metal.

3D printing has revolutionised the ways in which titanium objects can be manufactured.

“Our early trials showed that the textured surface worked well in improving retention of the tag, but we need to fine-tune the design of the tag tip to make sure that it pierces the fish skin as easily as possible,” said Barnes.

Antarctic Fish Adapt to Warming

Antarctic fish are able to adapt to warming oceans, a study at the University of Canterbury has found. However, it remains to be seen whether they will be able to cope with the influx of new species that warmer waters will bring.

The oceans around the Antarctic Peninsula have warmed by 1°C in recent years, leading to an influx of crabs that...

The full text of this article can be purchased from Informit.