Issue 27, 2008

Epic Antarctic voyage complete: analysis begins

Applying the science: didymo

Major port biosecurity surveillance underway

What risk from alien fish?

What risk from alien fish?

Koi carp – a high-risk alien species. (Photo: NIWA)

The risk posed by alien fish to our freshwater species and habitats can now be evaluated using a model developed by NIWA scientists. The Freshwater Fish Risk Assessment Model (FRAM) assesses the risk of new alien fish species becoming established in New Zealand, and, importantly, their capacity to damage the environment, giving an overall ‘ecological risk’.
FRAM is powerful and simple to use.

Epic Antarctic voyage complete: analysis begins

Part of a sea lily ‘meadow’ at 550 m on the Admiralty. (Photo: DTIS, IPY-CAML)

Tangaroa and 44 intrepid voyagers successfully completed the most comprehensive survey of marine life ever undertaken in the Ross Sea region. They returned to Wellington on 20 March after an epic 50-day, 7140 nautical mile voyage, bearing more than 37 000 biological specimens, and images of seafloor communities never seen before.
The focus of the voyage was to survey biodiversity to provide a fuller picture of the Ross Sea ecosystem and what makes it tick.

Applying the science: didymo

Didymo predictive maps, quantifying the potential threat from didymo to any river reach in New Zealand, are now in use, thanks to work by NIWA scientists. Potential percentage didymo cover and mat thickness can be mapped, based on models combining what is known about didymo biology with specific river and climate features.

Research subject: AlgaeAntarcticaBiosecurityFish