Glass eels (about 5.5 to 7.0 cm) arrive in fresh water during spring, especially during September and October, although they may be present from July to December.

This weekly update helps assess likelihood of extremely dry weather preceding a drought.

New Zealand rushes (Juncus): species-level factsheets.

How healthy is your stream? SHMAK - the New Zealand Stream Health Monitoring and Assessment Kit - has been designed to help you find out.

One of the most common species of freshwater fish in Aotearoa is the common bully or toitoi.

What are the impacts of water dams on water quality and mahinga kai?

Hull-mounted on the RV Tangaroa, the EM302 multibeam echosounder maps the seafloor using a fan of 288 acoustic beams, producing up to 864 soundings per ping in dual swath mode, providing 100% coverage of the seabed.

What are the sources of chemical contamination from wood processing?

A collection of ID guides to algae. Groups include major freshwater algal groups, diatoms and blue-green (cyanobacteria), red and green algae.

The topography of the North Island has a profound effect on the weather of the Bay of Plenty region.

Understanding climate and climate change.