Report: TR 2007/24
Author: Brian J. Smith (NIWA)
The high productivity of the Mokau River and three of its tributaries along a 2.5 km reach was reflected in the very large numbers of adult EPT collected and a high diversity of species.
Nearly 60 species comprising nearly 40,000 individuals were caught using a combination of UV light traps and Malaise nets.
The tributaries contributed 95% of all species recorded, with one site having 81% of all species present. 43% of all species were only collected within the tributaries.
The main river sites yielded 65%, and the tributaries 92% of the total species caught by light trap alone.
No species of special conservation significance were recorded, however the ecological range was extended for four species. Specimens of a caddisfly potentially new to science were caught along the Mokau River and its lower tributary.
Adult Aquatic Insect Fauna of the Mokau River
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|3.||Results and discussion||4|
|3.1||Abundance and composition||4|
|3.4||Biodiversity and conservation significance||6|