Abstract

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 [PDF, 797 KB]

Contents
	Executive Summary	iv
1.	Introduction	1
2.	Methods	2
3.	Results and discussion	4
3.1	Abundance and composition	4
3.2	Temporal patterns	4
3.3	Spatial patterns	5
3.4	Biodiversity and conservation significance	6
4.	Summary	8
5.	References	9
6.	Appendices	10