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  Services » Publications » Technical reports - by year » tr200724

Adult Aquatic Insect Fauna of the Mokau River


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
(816 kb, 116 seconds to download, 56k modem)

Table of 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
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