Tuesday, October 22, 2019

The effect of jetboat wake on braided riverbed birds on the Dart River

TitleThe effect of jetboat wake on braided riverbed birds on the Dart River
Publication TypeJournal Article
Year of Publication2001
AuthorsMcKinlay, B, Smale, A
JournalNotornis
Volume48
Issue2
Pagination72-75
Type of Articlepaper
Keywordsbraided riverbed birds, Dart River, jetboats, Otago
Abstract

We investigated the effect of jetboat wakes on feeding wrybill (Anarhynchusjontalis), banded dotterel (Charadrius bicinctus), black-billed gull (Lams bulleri), and black-fronted tern (Sterna albostriata) on the Dart River, Otago. We found that all species feed in areas likely to be affected by jetboat wake. On average, banded dotterel (n=8) were 43.2 mm above the water level and 4.37 m from the waters edge, wrybill (n= 16) were 49 mm above the water level and 0.8 m from the water's edge. Jetboat wake (n=7) extended 91.3 mm above the waters edge and on average 1 m from the edge of the river channel. The implications of the wash and the extent of the likely effect are discussed.

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