Protocols for the inventory and monitoring of populations of thr ...

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The protocols represent current 'best practice', but further ...... Boulton, R.L.; Clarke, M.F. 2003: Assessing programs for monitoring threatened species—a tale.
Protocols for the inventory and monitoring of populations of the endangered Australasian bittern (Botaurus poiciloptilus) in New Zealand

DOC Technical Series 38

Colin F.J. O’Donnell and Emma M. Williams

Department of Conservation Technical Series presents instructional guide books and data sets, aimed at the conservation officer in the field. Publications in this series are reviewed to ensure they represent standards of curent best practice in the subject area. This report is available from the departmental website in pdf form. Titles are listed in our catalogue on the website, refer www.doc.govt.nz under Publications, then Science & technical. © Copyright March 2015, New Zealand Department of Conservation ISSN ISBN

1178–1009 (web PDF) 978–0–478–15035–3 (web PDF)

This report was prepared for publication by the Publishing Team; editing by Amanda Todd and layout by Lynette Clelland. Publication was approved by the Deputy Director-General, Science and Capability Group, Department of Conservation, Wellington, New Zealand. Published by Publishing Team, Department of Conservation, PO Box 10420, The Terrace, Wellington 6143, New Zealand. In the interest of forest conservation, we support paperless electronic publishing.

Contents Abstract

1

1. Introduction

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2.

Definitions of inventory and monitoring

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3.

Why survey or monitor Australasian bittern populations?

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4.

Inventory and monitoring options for Australasian bitterns

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4.1

Development of the call count method

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4.2

Assumptions of the call count method

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5.

Protocols for inventory and monitoring of Australasian bitterns

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5.1

Presence/absence during call inventories (inventory only)

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5.2

Estimate (index) of the number of booming males using close approaches in small wetlands (

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