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Effects of Vocal Behaviour on Abundance Estimates of Rainforest Galliforms

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Title: Effects of Vocal Behaviour on Abundance Estimates of Rainforest Galliforms

Creator:

Nijman, Vincent

Date issued/created:

2007

Resource Type:

Journal

Subtitle:

Aktywność głosowa a szacowanie liczebności tropikalnych kuraków ; Short notes

Contributor:

Museum and Institute of Zoology, Polish Academy of Sciences

Publisher:

Museum and Institute of Zoology, Polish Academy of Sciences ; Natura Optima Dux Foundation

Place of publishing:

Warsaw

Description:

pg(s) 186–190

Abstract:

A comparative study was undertaken to assess the effects of the vocal activity of a target species on its density estimates made using line transect counts and point counts. In Kayan Mentarang National Park (Indonesian Borneo) the Great Argus Pheasant Argusianus argus displayed different levels of calling activity. The study was conducted at a period when the birds were highly vocal, and again, at the same site, when the birds were significantly less vocal. Transect counts during periods of low vocal activity resulted in 13–20% lower density estimates compared to periods of high vocal activity, but these differences were not significant. Estimates derived from five-minute point counts during periods of low vocal activity, however, were 52% lower than those from periods of high vocal activity. Comparison of the two methods shows that density estimates derived from the point count method were consistently lower than those from the line transects. The lack of a fixed calling season in Argus Pheasants makes year-round censuses possible, yet the distinct temporal differences in calling rates necessitates that caution be exercised when results obtained in different years or at different times of the year are compared. It is concluded that there is an increased need for understanding the behavioural plasticity of species if census methods are to be improved.

Relation:

Acta Ornithologica

Volume:

42

Issue:

2

Start page:

186

End page:

190

Format:

text/xml

Resource Identifier:

oai:rcin.org.pl:55658 ; 10.3161/068.042.0201

Source:

MiIZ PAN, call no. P.257 ; MiIZ PAN, call no. P.4568 ; click here to follow the link

Language:

eng

Language of abstract:

pol ; eng

Rights:

Rights Reserved - Free Access

Terms of use:

Copyright-protected material. May be used within the limits of statutory user freedoms

Digitizing institution:

Museum and Institute of Zoology of the Polish Academy of Sciences

Original in:

Library of the Museum and Institute of Zoology of the Polish Academy of Sciences

Projects co-financed by:

Subject and keywords:

Great Argus Pheasant Argusianus argus census methods Galliformes Indonesia line transects point counts research methods

Object collections:

Last modified:

Apr 1, 2016

In our library since:

Jul 30, 2015

Number of object content hits:

48

All available object's versions:

https://rcin.org.pl/publication/75731

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Show description in OAI-PMH format:

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Edition name Date
Short notes: Effects of Vocal Behaviour on Abundance Estimates of Rainforest Galliforms / Nijman, Vincent Apr 1, 2016

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Project II

Projekt „Otwarte Zasoby w Repozytorium Cyfrowe Instytutów Naukowych” [OZwRCIN] współfinansowany z Europejskiego FunduszuRozwoju Regionalnego w ramach ProgramuOperacyjnego Polska Cyfrowa, lata 2014-2020, Działanie 2.3 : Cyfrowa dostępność i użyteczność sektora publicznego oraz środki Partnerów

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