Title:

Accuracy of the mapping technique for a dense breeding population of the hawfinch Coccothraustes coccothraustes in a deciduous forest

Subtitle:

Acta Ornithologica, vol. 39, no. 1 ; Test na dokładność metody kartograficznej w odniesieniu do populacji grubodziobów gniazdujących w wysokich zagęszczeniach w lesie liściastym (Białowieski Park Narodowy) ; Mapping technique accuracy for hawfinch

Creator:

Tomiałojć, Ludwik (1939– ) ; Polska Akademia Nauk. Muzeum i Instytut Zoologii

Contributor:

Museum and Institute of Zoology, Polish Academy of Sciences

Publisher:

Museum & Institute of Zoology

Place of publishing:

Warszawa

Date issued/created:

2004

Description:

Bibliogr. p. 73 ; P. [67]-74 : ill. ; 27 cm ; Abstract. pol.

Type of object:

Journal/Article

Subject and Keywords:

Grubodziób -- Polska Białowieski Park Narodowy [KABA]

Abstract:

The accuracy of the territory-mapping technique for estimating the abundance of densely breeding Hawfinches was tested in an old and unfragmented lime-oak-hornbeam forest in the Białowieża National Park, E Poland. Hawfinch numbers estimated from counts of the whole bird community carried out with the application of the standards of the improved mapping technique were compared with seven-year data on the bird’s true numbers, which are known from parallel intensive nest searches and persistent tracking of the movements of pairs. In a forest with a dense population of Hawfinches the mapping technique underestimated their numbers by 20% in years of moderate density and by 35% during high-density years. Even though the underestimation was negatively correlated with the true density of Hawfinches, the figures obtained by both methods reflected year-to-year changes in a similar way. An improvement in mapping data is achievable either by closer attention being paid to the species during standard visits (the best ones for surveying it), or post factum by the introduction of a correction factor into the mapping-technique figures.

Relation:

Acta Ornithologica

Volume:

39

Issue:

1

Start page:

67

End page:

74

Resource type:

Text

Detailed Resource Type:

Journal

Format:

text/xml

Source:

MiIZ PAN, call no. patrz sygn. czas. P.257-39-1 ; MiIZ PAN, call no. patrz sygn. czas. P.4568-39-1 ; click here to follow the link

Language:

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

Access:

Open