Subtitle:

Acta Ornithologica, vol. 38, no. 2 ; Nocna dynamika przelotu wędrówkowego ptaków nad środkowym Izraelem - badania radarowe ; Night migration of birds in Israel

Contributor:

Polska Akademia Nauk. Muzeum i Instytut Zoologii

Publisher:

Museum & Institute of Zoology

Place of publishing:

Warszawa

Description:

Bibliogr. p. 109-110 ; P. [103]-110 : ill. ; 27 cm ; Abstract in Polish. Taxa in Latin

Type of object:

Journal/Article

Abstract:

The purpose of the research was to find a time frame for the beginning, duration of maximum intensity, and end of nocturnal bird migration. The research was carried out using photo registration on a radar screen during the spring and autumn seasons of 1999-2001. Examination of the average length of daylight at the beginning of migration and the onset of civil twilight yielded a high correlation factor for both spring and autumn. The results showed that, on average, nocturnal migration began at the onset of civil twilight, that is, half an hour after sunset. The time elapsing between the onset of migration and the maximum concentration of migratory birds averaged about 70 minutes in both spring and autumn. Nocturnal migration usually came to an end within the one and a half to two hours after sunrise. We ascertained the seasonal time shift for the onset of nocturnal migration corresponding to the seasonal time shift related to the approach of darkness. The average times of the beginning, maximum intensity and end of nocturnal migration were found to be related to photoperiodic factors.

Relation:

Acta Ornithologica

Volume:

38

Issue:

2

Start page:

103

End page:

110

Detailed Resource Type:

Article

Format:

application/pdf

Resource Identifier:

oai:rcin.org.pl:45699

Source:

MiIZ PAN, call no. P.257-38-2 ; MiIZ PAN, call no. P.4568-38-2 ; click here to follow the link

Language:

eng

Rights:

Rights Reserved - Restricted Access

Terms of use:

Copyright-protected material. Access only on terminals at the Museum and Institute of Zoology of the Polish Academy of Sciences, 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:

European Union. European Regional Development Fund ; Programme Innovative Economy, 2010-2014, Priority Axis 2. R&D infrastructure

Access:

Closed