The breeding population of the Great Grey Shrike
Abstract: Since the 1980s, the breeding range of the Great Grey Shrike in Austria has been restricted to the northern part of Lower Austria. Since 1995, this breeding population has been fully censused to obtain base-line population levels. Every breeding locality was examined 6-8 times each season....
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.567.7521 2023-05-15T17:06:34+02:00 The breeding population of the Great Grey Shrike Leopold Sachslehner Alois Schmalzer Remo Probst The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.7521 http://www.biollett.amu.edu.pl/biollett_41_2_10.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.7521 http://www.biollett.amu.edu.pl/biollett_41_2_10.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.biollett.amu.edu.pl/biollett_41_2_10.pdf Key words Great Grey Shrike Lanius excubitor breeding distribution population dynamics habitat breeding success Lower Austria text 2003 ftciteseerx 2016-01-08T12:20:39Z Abstract: Since the 1980s, the breeding range of the Great Grey Shrike in Austria has been restricted to the northern part of Lower Austria. Since 1995, this breeding population has been fully censused to obtain base-line population levels. Every breeding locality was examined 6-8 times each season. In 1995 at least 38 occupied territories were found and 32 breeding pairs confirmed. In 1997, after the two harshest winters in the study period, only 18 occupied territories and 9 breeding pairs were confirmed. But since 1998, the breeding population has increased again. In 2002, the population reached a maximum of 50 occupied territories with 47 confirmed breeding pairs. In 2003, 46 pairs bred. The nests were built in deciduous trees at lower elevations of the Weinviertel and in coniferous trees at higher elevations. Most nest trees are in small woodlots or in forest edges. In 19982003, the portion of successful breeding pairs ranged from 57 % in 2003 (n = 46) to 80 % in 2001 (n = 40). On average, 3.4 (SD = 1.1, n = 129) fledglings per successful brood were recorded. Text Lanius excubitor Unknown |
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English |
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Key words Great Grey Shrike Lanius excubitor breeding distribution population dynamics habitat breeding success Lower Austria |
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Key words Great Grey Shrike Lanius excubitor breeding distribution population dynamics habitat breeding success Lower Austria Leopold Sachslehner Alois Schmalzer Remo Probst The breeding population of the Great Grey Shrike |
topic_facet |
Key words Great Grey Shrike Lanius excubitor breeding distribution population dynamics habitat breeding success Lower Austria |
description |
Abstract: Since the 1980s, the breeding range of the Great Grey Shrike in Austria has been restricted to the northern part of Lower Austria. Since 1995, this breeding population has been fully censused to obtain base-line population levels. Every breeding locality was examined 6-8 times each season. In 1995 at least 38 occupied territories were found and 32 breeding pairs confirmed. In 1997, after the two harshest winters in the study period, only 18 occupied territories and 9 breeding pairs were confirmed. But since 1998, the breeding population has increased again. In 2002, the population reached a maximum of 50 occupied territories with 47 confirmed breeding pairs. In 2003, 46 pairs bred. The nests were built in deciduous trees at lower elevations of the Weinviertel and in coniferous trees at higher elevations. Most nest trees are in small woodlots or in forest edges. In 19982003, the portion of successful breeding pairs ranged from 57 % in 2003 (n = 46) to 80 % in 2001 (n = 40). On average, 3.4 (SD = 1.1, n = 129) fledglings per successful brood were recorded. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Leopold Sachslehner Alois Schmalzer Remo Probst |
author_facet |
Leopold Sachslehner Alois Schmalzer Remo Probst |
author_sort |
Leopold Sachslehner |
title |
The breeding population of the Great Grey Shrike |
title_short |
The breeding population of the Great Grey Shrike |
title_full |
The breeding population of the Great Grey Shrike |
title_fullStr |
The breeding population of the Great Grey Shrike |
title_full_unstemmed |
The breeding population of the Great Grey Shrike |
title_sort |
breeding population of the great grey shrike |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.7521 http://www.biollett.amu.edu.pl/biollett_41_2_10.pdf |
genre |
Lanius excubitor |
genre_facet |
Lanius excubitor |
op_source |
http://www.biollett.amu.edu.pl/biollett_41_2_10.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.7521 http://www.biollett.amu.edu.pl/biollett_41_2_10.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766061726336286720 |