"Vištvanagio (Accipiter gentilis Linnaeus, 1758) perėjimo buveinių pasirinkimo ypatumai Lietuvos miškuose"
The Features of Goshawk (Accipiter gentilis Linnaeus, 1758) Breeding Habitat Selection in Lithuanian Forests. Northern Gawshawk (Accipiter gentilis L.) is widespread in Holarctic, however, as a rare and endangered species, is protected in a number of countries. Typical bird of mature, large forests....
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Master Thesis |
| Language: | Lithuanian English |
| Published: |
Institutional Repository of Vilnius University
2016
|
| Subjects: | |
| Online Access: | http://vu.lvb.lt/VU:ELABAETD35652398&prefLang=en_US |
| Summary: | The Features of Goshawk (Accipiter gentilis Linnaeus, 1758) Breeding Habitat Selection in Lithuanian Forests. Northern Gawshawk (Accipiter gentilis L.) is widespread in Holarctic, however, as a rare and endangered species, is protected in a number of countries. Typical bird of mature, large forests. One of the best examined raptor species, however there is a lack of data on macrohabitat selection in North-eastern and Eastern Europe. In order to determine breeding habitat selection of the species, a survey of microhabitat and macrohabitat of Northern Gawshawk was carried out in the North-eastern part of Lithuania in 2015, with 34 nests described. Trying to determine preferences and avoidances of Northern Gawshawk, the charateristics of breeding microhabitats (3ha) and macrohabitats (907 ha) were compared with 34 random points. The characteristics of found nests (n = 34) were described in details. It was found that the majority of nests (46,72 ± 8,53 %) were predominantly built in dominant pine forests (44,87 ± 8,47 %), on the second third of the trunk (80,50 ± 10,36 %), on the side branches near the stem (62,52 ± 10,04 %), at the hight of 16,21 ± 3,44 m, with the canopy cover 70,44 ± 7,42 % in Western taiga type forests (79,4 %). The nest, oriented to the southern (SE, S, SW) directions, was mostly built in one of the tallest, thickest and oldest trees in the microhabitat. At the microhabitat level pine forests were the priority (p < 0,05), and birch,or white alder forests were avoided. At macrohabitat level the species preferred woodlands (p < 0,05), while open territories were avoided. In macrohabitat by stand type priority was given to coniferous forests (p < 0,05), especially spruce, while at macrohabitat level by age – to mature forests. The settlement of the nest was located at the average distance of 958,8 ± 426,0 m from the anthropogenic objects and forest edges, with the clear avoidance (p < 0,05) of homesteads and roads with artificial surfaces. First time in Lithuania, the fact of successful breeding in city park (Vilnius) was proven. |
|---|