Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Jan Sondell"'
Autor:
Frédéric Jiguet, Malcolm Burgess, Kasper Thorup, Greg Conway, José Luis Arroyo Matos, Lee Barber, John Black, Niall Burton, Joan Castelló, Gary Clewley, José Luis Copete, Michel Alexandre Czajkowski, Svein Dale, Tony Davis, Valery Dombrovski, Mike Drew, Jaanus Elts, Vicky Gilson, Emilienne Grzegorczyk, Ian Henderson, Michael Holdsworth, Rob Husbands, Romain Lorrilliere, Riho Marja, Simonas Minkevicius, Caroline Moussy, Peter Olsson, Alejandro Onrubia, Marc Pérez, Joseph Piacentini, Markus Piha, Jean-Marc Pons, Petr Procházka, Marko Raković, Harriet Robins, Tuomas Seimola, Gunnar Selstam, Michał Skierczyński, Jan Sondell, Jean-Claude Thibault, Anders P. Tøttrup, Justin Walker, Chris Hewson
Publikováno v:
Scientific Reports, Vol 9, Iss 1, Pp 1-12 (2019)
Abstract Each year, billions of songbirds cross large ecological barriers during their migration. Understanding how they perform this incredible task is crucial to predict how global change may threaten the safety of such journeys. Earlier studies ba
Externí odkaz:
https://doaj.org/article/6fe9e535b6894108ad3326b867edea6b
Publikováno v:
Ornis Svecica. 29
Ortolan Buntings Emberiza hortulana are rapidly decreasing in Sweden. Changes in agricultural practices are the main reason. Landscape simplification due to the removal of semi-natural elements leads to a lack of breeding habitats. Furthermore, due t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e7c8a4155e05dfadcd3feeec4c1bd00
https://doi.org/10.34080/os.v29.19554
https://doi.org/10.34080/os.v29.19554
Publikováno v:
Ornis Svecica. 26:104-120
In 2015 we studied the relative importance of silage and cereal crops as breeding habitat for the skylark Alauda arvensis. In 2014 we had found that skylarks failed to breed successfully in grass silage fields. We compared skylark density between cro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63bcd5b641a801f6513100a86f5657f9
https://doi.org/10.34080/os.v26.22526
https://doi.org/10.34080/os.v26.22526
Autor:
Magnus Persson, Jan Sondell
Publikováno v:
Ornis Svecica. 28
During field work on foraging of the Ortolan Bunting Emberiza hortulana in a small and isolated population at Kvismaren in the county of Örebro in south Sweden, two females, nesting 1,250 m apart were observed to be mate-guarded by the same colour-r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa631303c0b94ccacf073e788fa8a0eb
https://doi.org/10.34080/os.v28.19533
https://doi.org/10.34080/os.v28.19533
Publikováno v:
Ornis Svecica. 25:3-14
The decrease of Ortolan Bunting Emberiza hortulana in Western Europe over the last five decades has caused serious concern for the survival of this species in Sweden. In order to find out the migration routes and wintering location, we equipped sever
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd4a0774a287babac72847b47b758ba9
https://doi.org/10.34080/os.v25.19599
https://doi.org/10.34080/os.v25.19599
Autor:
Jan Sondell
Publikováno v:
Ornis Svecica. 27
The skylark Alauda arvensis population has declined in Sweden. The breeding in silage fields fails and the success in autumn crops is disputed. Therefore, I decided to study the skylark utilisation of autumn crop fields in Kvismaren, central Sweden
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::274e154cc20e9f3d6ebde0d27f653210
https://doi.org/10.34080/os.v27.19556
https://doi.org/10.34080/os.v27.19556
Publikováno v:
Ornis Svecica. 21:167-178
The only remaining Ortolan Buntings in the province of Närke are about 15 singing males in the Kvismaren valley. We studied this small population intensively during May–June, 2011. We found that the birds depend on bare soil of two kinds: potato f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d1b7aa4ea71d669842c9bb1cf456aaa
https://doi.org/10.34080/os.v21.19600
https://doi.org/10.34080/os.v21.19600
Autor:
Jan Sondell
Publikováno v:
Ornis Svecica. 10:13-24
I have analysed 1,777 moult records of the Reed Buntings Emberiza schoeniclus, collected at Kvismaren, central Sweden, in 1973–1995. When evaluating moult with regression techniques it is important that the data are representative primarily with re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b52f76935fa844b327d404a8f43c6310
https://doi.org/10.34080/os.v10.22884
https://doi.org/10.34080/os.v10.22884
Autor:
Tjelvar Odsjö, Jan Sondell
Publikováno v:
The Science of the total environment.
In the middle of the 1960s low reproductive rate was found in several osprey (Pandion haliaetus) nests in Sweden. Therefore a project was started to investigate the production and to collect unhatched eggs and shell fragments in different regions of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78f15e21d03767237049e6b4a9d5d79f
https://pubmed.ncbi.nlm.nih.gov/24239823
https://pubmed.ncbi.nlm.nih.gov/24239823
Autor:
Jan Sondell
Publikováno v:
Ornis Svecica. 3:107-116
The wing moult of the White Wagtail Motacilla a. alba and the Yellow Wagtail M. f .flava has been recorded since 1973 at Kvismaren, central Sweden. Based on data from 558 White and 78 Yellow Wagtails in active moult the wing moult duration of the for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41525070773db7625b01aad723b11f28
https://doi.org/10.34080/os.v3.23035
https://doi.org/10.34080/os.v3.23035