Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Jorma Sorjonen"'
Publikováno v:
Animal Behaviour. 91:111-118
Conspecific brood parasitism (CBP) is an alternative reproductive tactic in several animal taxa. Recently the role of kinship in CBP has been in focus, and some studies have demonstrated high host–parasite relatedness in avian CBP systems. However,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47dc97e40d5859fa2cde8ba1650a9be6
https://doi.org/10.1016/j.anbehav.2014.03.015
https://doi.org/10.1016/j.anbehav.2014.03.015
Publikováno v:
Animal Behaviour. 80:881-886
Conspecific brood parasitism (CBP) has been identified as an integral life history component in birds. Recent empirical and theoretical studies suggest that nest predation is an important ecological factor affecting the occurrence and evolution of CB
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d65cacc2c4332c206b1afc344f11c502
https://doi.org/10.1016/j.anbehav.2010.08.009
https://doi.org/10.1016/j.anbehav.2010.08.009
Publikováno v:
Ethology. 103:304-317
Blood parasites of breeding American kestrels, Falco sparverius (40 males and 27 females), were investigated to determine their connections to male showiness, mating success and host fitness. The only haematozoan found in the blood films was Haemopro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3e270c9c222d08d9c1d0ecb389ffae6
https://doi.org/10.1111/j.1439-0310.1997.tb00020.x
https://doi.org/10.1111/j.1439-0310.1997.tb00020.x
Publikováno v:
Journal of Avian Biology. 40:453-456
Eadie (1989) developed a method based on variation between females in egg length, width and weight to detect conspecific brood parasitism in the field: using these three egg measures, Euclidean distance between all pairs of eggs within a clutch is ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf3ca91d268d2708f77ffb875fc9ec7a
https://doi.org/10.1111/j.1600-048x.2008.04528.x
https://doi.org/10.1111/j.1600-048x.2008.04528.x
Publikováno v:
Marine Mammal Science. 12:611-618
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd59f13cc158326138b9d9eab5645393
https://doi.org/10.1111/j.1748-7692.1996.tb00076.x
https://doi.org/10.1111/j.1748-7692.1996.tb00076.x
Autor:
Jorma Sorjonen, Hannu Pöysä
Publikováno v:
Ecography. 23:342-348
Breeding population of the whooper swan Cygnus cygnus has increased dramatically in Finland during the last 50 yr, from ca 15 to 1500 pairs. We studied if the recent recolonization by the whooper swan into waterfowl communities in Finland has had neg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ccb6d4b6efdc382aebbe96acee106f3
https://doi.org/10.1034/j.1600-0587.2000.d01-1643.x
https://doi.org/10.1034/j.1600-0587.2000.d01-1643.x
Autor:
Jorma Sorjonen
Publikováno v:
Behaviour. 98:286-304
In this study the effects of bird size, genus, habitat, song community and geographical distribution on song structure and singing behaviour of some passcrine species in northern Europe were simultaneously studied. Most species tend to improve their
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::481c3f42d4aef75e3055a6729a54f702
https://doi.org/10.1163/156853986x01017
https://doi.org/10.1163/156853986x01017
Autor:
Jorma Sorjonen
Publikováno v:
Behaviour. 98:274-285
The structure of song and song propagation of studied populations of the Finnish thrush nightingale, the Mediterranean nightingale and the bluethroat (L. svecica) are in accordance with the prediction that birds living in less open habitat and usuall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c8ab4fab6e14a120e9028a561338634
https://doi.org/10.1163/156853986x01008
https://doi.org/10.1163/156853986x01008
Autor:
Jorma Sorjonen
Publikováno v:
Behaviour. 102:196-211
Differences in the song repertoires of males and in the song-pools of the thrush nightingale populations were studied in 1972, 1983 and 1984 in southern Finland. Changes in male repertoires and in the song-pool of one population were monitored in 197
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3a166d971e8978de5cee4ffcf82fe1b
https://doi.org/10.1163/156853986x00126
https://doi.org/10.1163/156853986x00126
Autor:
Jorma Sorjonen
Publikováno v:
Ornis Scandinavica. 11:125
Certain factors which appear to be decisive in habitat selection by breeding Thrush Nightingales are set out. This species favours deciduous coppices which are usually low and shady. Some dense thickets providing good shelter are always present in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9835b9628d4adc5943d67b30788019e8
https://doi.org/10.2307/3675919
https://doi.org/10.2307/3675919