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001-es BibID:	BIBFORM078434
Első szerző:	Fülöp Attila (biológus)
Cím:	Autumn Passage of Soaring Birds over Dobrogea (Romania): A Migration Corridor in Southeast Europe / Attila Fülöp, Szilárd J. Daróczi, Andreea S. Dehelean, Luca A. Dehelean, Zoltán Domahidi, Attila Dósa, Gertrúd Gyékény, Zsolt Hegyeli, Réka B. Kis, István S. Komáromi, István Kovács, Tamás Miholcsa, András A. Nagy, Attila Nagy, Szilárd Z. Ölvedi, Tamás Papp, Liviu G. Pârâu, Attila K. Sándor, Tibor Sos, Róbert Zeitz
Dátum:	2018
ISSN:	0373-2266
Megjegyzések:	The Dobrogea region in southeastern Romania, which is part of the EurasianEast African Flyway, is listed as one of the important migration corridors for soaring birds on the western coast of the Black Sea. However, our knowledge regarding migration intensity, phenology and geographical patterns of soaring birds over the area is poor. To determine the migration intensity and phenology of soaring birds, we recorded the autumn migration in the M¡acin Mountains (northern Dobrogea) from mid-August to the end of October between 2002-2007. To describe the geographical patterns of migration at a regional scale, we recorded migration intensity in the second half of September in 2010 and 2011, simultaneously from 15 and 13 counting points, respectively, covering the entire region of Dobrogea. In the Măcin Mountains we recorded a mean number (?SD) of 11,297 ? 2333.5 (CV = 20.7%) migrating raptors per year, and of 21,367 ? 10,949.3 (51.2%) and 455.6 ? 43.6 (9.6%) migrating White Storks Ciconia ciconia and Black Storks Ciconia nigra, respectively. Migration phenology parameters varied across raptor and non-raptor species. Migration occurred over a broad front, covering all of Dobrogea. However, migration intensity was more pronounced in the western, central and eastern parts of the region, and was less intensive in the northern central areas. Overall, we recorded 30 migrating raptor species and three non-raptor species. The most abundant raptors were Common Buzzard Buteo buteo, European Honey Buzzard Pernis apivorus, Lesser Spotted Eagle Clanga pomarina, Eurasian Sparrowhawk Accipiter nisus and Western Marsh Harrier Circus aeruginosus. The three non-raptor species were White Stork, Black Stork and Great White Pelican Pelecanus onocrotalus. Our study provides the first general overview of the autumn passage of soaring birds over Dobrogea, highlighting the importance of this area as part of a global migration network.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban raptors storks pelicans migration Măcin Mountains Dobrogea Eurasian-East African Flyway
Megjelenés:	Ardea. - 106 : 1 (2018), p. 61-77. -
További szerzők:	Daróczi Szilárd J. Dehelean, Andreea S. Dehelean, Luca A. Domahidi Zoltán Dosa Attila Gyékény Gertrúd Hegyeli Zsolt Kis Réka B. Komáromi István S. Kovács István Miholcsa Tamás Nagy András Attila Nagy Attila Olvedi Szilárd Z. Papp Tamás Pârâu Liviu G. Sándor Attila K. Sós Tibor Zeitz Róbert
Pályázati támogatás:	ÚNKP-16-3-IV Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM013320
Első szerző:	Pap Péter László (ökológus)
Cím:	Variation in haematological indices and immune function during the annual cycle in the Great Tit Parus major / Péter L. Pap, Csongor I. Vágási, Jácint Tökölyi, Gábor Á. Czirják, Zoltán Barta
Dátum:	2010
ISSN:	0373-2266
Megjegyzések:	We investigated seasonal variation in haematological indices and immune function in the non-migratory Great Tit Parus major over a complete annual cycle. The haematocrit value showed a marked reduction in spring and summer, reaching a lowest value during moult, after which it increased to reach a maximum in winter and spring. The peak in the heterophil to lymphocyte ratio (H/L) during July indicated that Great Tits were the most stressed during the first half of the moulting period. The increase in heterophils and H/L ratio, concurrent with a reduced number of lymphocytes during the breeding season, probably reflected the cost of reproduction in terms of physiological stress and immune suppression. After breeding the number of heterophils and the H/L ratio decreased, reaching a lowest value during winter. The concentration of immunoglobulins followed the seasonal pattern in the number of heterophils, though highest values occurred somewhat later, in July?September during the second part of the moulting period. Our observations indicated large differences in activity throughout the year of different components of the immune system. This suggests differences in function among the components and possibly differences in susceptibility to stress, parasitism and hormones during the annual cycle. When juveniles became independent of their parents, the immunoglobulin concentration increased, whereas other immune measures did not show a significant change. This indicates a rapid increase of at least one component of the immune system after the young fledge.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Ardea. - 98 : 1 (2010), p. 105-112. -
További szerzők:	Vágási Csongor István Tökölyi Jácint (1984-) (biológus) Czirják Gábor Á. Barta Zoltán (1967-) (biológus, zoológus)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
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001-es BibID:	BIBFORM030386
Első szerző:	Vágási Csongor István
Cím:	Correlates of variation in flight feather quality in the Great Tit Parus major / Csongor I. Vágási, Péter L. Pap, Jácint Tökölyi, Edina Székely, Zoltán Barta
Dátum:	2011
Megjegyzések:	The most important function of moult in birds is the renewal of deteriorated feathers. Worn and holey remiges may incur fitness costs, yet little is known about the factors responsible for the degree of feather wear and sources of variation in feather hole incidence. Here, we report results on variation in feather quality based on a study of three consecutive annual cycles of a Great Tit Parus major population. We found that month, age, sex, weight and the presence of feather holes are the main sources of variation in degree of wear. Juveniles and individuals with lower feather quality (measured through rachis diameter) and with fault bars present had higher feather hole loads. Feather abrasion peaked in the breeding season and was higher in females probably due to higher workload. The lower feather quality of juveniles compared to adults probably arises because of fast ontogeny in contrast to adults' prolonged moult. Our results indicate that feather deformities are positively interrelated and can be used as proxies of feather quality. Our findings on the correlates of feather holes seem partially contradictory with the widespread view that holes are feeding marks of chewing lice. We propose that feather holes are instead minor feather handicaps, at least in Great Tits.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban annual cycle fault bar feather deformities feather hole feather wear flight feather quality Parus major
Megjelenés:	Ardea. - 99 : 1 (2011), p. 53-60. -
További szerzők:	Pap Péter László (ökológus) Tökölyi Jácint (1984-) (biológus) Székely Edina Barta Zoltán (1967-) (biológus, zoológus)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM081432
Első szerző:	Végvári Zsolt (biológus)
Cím:	Roost Site Selection of the Common Crane in Its Largest European Stop-Over Site / Zsolt Végvári, Zoltán Barta
Dátum:	2015
ISSN:	0373-2266
Megjegyzések:	Along several migratory corridors in Europe, the Common Crane Grus grus exhibits a variety of migratory and roost site selection strategies. In this study we determined which environmental factors explained roost-site usage of Common Cranes in 64 fishponds and 25 marshes suitable for Crane roosting inside the Hortobágy National Park (HNP, Hungary) between 1995 and 2007. HNP has become the largest stop-over site of Cranes in Europe. Despite the relatively high number of potential roost sites, Cranes chose only 44% of suitable wetlands for roosting. Roost site selection of Common Cranes was primarily governed by conservation management measures, wetland type and size, as well as disturbance-related characteristics of the roost-site. Artificially flooded marshes, as well as large fishponds, actively managed through drainage, far from human settlements, are of critical importance for staging Common Cranes. The timing of controlled floods in marshes as well as the matching of drainage for fish-farming to migratory periods of Cranes, serve as suitable management measures for waterbird conservation. In summary, our study emphasizes the importance of managing large, undisturbed wetlands with species-specific management prescriptions in maintaining mass migrations of wetland birds.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk habitat selection bird migration wetland conservation Hortobágy human disturbance
Megjelenés:	Ardea. - 103 : 2 (2015), p. 175-181. -
További szerzők:	Barta Zoltán (1967-) (biológus, zoológus)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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