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1.

001-es BibID:BIBFORM023515
Első szerző:Barta Zoltán (biológus, zoológus)
Cím:The effects of patchiness and the nest location on mean flight distance: a model / Z. Barta
Dátum:1992
Megjegyzések:One of the advantages of colonial breeding may be the enhanced foraging efficiency through the location of colony. In a patchy environmental a colonial breeder may experience a shorter distance between the nest and an average food patch than an average dispersed breeder. How are this distance influanced by nest location, and varying patchiness? To develop a model of a predator moving by random walk in a patchy foraging area I found that: (i)the nest location in a bounded area influenced sufficiently the mean flight distance and (ii)the growing patchiness increases this distance.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
Megjelenés:Ornis Hungarica. - 2 (1992), p. 37-44. -
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2.

001-es BibID:BIBFORM023443
Első szerző:Barta Zoltán (biológus, zoológus)
Cím:Is information transfer always advantageous when food patcjily distributed? : A simple ESS model / Z. Barta, T. Szép
Dátum:1994
Megjegyzések:One of the potential benefits of colonial breeding may be using information on the lication of food gained from other members of the colony. Obtaining this information without searching may improve the foraging efficiency especially when food occursin rich patches whose locations are unpredictable both in space and time. A question is arising: is this efficiency really improved by the information transfer? using the game theory we modelled the problem by two strategies: (1) Searcher looks for food actively and 82) Follower reaches the food patch by following Searchers. Investigating the equilibrium between these strategies we concluded that information transfer may increase the individuals' average foraging efficiency when the Searchers gain benefits from the exchange too.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
Megjelenés:Ornis Hungarica. - 4 (1994), p. 25-30. -
További szerzők:Szép Tibor
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3.

001-es BibID:BIBFORM105584
Első szerző:Fülöp Attila (biológus)
Cím:Space use of wintering Eurasian Tree Sparrows (Passer montanus) in a semi-urban area: a radiotelemetry-based case study / Attila Fülöp, Dóra Lukács, Zoltán Barta
Dátum:2022
ISSN:1215-1610 2061-9588
Megjegyzések:Space use, which includes the home range and habitat utilisation pattern of individuals for different activities (e.g. foraging, roosting), is one of the fundamental aspects of a species ecology. Hence, knowledge on the different aspects of space use in general is essential to understand the relationship between species and their habitat. Here, we investigated the home range size (using the minimum convex polygon method; MCP) and roosting site selection, using radiotelemetry, in a sedentary passerine species, the Eurasian Tree Sparrows (Passer montanus). The study was carried out during the non-breeding period (i.e. wintering), in a semi-urban habitat where supplemental feeding was also available. We found that individuals had highly variable home ranges, both in shape and size (mean ? SD of 95% MCP: 6.89 ? 5.73 ha), the location of which was influenced by the presence of bird feeders. Roosting sites of the tracked individuals were largely consistent at an individual level, that is, all birds used the same locations for roosting during the whole tracking period, and the roosting sites of all individuals were located on buildings. Our results suggest that urbanised habitats can provide multiple benefits for the individuals during the winter in the form of easily accessible resources (e.g. food, roosting place), and individuals readily exploit these resources by adjusting their space use according to their availability.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
home range
roosting
radiotelemetry
Passer montanus
Megjelenés:Ornis Hungarica. - 30 : 2 (2022), p. 124-133. -
További szerzők:Lukács Dóra Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:OTKA-112527
OTKA
TKP2021-NKTA-32
Egyéb
PN-III-P1-1.1-TE-2021-0502)
Egyéb
CNFIS-FDI-2022-0179
Egyéb
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4.

001-es BibID:BIBFORM052181
Első szerző:Fülöp Attila (biológus)
Cím:Autumn migration of soaring birds in North Dobrogea, Romania : a study with implications for wind farm development / Attila Fülöp, Lőrinc Bărbos, Gábor M. Bóné, Szilárd J. Daróczi, Luca A. Dehelean, Réka B. Kiss, István Kovács, Attila Nagy, Tamás Papp
Dátum:2012
ISSN:2061-9588
Megjegyzések:In Dobrogea, a core area for wind energy exploitation in Romania, existing knowledge regarding the intensity and pattern of bird migration is limited. In the absence of enumerated data, wind farms may be constructed in areas where large aggregations of migrants pass. In this study we recorded the intensity of the autumn migration of soaring birds in three locations within the M¡acin Mountains, where wind farms are planned to be built. The locations chosen were at V¡ac¡areni, Greci and Cerna villages. Furthermore we categorized all migrating individuals as threatened or non-threatened by the planned wind farms, based on their migration routes and height at local scale. At V¡ac¡areni 4.716 individuals were counted, 3.394 raptors and 1.322 non-raptors, at Greci 2.387 individuals, 2.064 raptors and 323 non-raptors, and finally at Cerna, 5.268 individuals, 4.529 raptors and 739 non-raptors. At all three sites a significant proportion of birds, both raptors and non-raptors, were found to be threatened by the proposed wind farms. At V¡ac¡areni 68.33% of raptors and 84.95% of non-raptors were at threat, at Greci 44.48% and 54.18% respectively, and at Cerna 59.37% and 94.86%. As such we conclude that intensive migration occurs in North Dobrogea and wind farms would have a considerable negative impact on migrants in the studied areas.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
Mǎcin Mountains
migration corridor
raptors
wind energy
impact
Élettudományok - Biológiai tudományok
Megjelenés:Ornis Hungarica. - 20 : 2 (2012), p. 73-85. -
További szerzők:Bărbos Lőrinc Bóné Gábor Máté (PhD hallgató) Daróczi Szilárd J. Dehelean, Luca A. Kiss Réka B. Kovács István Nagy Attila Papp Tamás
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5.

001-es BibID:BIBFORM078511
Első szerző:Gyalus Adrienn (biológus)
Cím:Changes in the nest sites of White Stork (Ciconia ciconia) in Hungary / Adrienn Gyalus, Zsolt Végvári, Tibor Csörgő
Dátum:2018
ISSN:1215-1610 2061-9588
Megjegyzések:The breeding strategies of the White Stork changed drastically during the past decades: a decreasing number of individuals nest on traditional nest sites - trees, roofs, chimneys, whereas electricity poles are increasingly selected. Here we analysed long-term breeding data of White Storks breeding in six Hungarian counties to detect patterns in nest site preferences in Hungary. According to our results, the shift to preference for electricity poles was shown at the same rate in every county, independently from the proportion of original nest sites. After 2000, although electricity poles dominated everywhere, the proportion of nest on poles without platform increased, despite the abundance of available empty platforms. To explain this pattern, we propose that White Storks show a preference for viewpoints, thus choosing to breed as near as possible to optimal habitats, regardless of nest site types. Therefore, conservation measures concerning the nest sites of this species should include preliminary habitat analysis.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
nest site selection
population dynamics
species conservation
rural area
habitat selection
Hungary
Megjelenés:Ornis Hungarica. - 26 : 1 (2018), p. 65-88. -
További szerzők:Végvári Zsolt (1969-) (biológus) Csörgő Tibor (ornitológus)
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6.

001-es BibID:BIBFORM081911
Első szerző:Janó Gizella
Cím:Nest site selection of the Great Bustard (Otis t. tarda) in Körös-Maros National Park, Eastern Hungary / Gizella Janó, Zsolt Végvári
Dátum:2016
ISSN:1215-1610 2061-9588
Megjegyzések:In the present study we aimed to identify factors influencing the spatial distribution of Great Bustard (Otis t. tarda) nests found between 1998 and 2015 in Dévaványa-Ecseg area in Körös-Maros National Park. During the study period covering 17 years, we obtained information on 536 nests, which shows that Great Bustards used the following grassland crop types for breeding: wheat (43.07%), grassland (23.3%), fallow land (14.45%) and alfalfa (7.67%). These nests were found during the following activities: chemical weed control (33.63%), hay-cutting (25.37%), disking (8.55%) and harvesting (7.08%) and other 18 types of activities. To identify the effects of disturbance and environmental factors on the spatial distribution of nests, such as distances to lek sites, roads, settlements and altitude, we formulated generalized linear models. As a result, we found that nest sites were significantly closer to lek sites and farther from human settlements than expected by random sampling. Our results may contribute to the understanding of Great Bustard nest distributions, which can be helpful in nest detection prior to the initiation of disturbing agricultural activities, which is a key issue in the conservation of this bird. This study opens the way to analyse the effects of other environmental factors such as anthropogenic linear objects.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Megjelenés:Ornis Hungarica. - 24 : 2 (2016), p. 32-45. -
További szerzők:Végvári Zsolt (1969-) (biológus)
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7.

001-es BibID:BIBFORM086713
Első szerző:Kiss Valentin Adrian
Cím:Differences in eggshell pigmentation pattern between Common Moorhen Gallinula chloropus and Eurasian Coot Fulica atra eggs / Valentin Adrian Kiss, Liviu Răzvan Pripon, Attila Marton
Dátum:2020
ISSN:1215-1610 2061-9588
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Megjelenés:Ornis Hungarica. - 28 : 1 (2020), p. 176-180. -
További szerzők:Pripon, Liviu Răzvan Marton Attila (1990-) (biológus)
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8.

001-es BibID:BIBFORM061809
Első szerző:Kováts Dávid (környezetgazdálkodási agrármérnök)
Cím:Morphological classification of conspecific birds from closely situated breeding areas : A case study of the Common Nightingale / Kováts Dávid, Harnos Andrea
Dátum:2015
ISSN:1215-1610 2061-9588
Megjegyzések:In this paper, a complex morphological comparison of four Common Nightingalegroups (Luscinia megarhynchos) is demonstrated. In total, 121 territorial nightingales were mist-netted andmeasured individually on four study areas called 'Bódva', 'Felső-Tisza', 'Szatmár-Bereg' and 'Bátorliget' in theNorth-Eastern part of Hungary in 2006-2013. To distinguish groups by morphology, Classification and RegressionTrees (CART), Random Forest (RF) and Linear Discriminant Analysis (LDA) methods were used. Comparisonof the four studied Common Nightingale groups shows substantial morphological differences in the length of thesecond, the third and the fourth primaries (P2, P3, P4), in bill length (BL) and bill width (BW), while other characteristicsshowed greater similarities. Based on the results of all the applied classification methods, birds originatedfrom Szatmár-Bereg were clearly distinguishable from the others. The differences in morphology can be explainedby interspecific competition or phenotypic plasticity resulting from the change of ecological, environmental parameters.Our case study highlights the advantageous differences of the classification methods to distinguish groupswith similar morphology and to choose important variables for classification. In conclusion, broad application ofthe classification methods RF and CART is highly recommended in comparative ecological studies.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
Luscinia megarhynchos
classification and regression trees
random forest
linear discriminant analysis
morphological classification
Megjelenés:Ornis Hungarica. - 23 : 2 (2015), p. 20-30. -
További szerzők:Harnos Andrea
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9.

001-es BibID:BIBFORM114809
035-os BibID:(Scopus)85163382739
Első szerző:Lendvai Ádám Zoltán (biológus)
Cím:Bearded Reedling (Panurus biarmicus): the biology of a remarkable bird - a review of the recent literature / Lendvai, Ádám Z.
Dátum:2023
ISSN:1215-1610 2061-9588
Megjegyzések:The Bearded Reedling Panurus biarmicus is a frequent, yet relatively little-known passerine bird found in wetlands across Eurasia. The species is difficult to study because of its elusive nature and the challenging access to its habitat: old, particularly dense reed patches standing in water. However, a detailed body of knowledge of the species' natural history, morphology, and behaviour has been gathered over the years, providing insight into the adaptations this unusual bird uses to survive and even thrive under favourable conditions. In 2023, BirdLife Hungary named the Bearded Reedling as the ♭bird of the year'. In light of this notable designation, this article provides an overview of research advances on some of the unique characteristics of the Bearded Reedling, focusing on the factors that affect their population dynamics and potential conservation management strategies to protect the species.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Bearded Reedling
Panurus biarmicus
reed
population dynamics
conservation
Megjelenés:Ornis Hungarica. - 31 : 1 (2023), p. 1-1. -
Pályázati támogatás:K139021
OTKA
2019-2.1.11-TÉT-2019-00043
Egyéb
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10.

001-es BibID:BIBFORM072272
Első szerző:Nagy Jenő (biológus)
Cím:Phylogeny and evolution of the European Goldfinch (Carduelis carduelis) and its allies - a review of the "bird of the year" / Nagy Jenő
Dátum:2017
ISSN:1215-1610 2061-9588
Megjegyzések:In 2017 the European Goldfinch (Carduelis carduelis) was voted to be the "bird of the year" in Hungary. This is a partially migrant species; most of the European populations are resident, however, its breeding range extends to East from the Sweden-Poland-Moldova axis towards the Yenisei with some of the populations wintering in Kazakhstan and South of Turkey. The European Goldfinch is classified within the Carduelinae subfamily including approximately a hundred species. Several taxonomic changes were introduced in this group during the last fifteen years, however, we still do not understand much of their origin and evolutionary history. My aim in this paper is to collect existing knowledge on the phylogeny and evolution of the Carduelinae finches and their allies, with a particular focus on the European Goldfinch and its closest relatives. Furthermore, here I point out uncertainties in different phylogenetic sources of finches, which careful consideration can be useful in similar evolutionary studies. Finally, I summarise some vision for future research.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
Carduelinae
finches
Fringillidae
evolution
phylogeny
taxonomy
Megjelenés:Ornis Hungarica 25 : 2 (2017), p. 1-10. -
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11.

001-es BibID:BIBFORM054912
Első szerző:Nagy Jenő (biológus)
Cím:Phylogeny, historical biogeography and the evolution of migration in accipitrid birds of prey (Aves: Accipitriformes) / Jenő Nagy, Jácint Tökölyi
Dátum:2014
ISSN:1215-1610 2061-9588
Megjegyzések:Migration plays a fundamental part in the life of most temperate bird species. The regular,large-scale seasonal movements that characterize temperate migration systems appear tohave originated in parallel with the postglacial northern expansion of tropical species. Migratoriness is also influencedby a number of ecological factors, such as the ability to survive harsh winters. Hence, understandingthe origins and evolution of migration requires integration of the biogeographic history and ecology of birds in aphylogenetic context. We used molecular dating and ancestral state reconstruction to infer the origins and evolutionarychanges in migratory behavior and ancestral area reconstruction to investigate historical patterns of rangeevolution in accipitrid birds of prey (Accipitriformes). Migration evolved multiple times in birds of prey, the earliestof which occurred in true hawks (Accipitrinae), during the middle Miocene period, according to our analyses.In most cases, a tropical ancestral distribution was inferred for the non-migratory ancestors of migratory lineages.Results from directional evolutionary tests indicate that migration evolved in the tropics and then increasedthe rate of colonization of temperate habitats, suggesting that temperate species might be descendants of tropicalones that dispersed into these seasonal habitats. Finally, we found that diet generalization predicts migratorinessin this group.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
ancestral area reconstruction
annual cycle
comparative
diet specialization
diurnal birds of prey
molecular dating
seasonality
Élettudományok - Biológiai tudományok
Megjelenés:Ornis Hungarica. - 22 : 1 (2014), p. 15-35. -
További szerzők:Tökölyi Jácint (1984-) (biológus)
Pályázati támogatás:MTA-DE Lendület
MTA
Viselkedésökológiai Kutatócsoport
MTA-ELTE-MTM Ecology Research Group
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12.

001-es BibID:BIBFORM107668
Első szerző:Németh Zoltán (biológus)
Cím:Partial migration and decreasing migration distance in the Hungarian population of the Common Blackbird (Turdus merula Linnaeus, 1758): Analysis of 85 years of ring recovery data / Zoltán Németh
Dátum:2017
ISSN:1215-1610 2061-9588
Megjegyzések:The Common Blackbird is a partial migrant throughout much of its range in Europe. That is, part of its breeding population migrates while the rest stays at the breeding ground for winter. Given the rapidly changing global climate, it is important to understand how migratory birds, including partial migrants, res-pond to shifting climatic conditions. In this study, I analyzed 85 years of ring recovery data of the Hungarian po-pulation of the Blackbird, ringed during the breeding season and recovered during migration or winter, with two objectives in mind: (1) to assess whether the Hungarian Blackbird population is also partially migratory, and (2) to test the prediction that Blackbirds have exhibited decreasing migration distances over the past decades as ex-pected based on warming winter temperatures. Hungarian Blackbirds expressed both migratory and resident stra-tegies, thus can be considered as partial migrants. Furthermore, Blackbirds had been recovered increasingly closer (-5.9 km/year) to their breeding grounds in the past decades. Age and sex had no effects on recovery distance. Pro-vided that this trend continues, the adaptive benefits of migratory behavior may eventually be reduced to a level that selection will not maintain it in the population and the Hungarian population becomes entirely sedentary. Sur-prisingly, 88% of migrant recoveries were the result of shooting or hunting activities in Mediterranean countries, primarily in Italy, highlighting both the need to understand the effects of hunting pressure on migratory behavior at the population level in songbirds and the urgency to ban the killing of migratory birds in European countries.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Eurasian Blackbird
European Blackbird
migratory bird
climate change
hunting
partial migration
Megjelenés:Ornis Hungarica. - 25 : 1 (2017), p. 101-108. -
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