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1.

001-es BibID:BIBFORM117849
035-os BibID:(Scopus)85181504820 (WOS)001136530300001
Első szerző:Engel, Noémie
Cím:Climatic variation influences annual survival of an island-breeding tropical shorebird / Noémie Engel, Brett K. Sandercock, András Kosztolányi, Andreia Adrião, Alex Tavares, Romy Rice, Tamás Székely
Dátum:2024
ISSN:0908-8857
Megjegyzések:Global biodiversity loss is a major environmental concern. The wildlife on islands are particularly vulnerable to threats posed by alien predators, habitat loss and overexploitation. Effective conservation management of vulnerable species requires reliable information on vital population rates for all life stages and an understanding of key environmental drivers. However, demographic data are often not available for island populations before they decline or are extirpated. Here, we use Cormack?Jolly?Seber (CJS) models and 15 years of data for 1370 juveniles and 687 adults to estimate apparent survival for a genetically distinct resident population of Kentish plovers Charadrius alexandrinus on the island of Maio, Cabo Verde. We report two main findings. First, environmental conditions have a large effect on demographic performance since chicks that hatch during dry years experience a tenfold reduction in first-year survival compared to chicks that hatch during wet years. Second, female and male plovers in Maio are expected to live for 7.41 ? 0.69 (mean ? SE) years and 6.75 ? 0.64 years, respectively, due to relatively high annual survival among comparable-sized shorebirds. High adult survival thus could buffer the population against low reproductive success that this population has experienced over the last decade. Cabo Verde is typical of tropical islands with increased development that can impact native breeders and/or will accelerate habitat loss. Thus, more frequent droughts associated with climate change may exacerbate the prospects of native wildlife on many islands.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
apparent survival
demography
island conservation
Kentish plover
Macaronesia
wader
Megjelenés:Journal Of Avian Biology. - [Epub ahead of print] (2024). -
További szerzők:Sandercock, Brett K. Kosztolányi András (1971-) (biológus) Adrião, Andreia Tavares, Alex Rice, Romy Székely Tamás (1959-) (biológus)
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2.

001-es BibID:BIBFORM079544
Első szerző:Fülöp Attila (biológus)
Cím:Cohabitation with farm animals rather than breeding effort increases the infection with feather-associated bacteria in the barn swallow / Fülöp Attila, Vágási István Csongor, Pap Péter László
Dátum:2017
ISSN:0908-8857
Megjegyzések:Feather-associated bacteria are widespread inhabitants of avian plumage. However, the determinants of the between-indi-vidual variation in plumage bacterial loads are less well understood. Infection intensities can be determined by ecological factors, such as breeding habitat, and can be actively regulated by hosts via preening. Preening, yet, is a resource intensive activity, and thus might be traded-off against reproductive investment in breeding birds. Here, we studied barn swallows Hirundo rustica to assess the bacterial cost of reproduction in relation to nesting site micro-habitats. Barn swallows prefer to breed in the company of large-sized farm animals, although the presence of mammalian livestock in barns assures a warm and humid micro-climate that favours bacterial proliferation. Thus, we experimentally manipulated brood sizes of birds breeding in barns with, or without, farm animals and measured total cultivable bacteria (TCB) and feather-degrading bacteria (FDB) from the plumage. We found that the abundance of feather-associated bacteria (i.e. both TCB and FDB) in females, but not males, breeding in barns with livestock were significantly higher than in conspecifics breeding in empty barns. Plumage bacterial loads, however, were not affected by brood size manipulations in either sex. In addition, we report a negative relationship between both TCB and FDB and hatching date in females, and several sex and seasonal differences in plumage bacterial abundances. Our study is the first to show that breeding micro-habitat (i.e. livestock co-tenancy) has consequences for the abundance of feather-associated bacteria.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal of Avian Biology. - 48 : 7 (2017), p. 1005-1014. -
További szerzők:Vágási Csongor István Pap Péter László (ökológus)
Pályázati támogatás:NKFIH - 112527
Egyéb
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3.

001-es BibID:BIBFORM102037
035-os BibID:(cikkazonosító)e02866 (WoS)000765783700001 (Scopus)85128498856
Első szerző:Hargitai Rita
Cím:Food restriction delays breeding and affects insulin-like growth factor-1, oxidative damage and haematocrit value before egg-laying in female canaries / Rita Hargitai, Nóra Boross, Zsófia Tóth, Ádám Z. Lendvai
Dátum:2022
ISSN:0908-8857
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal Of Avian Biology. - 2022 : 4 (2022), p. 1-13. -
További szerzők:Boross Nóra Tóth Zsófia (1991-) (biológus) Lendvai Ádám Zoltán (1977-) (biológus)
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4.

001-es BibID:BIBFORM028109
Első szerző:Hargitai Rita
Cím:Eggshell characteristics and yolk composition in the common cuckoo Cuculus canorus: are they adapted to brood parasitism? / Rita Hargitai, Csaba Moskát, Miklós Bán, Diego Gil, Isabel López-Rull, Emese Solymos
Dátum:2010
ISSN:0908-8857
Megjegyzések:The developmental rate of cuckoo embryos and their hatching size is greater than that of host species, which may require more nutrient resources in the egg and more intensive gas exchange during development. In the present study, we compared various egg characteristics of a brood parasite, the common cuckoo Cuculus canorus, and its frequent host, the great reed warbler Acrocephalus arundinaceus. As maternally-derived testosterone is known to enhance growth rate of embryos and hatchlings, cuckoo eggs are expected to contain higher concentration of testosterone than host eggs. In addition, we expected higher concentration of antioxidants in cuckoo eggs to protect embryos from oxidative stress associated with accelerated growth. Our results showed that cuckoo eggs had thicker shells and higher pore density than great reed warbler eggs. Yolk was significantly heavier in cuckoo eggs and contained higher concentrations of carotenoids and vitamin E, however, yolk androgen and immunoglobulin concentrations were lower in cuckoo eggs as compared to great reed warbler eggs. We also examined whether eggshell colour was associated to egg quality, and detected a positive association between blue-green chroma and yolk antioxidant concentration in both species, suggesting that eggshell colour reflects the antioxidant investment of the female into the eggs. Our results suggest that cuckoo females increase the size, growth rate and competitive ability of their young by providing them with more nutrients and more dietary antioxidants for embryonic development, and not through elevated yolk testosterone or antibody levels. In addition, increased porosity of cuckoo eggshells may allow embryos to develop more rapidly because of a greater capacity of gas exchange.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Journal Of Avian Biology. - 41 : 2 (2010), p. 177-185. -
További szerzők:Moskát Csaba Bán Miklós (1975-) (biológus) Gil, Diego López-Rull, Isabel Solymos Emese
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5.

001-es BibID:BIBFORM095753
Első szerző:Lengyel Szabolcs (biológus)
Cím:Spatial differences in breeding success in the Pied Avocet Recurvirostra avosetta : ffects of habitat on hatching success and chick survival / Szabolcs Lengyel
Dátum:2006
ISSN:0908-8857
Megjegyzések:I studied the breeding biology of pied avocets Recurvirostra avosetta in natural habitats (alkaline lakes), and in semi-natural sites (dry fishpond, reconstructed wetlands) in Hungary to relate habitat selection patterns to spatial and temporal variation in breeding success. Colonies were initiated earlier in semi-natural sites than in natural habitats, and earlier on islands than on the mainland. Hatching success was higher on islands than on the mainland, in semi-natural sites than in natural habitats, in colonies of at least 15 pairs than in smaller colonies, and for nests initiated earlier than later within a colony. Fledging success was higher in the wet years (1999-2000) than in the dry year (1998), decreased strongly by season in both habitats and increased with average daily temperature in the first week post-hatch in 1999-2000. Most pairs hatching young in semi-natural sites attempted to lead their chicks to feeding areas in natural habitats, whereas no such movement occurred in the opposite direction. Chick mortality due to predation was high during brood movements and only 23% of the pairs moving their young produced fledglings, compared to 43% for pairs remaining in semi-natural sites and 68% for pairs hatching and rearing young in natural habitats (total n = 192 broods). These results suggest that semi-natural sites were more suitable for nesting, whereas natural habitats were more suitable for chick-rearing. The opposing trends in habitat-related breeding success between nesting and chick-rearing suggest sub-optimal habitat selection by Pied Avocets due to an incorrect assessment of the potential for successful reproduction of semi-natural sites, which may thus function as ecological traps.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal of Avian Biology. - 37 : 4 (2006), p. 381-395. -
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6.

001-es BibID:BIBFORM018803
Első szerző:Pap Péter László (ökológus)
Cím:Increase of feather quality during moult : a possible implication of feather deformities in the evolution of partial moult in the great tit Parus major / Péter L. Pap, Zoltán Barta, Jácint Tökölyi, Csongor I. Vágási
Dátum:2007
Megjegyzések:Here we investigate the change in feather quality during partial post-juvenile and complete post-breeding moult in great tit Parus major by measuring the change in the number of fault bars and feather holes on wing and tail feathers. Feathers grown during ontogeny usually are of lower quality than feathers grown following subsequent moults at independence. This is reflected by higher number of fault bars and feather holes on juveniles compared to adults. Fault bars are significantly more common on tail and proximal wing feathers than on the distal remiges, indicating a mechanism of adaptive allocation of stress induced abnormalities during ontogeny into the aerodynamically less important flight feathers. On the contrary, feather holes produced probably by chewing lice have a more uniform distribution on wing and tail feathers, which may reflect the inability of birds to control their distribution, or the weak natural selection imposed by them. The adaptive value of the differential allocation of fault bar between groups of feathers seems to be supported by the significantly higher recapture probability of those juvenile great tits which have fewer fault bars at fledging on the aerodynamically most important primaries, but not on other groups of flight feathers. The selection imposed by feather holes seems to be smaller, since except for the positive association between hatching date, brood size and the number of feather holes at fledging, great tits' survival was not affected by the number of feather holes. During post-juvenile moult, the intensity of fault bars drops significantly through the replacement of tail feathers and tertials, resulting in disproportional reduction of the total number of fault bars on flight feathers related to the number of feathers replaced. The reduction in the number of fault bars during post-juvenile moult associated with their adaptive allocation to proximal wing feathers and rectrices may explain the evolution of partial post-juvenile moult in the great tit, since the quality of flight feathers can be increased significantly at a relatively small cost. Our results may explain the widespread phenomenon of partial post-juvenile moult of flight feathers among Palearctic passerines. During the next complete post-breeding moult, the total number of fault bars on flight feathers has remained unchanged, indicating the effectiveness of partial post-juvenile moult in reducing the number of adaptively allocated fault bars. The number of feather holes has also decreased on groups of feathers replaced during partial post-juvenile moult, but the reduction is proportional with the number of feathers moulted. In line with this observation, the number of feather holes is further reduced during post-breeding moult on primaries and secondaries, resulting in an increase in feather quality of adult great tits.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Journal of Avian Biology. - 38 : 4 (2007), p. 471-478. -
További szerzők:Tökölyi Jácint (1984-) (biológus) Vágási Csongor István Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:OTKA
T046661
OTKA
NF061143
Internet cím:DOI
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7.

001-es BibID:BIBFORM013407
Első szerző:Pap Péter László (ökológus)
Cím:Seasonality in the uropygial gland size and feather mite abundance in house sparrows Passer domesticus: natural covariation and an experiment. / Péter L. Pap, Csongor I. Vágási, Gergely Osváth, Cosmin Mureşan, Zoltán Barta
Dátum:2010
Megjegyzések:The seasonal change, i.e. the marked differences between seasons of low and high productivity, in the abundance ofectosymbionts and the defence intensity of the host against pathogens is a well defined characteristic of temperate zoneorganisms. Here we investigate the seasonal variation in the uropygial gland size and the abundance of Proctophyllodesfeather mites on the wing feathers of house sparrows Passer domesticus in two breeding populations. The size of theuropygial gland varied significantly in male and female house sparrows over the annual cycle. The gland was small duringthe non-breeding and mating season, after that it started to grow sharply, reaching its maximum size during breeding.Females had larger gland volumes than males during breeding, and the increase in gland size during breeding was morepronounced in females than in males. The number of feather mites was the lowest during breeding, followed by anincrease during moult and reaching its maximum between the wintering and mating seasons. The absence of a significantrelationship between the uropygial gland size and the abundance of feather mites, after controlling for potentialconfounding variables, supports the view that gland oils do not regulate the number of mites. To investigate further thishypothesis, through a full factorial experimental design we tested the effect of uropygial gland and photoperiodmanipulation on the population size and population dynamics of feather mites. The manipulation of uropygial gland hadno effect on mites, supporting our observational results. As a result of the experimentally increased day-length, theabundance of feather mites on wing feathers decreased significantly and more sharply than in the control group,supporting the previous anecdotal evidence about the photosensitivity of these organisms. Using photoperiodic cues,feather mites may respond to seasonal changes that affect their life-history and population dynamics.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Journal of Avian Biology. - 41 : 6 (2010), p. 653-661. -
További szerzők:Vágási Csongor István Osváth Gergely (1985-) (biológus) Mureşan, Cosmin Barta Zoltán (1967-) (biológus, zoológus)
Internet cím:DOI
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8.

001-es BibID:BIBFORM115078
035-os BibID:(Scopus)85123469340 (WOS)000746229000001
Első szerző:Šálek, Miroslav
Cím:Beyond habitat: effects of conspecific and heterospecific aggregation on the spatial structure of a wetland nesting bird community / Miroslav Šálek, Martin Sládeček, Vojtěch Kubelka, Jiří Mlíkovský, David Storch, Petr Šmilauer
Dátum:2022
ISSN:0908-8857
Megjegyzések:Nest location is a key factor influencing reproductive success in birds, and habitat choice is considered the main way in which birds select nest sites. Less attention has been devoted to the demand for proximity to other bird nests, which can provide additional profit, namely defense against predators. Here we analyzed the contributions of habitat, and conspecific and heterospecific aggregation to the spatial arrangement of breeding birds in a model bird community. We surveyed a pristine Siberian wetland bird community with the aim to locate all bird territories or nests, in 1993 and 2013. Habitat explained much of the nest site choice, but the nests were aggregated both intra- and inter-specifically more than the spatial pattern of the habitat could explain. In particular, ducks, grebes and some waders bred nearby the most abundant active nest defenders, such as gulls and terns. Heterospecific associations were particularly pronounced in 2013, when the community was impoverished and one common active defender (white-winged black tern Chlidonias leucopterus) was replaced by a less numerous but aggressive predator (Mongolian gull Larus mongolicus). The results suggest that spatial pattern in bird nests may be influenced by the (dis)appearance of one or a few species, which can play a role as umbrella or predator species. Integration of factors supporting the breeding of umbrella species, such as gulls, may became key targets for comprehensive conservation measures in large wetlands.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal Of Avian Biology. - 2022 : 2 (2022), p. 1-15. -
További szerzők:Sládeček, Martin Kubelka, Vojtech Mlíkovský, Jiří Storch, David Šmilauer, Petr
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9.

001-es BibID:BIBFORM107652
035-os BibID:(cikkazonosító)e03029 (Scopus)85146456025 (WoS)000916448000001
Első szerző:Zenzal, Theodore J.
Cím:Local weather and endogenous factors affect the initiation of migration in short-and medium-distance songbird migrants / Theodore J. Zenzal , Darren Johnson, Frank R. Moore, Zoltán Németh
Dátum:2023
ISSN:0908-8857
Megjegyzések:Migratory birds employ a variety of mechanisms to ensure appropriate timing of migration based on integration of endogenous and exogenous information. The cues to fatten and depart from the non-breeding area are often linked to exogenous cues such as temperature or precipitation and the endogenous program. Shorter distance migrants should rely heavily on environmental information when initiating migration given relatively close proximity to the breeding area. However, the ability to fatten and subsequently depart may be linked to individual circumstances, including current fuel load and body size. For early and late departing migrants, we investigate effects of temperature, precipitation, lean body mass, fuel load and day of year on the initiation of migration (i.e. fuel load and departure timing) from the non-breeding region by analyzing 21 years of banding data for four species of short- and medium-distance migrants. Temperatures at the non-breeding area were related to temperatures at potential stopover areas. Despite local cues being predictive of conditions further north, the amount variation explained by local weather conditions in our models differed by species and temporal period but was low overall (< 33% variation explained). For each species, we also compared lean body mass and fuel load between early and late departing migrants, which showed mixed results. Our combined results suggest that most individuals migrating short or medium distances in our study did not time the initiation of migration with local predictive cues alone, but rather other factors such as lean body mass, fuel load, day of year, which may be a proxy for the endogenous program, and those beyond the scope of our study also influenced the initiation of migration. Our study contributes to understanding which factors influence departure decisions of short- and medium-distance migrants as they transition from the non-breeding to the migratory phase of the annual cycle.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
departure decisions
house wren Troglodytes aedon
ruby-crowned kinglet Corthylio calendula
swamp sparrow Melospiza georgiana
weather
white-throated sparrow Zonotrichia albicollis
Megjelenés:Journal Of Avian Biology. - 3-4 (2023), p. 1-19. -
További szerzők:Johnson, Darren Moore, Frank R. (biológus) Németh Zoltán (1976-) (biológus)
Pályázati támogatás:FK 124414
Egyéb
ÚNKP-21-5
Egyéb
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10.

001-es BibID:BIBFORM060674
Első szerző:Zölei Anikó
Cím:No change in common cuckoo parasitism and great reed warblers' egg rejection after seven decades / Anikó Zölei, Miklós Bán, Csaba Moskát
Dátum:2015
ISSN:0908-8857
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Journal Of Avian Biology. - 46 (2015), p. 1-7. -
További szerzők:Bán Miklós (1975-) (biológus) Moskát Csaba
Internet cím:DOI
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