Összesen 7 találat.


001-es BibID:BIBFORM061801
Első szerző:Ács Zoltán
Cím:Phylogenetic patterns of a nightingale population in a contact zone of Luscinia megarhynchos and L. luscinia in Hungary / Zoltán Ács, Dávid Kováts
ISSN:1584-9074 1843-5629
Megjegyzések:Phylogenetic patterns of two closely related nightingale species the Luscinia megarhynchos and the L.luscinia were investigated in north-eastern part of Hungary. The mitochondrial cytochrome-c oxidase subunitI (COI) gene amplified by polymerase chain reaction (PCR) and sequenced directly to set up theirphylogenetic relationships. In eastern Hungary (Szatmár-Beregi Landscape Protected Area, Vámosatya, Bockerek forest 48(degree)11'N, 22(degree)23'E), a new haplotype of L. luscinia is discovered. Based on our molecular result, however, no individual of L. luscinia was found in the Upper-Tisza Region (especially between Tiszabercel and Tiszatelek), where its old breeding stands formerly occurred. It suggests its population might extinctfrom this region, or partially shifted to undisturbed territories, probably due to ecological impoverishment offloodplain forest associations. Furthermore, it appears that range expansion of L. megarhynchos increased inthose of fragmented habitats.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
new haplotype
habitat requirements
habitat loss
interspecific competition
climate change
Megjelenés:North-Western Journal of Zoology. - 9 : 2 (2013), p. 365-373. -
További szerzők:Kováts Dávid (1979-) (környezetgazdálkodási agrármérnök)
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001-es BibID:BIBFORM061860
Első szerző:Antal László (hidrobiológus, biológus-ökológus)
Cím:Changes in fish assemblage in the Hungarian section of River Szamos/Somes after a massive cyanide and heavy metal pollution / Antal László, Halasi-Kovács Béla, Nagy Sándor Alex
ISSN:1584-9074 1843-5629
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:North-Western Journal of Zoology. - 9 : 1 (2013), p. 131-138. -
További szerzők:Halasi-Kovács Béla (1970-) (ökológus) Nagy Sándor Alex (1956-) (hidrobiológus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat


001-es BibID:BIBFORM055341
Első szerző:Juhász Krisztina (biológus-ökológus)
Cím:Main versus alternative prey of Eurasian otters in an East-European artificial wetland system / Juhász Krisztina, Végvári Zsolt, Perpék Mónika, Lukács Balázs András, Nagy Sándor Alex
Megjegyzések:The dietary composition of the Eurasian otter (Lutra lutra) inhabiting an artificial wetland system,used for aquaculture, was studied over a two-year period in north-eastern Hungary using spraint analyses.Samples were collected on monthly basis along a standard line transect. The main component of the diet wasfish, followed by amphibians, birds, insects, mammals, molluscs and reptiles. Except for mammals, we didnot find any significant seasonal variation in the composition of prey. Birds were mostly preferred in the firstperiod of the study years, while mammals were dominant in the second one. Most insects were preyed uponin spring, similar to the case of amphibians. Otters did not show any seasonal variation in their trophic niche,most likely due to stable food resource, and the niche breadth was similar between wetland units. Thepreference for various fish species varied significantly by weight category between fishponds. However,independent of weight and pond categories, pike (Esox lucius) was consistently preferred, similar to carpspecies (Carassius sp.) of smaller body mass. Further, we investigated the ratio of economically important fishspecies against hibernating species by analysing spraints from winter months. We found that, the ratio ofeconomically important species was high; suggesting an optimisation of subsidies for fish-farming.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
diet composition
Lutra lutra
spraint analysis
Megjelenés:North-Western Journal of Zoology. - 10 : 1 (2014), p. 1-9 -
További szerzők:Végvári Zsolt (1969-) (biológus) Perpék Mónika Lukács Balázs András (1979-) (ökológus) Nagy Sándor Alex (1956-) (hidrobiológus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat


001-es BibID:BIBFORM055342
Első szerző:Juhász Krisztina (biológus-ökológus)
Cím:Effects of extensive fishpond management and human disturbance factors on Eurasian otter (Lutra lutra L. 1758) populations in Eastern Europe / Juhász Krisztina, Lukács Balázs András, Perpék Mónika, Nagy Sándor Alex, Végvári Zsolt
Megjegyzések:Wetland losses related to human activities in the past decades have caused heavy decline in thepopulation of the Eurasian otter (Lutra lutra Linnaeus) throughout Europe. As otters are often used as flagshipspecies for wetland conservation programmes, the understanding of their response to human disturbanceand environmental factors is essential to fine-tune conservation tools for managing artificial water bodies.In this study we estimate which wetland characteristics and human factors to what extent drive the spatialdistribution of otters. We investigated factors related to the habitat selection of Eurasian otters betweenDecember 2004 and January 2007 on 31 fishponds in the Hortobágy National Park, Eastern Hungary. Wehave shown that otter habitat selection is primarily governed by both disturbance-related characteristics andvegetation properties of fishponds, and not by humans. Moreover, we did not find the effects of artificialfisheries inputs or hunting pressures. Fishponds far from human settlements with large reed islands anddykes with trees are the key habitats for Eurasian otters. However, the presence of adjacent forests and grazingareas negatively affect the otter sign densities in fishponds.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
habitat selection
Megjelenés:North-Western Journal of Zoology. - 9 : 2 (2013), p. 227-238. -
További szerzők:Lukács Balázs András (1979-) (ökológus) Perpék Mónika Nagy Sándor Alex (1956-) (hidrobiológus) Végvári Zsolt (1969-) (biológus)
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001-es BibID:BIBFORM060288
Első szerző:Malina Tamás (biológus)
Cím:Misdiagnosed Vipera envenoming from an unknown adder locality in northern Hungary / Tamás Malina, Péter Schuller, László Krecsák
ISSN:1584-9074 1843-5629
Megjegyzések:We report a misdiagnosed Vipera envenoming from northern Hungary from an as yet unknown viper-locality. A 64-year-old previously healthy male was bitten in the Bükk Mountains in July 2009, and hasnot presented at a doctor on the day of accident, although he suffered from mild and transient systemicsymptoms and moderate local consequences following the bite. First the case was misdiagnosed and it wasnot handled as a possible adder-bite in a General Practicioner's office, despite the unambiguous visible localreactions. Eventually he was admitted to the medical centre of the county, the Borsod-Abaúj-Zemplén Countyand University Hospital in Miskolc, where fluid replacement and corticoid therapy were performed. Basedon the symptoms we attribute the incident definitely to envenoming by a viper. The presence of an isolatednatural Common adder (Vipera berus) population in this locality cannot be completely excluded, since theclosest population is reported from Monok in the Szerencs Hills (which is geologically connected to the ZemplénHills, that has one of the highest adder population densities in the country), approximately 45 km fromthe place of this incident. The occurrence of another captive-kept, but released, European viper species maybe an alternative, but quite implausible explanation. This is the first envenomation reported outside theknown Hungarian range of V. berus. The case highlights the possibility to enhance biogeographic data on certainspecies by using reports from different scientific fields such as clinical toxicology and emergency medicine,especially when the geographic distribution of venomous snakes is surveyed; thus analysis of availableclinical records is highly encouraged.
Tárgyszavak:Természettudományok Biológiai tudományok esettanulmány
latent paresis
Bükk Mountains
Vipera berus
Borsod-Abaúj-Zemplén County
Megjelenés:North-Western Journal of Zoology. - 7 : 1 (2011), p. 87-91. -
További szerzők:Schuller Péter (1976-) (orvos) Krecsák László
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001-es BibID:BIBFORM075773
Első szerző:Szabolcs István Márton (biológus ökológus)
Cím:First record of the eastern spadefoot toad (Pelobates syriacus Boettger, 1889) in Albania / Szabolcs Márton, Mizsei Edvárd
ISSN:1584-9074 1843-5629
Tárgyszavak:Természettudományok Biológiai tudományok levél
Megjelenés:North-Western Journal of Zoology. - 13 (2017), p. 175-176. -
További szerzők:Mizsei Edvárd (1989-) (biológus ökológus)
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001-es BibID:BIBFORM083824
035-os BibID:(cikkazonosító)e181102
Első szerző:Szanyi Szabolcs (biológus, ökológus)
Cím:Flower visiting preferences of bumblebees (Apidae: Bombus spp.) in grasslands of the Velyka Dobron' Game Reserve (Transcarpathia, Ukraine) / Szabolcs Szanyi, Anikó Kovács-Hostyánszki, Zoltán Varga, Antal Nagy
ISSN:1584-9074 1843-5629
Megjegyzések:Frequency of flower visitations of six bumble bee (Bombus) species was surveyed in Transcarpathia (Ukraine). In four areas of the Game Reserve of Nagydobrony and surroundings five-five sampling quadrates were designated. The frequency of flower visitations of 16 dominant plant species (7 spp. in Fabaceae, 3 spp. in Asteraceae, 3 spp. in Lamiaceae, and 3 species from other families) were registered in four repetitions in mid-summer. The most frequent large bumble bee species, B. terrestris, exploited the widest spectrum of flower sources, with insignificant preference for Lotus corniculatus, Prunella vulgaris and Lythrum salicaria. The flower visitation of B. lapidarius was characterised by the high frequency of L. salicaria and Medicago sativa. The small bumble bee species, B. pascuorum, B. sylvarum and B. humilis, also showed significantly different preferences. Generally, the three most frequently visited plant species belonged to Fabaceae, followed by Symphytum officinale (Boraginaceae). We did not observe any significant difference between large vs. small bumble bees, either concerning the nectar source families or in length and shape of the visited flower corollas. Significant influence of flower colours, both as they are experienced by bumble bees (blue, bluish-green) and according to the visible colours (purple), was found on the flower visitation by nearly all bumble bee species. Since practically all species have shown somewhat different preferences for nectar sources, we could not observe any genuine communities of bumble bees; however, accidental feeding assemblages can exist based on high preferences of species in Fabaceae.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
colour preferences
corolla length
large and small species
Megjelenés:North-Western Journal of Zoology. - 16 : 1 (2020), p. 21-28. -
További szerzők:Kovács-Hostyánszki Anikó Varga Zoltán (1939-) (professor emeritus, evolúcióbiológus, zoológus) Nagy Antal (1976-) (biológus)
Pályázati támogatás:TÁMOP-4.2.4.A/ 2-11/1-2012-0001
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