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001-es BibID:	BIBFORM085707
Első szerző:	Lengyel Szabolcs (biológus)
Cím:	Investigation of parental care in avocets from the perspectives of behavioural ecology and conservation biology / Lengyel Szabolcs
Dátum:	2002
ISSN:	0567-7327
Megjegyzések:	This research encompasses both basic (behavioural ecology) and applied (conservation biology) aspects of the biology of Avocets (Recurvirostra avosetta L.). My central question is whether adoption of alien young can be adaptive for adults and the adopted chicks. I evaluate proximate-level hypotheses by quantifying costs and/or benefits of both adopters and adoptees. I observed adoption of alien chicks in 19% of the families in 1998 and 1999. My rst results suggest that adoption may be adaptive for both the adoptive adult and the adopted chick. This is because adopted chicks were more likely to fledge than their siblings remaining in their own family and the fledging success of the adopter adults' own chicks was higher than that of nonadoptive adults' chicks. In my applied research I collect data on avocet breeding biology to nd out whether the current population increase in Hungary results from the reproductive output of the Hungarian population or is maintained by an influx of birds from coastal populations. I also use these data to design and implement effective conservation measures by which to further enhance the Hungarian population of the endangered Avocet. I successfully increased the hatching success of mainland nests by erecting a fence to keep ground predators away. The fledging success of chicks also increased after a predator control in the most affected areas. By providing information about the timing of nesting to nature conservation authorities I assured the successful breeding of one fifth of Hungary's avocet population on a fishpond in 1999.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk Adoption Alloparental care Charadrii Enhancement of breeding success Reproductive strategies Waders
Megjelenés:	Acta Biologica Debrecina. - 24 (2002), p. 177-186. --
Pályázati támogatás:	F026394 OTKA F030403 OTKA
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM085708
Első szerző:	Magura Tibor (ökológus)
Cím:	Carabids in an oak-hornbeam forest: testing the edge effect hypothesis / Magura Tibor, Tóthmérész Béla, Bordán Zsuzsa
Dátum:	2002
ISSN:	0567-7327
Megjegyzések:	The edge effect was studied along a forest - forest edge transect in an oak-hornbeam forest at the Aggtelek National Park in Hungary using pitfall trappedcarabid beetle s. By moving window-technique we separated carabid assemblages of the forest and the forest edge. The same partition was shown by environmental variables. Regression analysis and one-way ANOVA showed a signifcant carabid edge effect. The counts of trapped carabid individuals, the number of species and diversity increased along the transect towards the forest edge. Indicator species, characterising forest edge and forest interior were identified. The forest edge had a particular carabid assemblage with edge associated species. Correlation analyses suggested that percentage leaf litter, herb, shrub and canopy cover were important factors determining the counts, number of species and diversity of carabid assemblages along the transect.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk Carabid beetles Edge effect Forest edge Diversity Moving window-technique Environmental factors
Megjelenés:	Acta Biologica Debrecina. - 24 (2002), p. 55-72.
További szerzők:	Tóthmérész Béla (1960-) (ökológus) Bordán Zsuzsanna
Pályázati támogatás:	T25888 OTKA T32130 OTKA
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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