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14. High Turnover Rate Revealed By Non-Invasive Genetic Analyses In An Expanding Eastern Imperial Eagle Population

Author

Vili, N., Szabo, K., Szilvia Kovacs, Kabai, P., Kalmar, L., and Horvath, M.

Subjects
Természettudományok, Biológiai tudományok, Biodiversity, Taxonomy
Abstract

Vili, N., Szab��, K., Kov��cs, Sz., Kabai, P., Kalm��r, L., Horv��th,. (2013): High Turnover Rate Revealed By Non-Invasive Genetic Analyses In An Expanding Eastern Imperial Eagle Population. Acta Zoologica Academiae Scientiarum Hungaricae 59 (3): 279-295, DOI: http://doi.org/10.5281/zenodo.5736217, {"references":["ALCAIde, M., CAdAHIA, L., LAMBeRTuCCI, S. A. & NegRO, J. J. (2010) Noninvasive estimation ofminimumpopulationsizesandvariabilityofthemajorhistocompatibilitycom- plexintheAndeanCondor. TheCondor 112: 470-478. doi: 10.1525/cond.2010.090203","BAgyuRA, J., SZITTA, T., HARASZTHy, L., FIRMAnSZky, G., VISZLO, L., KOVACS, A., DeMeTeR, I. & HORVATH, M. (2002) PopulationincreaseofimperialeagleAquilaheliacainHungary between 1980 and 2000. Aquila 107-108: 133-144.","BAnHOS, A., HRBek, T., GRAVenA, W., SAnAIOTTI, T. & FARIAS, I. P. (2008) Genomic resources- fortheconservationandmanagementoftheharpyeagleHarpiaharpyja, Falconi- formes, Accipitridae. GeneticsandMolecularBiology 31: 146-154. doi: 10.1590/S1415- 47572008000100025","BAO, W. B., MuSA, H. H., LuAn, D. Q., ZHAng, H. X. & CHen, G. H. (2009) Molecular method ofsexidentificationinSiberianWhiteCraneGrusleucogeranus. JournalofApplied Animal Research 35: 169-172. doi: 10.1080/09712119.2009.9707010","BAyARdDeVOLO, S., ReynOLdS, R. T., DOugLAS, M. R. & AnTOLIn, M. F. (2008) Animproved extractionmethodtoincreaseDNAyieldfrommoltedfeathers. TheCondor 110: 762- 766. doi: 10.1525/cond.2008.8586","BegOn, M., HARpeR, J. L. & TOwSend, C. R. (1990) Ecology, individuals, populations and communities. 2nded. BlackwellSci. Publ., Boston.","BejA-PeReIRA,A., OLIVeIRA, R., ALVeS, P. C., SCHwARTZ, M. K. & LuIkART, G. (2009) Advancing ecologicalunderstandingsthroughtechnologicaltransformationsinnoninvasivegenetics. Molecular Ecology Resources 9: 1279-1301. doi: 10.1111/j.1755-0998.2009.02699.x","BIRdLIfeInTeRnATIOnAL (2009) Aquilaheliaca. In: 2009 IUCNRedListofThreatenedSpeciesIUCN (www.iucnredlist.org).","BOuRke, B. P. & DAwSOn, D. A. (2006) Fifteenmicrosatellitelocicharacterizedinthegolden eagleAquilachrysaetosAccipitridae, Aves. MolecularEcologyNotes 6: 1047-1050. doi: 10.1111/j.1471-8286.2006.01429.x","BuSCH, J. D., KATZneR, T. E., BRAgIn, E. & KeIM, P. (2005) Tetranucleotidemicrosatellites forAquilaandHaliaetuseagles. MolecularEcologyNotes 5: 39-41. doi: 10.1111/j.1471- 8286.2004.00823.x","deL HOyO, J., ELLIOTT, A. & SARgATAL, J. (1994) Handbook of the Birds of the World. Vol. 2. New WorldVulturestoGuineafowl. LynxEdicions, Barcelona. 638 pp.","DOnAZAR, J. A., PALACIOS, C. J., GAngOSO, L., CeBALLOS, O., GOnZALeZ, M. J. & HIRALdO, F. (2002) Conservationstatusandlimitingfactorsintheendangeredpopulationof EgyptianVulture (Neophronpercnopterus) intheCanaryIslands. BiologicalConservation 107: 89-97.","DuRIeZ, O., SACHeT, J.-M., MenOnI, E., PIdAnCIeR, N., MIgueL, C. & TABeRLeT, P. (2007) PhylogeographyofthecapercaillieinEurasia: whatistheconservationstatusinthePyr- eneesandCantabrianMounts? ConservationGenetics 8: 513-526. doi: 10.1007/s10592- 006-9165-2","FeRReR, M. (1993) Juveniledispersalbehaviourandnatalphilopatryofalong-livedraptor, theSpanishImperialEagleAquilaadalberti. Ibis 135: 132-138.","FeRReR, M. (2001) TheSpanishImperialEagle. LynxEdicions, Barcelona, 224 pp.","FeRReR, M. & BISSOn, I. (2003) Ageandterritory-qualityeffectsonfecundityintheSpanish ImperialEagle. Auk 120: 180-186.","FeRReR, M. & CALdeROn, J. (1990) TheSpanishImperialEagleAquilaadalbertiC. L. Brehm 1861 inDonanaNationalParkSouthWestSpain: Astudyofpopulationdynamics. Biological Conservation 51: 151-161.","FeRReR, M. & DOnAZAR, J. A. (1996). Densitydependentfecunditybyhabitatheterogeneity inanincreasingpopulationofSpanishimperialeagles. Ecology 77: 69-74.","FRIdOLfSSOn, A. K. & ELLegRenH. (1999) Asimpleanduniversalmethodformolecularsexingofnon-ratitebirds. JournalofAvianBiology 3 0: 116-121.","GeMMeLL, N. & AkIyAMA, S. (1996) AnefficientmethodfortheextractionofDNAfrom vertebratetissue. TrendsinGenetics 12: 338-339.","GOnZALeZ, L. M. & MARgALIdA, A. (eds) (2008) Conservation biology of the Spanish Imperial Eagle. OrganismoAutonomoParquesNacionales, MinisteriodeMedioAmbientey MedioMarinoyRural, Madrid, 604 pp.","GOnZALeZ, L. M., MARgALIdA, A., MANOSA, S., SAnCHeZ, R., ORIA, J., MOLInA, J. I., CALdeRA, J., ARAndA, A. & PRAdA, L. (2007) Causesandspatio- temporalvariationsofnon-nat- uralmortalityinthevulnerableSpanishImperialEagleAquilaadalbertiduringa recoveryperiod. Oryx 41: 495-502. doi: 10.1017/S0030605307414119","GueRRInI, M. & BARBAneRA, F. (2009) NoninvasivegenotypingoftheRed-LeggedPartridge (Alectorisrufa, Phasianidae): Semi- nestedPCRofmitochondrialDNAfromfeces Biochemical Genetics 47: 873-883. doi: 10.1007/s10528-009-9288-5","HAILeR, F., HeLAndeR, B., FOLkeSTAd, A. O., GAnuSeVICH, S. A., GARSTAd, S., HAuff, P., KO- Ren, C., MASTeROV, V. B., NygARd, T., RudnICk, J. A., SHIRAkI, S., SkARpHedInSSOn, K., VOLke, V., WILLe, F. & VILA, C. (2007) Phylogeographyofthewhite-tailedeagle, ageneralistwithlargedispersalcapacity. JournalofBiogeography 34: 1193-1206. doi: 10.1111/j.1365-2699.2007.01697.x","HOgAn, F. E., COOke, R., BuRRIdge, C. P. & NORMAn, J. A. (2008) Optimizingtheuseof shedfeathersforgeneticanalysis. MolecularEcologyResources 8: 561-567. doi: 10.1111/ j.1471-8286.2007.02044.x","HORVATH, M. (2009) Habitat- and prey-selection of Imperial Eagles (Aquila heliaca). Ph. D. thesis EotvosLorandUniversity, Budapest.","HORVATH, M. & KOVACS, A. (2009) Imperial Eagle (Aquila heliaca Savigny, 1809). Pp. 231- 234. In: CSoRgo, T., KARCZA, Z., HALMOS, G., MAgyAR, G., GyuRACZ, J., SZep, T., BAnkO- VICS, A., SCHMIdT, A. & SCHMIdT, E. (eds): Magyarmadarvonulasiatlasz. (Hungarian BirdMigrationAtlas). KossuthKiado, Budapest. [InHungarianwithEnglishsum- mary]","HORVATH, M., MARTIneZ-CRuZ, B., NegRO, J. J., KALMAR, L. & GOdOy, J. A. (2005) An over- lookedDNAsourcefornon-invasivegeneticanalysisinbirds. JournalofAvianBiology 36: 84-88. doi: 10.1111/j.0908-8857.2005.03370.x","HORVATH, M., SZITTA, T., FATeR, I., KOVACS, A., DeMeTeR, I., FIRMAnSZky, G. & BAgyuRA, J. (2011) PopulationdynamicsofImperialEaglesinHungarybetween 2001 and 2009. Acta Zoologica Bulgarica Suppl. 3: 61-70.","HuI, W., GeL, Y. R. & GASTwIRTH, J. L. (2008) lawstat: An R Package for law, public policy and biostatistics. Journal of Statistical Software 28: 1-26.","IdAgHdOuR, Y., BROdeRICk, D. & KORRIdA, A. (2003) FaecesasasourceofDNAformolecular studiesinathreatenedpopulationofgreatbustards. ConservationGenetics 4: 789-792.","JACOB, G., DeBRunneR, R., GugeRLI, F., SCHMIdT, B. & BOLLMAnn, K. (2010) Fieldsurveys ofcapercaillie (Tetraourogallus) intheSwissAlpsunderestimatedlocalabundance ofthespeciesasrevealedbygeneticanalysesofnon-invasivesamples Conservation Genetics 11: 33-44. doi: 10.1007/s10592-008-9794-8","KenwARd, R. E., WALLS, S. S., HOddeR, K. H., PAHkALA, M., FReeMAn, S. N. & SIMpSOn, V. R. (2000) Theprevalenceofnon-breedersinraptorpopulations: evidencefromrings, radio- tagsandtransectsurveys. Oikos 91: 271-279.","KIRk, D. A. & HySLOp, C. (1998) PopulationstatusandrecenttrendsinCanadianraptors: a review. BiologicalConservation, 83: 91-118., doi: 10.1016/S0006-3207(97)00051-7","KOHn, M. H., YORk, E. C., KAMRAdT, D. A., HAugHT, G., SAuVAjOT, R. M. & WAyne, R. K. (1999) Estimatingpopulationsizebygenotypingfaeces. ProceedingsoftheRoyalSociety B: Biological Sciences 266: 657-663.","LOpeZ-LOpeZ, P., FeRReR, M., MAdeRO, A., CASAdO, E. & MCGRAdy, M. (2011) Solvingmaninducedlarge-scaleconservationproblems: TheSpanishImperialEagleandpower lines. PLoSONE 6.3: e17196. doi: 10.1371/journal.pone.0017196","MARgALIdA, A., GOnZALeZ, L. M., SAnCHeZ, R., ORIA, J. & PRAdA, L. (2007) Parental behav- iourofSpanishImperialEaglesAquilaadalberti: sexualdifferencesinamoderately dimorphicraptor: Thesexesmakesignificantlydifferentcontributionsinthetasks ofnest- building, incubationandfoodprovisioningtochicks. BirdStudy 54: 112-119. doi: 10.1080/00063650709461462","MARTIneZ-CRuZ, B., DAVId, V. A., GOdOy, J. A., NegRO, J. J., O'BRIen, S. J. & JOHnSOn, W. E. (2002) EighteenpolymorphicmicrosatellitemarkersforthehighlyendangeredspanishimperialeaglesAquilaadalbertiandrelatedspecies. MolecularEcologyNotes 2: 323-326. doi: 10.1046/j.1471-8278 .2002.00231.x","MARTIneZ-CRuZ, B., GOdOy, J. A. & NegRO, J. J. (2007) Populationfragmentationleadsto spatialandtemporalgeneticstructureintheendangeredSpanishimperialeagle. Molecular Ecology 16: 477-486. doi: 10.1111/j.1365-294X.2007.03147.x","MARTInkOVA, N. & SeARLe, J. B. (2006) AmplificationsuccessrateofDNAfrommuseum skincollections: acasestudyofstoatsfrom 18 museums. MolecularEcologyNotes 6: 1014-1017. doi: 10.1111/j.1471-8286.2006.01482.x","MILLeR, J. M., HALLAgeR, S., MOnfORT, S. L., NewBy, J., BISHOp, K., TIdMuS, S. A., BLACk P., HOuSTOn, B., MATTHee, C. A. & FLeISCHeR, R. C. (2011) Phylogeographicanalysisof nuclearandmtDNAsupportssubspeciesdesignationsintheostrich (Struthiocamelus). ConservationGenetics 12: 423-431. doi: 10.1007/s10592-010-0149-x","ORTegA, E., MAnOSA, S., MARgALIdA, A., SAnCHeZ, R., ORIA, J. & GOnZALeZ, L. M. (2009) A demographicdescriptionoftherecoveryofthevulnerableSpanishImperialEagle Aquilaadalberti. Oryx 43: 113-121. doi: 10.1017/S0030605307991048","PeAkALL, R. & SMOuSe, P. E. (2006) GENALEX 6: geneticanalysisinexcel. MolecularEcology Notes 6: 288-295. doi: 10.1111/j.1471-8286.2005.01155.x","R DeVeLOpMenT CORe TeAM (2011) R: A language and environment for statistical computing. RFoundationforStatisticalComputing,Vienna, Austria. http://www.R-project.org, doi: ISBN 3-900051-07-0","ReAL, J. & MANOSA, S. (1997) DemographyandconservationofWesternEuropeanBonelli' s EagleHieraaetusfasciatuspopulations. BiologicalConservation 79: 59-66.","RudnICk, J. A., KATZneR, T. E., BRAgIn, E. A. & DewOOdy, J. A. (2007) Speciesidentification ofbirdsthroughgeneticanalysisofnaturallyshedfeathers. MolecularEcologyNotes 7: 757-762. doi: 10.1111/j.1471-8286.2007.01796.x","RudnICk, J. A., KATZneR, T. E., BRAgIn, E. A. & DewOOdy, J. A. (2008) Anon-invasivegenetic evaluationofpopulationsize, natalphilopatry, androostingbehaviorofnonbreedingEasternImperialEaglesAquilaheliacainCentralAsia. ConservationGenetics 9: 667-676. doi: 10.1007/s10592-007-9397-9","RudnICk, J. A., KATZneR, T. E., BRAgIn, E. A., RHOdeS, O. E. & DewOOdy, J. A. (2005) Us- ingnaturallyshedfeathersforindividualidentification, geneticparentageanalyses, andpopulationmonitoringinanendangeredEasternimperialeagleAquilaheliaca populationfromKazakhstan. MolecularEcology 14: 2959-2967. doi: 10.1111/j.1365- 294X.2005.02641.x","SeBeR, G. A. F. (1982) The estimation of animal abundance and related parameters. 2nd ed., EdwardArnold, LondonandNewYork, 654 pp.","SekI, S. (2006) Applicationofmoltedfeathersasnoninvasivesamplestostudiesonthegeneticstructureofpigeons (Aves: Columbidae). JournalofForestResearch 11: 125-129. doi: 10.1007/s10310-005-0194-3","SLOAne, M. A., SunnuCkS, P., ALpeRS, D., BeHeRegARAy, L. B. & TAyLOR, A. C. (2000) Highly reliablegeneticidentificationofindividualnorthernhairy-nosedwombatsfromsingleremotelycollectedhairs: afeasiblecensusingmethod. MolecularEcology 9: 1233- 1240. doi: 10.1046/j.1365-294x.2000.00993.x","SMART, J., AMAR, A., SIM, I. M. W., ETHeRIdge, B., CAMeROn, D., CHRISTIe, G. & WILSOn, J. D. (2010) Illegalkillingslowspopulationrecoveryofare-introducedraptorofhigh conservationconcern - TheRedKiteMilvusmilvus. BiologicalConservation 143: 1278- 1286.","TABeRLeT, P., CAMARRA, J. J. & GRIffIn, S. (1997) Non-invasivegenetictrackingoftheendangeredPyreneanbrownbearpopulation. MolecularEcology 6: 869-876.","TABeRLeT, P., WAITS, L. P. & LuIkART, G. (1999) Non-invasivegeneticsampling: lookbefore you leap. Trends in Ecology, Ethology and Evolution 14: 323-327. doi: 10.1016/S0169- 5347(99)01637-7","VALI, U., DOMBROVSkI, V., TReInyS, R., BeRgMAnIS, U., DAROCZI, SZ. J., DRAVeCky, M., IVAnOVSkI, V., LOnTkOwSkI, J., MACIOROwSkI, G., MeyBuRg, B., MIZeRA, T., ZeITZ, R. & ELLegRen, H. (2010) WidespreadhybridizationbetweentheGreaterSpottedEa- gleAquilaclangaandtheLesserSpottedEagleAquilapomarina (Aves: Accipitri- formes). Biological Journal of the Linnean Society 100: 725-736. doi: 10.1111/j.1095- 8312.2010.01455.x","VAnOOSTeRHOuT, C., HuTCHInSOn, W. F., WILLS, D. P. M. & SHIpLeyP. (2004) micro- checker: softwareforidentifyingandcorrectinggenotypingerrorsinmicrosatellitedata. Molecular Ecology Notes 4: 535-538. doi: 10.1111/j.1471-8286.2004.00684.x","VILI, N., CHAVkO, J., SZABO, K., KOVACS, SZ., HORnung, E., KALMAR, L. & HORVATH, M. (2009b) GeneticstructureoftheImperialEagle (Aquilaheliaca) populationinSlovakia. Slovak Raptor Journal 3: 21-28.","VILI, N., HORVATH, M., KOVACS, SZ., CHAVkO, J., HORnung, E. & KALMAR L. (2009a) Alternativ mintavetelimodszergyakorlatialkalmazhatosagamadargenetikaivizsgalatokban: parlagisasokivarmeghatarozasa, mikroszatellitakonalapuloegyediazonositasaes mtDNS-enek vizsgalata. Magyar Allatorvosok Lapja 131: 426-435. [In Hungarian]","VILI, N., NeMeSHAZI, E., KOVACS, SZ., HORVATH, M., KALMAR, L. & SZABO, K. (2013) Factors affectingDNAqualityinfeathersusedfornon-invasivesampling. JournalofOrnithology 154: 587-595. doi: 10.1007/s10336-013-0932-9","WAITS, L. P. LuIkART, G. & TABeRLeT, P. (2001) Estimating the probability of identity among genotypesinnaturalpopulations: cautionsandguidelines. MolecularEcology 10: 249- 256. doi: 10.1046/j.1365-294X.2001.01185.x","WAkAMIyA , S. M. & ROy, C. L. (2009) Useofmonitoringdataandpopulationviabilityanalysistoinformreintroductiondecisions: PeregrinefalconsintheMidwesternUnited States. BiologicalConservation 142: 1767-1776. doi: 10.1016/j.biocon.2009.03.015","WeIgMAnn, H.-D. (1968) Reductionofdisulfidebondsinkeratinwith 1,4-dithiothreitol. I. Kinetic Investigation. Journal of Polymer Science Part A-1: Polymer Chemistry 6: 2237- 2253. doi: 10.1002/pol.1968.150060819","WHITfIeLd, D. P FIeLdIng, A. H., MCLeOd, D. R. A. & HAwORTH, P. F. (2004) Modelling the effectsofpersecutiononthepopulationdynamicsofGoldenEaglesinScotland. Biological Conservation 119: 319-333."]}

Published
2013
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27. On the sediment volume of colloidal aggregates 1. A fractal approach to the problem.

Author

Kilian, H.-G., Lagaly, G., Hummel, K., Schurz, J., Zrinyi, M., Kabai-Faix, M., and Horkay, F.

Abstract

A new approach based on the fractal geometry of random aggregates is used to describe the concentration of the sediment formed by the settling of colloidal aggregates. It is predicted that the sediment concentration depends not only on the adhesion forces, but also on the size of the settling particles. Experimental results performed on iron(III) hydroxide sols qualitatively support our ideas. [ABSTRACT FROM AUTHOR]

Published
1988
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28. Tree-Based Methods as an Alternative to Logistic Regression in Revealing Risk Factors of Crib-Biting in Horses.

Author

Nagy, Krisztina, Reiczigel, Jenő, Harnos, Andrea, Schrott, Anikó, and Kabai, Péter

Subjects
ANIMAL behavior, HORSES, LOGISTIC regression analysis, STEREOTYPIC movement disorder, MEDICAL logic, VETERINARY medicine, HEALTH risk assessment, MATHEMATICAL statistics
Abstract

Abstract: Determining the risk factors might help in designing prevention of crib-biting. Logistic regression is a commonly used statistical method for finding risk factors, but tree-based methods are also getting more popular. An important difference between these two statistical approaches is that logistic regression makes a number of assumptions about the underlying data, whereas tree-based methods do not. Another difference is that logistic regression can be used to derive odds ratios for the significant risk factors, whereas tree-based methods create a tree where the ramifications represent the risk factors. The probability of occurrence is assigned to each end of branch in the tree. Data of horses used for noncompetition purposes were analyzed with three statistical approaches: logistic regression, classification tree, and conditional inference tree methods. By this, we compared the advantages and disadvantages of these statistical methods. No difference was found between the two tree-based methods regarding the structure and prediction accuracy of the trees. Compared to them, logistic regression revealed fewer risk factors, and also the number of the stereotypic horses classified correctly by the model was less. The representation of the tree-based methods is closer to medical reasoning and also high-order interaction of the risk-factors can easily be visualized. Our results suggest that tree-based methods can be a new alternative in revealing risk factors, even if used alone or together with logistic regression. [Copyright &y& Elsevier]

Published
2010
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29. The path forward in Hungarian neuroscience

Author

Antal, M., primary, Buzsáki, G., additional, Czéh, G., additional, Gaál, G., additional, Gulyás, B., additional, Horváth, Z., additional, Jakab, R., additional, Kabai, P., additional, Kiss, J., additional, Kocsis, B., additional, Komoly, S., additional, Kovách, J., additional, Lendvay, J., additional, Léránth, C., additional, Mezey, E., additional, Molná, Z., additional, Seregi, A., additional, Soltész, I., additional, Somogyi, P., additional, Toth, T., additional, Urbän, L., additional, and Vadász, C., additional

Published
1991
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31. New Horizons for Malaysia's Landscape Education: Gate Project Across Cultures and Continents

Author

Hussein, Mohd Kher and Kabai, Robert

Abstract

GATE is an Erasmus Mundus mobility project funded by the European Commission (2012-2016). This programme has opened up an opportunity to the Asian university students/staff to further study in European countries and to enhanced university partnerships. GATE is quite new, thus landscape students/staff need to grasp this opportunity for their better future prospect. This paper highlights the GATE project possibility in enriching the environment for landscape study and contributing to the academic excellence of Malaysia's landscape education. GATE project acts as a new horizon in landscape education, enhances the skills, qualifications and benefits linguistically and culturally the respective universities.

Published
2015
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32. Packing regular triplets of circles on a sphere

Author

Fowler, P.W, Tarnai, T, and Kabai, S

Abstract

This article examines how 3Nnon-overlapping equal circles forming Ntriplets must be packed on a sphere to ensure that the angular diameter of the circles will be as large as possible. Furthermore, this problem is solved under the constraint that, within each triplet, the circle centres lie at the vertices of an equilateral triangle inscribed into a great circle of the sphere. Computer-generated solutions to this optimization problem are presented for N2–7 triplets. The configurations obtained are characterized as compounds (nolids) of equilateral triangles.

Published
2005
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33. Preparation of magnetic polystyrene latex via the miniemulsion polymerization technique

Author

Csetneki, I., Faix, M. Kabai, Szilágyi, A., Kovács, A. L., Németh, Z., and Zrinyi, M.

Abstract

Magnetic iron oxide (magnetite, Fe3O4) nanoparticles were encapsulated with polystyrene to give a stable water‐based magnetic polymer latex, using the miniemulsion polymerization technique. The resulting magnetic latexes were characterized with transmission electron microscopy (TEM), dynamic light scattering (DLS), vibrating sample magnetometer measurements (VSM), and 57Fe Mössbauer spectroscopy measurements. TEM revealed that all magnetite nanoparticles were embedded in the polymer spheres, leaving no empty polystyrene particles. The distribution of magnetite particles within the polystyrene spheres was inhomogeneous, showing an uneven polar appearance. The DLS measurements indicated a bimodal size distribution for the particles in the latexes. According to our magnetometry and Mössbauer spectroscopy data, the encapsulated magnetite particles conserve their superparamagnetic feature when they are separated in the polymer matrix. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 4802–4808, 2004

Published
2004
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34. Packing of regular tetrahedral quartets of circles on a sphere

Author

Tarnai, T, Fowler, P.W, and Kabai, S

Abstract

How must 4Nnonoverlapping equal circles forming Nquartets be packed on a sphere so that the angular diameter of the circles will be as large as possible under the constraint that, within each quartet, the circle centres lie at the vertices of a regular tetrahedron? Computergenerated solutions to this optimization problem are presented for N 1–8 quartets. A check of Danzerian rigidity of the computed packings is made in each case. The configurations so obtained are characterized as compounds of regular tetrahedra, some well known and some newly defined.

Published
2003
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35. Preparation and Characterization of Surface-Modified Silica-Nanoparticles

Author

Tolnai, Gy., Csempesz, F., Kabai-Faix, M., Kalman, E., Keresztes, Zs., Kovacs, A. L., Ramsden, J. J., and Horvolgyi, Z.

Abstract

Stöber silica particles having diameters of ca. 100 and ca. 200 nm were prepared and silylated using trimethylsilyl N,N-dimethylcarbamate, achieving a range of surface coverage by trimethylsilyl groups by varying the amounts of silylating agent used. The efficacy of silylation was characterized in terms of hydrophobicity of the particles which was assessed by film balance investigations at water−air interfaces and additionally by imaging the long- and short-range structures of silica particulate layers at water−air interfaces and on mica supports by using Brewster-angle and atomic force microscopies.

Published
2001

36. Ex situ protection of the European mudminnow (Umbra krameri Walbaum, 1792): Spawning substrate preference for larvae rearing under controlled conditions

Author

Kucska Balázs, Kabai Péter, Hajdú Juraj, Várkonyi Levente, Varga Dániel, Müllerné-Trenovszki Magdolna, Tatár Sándor, Urbányi Béla, Zarski Daniel, and Müller Tamás

Subjects
Umbridae, captive breeding, endemic species, conservation, larvae diet, Biology (General), QH301-705.5
Abstract

Captive breeding programs of endangered fish species, such as the European mudminnow Umbra krameri, are essential for population restoration. To improve captive spawning and larvae rearing under controlled conditions, two experiments were carried out. In the first, the spawning substrate preference was tested in triplicate, where five different types of artificial surface were provided for mudminnow pairs:(i)sand, (ii)artificial plants, (iii)gravel, (iv)sand + artificial plants and(v)gravel + artificial plants. All fish preferred the gravel + artificial plant combination, which indicates that this type of surface could be the most appropriate for spawning in captivity. In the second trial, three feeding protocols were tested in triplicate under controlled conditions. In the first treatment fish were fed exclusively with Artemia nauplii; in the second treatment fish were fed with Artemiafor the first ten days then Artemia was gradually replaced with dry feed; for the third group the transition period started after 5 days of Artemia feeding. Although the survival rate of larvae could be maintained at a high level in some of the feeding protocols, a strong decrease in the growth rate was obvious in all diets containing dry food, which means that live food is essential for the first three weeks of mudminnow larvae rearing.

Published
2016
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37. Androgenic alopecia may have evolved to protect men from prostate cancer by increasing skin exposure to ultraviolet radiation.

Author

Kabai, Peter

Subjects
BALDNESS, PROSTATE cancer, EFFECT of radiation on skin, ULTRAVIOLET radiation, HAIR diseases
Abstract

Summary: Androgenic alopecia affects populations adapted to colder climate, and individuals at an age and hormonal status susceptible to prostate cancer. Male pattern baldness enhances absorption of UV radiation on the top of the head, an area directly exposed to sunlight during everyday activities. Ultraviolet radiation is reported to reduce the risk of advanced prostate cancer. Here I propose that progression of androgenic alopecia rather than being a risk factor is a finely tuned mechanism evolved to protect against prostate cancer. [Copyright &y& Elsevier]

Published
2008
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38. Loading, strain and stress conditions of autobus frame junction points

Author

Borbis, L., Kabai, I., and Zsary, A.

Abstract

The increasing requirements in connection with the vehicle structure highlight the better utilisation of material, energy saving and reliability. The theoretical calculation of light structure construction has recently been significantly developed but experimental work is nevertheless of great importance. Through our research laboratory, we joined in the development work of the IKARUS Body and Vehicle Factory. The aim is to develop modern vehicle structures. In parallel with finite element calculations, we examined the deformation and stress fields under different loads in the vicinity of the junction points of the running gears by optical active coating and reflection polariscope. Furthermore, by fatigue tests using models in accordance with the true frame. The tests make it possible to qualify the present construction and to take the course of the development.

Published
1991
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40. Subtelencephalic visual discrimination in selected lines of Japanese quail

Author

Kabai, Peter and Kovach, Joseph K.

Abstract

WE studied visual discrimination capabilities of the avian brain stem in genetic lines of Japanese quail artificially selected for unconditional approach preference for blue, red or an achromatic pattern stimulus. Complete telencephalectomy did not abolish approach behavior and visual discrimination. Our data indicate that visual feature extraction and motor coordination related to early approach preferences in birds may be mediated by brain stem and thalamic circuitries which do not require input from higher level visual and motor regions.

Published
1993

44. Domestication affects exploratory behaviour of pikeperch (Sander lucioperca L.) during the transition to pelleted food.

Author

Molnár T, Csuvár A, Benedek I, Molnár M, and Kabai P

Subjects
Animals, Aquaculture, Body Size, Predatory Behavior, Animal Feed, Domestication, Exploratory Behavior, Perches growth & development
Abstract

Genetic selection for body size during domestication of animal species can inadvertently affect a number of physiological and behavioural traits. The pace-of-life syndrome (POLS) hypothesis predicts that domestication in an artificial environment lacking predators and providing abundant resources prefers proactive individuals with strong feeding motivation, high levels of aggression and risk taking, with low hypothalamus-pituitary-adrenal (HPA) axis responsiveness. In the present experiment we weaned fingerling pike-perch from live feed and habituated them to formulated feed. We recorded the number of weeks needed for the fish to accept pellets, their body length at the age of 100 days, their boldness in a novel object test and their HPI axis responsiveness. Individuals accepting the artificial feed within the first week grew larger than fish habituating later; therefore early weaners would be kept and bred in routine aquaculture procedures. Contrary to predictions of POLS hypothesis, fish weaning earlier and thus growing faster were less bold and had higher HPI axis responsiveness than fish accepting the pellets later or never. As live feed is preferred to artificial pellets, less competitive individuals may switch to pellets earlier. Inadvertent selection for stress sensitive fish may have an effect on production in aquaculture as well as on natural population after intensive restocking.

Published
2018
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46. Context-dependent prey avoidance in chicks persists following complete telencephalectomy.

Author

Zachar G, Schrott A, and Kabai P

Subjects
Animals, Color, Social Behavior, Telencephalon physiology, Telencephalon surgery, Avoidance Learning physiology, Behavior, Animal physiology, Chickens, Discrimination Learning physiology, Predatory Behavior physiology, Telencephalon pathology
Abstract

Young naive domestic chicks readily attack green insects and avoid insects painted red but show no discrimination of the same colours when applied to fruit-like objects, a discrimination that has been depicted as context-dependent preference. To study the neural representation of such preference we performed bilateral telencephalectomy on 1-day-old domestic chicks and tested them on an unlearned prey discrimination paradigm. Here we show that following complete decerebration, young domestic chicks preferentially peck at red fruit versus red insects and tend to choose green insects over green fruit indistinguishably from unoperated chicks. The present study provides the first direct evidence that sophisticated context-dependent, unlearned colour preference is processed by subtelencephalic areas of an amniote species.

Published
2008
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47. Myopia risk factors.

Author

Kabai P and Bakk J

Subjects
Dose-Response Relationship, Radiation, Humans, Myopia epidemiology, Myopia physiopathology, Odds Ratio, Prevalence, Risk Factors, Severity of Illness Index, Myopia etiology, Parturition, Photoperiod, Seasons
Published
2008
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48. ABCD: a functional database for the avian brain.

Author

Schrott A and Kabai P

Subjects
Animals, Birds, Brain anatomy & histology, Brain physiology, Databases, Factual statistics & numerical data, Information Services
Abstract

Here we present the first database developed for storing, retrieving and cross-referencing neuroscience information about the connectivity of the avian brain. The Avian Brain Circuitry Database (ABCD) contains entries about the new and old terminology of the areas and their hierarchy, data on connections between brain regions, as well as a functional keyword system linked to brain regions and connections. Data were collected from the primary literature and textbooks, and an online submission system was developed to facilitate further data collection directly from researchers. The database aims to help spread the results of avian connectivity studies, the recently revised nomenclature and also to provide data for brain network research. ABCD is freely available at http://www.behav.org/abcd.

Published
2008
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49. Inhibiting effect of D1, but not D2 antagonist administered to the striatum on retention of passive avoidance in the chick.

Author

Kabai P, Stewart MG, Tarcali J, and Csillag A

Subjects
Animals, Benzazepines administration & dosage, Chickens, Dopamine Antagonists administration & dosage, Sulpiride administration & dosage, Avoidance Learning drug effects, Benzazepines pharmacology, Corpus Striatum drug effects, Dopamine Antagonists pharmacology, Receptors, Dopamine D1 antagonists & inhibitors, Receptors, Dopamine D2 drug effects, Retention, Psychology drug effects, Sulpiride pharmacology
Abstract

The avian lobus parolfactorius, equivalent to the medial striatum (caudate-putamen) of mammals, has been shown to be of crucial importance in passive avoidance training in day-old domestic chicks, where the aversive stimulus is the bitter tasting substance methylanthranilate. Here we report that the specific D1 antagonist SCH23390, injected into the lobus parolfactorius of day-old chicks (Gallus domesticus) prior to training, impaired performance on testing 30min post-training at low doses (0.5 and 25nmol). Sulpiride, a D2 antagonist, had no significant effect on performance in comparable doses. The early D1 activation may signify an essential mechanism leading to storage itself or to the canalisation of the relevant association to a permanent store.

Published
2004
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50. Neural correlates of genetically determined and acquired color preferences in quail chicks.

Author

Kabai P, Kovach J, and Vadasz C

Subjects
Animals, Autoradiography, Brain metabolism, Color, Coturnix genetics, Deoxyglucose metabolism, Functional Laterality, Genotype, Organ Specificity, Tritium, Behavior, Animal physiology, Brain physiology, Coturnix physiology
Abstract

The uptake of tritiated 2-deoxyglucose (2-DG) was examined in brains of artificially selected and unselected control quail, in relation to genetically and environmentally variable early approach preferences of a colored stimulus. The data indicated high labeling in the tectofugal and low labeling in the thalamofugal projection systems in birds exhibiting preference for the light wavelength characteristics of the stimulus in independently tested choice situations. The differential labeling was observed regardless whether the stimulus preference was genetic or environmental in origin (i.e. whether it was exhibited by artificially selected and experientially naive or by unselected and imprinted control chicks). Chicks responding to the stimulus after prior imprinting experiences also exhibited high labeling in the intermediate medial portions of the neostriatum and hyperstriatum ventrale.

Published
1992
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