"Community dynamics of aphidophagous predators"@en . . . "2003-01-01+01:00"^^ . . . "2007-12-01+01:00"^^ . "\u00DAsp\u011B\u0161n\u00E9 pou\u017Eit\u00ED druhu Rodolia cardinalis p\u0159i kontrole \u0161k\u016Fdce Icerya purchasi kdysi zp\u016Fsobilo, \u017Ee slun\u00E9\u010Dka za\u010Dala b\u00FDt masov\u011B pou\u017E\u00EDv\u00E1na v biologick\u00E9 kontrole. Uk\u00E1zalo se v\u0161ak, \u017Ee pred\u00E1to\u0159i jsou p\u0159i sni\u017Eov\u00E1n\u00ED populace \u0161k\u016Fdce m\u00E9n\u011B efektivn\u00ED ne\u017E parazit\u00E9. Mo\u017En\u00E1 pr\u00E1v\u011B proto se v\u011Bt\u0161ina matematick\u00FDch model\u016F popula\u010Dn\u00ED dynamiky syst\u00E9m\u016F dravec-ko\u0159ist pou\u017E\u00EDvan\u00FDch v teorii biologick\u00E9 kontroly u hmyzu t\u00FDk\u00E1 vlastn\u011B vztahu parazit-hostitel nikoli skute\u010Dn\u00E9ho vztahu dravec-ko\u0159ist. Kindlmann and Dixon (1999) navrhli hypot\u00E9zu, \u017Ee hlavn\u00EDm ur\u010Duj\u00EDc\u00EDm faktorem \u00FA\u010Dinnosti dravce pro regulaci ko\u0159isti je pom\u011Br mezi jejich genera\u010Dn\u00EDmi dobami (GTR). Tato hypot\u00E9za je siln\u011B podporov\u00E1na v\u00FDsledky laboratorn\u00EDch test\u016F. Dravci se v\u0161ak vyskytuj\u00ED nikoli samostatn\u011B, ale ve spole\u010Denstvech. Zde proto chceme uvedenou hypot\u00E9zu zobecnit na \u00FArove\u0148 spole\u010Denstev pred\u00E1tor\u016F a otestovat jej\u00ED plastnos na empirick\u00FDch datech z ter\u00E9nu. Z\u00E1rove\u0148 chceme navrhnout vysv\u011Btlen\u00ED rozd\u00EDl\u016F v dob\u011B napaden\u00ED ko\u0159isti r\u016Fzn\u00FDmi druhy pred\u00E1tor\u016F." . " ladybirds" . . "2013-06-28+02:00"^^ . "0"^^ . . . "Dynamika spole\u010Denstev afidof\u00E1gn\u00EDch pred\u00E1tor\u016F" . "population dynamics; generation time ratio; oviposition strategies; aphidophagous predators; ladybirds; aphids"@en . "The outstanding success of Rodolia cardinalis in controlling the cottony-cushion scale resulted in the widespread and haphazard introduction of ladybirds in biological control. However. predators are often less efective as biocontrol agents then parasites. This possibly accounts for why most mathematical models of arthropod predator-prey population dynamics dealt with host-parasitoid interactions rather than those involving predator-prey, sensu stricto. Kindlmann and Dixon (1999) proposed that the ratio of generation time of insect predators to that of their prey (GTR) determines the effectiveness of a natural enemy in suppressing its prey. Laboratory experiments lend strong support to this hypothesis. However, predators always occur in guilds. Therefore, in this project we aim to generalize the GTR hypothesis to the level of fuilds of predators, test it in the field and to propose an axplanation of the differences in time of arrival of different predator species in patches of prey."@en . . "S pou\u017Eit\u00EDm empirick\u00FDch dat a matematick\u00FDch model\u016F metapopula\u010Dn\u00ED dynamiky jsme uk\u00E1zali, \u017Ee myrmekofilie v\u00FDznamn\u011B ovliv\u0148uje metapopula\u010Dn\u00ED dynamiku m\u0161ic, zat\u00EDmco hustota pred\u00E1tor\u016F a jejich vz\u00E1jemn\u00E9 interakce maj\u00ED mnohem men\u0161\u00ED v\u00FDznam."@cs . "0"^^ . "1"^^ . "IAA6087301" . "11"^^ . . " oviposition strategies" . "11"^^ . . . . "http://www.isvav.cz/projectDetail.do?rowId=IAA6087301"^^ . . . "Using empirical data and mathematical models, we found that ant attendance has an important influence on aphid metapopulation dynamics, while abundance of predators and intra-guild interactions between different predator species are less significant."@en . . . . . . " aphidophagous predators" . . " generation time ratio" . "2007-02-27+01:00"^^ . "population dynamics" .