{"id":757,"date":"2017-05-31T14:25:56","date_gmt":"2017-05-31T12:25:56","guid":{"rendered":"http:\/\/cke.cz\/?p=757"},"modified":"2017-08-07T14:02:37","modified_gmt":"2017-08-07T12:02:37","slug":"facing-a-clever-predator-demands-clever-responses-red-backed-shrikes-lanius-collurio-vs-eurasian-magpies-pica-pica","status":"publish","type":"post","link":"http:\/\/cke.cz\/cs_CZ\/2017\/05\/31\/facing-a-clever-predator-demands-clever-responses-red-backed-shrikes-lanius-collurio-vs-eurasian-magpies-pica-pica\/","title":{"rendered":"Facing a Clever Predator Demands Clever Responses - Red-Backed Shrikes (Lanius collurio) vs. Eurasian Magpies (Pica pica)"},"content":{"rendered":"<h2>2016<\/h2>\n<h4><a href=\"http:\/\/cke.cz\/2017\/05\/30\/michaela-syrova\/\">Michaela Syrov\u00e1<\/a>, Michal N\u011bmec, <a href=\"http:\/\/cke.cz\/2017\/05\/30\/petr-vesely\/\">Petr Vesel\u00fd<\/a>, Eva Landov\u00e1, <a href=\"http:\/\/cke.cz\/2017\/05\/30\/roman-fuchs\/\">Roman Fuchs<\/a><\/h4>\n<h3><a href=\"https:\/\/doi.org\/10.1371\/journal.pone.0159432\" target=\"_blank\" rel=\"noopener noreferrer\">DOI: 10.1371\/journal.pone.0159432<\/a><\/h3>\n<hr \/>\n<p>P\u0159e\u017e\u00edt v divo\u010din\u011b nen\u00ed jen tak. Ka\u017ed\u00fd den se tu st\u0159et\u00e1vaj\u00ed dravci se svou ko\u0159ist\u00ed a jejich z\u00e1jmy jsou naprosto odli\u0161n\u00e9. Dravec chce n\u011bco ulovit a ud\u011bl\u00e1 pro to v\u0161echno, co m\u016f\u017ee. Stejn\u011b tak ko\u0159ist se za ka\u017edou cenu sna\u017e\u00ed uloven\u00ed dravcem vyhnout. Nen\u00ed to ale jednoduch\u00e9. Nap\u0159\u00edklad ko\u0159ist \u010dasto \u010del\u00ed r\u016fzn\u00fdm typ\u016fm dravc\u016f. V takov\u00e9m p\u0159\u00edpad\u011b se m\u016f\u017ee vyh\u00fdbat m\u00e9n\u011b nebezpe\u010dn\u00fdm dravc\u016fm a naopak se soust\u0159ed\u00ed na specializovan\u00e9 dravce, kte\u0159\u00ed c\u00edlen\u011b \u00fato\u010d\u00ed pr\u00e1v\u011b na tuto konkr\u00e9tn\u00ed ko\u0159ist. A obrana p\u0159ed r\u016fzn\u00fdmi typy dravc\u016f se m\u016f\u017ee li\u0161it. <a href=\"http:\/\/www.prf.jcu.cz\/veda\/nase-objevy\/utoky-chytrejsiho-predatora-vyzaduji-dumyslnejsi-obranu.html\" target=\"_blank\" rel=\"noopener\">\u010ct\u011bte v\u00edce na webu P\u0159F JU.<\/a><\/p>\n<p><em><strong>Anglick\u00fd abstrakt:<\/strong><\/em><\/p>\n<p>Red-backed shrikes <em>(Lanius collurio)<\/em> behave quite differently towards two common nest predators. While the European jay <em>(Garrulus glandarius)<\/em> is commonly attacked, in the presence of the Eurasian magpie <em>(Pica pica),<\/em> shrikes stay fully passive. We tested the hypotheses that this passive response to the magpie is an alternative defense strategy. Nesting shrikes were exposed to the commonly attacked European kestrel <em>(Falco tinnunculus)<\/em> in a situation in which i) a harmless domestic pigeon, ii) a commonly attacked European jay, and iii) a non-attacked black-billed magpie are (separately) presented nearby. The kestrel dummy presented together with the magpie dummy was attacked with a significantly lower intensity than when it was presented with the other intruders (pigeon, jay) or alone. This means that the presence of the magpie inhibited the shrike\u2019s defense response towards the other intruder. These results support our previous hypotheses that shrikes use an alternative defense strategy in the magpie\u2019s presence. We hypothesize that the magpie is able to associate the active defense of the shrikes with the close proximity of a nest and that shrikes try not to draw the magpie\u2019s attention to the nest. The reason why this strategy is not used against the jay remains unanswered as jays as well as magpies show very similar cognitive and foraging skills enabling them to individuate the nest presence according to active parental defense.<\/p>\n<hr \/>\n<h2>Zp\u011bt na <a href=\"http:\/\/cke.cz\/publication\/scientific-papers\/\">v\u011bdeck\u00e9 \u010dl\u00e1nky<\/a>.<\/h2>\n","protected":false},"excerpt":{"rendered":"<h2>2016<\/h2>\n<h4><a href=\"http:\/\/cke.cz\/2017\/05\/30\/michaela-syrova\/\">Michaela Syrov\u00e1<\/a>, Michal N\u011bmec, <a href=\"http:\/\/cke.cz\/2017\/05\/30\/petr-vesely\/\">Petr Vesel\u00fd<\/a>, Eva Landov\u00e1, <a href=\"http:\/\/cke.cz\/2017\/05\/30\/roman-fuchs\/\">Roman Fuchs<\/a><\/h4>\n<p>&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/cke.cz\/cs_CZ\/wp-json\/wp\/v2\/posts\/757"}],"collection":[{"href":"http:\/\/cke.cz\/cs_CZ\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/cke.cz\/cs_CZ\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/cke.cz\/cs_CZ\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/cke.cz\/cs_CZ\/wp-json\/wp\/v2\/comments?post=757"}],"version-history":[{"count":3,"href":"http:\/\/cke.cz\/cs_CZ\/wp-json\/wp\/v2\/posts\/757\/revisions"}],"predecessor-version":[{"id":1344,"href":"http:\/\/cke.cz\/cs_CZ\/wp-json\/wp\/v2\/posts\/757\/revisions\/1344"}],"wp:attachment":[{"href":"http:\/\/cke.cz\/cs_CZ\/wp-json\/wp\/v2\/media?parent=757"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/cke.cz\/cs_CZ\/wp-json\/wp\/v2\/categories?post=757"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/cke.cz\/cs_CZ\/wp-json\/wp\/v2\/tags?post=757"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}