{"id":410846,"date":"2019-11-22T08:17:00","date_gmt":"2019-11-22T07:17:00","guid":{"rendered":"https:\/\/hudo.com\/si\/2019\/11\/22\/znanstveniki-odkrili-najstarejsi-dokaz-o-skupinskem-vedenju-izumrlih-zivali\/"},"modified":"2019-11-22T08:17:00","modified_gmt":"2019-11-22T07:17:00","slug":"znanstveniki-odkrili-najstarejsi-dokaz-o-skupinskem-vedenju-izumrlih-zivali","status":"publish","type":"post","link":"https:\/\/hudo.com\/si\/aktualno\/mnenja\/znanstveniki-odkrili-najstarejsi-dokaz-o-skupinskem-vedenju-izumrlih-zivali\/","title":{"rendered":"Znanstveniki odkrili najstarej\u0161i dokaz o skupinskem vedenju izumrlih \u017eivali"},"content":{"rendered":"<figure>\n\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"320\" src=\"image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" class=\"lazyload\" \/><figcaption>Fosil trilobitov (foto:Profimedia)<\/figcaption><\/figure>\n<p>Fosilna najdba iz maro\u0161ke pu\u0161\u010dave blizu mesta Zagora ka\u017ee ducat \u017eivalic velikosti kovanca, ki so v vrsti vse usmerjene v isto smer.<\/p>\n<p>&#8220;Gre za najstarej\u0161i primer tako natan\u010dno organiziranega skupinskega vedenja,&#8221; je dejal soavtor \u0161tudije Abderrazak El Albani s francoskega centra za znanstvene raziskave.<\/p>\n<p>Kot so v reviji Scientific Reports zapisali znanstveniki, je fosil izumrlih morskih bitij trilobitov skoraj v popolnem stanju.<\/p>\n<p>Trilobiti spadajo v deblo \u010dlenono\u017ecev, v katerem so tudi insekti, stonoge, pajki in raki, in so imeli tako kot njihovi sodobni sorodniki \u010dlenjeno telo in zunanji skelet.<\/p>\n<p>Biologi so sicer \u017ee zelo iz\u010drpno prou\u010dili vedenje skupin \u017eivali, kot so jate rib in ptic ali \u010dred antilop, vendar pa je o izvoru skupinskega vedenja znanega malo.<\/p>\n<p>Znanstveniki domnevajo, da najdba fosila napeljuje na dve mo\u017eni razlagi.<\/p>\n<p>Starodavne \u017eivali vrste Ampyx priscus, daljni sorodniki dana\u0161njih rakov rarogov, so se morda selile iz enega mikro okolja v drugo zaradi slabega vremena.<\/p>\n<p>Po drugi razlagi bi bil lahko urejen sprevod na dnu morja &#8220;sezonsko paritveno vedenje&#8221;, podobno migracijam spolno zrelih \u017eivali na paritvena obmo\u010dja.<\/p>\n<p>Kot je dejal glavni avtor \u010dlanka Jeana Vanniera z univerze v Lyonu, skupinsko vedenje zmanj\u0161uje tveganje za napad plenilcev, vsekakor pa ka\u017ee na &#8220;precej dovr\u0161en \u017eiv\u010dni sistem&#8221;.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Znanstveniki so odkrili fosil majcenih bitij v obliki podkve, ki so se pred 480 milijoni let premikala po dnu oceana v vrsti eno za drugim. Gre za primer doslej najstarej\u0161ega znanega skupinskega vedenja \u017eivali, je poro\u010dala francoska agencija AFP.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1605],"tags":[8063,1645],"source":[1607,1518],"supertag":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Znanstveniki odkrili najstarej\u0161i dokaz o skupinskem vedenju izumrlih \u017eivali - Hudo Slovenija<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hudo.com\/si\/aktualno\/mnenja\/znanstveniki-odkrili-najstarejsi-dokaz-o-skupinskem-vedenju-izumrlih-zivali\/\" \/>\n<meta property=\"og:locale\" content=\"sl_SI\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Znanstveniki odkrili najstarej\u0161i dokaz o skupinskem vedenju izumrlih \u017eivali - Hudo Slovenija\" \/>\n<meta property=\"og:description\" content=\"Znanstveniki so odkrili fosil majcenih bitij v obliki podkve, ki so se pred 480 milijoni let premikala po dnu oceana v vrsti eno za drugim. 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