Lvi, kosatky, hyeny a n\u011bkter\u00e9 jest\u0159\u00e1by jsou zn\u00e1m\u00ed sv\u00fdmi kooperativn\u00edmi loveck\u00fdmi technikami. Ned\u00e1vno v\u00fdzkumn\u00edci p\u0159idali do tohoto seznamu rybu \u2013 \u017elut\u00e9ho sedlov\u00e9ho ko\u017eichovit\u00e9ho.<\/p>\n\n
V Rud\u00e9m mo\u0159i se \u017elut\u00ed sedlov\u00ed ko\u017eichovit\u00e9 ryby \u010dasto shroma\u017e\u010fuj\u00ed. Kdy\u017e jeden jedinec za\u010dne pron\u00e1sledovat ko\u0159ist, jeho spole\u010dn\u00edci se p\u0159ipoj\u00ed k lovu jako \u201eblok\u00e1to\u0159i\u201c. Tito blok\u00e1to\u0159i se rozprost\u0159ou po \u00fatesu a uzav\u0159ou \u00fanikov\u00fdm tras\u00e1m ko\u0159isti, \u010d\u00edm\u017e skupin\u011b ryb zvy\u0161uj\u00ed \u0161anci na \u00fasp\u011b\u0161n\u00fd \u00falovek.<\/p>\n\n
Toto chov\u00e1n\u00ed pozorovali v\u00fdzkumn\u00edci ze \u0160v\u00fdcarsk\u00e9 univerzity v Neuch\u00e2telu. Navrhuj\u00ed, \u017ee tato kooperativn\u00ed loveck\u00e1 strategie se u druhu vyvinula, aby ko\u017eichovit\u00e9 ryby mohly vyu\u017e\u00edvat rychlej\u0161\u00ed a obratn\u011bj\u0161\u00ed ko\u0159ist.<\/p>\n\n
Datle dok\u00e1\u017eou opakovan\u011b \u00faderem hlavy do stromu rychlost\u00ed a\u017e 24\u202fkm\/h nezp\u016fsobit \u017e\u00e1dn\u00e9 po\u0161kozen\u00ed. Jak to d\u011blaj\u00ed?<\/p>\n\n
V\u00fdzkumn\u00edci z Beihang University v Pekingu pou\u017eili vysokorychlostn\u00ed video, mikroskopick\u00e9 skenov\u00e1n\u00ed a 3\u2011D modely. Zjistili, \u017ee hou\u017eevnat\u00e9 oblasti v lebce datle spolu s r\u016fzn\u011b velk\u00fdmi tk\u00e1n\u011bmi v horn\u00edm a doln\u00edm zob\u00e1ku jsou kl\u00ed\u010dov\u00e9 pro absorpci n\u00e1raz\u016f.<\/p>\n\n
Tento v\u00fdzkum m\u016f\u017ee m\u00edt dopad na n\u00e1vrh helmy a dal\u0161\u00edho ochrann\u00e9ho vybaven\u00ed.<\/p>\n\n
Ke konci posledn\u00ed doby ledov\u00e9 skupiny skupina lovc\u016f ve st\u00e1t\u011b Washington zabila mastodonta. Nov\u00e1 studie \u017eebra mastodonta s st\u00e1le zapu\u0161t\u011bn\u00fdm projektilov\u00fdm hrotem ukazuje, \u017ee zv\u00ed\u0159e \u017eilo p\u0159ed 13\u202f800 lety.<\/p>\n\n
Jedn\u00e1 se o jeden z nejstar\u0161\u00edch d\u016fkaz\u016f lovu v Nov\u00e9m sv\u011bt\u011b a podporuje teorii, \u017ee lid\u00e9 dorazili do Severn\u00ed Ameriky dlouho p\u0159ed lidmi z kultury Clovis, kte\u0159\u00ed byli d\u0159\u00edve pova\u017eov\u00e1ni za prvn\u00ed obyvatele.<\/p>\n\n
U pavouk\u016f rodu Pisaura<\/em> (pavouci z rodu \u201enursery web\u201c) samci nab\u00edzej\u00ed potenci\u00e1ln\u00edm samic\u00edm hmyz zabalen\u00fd do hedv\u00e1b\u00ed. N\u011bkte\u0159\u00ed samci v\u0161ak m\u00edsto hmyzu zabal\u00ed nepo\u017eivateln\u00e9 semeno.<\/p>\n\n Kdy\u017e samice takov\u00fd podvod odhal\u00ed, ukon\u010d\u00ed p\u00e1\u0159en\u00ed p\u0159ed\u010dasn\u011b. Toto chov\u00e1n\u00ed studovala Maria Albo z Aarhusk\u00e9 univerzity v D\u00e1nsku.<\/p>\n\n Kosatky, zn\u00e1m\u00e9 tak\u00e9 jako orky, se vyskytuj\u00ed v Antarktid\u011b, kde se \u017eiv\u00ed tulen\u011bmi a tu\u010d\u0148\u00e1ky. Ned\u00e1vn\u00e1 studie v\u0161ak zaznamenala, \u017ee n\u011bkter\u00e9 kosatky ob\u010das podnikaj\u00ed v\u00fdpravy do subtropick\u00fdch vod u Uruguaye a Braz\u00edlie.<\/p>\n\n Tyto v\u00fdpravy jsou p\u0159\u00edli\u0161 rychl\u00e9 na to, aby slou\u017eily k lovu nebo porodu, a proto v\u011bdci p\u0159edpokl\u00e1daj\u00ed, \u017ee souvis\u00ed s vylu\u010dov\u00e1n\u00edm k\u016f\u017ee. Kosatky v teplej\u0161\u00edch podm\u00ednk\u00e1ch sv\u00e1 k\u016f\u017ee vylu\u010duj\u00ed, aby obnovily ko\u017en\u00ed tk\u00e1\u0148 s men\u0161\u00ed ztr\u00e1tou tepla.<\/p>","protected":false},"excerpt":{"rendered":" Divok\u00e9 v\u011bci: kosatky, pavouci a datle Lovci ve sme\u010dk\u00e1ch Lvi, kosatky, hyeny a n\u011bkter\u00e9 jest\u0159\u00e1by jsou zn\u00e1m\u00ed sv\u00fdmi kooperativn\u00edmi loveck\u00fdmi technikami. Ned\u00e1vno v\u00fdzkumn\u00edci p\u0159idali do tohoto seznamu rybu \u2013 \u017elut\u00e9ho…<\/p>\n","protected":false},"author":2,"featured_media":25445,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[244],"tags":[740,309,254,219,252,97],"class_list":["post-1220","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-natural-history","tag-biology","tag-animal-behavior","tag-wildlife","tag-ecology","tag-nature","tag-science"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/1220","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=1220"}],"version-history":[{"count":2,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/1220\/revisions"}],"predecessor-version":[{"id":25446,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/1220\/revisions\/25446"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/25445"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=1220"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=1220"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=1220"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Pozorov\u00e1no: kosatka<\/h2>\n\n