Mokslininkai, filmuodami gyv\u016bnus Piet\u0173 Kinijos j\u016bros gelm\u0117se, u\u017efiksavo ret\u0105 elges\u012f: giliavanden\u0117 \u017euvis geba ne tik \u201evaik\u0161\u010dioti\u201c dugnu, bet ir jud\u0117ti \u0161onu bei atbulomis. Tai pasteb\u0117ta tyrin\u0117jant j\u016brin\u012f gaid\u012f, kurio jud\u0117jimo b\u016bdas primena v\u0117\u017eiagyvi\u0173 manevrus.<\/p>\n
Tyrimo centre atsid\u016br\u0117 r\u016b\u0161is Scalicus engyceros, priklausanti j\u016brini\u0173 gaid\u017ei\u0173 grupei. \u0160ios \u017euvys i\u0161siskiria ypatingais kr\u016btin\u0117s pelek\u0173 spinduliais, kurie veikia tarsi atskiros \u201ekojyt\u0117s\u201c ir leid\u017eia remtis \u012f sm\u0117l\u012f ar dumbl\u0105.<\/p>\n
Skirtingai nei dauguma iki \u0161iol apra\u0161yt\u0173 dugnu \u201evaik\u0161tan\u010di\u0173\u201c \u017euv\u0173, kurios paprastai juda tik pirmyn, nauji vaizdo \u012fra\u0161ai parod\u0117 platesn\u012f judesi\u0173 repertuar\u0105. Fiksuota, kad \u017euvis gali slysti \u012f \u0161on\u0105, o prireikus atsitraukti atbulomis, koreguodama krypt\u012f be apsisukimo.<\/p>\n
\u201e\u0160is atradimas kei\u010dia nusistov\u0117jus\u012f supratim\u0105 apie tai, kaip gali jud\u0117ti dugnin\u0117s giliavanden\u0117s \u017euvys\u201c, \u2013 sak\u0117 pagrindinis tyrimo autorius Han Tian.<\/p>\n
Pasak tyr\u0117j\u0173, \u017euvis jud\u0117jimui naudoja tr\u016bk\u010diojan\u010dius, \u201esprogstamus\u201c impulsus, pana\u0161ius \u012f kreve\u010di\u0173 \u0161uolius, ir kartu pasitelkia uodegos mostus plaukimui. Toks derinys leid\u017eia greitai pereiti nuo l\u0117to \u201e\u0117jimo\u201c prie staigaus manevro, kai reikia pasprukti ar pakeisti pozicij\u0105.<\/p>\n
Tyr\u0117jai taip pat apra\u0161\u0117 ne\u012fprastas \u016bs\u0173 pavidalo ataugas, vadinamas barbel\u0117mis, kurios i\u0161sid\u0117sto skersai k\u016bno a\u0161ies. Jos labiau primena gr\u0117bliukus, o ne mink\u0161tus \u201e\u016bsus\u201c ir, manoma, padeda ap\u010diuopti bei \u201ei\u0161\u0161ukuoti\u201c nuos\u0117das ie\u0161kant grobio.<\/p>\n
Nors tokia sandara n\u0117ra ideali greitam jud\u0117jimui, ji suteikia prana\u0161um\u0105 maitinantis ant dugno. \u017duvis gali tyrin\u0117ti grunt\u0105 ir net \u012fsmigti \u012f pavir\u0161in\u012f nuos\u0117d\u0173 sluoksn\u012f, kad efektyviau aptikt\u0173 maisto \u0161altinius.<\/p>\n
Steb\u0117jimai atlikti nat\u016bralioje aplinkoje, pasitelkiant giliavandenius aparatus, kurie leido detaliai fiksuoti judesius skirtingose \u0161iaurin\u0117s Piet\u0173 Kinijos j\u016bros vietose. Tokie tyrimai ypa\u010d vertingi, nes daugelis giliavandeni\u0173 r\u016b\u0161i\u0173 elgsenos detali\u0173 lieka nepastebimos laboratorin\u0117mis s\u0105lygomis.<\/p>\n
Mokslininkai pabr\u0117\u017eia, kad gyvi steb\u0117jimai gelm\u0117se padeda tiksliau suprasti evoliucines adaptacijas. Dugnini\u0173 \u017euv\u0173 \u201e\u0117jimas\u201c laikomas vienu \u012fdomiausi\u0173 pavyzd\u017ei\u0173, kaip pelekai gali \u012fgyti funkcij\u0173, pana\u0161i\u0173 \u012f gal\u016bnes, o nauji duomenys rodo, kad toki\u0173 prisitaikym\u0173 \u012fvairov\u0117 gali b\u016bti didesn\u0117, nei manyta.<\/p>\n","protected":false},"excerpt":{"rendered":"
Giliavanden\u0117 \u017euvis Piet\u0173 Kinijos j\u016broje nufilmuota judanti dugnu ne tik pirmyn, bet ir \u0161onu bei atbulomis \u2013 tyr\u0117jai ai\u0161kina, kaip tai \u012fmanoma.<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7],"tags":[101,3211,29064,6944,40693,6188,29119],"miestas":[],"class_list":["post-52600","post","type-post","status-publish","format-standard","hentry","category-technologijos","tag-ekologija","tag-evoliucija","tag-giliavandenes-zuvys","tag-gyvunu-elgsena","tag-jurinis-gaidys","tag-juru-biologija","tag-pietu-kinijos-jura"],"acf":[],"_links":{"self":[{"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/posts\/52600","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/comments?post=52600"}],"version-history":[{"count":0,"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/posts\/52600\/revisions"}],"wp:attachment":[{"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/media?parent=52600"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/categories?post=52600"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/tags?post=52600"},{"taxonomy":"miestas","embeddable":true,"href":"https:\/\/cp.snarskis.lt\/index.php\/wp-json\/wp\/v2\/miestas?post=52600"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}