{"id":25557,"date":"2014-05-01T15:58:45","date_gmt":"2014-05-01T12:58:45","guid":{"rendered":"https:\/\/bilimvegelecek.com.tr\/?p=25557"},"modified":"2018-05-15T16:35:34","modified_gmt":"2018-05-15T13:35:34","slug":"zebralar-neden-cizgili","status":"publish","type":"post","link":"https:\/\/bilimvegelecek.com.tr\/index.php\/2014\/05\/01\/zebralar-neden-cizgili","title":{"rendered":"Zebralar neden \u00e7izgili?"},"content":{"rendered":"

Zebralar\u0131n \u00e7izgilere sahip olmas\u0131n\u0131n pek \u00e7ok a\u00e7\u0131klamas\u0131 yap\u0131lm\u0131\u015ft\u0131r. Yeni ara\u015ft\u0131rmalar, parazit sineklerini cayd\u0131rmak \u00fczere evrim ge\u00e7irdikleri g\u00f6r\u00fc\u015f\u00fcnde a\u011f\u0131rl\u0131k kazan\u0131yor.<\/p>\n

Charles Darwin, \u0130nsan\u0131n T\u00fcreyi\u015fi<\/em>\u2019nde zebralar\u0131n \u00e7izgileriyle ilgili gizemi, William Burchell\u2019in g\u00f6zlemleri \u00fczerine yazd\u0131klar\u0131ndan hareketle kamuflaj olarak nitelemeyi reddetmi\u015fti. Burchell g\u00fcne\u015f alt\u0131nda zebralar\u0131n \u00e7izgilerinin ne kadar g\u00f6z al\u0131c\u0131 oldu\u011funu anlat\u0131yordu. Darwin \u00e7izgilerin erkek ve di\u015filerin \u00e7iftle\u015fmek i\u00e7in mant\u0131kl\u0131 tercihler yapmalar\u0131na yard\u0131mc\u0131 olabildi\u011fini d\u00fc\u015f\u00fcn\u00fcyordu. Alfred Russel Wallace ise, gece ve dolunay zaman\u0131 su i\u00e7meye giden zebralar\u0131n avlanmak i\u00e7in hedef olduklar\u0131n\u0131, ancak alacakaranl\u0131kta siyah-beyaz renklerin gri bir tona d\u00f6n\u00fc\u015ferek, alg\u0131lanmamalar\u0131 avantaj\u0131n\u0131 sa\u011flad\u0131\u011f\u0131n\u0131 belirtti. Belki de \u00e7izgiler zoolojik birtak\u0131m barkodlar i\u00e7eriyor, bir zebran\u0131n di\u011ferini tan\u0131mas\u0131n\u0131 sa\u011fl\u0131yordu. V\u00fccut \u0131s\u0131lar\u0131n\u0131 d\u00fczenlemelerine yard\u0131mc\u0131 olaca\u011f\u0131 da ileri s\u00fcr\u00fcld\u00fc.<\/p>\n

Kaliforniya Davis \u00dcniversitesi\u2019nden Tim Caro, at, e\u015fek, zebra gibi atgillerde \u00e7izgilerin ekolojik ya\u015famla bir ilgisi olup olmad\u0131\u011f\u0131n\u0131 ara\u015ft\u0131rd\u0131. Caro u\u00e7an parazitlerin atgillerdeki \u00e7izgili y\u00fczeyleri tercih etmedi\u011fini ve \u00f6zellikle \u00e7e\u00e7e sineklerinin yo\u011fun oldu\u011fu yerlerde atgillerin \u00e7izgili y\u00fczeylere sahip olduklar\u0131n\u0131 g\u00f6zlemledi\u011fini anlat\u0131yor. \u00c7e\u00e7e sineklerinin emdikleri kanda yap\u0131lan \u00f6l\u00e7\u00fcmlerde, derileri ince oldu\u011fu halde, \u015feritli bir g\u00f6r\u00fcn\u00fcme sahip zebralar\u0131n kan\u0131na daha az rastlan\u0131yor.<\/p>\n

Sineklerin \u00e7izgili zeminleri sevmedi\u011fi d\u00fc\u015f\u00fcncesi 1930\u2019lara uzan\u0131r. Ce\u015fitli \u00e7al\u0131\u015fmalarda; sineklerin tamam\u0131 siyah veya beyaz zeminleri, \u015feritli zeminlerden daha \u00e7ok tercih ettikleri fikri a\u011f\u0131r basm\u0131\u015f. Caro, \u00e7e\u00e7e ve at sineklerinin emdikleri kan\u0131n g\u00fcnde birka\u00e7 y\u00fcz mililitreyi buldu\u011funu ve \u00f6l\u00fcmc\u00fcl hastal\u0131klar ta\u015f\u0131yabildiklerini belirtiyor. \u00c7al\u0131\u015fman\u0131n sonraki ad\u0131m\u0131, \u00e7e\u00e7e ve at sineklerinin \u015feritlere olan nefretinin nedenlerini ara\u015ft\u0131rmak.<\/p>\n

Kaynaklar<\/strong><\/p>\n

1) http:\/\/www.theguardian.com\/science\/animal-magic\/2014\/apr\/02\/why-do-zebras-have-stripes-scientists-have-the-answer<\/p>\n

2) http:\/\/www.newvision.co.ug\/news\/654175-how-the-zebra-earned-its-stripes.html<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Zebralar\u0131n \u00e7izgilere sahip olmas\u0131n\u0131n pek \u00e7ok a\u00e7\u0131klamas\u0131 yap\u0131lm\u0131\u015ft\u0131r. Yeni ara\u015ft\u0131rmalar, parazit sineklerini cayd\u0131rmak \u00fczere evrim ge\u00e7irdikleri g\u00f6r\u00fc\u015f\u00fcnde a\u011f\u0131rl\u0131k kazan\u0131yor. Charles Darwin, \u0130nsan\u0131n T\u00fcreyi\u015fi\u2019nde zebralar\u0131n \u00e7izgileriyle ilgili gizemi, William Burchell\u2019in g\u00f6zlemleri \u00fczerine yazd\u0131klar\u0131ndan hareketle kamuflaj olarak nitelemeyi reddetmi\u015fti. Burchell g\u00fcne\u015f alt\u0131nda zebralar\u0131n \u00e7izgilerinin ne kadar g\u00f6z al\u0131c\u0131 oldu\u011funu anlat\u0131yordu. Darwin \u00e7izgilerin erkek ve di\u015filerin \u00e7iftle\u015fmek i\u00e7in […]<\/p>\n","protected":false},"author":42,"featured_media":25558,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[160,38],"tags":[3277,200,3276],"class_list":["post-25557","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-123-sayi","category-dergi-sayilari","tag-cizgi","tag-evrim","tag-zebra"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t