{"id":10979,"date":"2011-06-01T23:55:14","date_gmt":"2011-06-01T20:55:14","guid":{"rendered":"http:\/\/109.232.216.219\/~bilimvegelecek\/?p=10979"},"modified":"2017-05-31T23:57:35","modified_gmt":"2017-05-31T20:57:35","slug":"disli-sazancik-baliklarinin-evrimindeki-patlama","status":"publish","type":"post","link":"https:\/\/bilimvegelecek.com.tr\/index.php\/2011\/06\/01\/disli-sazancik-baliklarinin-evrimindeki-patlama","title":{"rendered":"Di\u015fli sazanc\u0131k bal\u0131klar\u0131n\u0131n evrimindeki patlama"},"content":{"rendered":"<p>Kaliforniya \u00dcniversitesi-Davis\u2019te (UC Davis) yap\u0131lan yeni bir ara\u015ft\u0131rmaya g\u00f6re, biri Karayip Adas\u0131\u2019ndan di\u011feri de Meksika\u2019n\u0131n Yucatan Yar\u0131madas\u0131\u2019ndan olmak \u00fczere se\u00e7ilen iki k\u00fc\u00e7\u00fck bal\u0131k grubu, bir organizmada bilinen en h\u0131zl\u0131 evrimle\u015fme oranlar\u0131n\u0131 g\u00f6steriyor.<\/p>\n<p>Bu \u00e7al\u0131\u015fman\u0131n ilk yazar\u0131 olan y\u00fcksek lisans \u00f6\u011frencisi Chris Martin ve Kaliforniya \u00dcniversitesi-Davis\u2019den dan\u0131\u015fman\u0131 Evrim ve Ekoloji Profes\u00f6r\u00fc Peter Wainwright, Massachusetts ile Venezuela aras\u0131ndaki b\u00f6lgede 50 civar\u0131nda di\u015fli sazanc\u0131k bal\u0131\u011f\u0131 t\u00fcr\u00fcn\u00fcn bulundu\u011funu ve hepsinin de birbiriyle b\u00fcy\u00fck oranda ayn\u0131 oldu\u011funu belirttiler.<\/p>\n<p>Martin, \u201c\u0130ki yer d\u0131\u015f\u0131nda di\u015fli sazanlar\u0131n hepsi ayn\u0131 g\u00f6r\u00fcn\u00fcp, ayn\u0131 davran\u0131yorlar; kaya d\u00f6k\u00fcnt\u00fcleri ile kayalar\u0131n d\u0131\u015f\u0131ndaki yosunlar\u0131 yiyerek besleniyorlar.\u201d dedi.<\/p>\n<p>Martin, Bahamalar- San Salvador Adas\u0131\u2019ndaki tuzlu ve s\u0131\u011f g\u00f6llerde bulunan \u00fc\u00e7 di\u015fli sazan bal\u0131\u011f\u0131 t\u00fcr\u00fcnden ikisinin k\u00fc\u00e7\u00fck salyangoz ve karideslerle, bir t\u00fcr\u00fcn ise di\u011fer bal\u0131klar\u0131n pullar\u0131yla beslendi\u011fini ortaya \u00e7\u0131kard\u0131. Martin pul yedi\u011fi bilinen ba\u015fka bir sazan t\u00fcr\u00fc olmad\u0131\u011f\u0131n\u0131 belirtiyor.<\/p>\n<p>As\u0131l olarak Yucatan b\u00f6lgesinden olan sazan bal\u0131klar\u0131 aras\u0131nda bir tanesi di\u011fer bal\u0131klar\u0131 yiyerek beslenirken di\u011feri ise planktonlarla besleniyor. Ne yaz\u0131k ki, art\u0131k vah\u015fi hayatta bu bal\u0131klar bulunmuyor. Sadece laboratuvarlarda ve akvaryumlarda bulunuyorlar.<\/p>\n<p>Martin\u2019in t\u00fcrler i\u00e7in olu\u015fturdu\u011fu evrimsel haritas\u0131na g\u00f6re sazan bal\u0131klar\u0131 kendi beslenmelerine uygun \u00e7ene yap\u0131lar\u0131 olu\u015fturacak evrimsel de\u011fi\u015fiklikleri ge\u00e7irdiler.<\/p>\n<p>E\u011fer b\u00fct\u00fcn sazan bal\u0131klar\u0131n\u0131n evrimi durmadan geni\u015fleyen bir bulut gibiyse, Martin\u2019in Yucatan ve San Salvador Adas\u0131\u2019nda buldu\u011fu di\u015fli sazanc\u0131k bal\u0131klar\u0131 bulutun i\u00e7indeki havai fi\u015fek patlamas\u0131 gibiler. Martin\u2019e g\u00f6re, onlar di\u011fer sazan bal\u0131klar\u0131yla kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda 130 kat daha h\u0131zl\u0131 bir de\u011fi\u015fim ge\u00e7irerek evrim h\u0131z\u0131nda bir patlama g\u00f6sterirler.<\/p>\n<p>Bu iki b\u00f6lgedeki sazan bal\u0131klar\u0131n\u0131n b\u00f6ylesine h\u0131zl\u0131 de\u011fi\u015fim ge\u00e7irmelerinin sebebi kesin olarak bilinmiyor. Her iki b\u00f6lgedeki g\u00f6l sular\u0131 da s\u0131cak ve tuzlu ancak sazan bal\u0131klar\u0131n\u0131n ya\u015fad\u0131\u011f\u0131 di\u011fer yerlerde de bu b\u00f6yle. Fakat ayn\u0131 g\u00f6llerde bulunan sivrisinek bal\u0131klar\u0131n de\u011fi\u015fimlerinde hi\u00e7bir h\u0131z belirtisi g\u00f6r\u00fclmemektedir.<\/p>\n<p>Martin, melezleri de i\u00e7eren yavru laboratuvar bal\u0131klar\u0131n\u0131 kullanarak ve geli\u015fip geli\u015fmediklerini g\u00f6rmek i\u00e7in g\u00f6le geri d\u00f6nerek ara\u015ft\u0131rmas\u0131na devam etmektedir. Martin, melez spektrumunun d\u0131\u015f\u0131nda da ba\u015far\u0131l\u0131 olan bal\u0131klar\u0131 g\u00f6rmeyi umuyor.<\/p>\n<p>Ara\u015ft\u0131rma <em>The Evolution<\/em> (Evrim) dergisinde online olarak yay\u0131nland\u0131. Martin Ulusal Bilim Kurumunda (National Science Foundation ) lisans\u00fcst\u00fc ara\u015ft\u0131rma g\u00f6revlisidir.<\/p>\n<figure id=\"attachment_10980\" aria-describedby=\"caption-attachment-10980\" style=\"width: 300px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10980 size-medium\" src=\"https:\/\/bilimvegelecek.com.tr\/wp-content\/uploads\/2017\/05\/2-50-300x160.jpg\" alt=\"\" width=\"300\" height=\"160\" srcset=\"https:\/\/bilimvegelecek.com.tr\/wp-content\/uploads\/2017\/05\/2-50-300x160.jpg 300w, https:\/\/bilimvegelecek.com.tr\/wp-content\/uploads\/2017\/05\/2-50.jpg 400w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-10980\" class=\"wp-caption-text\">San Salvador Adas\u0131\u2019ndan olan bu sazan bal\u0131\u011f\u0131, di\u011fer bal\u0131klar\u0131n pullar\u0131n\u0131 yemesiyle bilinen tek t\u00fcrd\u00fcr. (Chris Martin, UC Davis)<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<p><strong>Kaynak: <\/strong>&#8216;Explosive&#8217; Evolution in Pupfish (1 May\u0131s 2011)<\/p>\n<p>http:\/\/www.sciencedaily.com\/releases\/2011\/04\/110427101530.htm<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kaliforniya \u00dcniversitesi-Davis\u2019te (UC Davis) yap\u0131lan yeni bir ara\u015ft\u0131rmaya g\u00f6re, biri Karayip Adas\u0131\u2019ndan di\u011feri de Meksika\u2019n\u0131n Yucatan Yar\u0131madas\u0131\u2019ndan olmak \u00fczere se\u00e7ilen iki k\u00fc\u00e7\u00fck bal\u0131k grubu, bir organizmada bilinen en h\u0131zl\u0131 evrimle\u015fme oranlar\u0131n\u0131 g\u00f6steriyor. Bu \u00e7al\u0131\u015fman\u0131n ilk yazar\u0131 olan y\u00fcksek lisans \u00f6\u011frencisi Chris Martin ve Kaliforniya \u00dcniversitesi-Davis\u2019den dan\u0131\u015fman\u0131 Evrim ve Ekoloji Profes\u00f6r\u00fc Peter Wainwright, Massachusetts ile Venezuela [&hellip;]<\/p>\n","protected":false},"author":799,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[125,19],"tags":[200],"class_list":["post-10979","post","type-post","status-publish","format-standard","hentry","category-88-sayi","category-bilim-gundemi","tag-evrim"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts\/10979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/users\/799"}],"replies":[{"embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/comments?post=10979"}],"version-history":[{"count":0,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts\/10979\/revisions"}],"wp:attachment":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/media?parent=10979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/categories?post=10979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/tags?post=10979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}