{"id":41875,"date":"2020-04-08T19:00:02","date_gmt":"2020-04-08T16:00:02","guid":{"rendered":"https:\/\/bilimvegelecek.com.tr\/?p=41875"},"modified":"2020-04-08T19:00:26","modified_gmt":"2020-04-08T16:00:26","slug":"atomik-testler-dunyanin-en-buyuk-baliginin-yas-gizemini-cozdu","status":"publish","type":"post","link":"https:\/\/bilimvegelecek.com.tr\/index.php\/2020\/04\/08\/atomik-testler-dunyanin-en-buyuk-baliginin-yas-gizemini-cozdu","title":{"rendered":"Atomik testler d\u00fcnyan\u0131n en b\u00fcy\u00fck bal\u0131\u011f\u0131n\u0131n ya\u015f gizemini \u00e7\u00f6zd\u00fc"},"content":{"rendered":"

So\u011fuk sava\u015f d\u00f6neminde yap\u0131lan atomik bomba testlerinden toplanan veriler biliminsanlar\u0131n\u0131n d\u00fcnyan\u0131n en b\u00fcy\u00fck bal\u0131\u011f\u0131n\u0131n ya\u015f\u0131n\u0131 d\u00fczg\u00fcn bi\u00e7imde saptamalar\u0131n\u0131 sa\u011flad\u0131.<\/p>\n

Balina k\u00f6pekbal\u0131klar\u0131 tropikal sularda ya\u015fayan b\u00fcy\u00fck, yava\u015f ve uysal hayvanlard\u0131r. Uzun ya\u015fayan hayvanlar olmakla birlikte biliminsanlar\u0131 uzun s\u00fcredir, nesli tehlikede olan bu hayvanlar\u0131n ya\u015flar\u0131n\u0131 saptamakta zorlan\u0131yorlard\u0131. Ancak d\u00fcnyan\u0131n radyoaktif miras\u0131n\u0131 kullanarak art\u0131k ellerinde t\u00fcr\u00fcn devam\u0131na yard\u0131mc\u0131 olacak uygulanabilir bir metot bulunuyor.<\/p>\n

Balina k\u00f6pekbal\u0131klar\u0131 d\u00fcnya \u00fczerinde ya\u015fayan en b\u00fcy\u00fck bal\u0131k ve en b\u00fcy\u00fck k\u00f6pekbal\u0131\u011f\u0131 unvanlar\u0131n\u0131 bir arada ta\u015f\u0131yor. 18 metreye kadar b\u00fcy\u00fcyebilen ve ortalama 20 ton a\u011f\u0131rl\u0131\u011f\u0131nda olan bu bal\u0131klar\u0131n \u00f6zg\u00fcn beyaz benekli renkleri, onlar\u0131 kolayca ay\u0131rt edilebilir k\u0131l\u0131yor.<\/p>\n

Suyu filtreleyerek beslenen bu hayvanlar esas olarak plankton ile besleniyor ve besin bulmak i\u00e7in ciddi mesafeler kat edebiliyorlar. Dalg\u0131\u00e7lar\u0131n yanlar\u0131nda y\u00fczmelerine s\u0131k s\u0131k izin vermeleriyle de bir\u00e7ok yerde turist topluluklar\u0131 aras\u0131nda pop\u00fclerlik kazanm\u0131\u015f durumdalar. Ancak Tayland ve Filipinler gibi \u00fclkelerde a\u015f\u0131r\u0131 avlanmadan dolay\u0131 nesli tehlikede olarak s\u0131n\u0131fland\u0131r\u0131l\u0131yorlar.
\nYa\u015flar\u0131n\u0131 saptamak ve t\u00fcrle alakal\u0131 bir\u00e7ok \u015fey h\u00e2l\u00e2 gizemini koruyor.<\/p>\n

Bug\u00fcne kadar biliminsanlar\u0131 \u00f6l\u00fc balina k\u00f6pekbal\u0131klar\u0131n\u0131n omurgalar\u0131ndaki \u00f6zg\u00fcn halkalar\u0131 saymaya \u00e7al\u0131\u015ft\u0131lar. Bu halkalar bir nevi a\u011fa\u00e7 g\u00f6vdelerinde bulunan halkalar gibi i\u015fliyorlar, hayvan ya\u015fland\u0131k\u00e7a say\u0131lar\u0131 art\u0131yor.<\/p>\n

Ancak biliminsanlar\u0131 bu halkalar\u0131n olu\u015fum \u015fekilleri ve nedenleri konusunda emin de\u011fillerdi.<\/p>\n

\"\"
Balina k\u00f6pekbal\u0131\u011f\u0131n\u0131n omurgas\u0131n\u0131n b\u00fcy\u00fcme \u00e7izgilerini g\u00f6steren \u00e7aprazlama bir b\u00f6l\u00fcm\u00fc.<\/figcaption><\/figure>\n

1940\u2019lar\u0131n sonlar\u0131ndan itibaren ABD, Sovyetler Birli\u011fi, Britanya, Fransa ve \u00c7in de dahil olmak \u00fczere bir\u00e7ok \u00fclke farkl\u0131 noktalarda atomik bomba testleri ger\u00e7ekle\u015ftirdi. B\u00fct\u00fcn bu patlamalar\u0131n bir yan etkisi de atmosferde Karbon-14 denilen bir izotopun miktar\u0131n\u0131n 2 kat\u0131na \u00e7\u0131kmas\u0131 oldu. Zaman i\u00e7inde d\u00fcnyadaki her canl\u0131 varl\u0131k atmosferdeki bu fazla Karbon-14\u2019\u00fc absorbe etti ve bu karbon-14 h\u00e2l\u00e2 varl\u0131\u011f\u0131n\u0131 s\u00fcrd\u00fcrmekte. Ancak biliminsanlar\u0131 bu izotopun bozunma h\u0131z\u0131n\u0131 bildikleri i\u00e7in bu, canl\u0131n\u0131n ya\u015f\u0131n\u0131 belirlemede bir g\u00f6sterge\u00e7 g\u00f6revi g\u00f6r\u00fcyor. Canl\u0131 ne kadar ya\u015fl\u0131ysa o kadar az karbon-14 bulmay\u0131 beklersiniz. Ara\u015ft\u0131rmac\u0131lar bu bilginin b\u00fcy\u00fcme h\u0131zlar\u0131n\u0131 saptamakta \u00f6nemli bir rol te\u015fkil etti\u011fini ve uzun vadede t\u00fcr\u00fc kurtarmada elzem bir rol te\u015fkil etti\u011fini belirtiyorlar<\/p>\n

Perth\u2019deki Avusturalya Deniz Bilimleri Enstit\u00fcs\u00fc\u2019nden Dr. Mark Meekan \u201cO d\u00f6nemde hayatta olan her canl\u0131 Karbon-14\u2019te ger\u00e7ekle\u015fen bu ani y\u00fckseli\u015fi v\u00fccudunun sert k\u0131s\u0131mlar\u0131na i\u015fledi\u201d diyor. Meekan ekliyor: \u201cBu \u015fu demek oluyor: Omurgalar\u0131n i\u00e7inde bir zaman g\u00f6stergeci bulunuyor. Bu da demek oluyor ki bu izotoplar\u0131n\u0131n bozunma s\u00fcrelerini, bozulduklar\u0131 zaman aral\u0131klar\u0131n\u0131 saptayabiliriz.\u201d<\/p>\n

Bu k\u00f6pekbal\u0131klar\u0131n\u0131n ya\u015f\u0131n\u0131 saptamakta zorlay\u0131c\u0131 etkenlerden biri omurga \u00f6rneklerine eri\u015fmek oldu. Ekip Pakistan ve Tayvan\u2019da iki uzun s\u00fcre \u00f6nce \u00f6lm\u00fc\u015f \u00f6rne\u011fe ula\u015fmay\u0131 ba\u015fard\u0131. Ara\u015ft\u0131rmalar asl\u0131nda bu hayvanlar\u0131n inan\u0131lmaz derecede uzun bir ya\u015fam s\u00fcreleri oldu\u011funa i\u015faret ediyor. Dr. Meekan \u201c Bu hayvanlar\u0131n ya\u015fam s\u00fcresi \u00e7ok \u00e7ok uzun olabilir, 100-150 y\u0131la kadar uzan\u0131yor olabilir\u201d diyor. Meekan, \u201cBu, t\u00fcr i\u00e7in b\u00fcy\u00fck \u00f6neme sahip. T\u00fcr\u00fcn a\u015f\u0131r\u0131 avlanmaya kar\u015f\u0131 a\u015f\u0131r\u0131 derecede hassas olabilece\u011fini ortaya koyuyor.\u201d diye ekliyor.<\/p>\n

Biliminsanlar\u0131 sonu\u00e7lar\u0131n avlanmalar\u0131n\u0131n ger\u00e7ekle\u015fti\u011fi Tayland ve Tayvan gibi yerlerde k\u00f6pekbal\u0131\u011f\u0131 say\u0131lar\u0131n\u0131n neden \u00e7\u00f6k\u00fc\u015f ya\u015fad\u0131\u011f\u0131n\u0131 a\u00e7\u0131klad\u0131\u011f\u0131n\u0131 belirtiyor.<\/p>\n

\"\"
Plankton aray\u0131\u015f\u0131nda bir balina k\u00f6pekbal\u0131\u011f\u0131.<\/figcaption><\/figure>\n

T\u00fcr\u00fcn IUCN (\u0130ngilizce: International Union for Conservation of Nature, T\u00fcrk\u00e7e: D\u00fcnya Do\u011fa ve Do\u011fal Kaynaklar\u0131 Koruma Birli\u011fi) k\u0131rm\u0131z\u0131 listesinde tehlikede stat\u00fcs\u00fcnden, t\u00fckenme tehlikesi alt\u0131nda stat\u00fcs\u00fcne y\u00fckseltilmesinin yan\u0131nda biliminsanlar\u0131, \u00e7abalar\u0131n\u0131n t\u00fcr\u00fc korumada yard\u0131mc\u0131 olaca\u011f\u0131n\u0131 d\u00fc\u015f\u00fcn\u00fcyor. Balina k\u00f6pekbal\u0131klar\u0131n\u0131n ya\u015f\u0131n\u0131 do\u011fru bir bi\u00e7imde tahmin edebilmeleriyle biliminsanlar\u0131 n\u00fcfusun ne durumda oldu\u011fu ve bal\u0131k\u00e7\u0131l\u0131k faaliyetlerinin yap\u0131l\u0131p yap\u0131lamayaca\u011f\u0131 konusunda daha do\u011fru y\u00f6nlendirmelerde bulunabilecekler.<\/p>\n

Bir\u00e7ok tropikal b\u00f6lgede balina k\u00f6pekbal\u0131\u011f\u0131 turizmi \u00f6nemli bir etkinlik haline gelmi\u015f durumda. Ara\u015ft\u0131rmac\u0131lara g\u00f6re balina k\u00f6pekbal\u0131klar\u0131n\u0131n takip etti\u011fi uzun rotalar \u00fczerinde bulunan \u00fclkelerin i\u015fbirli\u011fi i\u00e7inde olmas\u0131 t\u00fcr\u00fcn hayatta kalmas\u0131nda \u00e7ok b\u00fcy\u00fck \u00f6nem te\u015fkil ediyor.<\/p>\n

Ara\u015ft\u0131rma Frontiers in Marine Science (Deniz Biliminde \u00d6nc\u00fcler) dergisinde yay\u0131mland\u0131.<\/p>\n

Kaynak:<\/strong> https:\/\/www.bbc.com\/news\/science-environment-52155008<\/p>\n","protected":false},"excerpt":{"rendered":"

So\u011fuk sava\u015f d\u00f6neminde yap\u0131lan atomik bomba testlerinden toplanan veriler biliminsanlar\u0131n\u0131n d\u00fcnyan\u0131n en b\u00fcy\u00fck bal\u0131\u011f\u0131n\u0131n ya\u015f\u0131n\u0131 d\u00fczg\u00fcn bi\u00e7imde saptamalar\u0131n\u0131 sa\u011flad\u0131. Balina k\u00f6pekbal\u0131klar\u0131 tropikal sularda ya\u015fayan b\u00fcy\u00fck, yava\u015f ve uysal hayvanlard\u0131r. Uzun ya\u015fayan hayvanlar olmakla birlikte biliminsanlar\u0131 uzun s\u00fcredir, nesli tehlikede olan bu hayvanlar\u0131n ya\u015flar\u0131n\u0131 saptamakta zorlan\u0131yorlard\u0131. Ancak d\u00fcnyan\u0131n radyoaktif miras\u0131n\u0131 kullanarak art\u0131k ellerinde t\u00fcr\u00fcn devam\u0131na yard\u0131mc\u0131 […]<\/p>\n","protected":false},"author":2027,"featured_media":41878,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19],"tags":[6091,6092,6093],"class_list":["post-41875","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilim-gundemi","tag-balina","tag-izotop","tag-kopekbaligi"],"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