Erkeksiz Üreyebilen Bu Yaratıklar Dünyayı İstila Ediyor

Erkeği olmadan üreyebilen dişilerden oluşan ve sadece 30 yıllık geçmişe sahip yeni bir kerevit türünün hızla çoğaldığı ve dünya genelindeki ekosistemleri işgal etmeye başladığı belirtildi.

Yeni yapılan bir çalışmaya göre, benekli kerevit adı verilen türün kökeni DNA’sındaki bir mutasyon sayesinde tek başına üreyebilen bir tek dişiye dayanıyor.

Benekli kerevitin evlerde beslenmemesine yönelik uyarıya rağmen Kanada’da satılıyor. 10 bacaklı mutant tür, Avrupa Birliği (AB) tarafından ise yasaklandı.

Bilimsel adı “Procambarus Virginalis” olan tür 30 yıl öncesine kadar yoktu. Ancak şimdi Japonya, Madagaskar, İsveç ve ABD’de vahşi yaşamda görülüyor.

Nature, Ecology an Evolution (Doğa, Ekoloji ve Evrim) adlı bilim dergisinde yayımlanan araştırmada, işgalci benekli kerevitlerin, Madagaskar’daki yerli kerevit türlerini tehdit ettiği belirtildi.

Araştırma ekibinden Dr. Wolfgang Stein Kanada devlet televizyonu CBC’de yaptığı açıklamada, “Bir benekli kerevitiniz varsa üç ay sonra 200 ya da 300 tane olur” dedi.

Aslında, bu tatlı su kerevitinin nasıl tek başına ürediğini inceleyen bilim insanları, kanserin nasıl yayıldığını daha iyi anlayabilir.

Benekli kerevitler Kanada’daki evcil hayvan dükkanlarından ya da internette alınabiliyor.

İnternetteki bir ilanda bir satıcı bir küçük benekli kereviti bedavaya verirken, biraz daha büyük beş kerevit için 20 Kanada doları istiyor.

Kanada’da şu anda vahşi yaşamda benekli kerevit bulunmuyor. Ancak yetkililer bu canlıları doğaya salmanın yasadışı olduğu uyarısında bulunuyor.


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