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  • Turkish Journal of Zoology
  • Volume:27 Issue:4
  • The Larval Development Stages of the Japanese Snail, Rapana thomasiana, Gross 1861, in the Egg Capsu...

The Larval Development Stages of the Japanese Snail, Rapana thomasiana, Gross 1861, in the Egg Capsule

Authors : Orhan UYAN, Orhan ARAL
Pages : 331-337
View : 14 | Download : 11
Publication Date : 0000-00-00
Article Type : Research Paper
Abstract :Bu çal›flmada, Karadeniz’de yay›l›fl gösteren deniz salyangozunun insert ignore into journalissuearticles values(Rapana thomasiana); yumurta kapsülü içerisindeki larval geliflim dönemlerinin saptanmas› amaçlanm›flt›r. Yumurtlama an›nda küresel olan yumurta çap› 151,5 ± 2,61 µm olarak ölçülmüfltür. Larvalar ilk geliflimlerini kapsül içerisinde tamamlam›fl ve 20. günde veliger larva olarak kapsülden d›flar› ç›km›fllard›r. Kapsülü terk eden pelajik larvalar, 25. günde türe özgü larval flekil alarak bentik bölgeye yerleflmifllerdir. Bu dönemde larvalar›n eni ve boyu, s›ras›yla % 181,2 ve % 101,7 oran›ndaki art›flla 426,8 ± 2,84 µm X 305,6 ± 2,2 µm olarak belirlenmifltir.
Keywords : Deniz Salyangozu, Rapana thomasiana, Gross 1861, Larval Geliflim, Karadeniz

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