Theodoxus syriacus (Gastropoda: Prosobranchia)'un Nötral Lipit, Fosfolipit ve Total Lipit Yağ Asiti Kompozisyonunun Mevsimsel Değişimi

Year 2010, Volume: 14 Issue: 1, - , 27.02.2014

İhsan Ekin Mehmet Başhan Rıdvan Şeşen

Abstract

Diyarbakır Devegeçidi Köprüsü civarından toplanan tatlısu salyangozu Thedoxus syriacus (Bourguignat, 1853)'un fosfolipit, nötral lipit ve total vücut lipitlerinin mevsimsel yağ asiti değişimi, bir yıl boyunca araştırıldı. Salyangozun tüm vücut lipitleri, ince tabaka kromatografi ile fraksiyonlandı. Fosfolipit, nötral lipit ve total lipit yağ asitleri gaz kromatografi (GC) ve gaz kromatografi- kütle spektrometresi (GC-MS) metodları ile analiz edildi. Lipit analizlerinde, C16:0, C18:0, C18:1<»9, C18:2<»6 ve C18:3<»3 asitler, diğer asitlere göre daha yüksek oranda saptandı. Fosfolipit, nötral lipit ve total lipitte bazı önemli farklılıklar bulundu. Yağ asitlerinin mevsimsel değişimleri, kısmen sıcaklık ve besin ile bağlantılı olduğu görüldü. Total doymuş yağ asiti (â–¡DYA) oranları (fosfolipitte %47.75, nötral lipitte %45.61 ve total lipitte %41.63) yaz döneminde yüksek oranda bulundu. Total tekli doymamış yağ asiti (â–¡TDYA) oranı, fosfolipitte (%35.05) en çok kış mevsiminde, nötral (%34.83) ve total lipitte (%39.10) ise en çok ilkbahar mevsiminde tespit edildi. Total çoklu doymamış yağ asiti (â–¡ÇDYA) oranları (fosfolipitte %55.89, nötral lipitte %59.99 ve total lipitte %50.66) ise tüm analizlerde sonbahar döneminde oldukça yüksek saptandı. Bu yüksek oran C18:2<»6 asitin, tüm analizlerin sonbahar döneminde çok yüksek oranda (%36.42 - %54.30) tespit edilmesinden kaynaklandı.
Anahtar kelimeler: Yağ Asitleri, Fosfolipit, Nötral Lipit, Theodoxus syriacus,Tatlısu Salyangozu

Keywords

Yağ Asitleri, Fosfolipit, Nötral Lipit, Theodoxus syriacus, Tatlısu Salyangozu

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