Serpil SERDAR, Aynur LÖK, Ali KIRTIK, Sefa ACARLI, Aysun KÜÇÜKDERMENCİ, Mehmet GÜLER, Selçuk YİĞİTKURT

Comparison of gonadal development of carpet shell clam (Tapes decussatus, Linnaeus 1758) in inside and outside of Çakalburnu Lagoon, Izmir Bay

Bu çalışmada İzmir Körfezi, Çakalburnu Dalyan’ında iç ve dış bölgelerden toplanan akivadeslerin (Tapes decussatus) gametogenez döngüsü Ağustos 2006–Temmuz 2007 tarihleri arasında incelenmiştir. T. decussatus’ un gonad gelişiminin yıl boyunca sürdüğünü ve her iki bölgede de altı safhanın bulunduğunu histolojik incelemeler göstermiştir. Erkek bireylerin dalyan içinde kasım ayı haricinde, dalyan dışında ise aralık ve ocak ayları dışında tüm yıl olgun safhada (Safha III) olduğu gözlemlenmiştir. Buna ek olarak döl bırakımı (Safha IV veya V) dalyan içinde yıl boyunca, dalyan dışında ise şubat ve mart ayları haricinde yıl boyunca sürmüştür. Dişi akivadeslerde olgunlaşma (Safha III) her iki bölgede de erkek bireyler ile benzer zamanlarda gerçekleşmiştir. Çalışma alanında safha 0 (dinlenme) sadece %3-5 oranında kasım, aralık, ocak aylarında tespit edilmiştir. Erkek/dişi cinsiyet oranı dalyan içinde 1:1,06 dalyan dışında ise 1:1,10 olarak bulunmuştur (P>0,05).

Anahtar Kelimeler:

Türkiye, Ege Denizi, gametogenez, Veneridae

İzmir Körfezi, Çakalburnu Dalyan’ında iç ve dış bölgelerdeki akivadeslerin (Tapes decussatus, Linnaeus 1758) gonad gelişimlerinin karşılaştırılması

A study of the gametogenic cycle of the carpet shell clam, Tapes decussatus, was undertaken in the inside and outside of Çakalburnu Lagoon, Izmir Bay, Aegean Sea from August 2006 to July 2007. Histological evidence showed that gametogenesis of T. decussatus continued throughout the year and six stages of gonadal development were observed in two sites. In males, except for November in inside and December and January in outside of lagoon ripeness (Stage III) clam was observed during a year. In addition, spawning (Stage IV or Stage V) continued throughout the year in inside and except for February and March in outside. In females, ripe clam (Stage III) was observed similar time with male in two sites. It was observed that Stage 0 (inactive or resting) was only 3.0-5.0% ratio in November, December and January in two sites. The male/female sex ratio for inside and outside of lagoon was 1:1.06 and 1:1.10, respectively (P>0.05).

Keywords:

Turkey, Aegean Sea, gametogenesis, Veneridae,

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