Embriyogenesis sürecinde Loligo vulgaris (Lamarck, 1798)' in huni (Sifon) organı gelişimi

Arnold (1965)’un gelişim şemasına göre, kafadanbacaklıların embriyonik gelişiminde belirleyici bir kriter olan huni (sifon) tüpü gelişimi, ticari değeri oldukça yüksek olan kalamar (Loligo vulgaris) için incelenmiştir. Denemede uzatma ağlarından toplanan 12 adet morula safhasındaki L. vulgaris yumurtası kapsülü kullanılmıştır. Yumurta kapsülleri, içinde havalandırma düzeneği bulunan (35 ml/dk), 1 litrelik üç adet plastik şeffaf kap içerisinde, 19.4±0.3°C sıcaklıkta, 37 ppt tuzlulukta, ve 12 saat aydınlık, 12 saat karanlık fotoperiyotta inkübe edilmiştir. L. vulgaris yumurtalarının embriyonik gelişiminde, huni tüpünün ilk oluşumu, safha 19’da görülmüştür. Safha 23’de huni organı kıvrımları önden arkaya doğru birleşmeye başlamıştır. Safha 24’de huni organı tamamen kapanmıştır, ancak organın ön ucunda yuvarlağımsı bir açıklık kalmıştır. Safha 25+’da, huni tüpü valfinin ilk oluşumu görülmüştür. Safha 26’da huni organı manto ile tam olarak örtülmüştür. Safha 27+’da huni tüpü valfi gözle görülür ölçüde belirginleşmiştir. Safha 30’da, yumurtadan çıkan yavru kalamarlar huni organlarını aktif olarak kullanmışlardır.

Anahtar Kelimeler:

embriyogenez, embriyonik gelişim, kalamar

The funnel tube development of Loligo vulgaris (Lamarck, 1798) in its embryogenesis

According to Arnold (1965)’s developmental scheme, development of the funnel tube, which is an identical criterion in embryonic development of cephalopods, was investigated in highly commercial squid Loligo vulgaris (Lamarck, 1798). Total of 12 L. vulgaris egg capsules at morula stage obtained from fishing lines were used in this experiment. The egg capsules were incubated in three 1-liter capacity transparent plastic bakers with aeration (35 ml/min) at 19.4±0.3°C, 37 ppt, and 12-h Light: 12-h Dark photoperiodicity. In embryonic development of L. vulgaris, primordium of funnel tube was firstly observed at stage 19. At stage 23, the funnel tube rudiments began to fuse from anterior to posterior. At stage 24, the funnel tube completely closed, but a circle opening became apparent at anterior of it. At stage 25+, primordia of the funnel valve is visible. At stage 26, the funnel tube is completely under covered of the mantle. At stage 27+, the funnel valve is prominent. At stage 30, newly hatchlings used their funnel tubes efficiently.

Keywords:

embryogenesis, embryonic development, squids,

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