Reproductive Biology of Sepiola intermedia (Sepiolidae: Cephalopoda) in the Aegean Sea, Eastern Mediterranean

Bu çalışmada 2007-2008 yılları arasında Ege Denizinden mevsimsel olarak Sep iola intermediaya ait 111 adet birey örneklenmiştir. Bu çalışmada gözlenen olgun dişi bireyler 15 22 mm manto boyunda (ML), erkek bireyler ise 15 23 mm ML olarak tespit edilmiştir. Örneklenen bireyler içinden her iki cinsiyete ait gonadosomatik indeks değerleri incelenmiştir. Gonadlardaki yumurtaların olgunluk durumlarına göre gonadın gelişimi asenkronik gonad tipinde olup yumurtlamanın her seferinde az miktarlarda ve uzun bir periyot içinde gerçekleştiği düşünülmektedir. Üreme potansiyeli dişi bireylerde 148-406 yumurta (ortalama 271), erkek bireylerde ise 54-383 spermatofor (ortalama 197) olarak tespit edilmiştir. 14-22 mm manto boyu arasındaki dişi bireylerin bursa kopulatrikslerinde 68 161 (ortalama 96) arasında spermatangiaya rastlanmıştır. Tespit edilen bu spermatangiaların boyları 0.3 0.9 mm arasında olup, tüm mevsimlerde gözlenmiştir. Bu çalışma S. intermedianın üreme biyolojisi için yeni katkılar içermektedir.

Sepiola intermedia (Sepiolidae: Cephalopoda) nın Ege Denizi nde (Doğu Akdeniz) Üreme Biyolojisi

A total of 111 Sep iola intermedia specimens were collected from the Aegean Sea at seasonally between 2007 and 2008. The maturity stages of both sexes and the gonadosomatic index values were estimated. It was observed that the ovulation pattern of S. intermedia is asynchronous and spawning occurs continuously. Potential fecundity ranges for females and males were determined to be between 148-406 eggs (mean 271) and 54-383 spermatophores (mean 197), respectively. The females with mantle lengths ML between 14-22 mm obtained 68 to 161 spermantangia (mean 96) ranging from 0.3-0.9 mm in length throughout the season inside their bursa copulatrix. The mantle lengths of mature females varied from 15 to 22 mm ML, those of mature males between 15 and 23 mm ML. This study provides new records on the reproductive biology of S. intermedia.

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