The Evaluation of the Reproductive Performance of Land Snail, Cornu aspersum (Müller, 1774) without Photoperiod in the Non-breeding Season

Öz

The purpose of this study was to investige the reproductive success of land snails (Cornu aspersum) without photoperiod during the non-breeding season in the Black Sea Region between December 2019 and January 2020. Snails, which were placed in cold storage for a hundred days, were awakened in December. The reproductive performances were assessed under semi-controlled laboratory conditions using the natural daylight cycle and the ideal temperature and moisture. The experiment was designed as a single group with 3 replications. The experiment was designed 3 replications, with 10 snails in each replicate in total of 30 snails. The reproductive performance of the snails was observed daily and the first mating took place on the 9th day of the study and the first egg-laying was detected in the second week of the study. The fecundity of the snails was 43%. Spawning activity was continued through to 3 weeks. The mean number of eggs, hatching rate and the number of offsprings were 151.13±22.02, 90.33±2.39% and 138.13±21.09, respectively. The mean egg and offspring live weights were 0.034±0.001 g and 0.03±0.007 g, respectively. The findings showed that the reproductive performance was low. In conclusion, reproductive performance is unsuitable for commercial snail production without the photoperiod treatment during the non-breeding season.

Anahtar Kelimeler

• Land snail,
• reproduction performance,
• breeding

The Evaluation of the Reproductive Performance of Land Snail, Cornu aspersum (Müller, 1774) without Photoperiod in the Non-breeding Season

Öz

Bu çalışma, Karadeniz Bölgesinde Cornu aspersum türü kara salyangozlarının doğal üreme dönemi olmayan dönemde, Aralık 2019-Ocak 2020 tarihleri arasında fotoperiyot uygulanmadan üreme başarısını gözlemlemek amacıyla yapılmıştır. Yüz gün süreyle soğuk hava deposunda bekletilen anaç salyangozlar, aralık ayında uyandırılmıştır. Üreme performansları, doğal gün ışığı döngüsü, ideal nem ve sıcaklık kullanılarak yarı kontrollü laboratuvar koşullarında değerlendirilmiştir. Deneme tek grup ve üç tekerrürlü olacak şekilde tasarlanmıştır. Deneme başladıktan sonra salyangozların üreme performansları günlük olarak gözlemlenmiştir. İlk çiftleşme çalışmanın dokuzuncu gününde gerçekleşmiş ve çalışmanın ikinci haftasında ilk yumurtlama tespit edilmiştir. Çalışmada salyangozların üreme performansı % 43 olarak bulunmuş olup yumurtlama aktivitesi üç haftaya kadar azalarak devam etmiştir. Ortalama yumurta sayısı, yavru çıkış oranı ve yavru sayısı sırasıyla 151.13±22.02, %90.33±2.39 ve 138.13±21.09 olarak bulunmuştur. Ortalama yumurta ve yavru ağırlıkları sırasıyla 0.034±0.001 g ve 0.03±0.007 g olarak tespit edilmiştir. Çalışmadan elde edilen bulgulara göre salyangozların üreme performanslarının düşük olduğu belirlenmiştir. Sonuç olarak, doğal üreme dönemi dışındaki bir dönemde fotoperiyot uygulanmadan elde edilen üreme performansının ticari salyangoz üretimi için uygun olmadığı sonucuna varılmıştır.

Anahtar Kelimeler

• Kara salyangozu,
• üreme performansı,
• yetiştiricilik

Kaynakça

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