DENİZ ÇOBAN, Cüneyt SÜZER, Şükrü YILDIRIM, ŞAHİN SAKA, M.Kürşat FIRAT

Kültür koşullarında yetiştirilen Avrupa deniz levreklerinde (Dicentrarchus labrax) iskelet deformasyonları

Bu çalışmada yetiştiriciliği yoğun olarak yapılan Avrupa deniz levreklerinin (Dicentrarchus labrax) kültür koşullarında, erken dönemlerinde (0-42 DAH) notokorda bükülmesine bağlı olarak meydana gelen kemik ve kıkırdak yapı deformasyonları incelenmiştir. Kemik ve kıkırdak yapıda meydana gelen deformasyonların tespiti için 836 levrek larvası ikili boyama yöntemi kullanılarak, Alcian mavisi ve Alizarin kırmızısı ile boyanmıştır. Yumurtadan yeni çıkmış levrek larvasının ortalama toplam boyu 3,46±0,02 mm, olarak belirlenmiş, larval dönemin sonunda ortalama 18,58±0,1 mm olarak tespit edilmiştir. İncelenen 836 adet larva içinde, 270 adet deforme larva ve bu larvalarda toplam 1256 adet deformasyon tespit edilmiştir. İskelet deformasyonu oranı %32 olarak belirlenmiştir. Levrek larvalarında en fazla karşılaşılan deformasyon omurga malformasyonu olmuş (%21,3) bunu omur erimesi (%18,6) ve lordosis (%12,7) takip etmiştir. Bu çalışmada en fazla deformasyon notokorda bükülmesi sonrasında (%52,1) tespit edilmiştir.

Skeletal deformities in hatchery reared European sea bass (Dicentrarchus labrax)

In this study, skeletal deformities were investigated during early life stages according to notochord flexion in European sea bass (Dicentrarchus labrax) larvae under intensive culture conditions. In order to detect the skeletal deformities, total 836 larvae were stained by Alcian blue and Alizarin Red S. Total length of Newly hatched larvae length were 3.46±0.02 mm and end of the study it was 18.58±0.1 mm. Totally, 836 specimens were examined during the experiment but 1256 deformities were recorded in 270 deformed larvae. Also, skeletal deformity rate was calculated as 32% at the end of the study. Most viewed skeletal deformities were recorded as vertebral malformations (21.3%) and followed by vertebral fusion (18.6%) and lordosis (12.7). The highest amount of skeletal deformity was determined after notochord flexion stage (52.1%) in the study.

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