Skeletal deformities of cultured sharpsnout seabream (Diplodus puntazzo) larvae during early life development

Abstract

In this study, skeletal deformities were investigated during early life stages in sharpsnout seabream, Diplodus puntazzo, larvae during larval development period. Whole larval period (1-42 days after hatching, DAH) was examined in three stages (preflexion, flexion and postflexion) based on notochord curve. Totally, 1210 specimens were examined during the experiment but 689 deformities were recorded in 256 larvae. Also, deformity rate was calculated as 21.2% at the end of the experiment. In terms of notochord flexion at stage-specific, no differences were found between preflexion (19.7%) and postflexion (15.8%) stages (p>0.05) while there was a significant difference during flexion stage (32.8%) in comparison with other groups (p<0.05). Correspondence analysis (CA) was performed in order to describe of skeletal deformities mainly depend on notochord flexion. According to CA analysis, it was determined that deformities were closely related with both flexion stages quantitatively and also postflexion stages qualitatively

Keywords

• D. puntazzo
• larval development
• skeletal deformities
• notochord flexion

Kültür koşullarındaki sivriburun karagöz (Diplodus puntazzo) larvalarında erken dönem iskeletdeformasyonları

Abstract

Bu çalışmada, yetiştiriciliği yapılan sivriburun karagöz (Diplodus puntazzo) larvalarının erken hayat döngüsü içerisinde iskelet sisteminde meydana gelen deformasyonlar incelenmiştir. Deneme boyunca larval dönem (1-42 gün) notokorda da meydana gelen değişimlere göre üç bölüme ayrılmıştır (bükülme öncesi, bükülme sırası ve bükülme sonrası). Deneme boyunca toplamda 1210 larva incelenmiş ve 256 deforme larvada 689 iskelet deformasyonu tespit edilmiştir. Deneme sonunda deformasyon oranı %21,2 hesaplanmıştır. Larval dönemdeki safhalara göre deformasyon oranları bükülme öncesi (%19,7) ile bükülme sonrası (%15,8) önemsiz bulunurken (p>0,05), bükülme sırası (%32,8) evresi önemlilik arz etmiştir (p<0,05). Notokordaya göre iskelet deformasyonları Korrespond Analiz yöntemi kullanılarak yapılmıştır. Bu analiz yöntemine göre iskelet deformasyonları safhalar arasında hem niteliksel olarak farklılıkları ortaya koymuş hem de bükülme sonrası dönemde niceliksel ayrımı belirtmiştir

Keywords

• D. puntazzo
• larval gelişim
• iskelet deformasyonu
• notokorda bükülmesi

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