Effects of Illumination Intensity on Growth Parameters and Swim Bladder Development in Common dentex (Dentex dentex, L.) Larvae

Year 2013, , - , 01.08.2013

Şükrü Yıldırım Cüneyt Suzer Deniz Çoban H. Okan Kamacı Kürşat Fırat Şahin Saka

https://doi.org/10.4194/1303-2712-v13_4_11

Abstract

The influences of three different light intensities were investigated on growth of common dentex (Dentex dentex) during larval period (0-35 day). Three different illumination levels were compared that 10 lx as group A, 30 lx described group B and 100 lx named group C in triplicates, respectively. Larvae were cultured in a recirculating aquaculture system using a green water technique. The longest total length and the heaviest weight were found as 18.43±1.9 mm and 38.48±5.1 mg in group B with 30 lx light intensity. Same parameters were 18.03±2.5 mm and 36.72±4.8 mg for group C with 100 lx light intensity; 16.23±1.7 mm and 28.53±4.2 mg for group A with 10 lx light intensity. In terms of total length and weight, there were significant differences in group A (P<0.05), however, differences were not detected between B and C groups (P>0.05). Also, swim bladder inflation rates were calculated as 88.3±2.7, 92.1±1.6 and 91.4±1.3% for groups A, B and C, respectively and did not presented significant differences among groups (P>0.05). In addition, survival rates were 8.8±3.1, 23.5±2.5 and 19.9±2.8%, respectively. While not significant differences were found between group B and C (P>0.05), but group A presented significantly difference compared to other groups (P<0.05). As a result, it is thought that illumination effected husbandry parameters were more affirmative with 30 lx light intensity in Dentex dentex under culture conditions.

Keywords

Illumination, larval growth, swim bladder, survival rate, common dentex, Dentex dentex. Işık Yoğunluğunun Sinarit (Dentex dentex, L.) Larvalarında Büyüme Parametreleri ve Hava Kesesi Gelişimine Olan Etkileri

Effects of Illumination Intensity on Growth Parameters and Swim Bladder Development in Common dentex (Dentex dentex, L.) Larvae

Abstract

Bu çalışmada 3 farklı ışık yoğunluğunun üretim periyodu boyunca (0-35 gün) sinarit (Dentex dentex) larvalarının büyümesine olan etkileri incelenmiştir. 3 tekrarlı yürütülen denemede 3 farklı ışık yoğunluğu karşılaştırılmış ve sırasıyla 10 lux A grubu, 30 lux B grubu ve 100 lux C grubu olarak tanımlanmıştır. Larvalar yeşil su tekniği kullanılarak akışkanlı sistemde üretilmiştir. En yüksek total boy 18,43±1,9 mm ve 38,48±5,1 mg ağırlık değerleri olarak 30 lux uygulanan B grubunda bulunmuştur. Aynı parametreler 100 lux denenen C grubunda 18,03±2,5 mm ve 36,72±4,8 mg, 10 lux uygulanan A grubunda ise 16,23±1,7 mm ve 28,53±4,2 mg olarak ölçülmüştür. Boyca büyüme ve ağırlık artışı açısından, A grubu farklı bulunmuş (P<0,05), ancak B ve C grubu arasında önemli farklılıklar tespit edilmemiştir (P>0,05). Bunun yanında, hava kesesi gelişim oranları A, B ve C grupları için sırasıyla %88.3±2,7, 92,1±1.6 ve 91.,4±1,3 olarak hesaplanmış, ancak gruplar arasında önemli bir farklılık göstermemiştir (P>0,05). Ek olarak, yaşama oranları gruplara göre sırasıyla %8,8±3,1, 23,5±2,5 ve 19,9±2,8 olarak hesaplanmıştır. B ve C grubu arasında önemli farklılık tespit edilmez iken (P>0.05) A grubu diğer deneme gruplarına göre farklı bulunmuştur (P<0,05). Sonuç olarak, kültür koşulları altında farklı ışık yoğunlukları sinarit Dentex dentex larvalarının büyüme parametrelerini etkilemiş, 30 lux ışık yoğunluğunda daha olumlu sonuçlar tespit edilmiştir.

Keywords

Aydınlatma, larval büyüme, hava kesesi, yaşama oranı, sinarit, Dentex dentex.

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