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Turkish Journal of Fisheries and Aquatic Sciences 2013, Vol 13, Num, 4     (Pages: 657-663)

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

Şükrü Yıldırım 1 ,Cüneyt Suzer 1 ,Deniz Çoban 2 ,H. Okan Kamacı 1 ,Kürşat Fırat 1 ,Şahin Saka 1

1 Ege University, Faculty of Fisheries, Aquaculture Department, 35100 Bornova, Izmir, Turkey
2 Adnan Menderes University, Faculty of Agriculture, Department of Aquatic Biosciences, 09010 Aydın, Turkey
DOI : 10.4194/1303-2712-v13_4_11 Viewed : 2035 - Downloaded : 1865 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