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Öğe Effect of some morphometric characteristics on egg quality in common dentex, Dentex dentex (Linnaeus, 1758) [Sinarit'lerde, Dentex dentex, yumurta kalitesi üzerine bazi morfometrik karakterlerin etkisi](2011) Çoban D.; Okan Kamaci H.; Süzer C.; Yildirim Ş.; Arda G.; Korkut A.Y.; Saka S.; Firat K.In this study, egg quality determination of common dentex (Dentex dentex) was investigated by using egg, yolk and oil globule diameter, from the first division to the hatching during natural and photoperiodic manipulation of spawning time. In the viable, floating eggs, the minimal and maximal diameter of the egg, yolk and oil globule were measured. Based on these measurements several parameters were calculated describing the shape of the egg, yolk and oil globule and the size relationship between these compartments. Hatching rate was calculated as 92% in natural spawning time (NST) and 64% photoperiodic manipulation of spawning time (PMST). Also, average egg diameter was measured as 0.949±0.038 mm in NST and 0.911±0.014 mm in PMST. In NST, egg diameter and yolk diameter of the eggs were significantly bigger than eggs in PMST (P<0.05). The morphometric parameters of oil globule could be accepted as an indicator for description of quality criteria of eggs. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.Öğe Effects of illumination intensity on growth parameters and swim bladder development in common dentex (Dentex dentex, L.) larvae [Işi{dotless}k yogunlugunun sinarit (Dentex dentex, L.) larvalari{dotless}nda büyüme parametreleri ve hava kesesi gelişimine olan etkileri](2013) Yildirim Ş.; Suzer C.; Çoban D.; Kamaci H.O.; Firat K.; Saka Ş.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. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.Öğe Effects of probiotic (Bacillus sp.) supplementation during larval development of gilthead sea bream (Sparus aurata, L.) [Probi·oti·k (Baci·llus sp.) eklenmesi·ni·n çipura (Sparus aurata, L.) larvalari·nda geli·si·me olan etkileri·](2013) Arig N.; Suzer C.; Gökvardar A.; Başaran F.; Çoban D.; Yildirim Ş.; Kamaci H.O.; Firat K.; Saka Ş.In this study, the effects of administration of commercial probiotic, Bacillus sp., were examined on growth parameters and digestive proteases (alkaline and acid proteases) activities in gilthead sea bream, Sparus aurata, during larval development until on day 40. Probiotics were supplemented in triplicate from on day 3 coinciding with starting of exogenous feeding. In the experimental group, probiotic was introduced to rotifer and tank water until 20 days after hatching. Also, control group did not receive probiotic. In experimental group, the specific activities of alkaline protease was significantly higher (p<0.05) in larvae compared to control group. Acid protease activity was not effected by probiotic supplementation however, it was relatively higher in experimental group than the control (P>0.05). Additionally, no significant differences were found in both survival (8.5% higher) and specific growth rate (0.7% higher) larvae of S. aurata that had probiotic supplemented by rotifer with water as compared to controls (P>0.05). Consequently, specific activities of alkaline and acid protease could be significantly increased by the administration of Bacillus sp. to live food with water the and therefore; this method would be more effective for obtaining of relatively better growth parameters and nutritional condition in S. aurata larvae. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.Öğe Skeletal deformities of cultured sharpsnout seabream (Diplodus puntazzo) larvae during early life development [Kültür koşullari{dotless}ndaki sivriburun karagöz (Diplodus puntazzo) larvalari{dotless}nda erken dönem iskelet deformasyonlari{dotless}](Chartered Inst. of Building Services Engineers, 2014) Yildirim Ş.; Çoban D.; Süzer C.; Firat K.; Saka Ş.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.Öğe Stage–specific ontogeny of digestive enzymes in the cultured common dentex (Dentex dentex) larvae [Kültürü yapilan sinarit (Dentex dentex) larvalarinda sindirim enzimlerinin dönemsel gelişimi](Central Fisheries Research Inst, 2014) Suzer C.; Çoban D.; Yildirim Ş.; Hekimoğlu M.; Okan Kamacı H.; Firat K.; Saka Ş.Stage-specific ontogeny of main digestive enzymes in common dentex, Dentex dentex, were assayed during early life development according to notochord flexion studied from hatching to 45 days after hatching (DAH). The notochord was straight in yolk-sac larvae of D. dentex and preflexion stage was observed between 0 and 18 DAH as 2.75 and 6.27 mm at total length (TL). Then, flexion of the notochord was estimated between 19 and 30 DAH as 6.27 and 10.9 mm at TL. Important alterations in specific activities of all digestive enzymes measured during period of this study were mostly related with metamorphosis and co-feeding. Trypsin and chymotrypsin specific activities were firstly detected on day 3 and were related with mouth opening, whereas they slightly increased until 25 DAH respectively. Pepsin was firstly detected on day 28 and related with stomach formation and a sharp increase was observed until 30 DAH. Both amylase and lipase were measured on day 2 and 4, respectively and they also sharply increased during the first week of life. Additionally, except pepsin, most of the digestive enzyme activities were firstly secreted in the preflexion stage and also gastric secretion started and functional development digestive system were occurred in in flexion and postflexion stages, respectively. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.
