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Öğe Effect of L-Carnitine on Colour, Digestive Enzymes and Growth of the Electric Yellow Cichlid, Labidochromis caeruleus(Zoological Soc Pakistan, 2023) Hekimoglu, Muge Aliye; Sonmez, SirmaThis 40-day feeding trial was aimed to determine the effective rate of L-carnitine on the growth of electric yellow cichlid (Labidochromis caeruleus) fry (n: 395, initial weight:0,46 g, initial length: 2.5 cm). They were randomly placed in 50 l aquariums. Based on the basal diet (55% crude protein+14% oil), the four experimental diets were designed with supplementation of L-carnitine (0, 500, 1000, 2000 mg/kg). They were fed 10% of their weight every day. Sampling was done at the beginning and the final day of the experiment for digestive enzymes (protease, lipase, amylase), weight and length, body colour and survival rate. The image analysis method was used to determine skin colour. The chemical analysis method was used to determine the activity of enzymes. The results showed that supplementation of 2000 mg/kg of dietary significantly increased weight, length and specific growth rate (P < 0.05). While no change in colour was observed in the control group at the end of the experiment, it was determined that carnitine could have a 27% effect on the colour change of fish in the other groups. Better results were obtained between the L-carnitine groups compared to the control group for in terms of digestive enzymes, while and the difference between the groups was found to be statistically significant (p <= 0.05). The results show that L-carnitine did not play an important role in the survival of fish. As a result, the addition of L-carnitine to fish feed positively affects the growth of fish and as expected, the growth of fish increases as the amount of L-carnitine in the feed increases.Öğe Effect of Supplemented Algal Carotenoid Diets on Skin Color of Tomato Clownfish, Amphiprion frenatus(Zoological Soc Pakistan, 2017) Hekimoglu, Muge Aliye; Firat, Kursat; Saka, Sahin; Suzer, Cuney; Kop, Aysun; Durmaz, YasarThis study analyzes the effect of Nannochloropsis oculata and Porphyridium cruentum as natural pigment sources on skin color of tomato clownfish, Amphiprion frenatus. Two groups, each of 6 fish were fed on feed containing (69.8 +/- 9.158 mg.g(-1))N oculata (Group A), and 67.21 +/- 7.068 mg.g(-1) of P. cruentum (Group B). The third group (Group C) was fed on control basal diet (34.93 +/- 29.07 mg.g(-1)). Total carotenoid content of fish skin was determined at 30-day intervals. At the end of the experiment the highest weight gain was found to be 1.73 +/- 0.37g in Group B, whereas the lowest performance (1.29 +/- 0.38 g) was received in Group C. The best feed conversion ratio was found in at Group B. The total carotenoid content of skin of fish were found to be 0.77 +/- 0.61 ug.g(-1) on the initial day in the experimental group. As a result of the measurements performed on the 120(th) day, the pigment values were determined as 30.39 +/- 0.39 mu g.g(-1) in Group A, 39.07 +/- 1.12 mu g.g(-1) in Group B and 35.68 +/- 10.69 mu g.g(-1) in the Group C. Group B pigment source is more effective on the color of tomato clownfish A. frenatus.Öğe Enzymatic Characteristics and Growth Parameters of Ornamental Koi Carp (Cyprinus carpio var. Koi) Larvae Fed by Artemia Nauplii and Cysts(Central Fisheries Research Inst, 2014) Hekimoglu, Muge Aliye; Suzer, Cuneyt; Saka, Sahin; Firat, KursatThe purpose of this study was to compare the larval growth and digestive enzyme activities of koi carp (Cyprinus carpio var. Koi) larvae fed on Artemia nauplii (AN) and decapsulated cyst (ADC). The experiment was carried out in triplicate and lasted 27 days. Specific growth and survival rates, specific activities of total protease, lipase, amylase and chitinase were examined in experimental groups. At the end of the experiment for group fed with AN total length, weight and SGR were 20.56 +/- 3.23 mm, 0.9 +/- 0.05 g and 2.03 % d(-1), respectively and for group fed with ADC it was 28.16 +/- 4.81 mm, 0.28 +/- 0.16 g and 6.02 d (1) (P<0.05). However, survival rates in the group fed on ADC was 98.88 % while in the group fed on AN was 97.77 % (P>0.05). Besides, there were significant differences on specific enzyme activities (total protease, amylase, chitinase, lipase) (P<0.05). Obtained results suggested that koi larvae fed by ADC presented relatively higher growth parameters.Öğe Enzymatic, skeletal, and histological ontogeny of shi drum (Umbrina cirrosa) larvae under intensive culture conditions (vol 49, 351, 2023)(Springer, 2023) Karacaoglan, Arif; Firat, Kursat; Hekimoglu, Muge Aliye; Saka, Sahin; Suzer, Cuneyt; Midilli, Sema; Kirim, Birsen[No abstract available]Öğe Evaluation of occupational health and safety risk factors in Turkish marine fish hatcheries(Taylor & Francis Ltd, 2022) Uyumsal, Selcuk; Firat, M. Kursat; Saka, Sahin; Suzer, Cuneyt; Hekimoglu, Muge Aliye; Saygi, Hulya; Turk, MeralIn this study, the approaches of employees in marine fish hatcheries to occupational health and safety were determined. Cronbach's alpha coefficient was calculated as 0.858 in the reliability of the scale and scale factors based on internal consistency. In addition,factor analysis according to the varimax method was found to be approximately 64%. It was determined that 68% of the employees were not aware of the relevant laws. In addition,85% of the employees are aware of the dangers and risks in their workplaces. In the event of a negative situation in the workplace,the rate of those who know their legal rights is 73% (p <= 0.05). In addition,91% of the employees stated that they would use their right to object in a risky situation and quit the job. Sixty per cent of the employees stated that their jobs can satisfy them sociologically and economically throughout their life.Öğe Sedative Effect of Clove Oil and 2-Phenoxyethanol on Marine Clownfish (Amphiprion ocellaris) and Freshwater Swordfish (Xiphophorus helleri)(Zoological Soc Pakistan, 2017) Hekimoglu, Muge Aliye; Suzer, Cuneyt; Saka, Sahin; Firat, KursatThis study's objective was to determine effect of two different anaesthetics 2-phenoxyethanol and clove oil on the sedation of some aquarium fish species. The induction and recovery times were determined at five stages of melanistic and not melanistic clownfish (Amphiprion ocellaris) and different sexes of Swordfish (Xiphophorus helleri). Clownfish were tested with 0.4, 0.6 and 0.8 ml/l phenoxyethanol and 0.5, 1 and 1.5 ml/l clove oil. Swordfish were tested with 1, 3 and 5 ml/I phenoxyethanol and 2, 4, 6 ml/l clove oil. For short-term application the safe dose for clownfish was 0.4 ml/l phenoxyethanol and 1 ml/l clove oil. For swordtail fish, the ideal amount of phenoxyethanol was 5 ml/l and 6 ml/l clove oil. These safe doses reduce handling stress and mortality.
