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Öğe Effect of Different Media on Short Term Storage of Leaping Mullet (Liza saliens (Risso, 1810)) Sperm(2020) Engin, Serhat; Fırat, M. Kürşat; Ozden, Osman; Suzer, Cüneyt; Hekimoğlu, Müge; Antepli, Onurkan; Saka, ŞahinThe present study aimed to evaluate the activation characteristics of the leaping mullet spermatozoa and diluted with four different media (D1, D2, D3, D4) for 250 h at 4±2°C. The semen was collected from nine wild fish in Homa Lagoon, İzmir, Turkey in July, during reproductive season. In each trial (n = 9), semen samples were collected and mixed to reduce sperm quality variation to obtain the required gametes for the experiment. The semen was activated with natural seawater (salinity of 34, pH 7.9 and 4±2°C) to determine: motility time, motility rate and viability of sperm. Dilution with inactivation media 1:3 increased motility time of diluted semen than control group. At the end of the experiment, no significant difference was found for the duration of survival in the D2 and D4 groups. The highest survival rate was found in D2 groupÖğe Effect of Different Media on Short Term Storage of Leaping Mullet (Liza saliens (Risso, 1810)) Sperm(2020) Engin, Serhat; Fırat, M. Kürşat; Ozden, Osman; Suzer, Cüneyt; Hekimoğlu, Müge; Antepli, Onurkan; Saka, ŞahinThe present study aimed to evaluate the activation characteristics of the leaping mullet spermatozoa and diluted with four different media (D1, D2, D3, D4) for 250 h at 4±2°C. the semen was collected from nine wild fish in Homa Lagoon, İzmir, Turkey in July, during reproductive season. in each trial (n = 9), semen samples were collected and mixed to reduce sperm quality variation to obtain the required gametes for the experiment. the semen was activated with natural seawater (salinity of 34, pH 7.9 and 4±2°C) to determine: motility time, motility rate and viability of sperm. Dilution with inactivation media 1:3 increased motility time of diluted semen than control group. At the end of the experiment, no significant difference was found for the duration of survival in the D2 and D4 groups. the highest survival rate was found in D2 groupÖğe Effects of 17ß-estradiol Hormone on Growth and Sex Differentiation in the Mozambique Tilapia (Oreochromis mossambicus, Peters, 1852)(2019) Saylık, Fatma Zeynep; Fırat, Muamer Kürşat; Süzer, Cüneyt; Engin, Serhat; Hekimoğlu, Müge; Sayğı, Hülya; Gulec, FatıhIn this study, the effects of 17-ß-estradiol hormone on the zootechnic performances and sex ratio of Mozambique Tilapia (Oreochromis mossambicus. Peters, 1852) fry were investigated in order to initially produce functional phenotypical females and then super males. To this end, different E2 concentrations (50, 100, 150 and 200 ppm) were tested over a period of 45 days in a closed recirculating system. the evaluations showed that the female ratio was significantly (p value= 0.04 and ?=0.05) higher in all treatment groups ranging from 61.90% to 86.36% compared to the control group. Growth was significantly higher (F value=22.78 and p value=0.00) in the control group compared to the treatment ones.Öğe Effects of 17ß-estradiol Hormone on Growth and Sex Differentiation in the Mozambique Tilapia (Oreochromis mossambicus, Peters, 1852)(2019) Saylık, Fatma Zeynep; Fırat, Muamer Kürşat; Süzer, Cüneyt; Engin, Serhat; Hekimoğlu, Müge; Sayğı, Hülya; Saka, ŞahinIn this study, the effects of 17-ß-estradiol hormone on the zootechnic performances and sex ratio of Mozambique Tilapia (Oreochromis mossambicus. Peters, 1852) fry were investigated in order to initially produce functional phenotypical females and then super males. To this end, different E2 concentrations (50, 100, 150 and 200 ppm) were tested over a period of 45 days in a closed recirculating system. The evaluations showed that the female ratio was significantly (p value= 0.04 and ?=0.05) higher in all treatment groups ranging from 61.90% to 86.36% compared to the control group. Growth was significantly higher (F value=22.78 and p value=0.00) in the control group compared to the treatment ones.Öğe Effects of Water Temperature on Sex Differentiation and Growth Parameters of the Mozambique Tilapia (Oreochromis mossambicus, Peters, 1852)(2019) Koyakomanda, Karl Christofer Kingueleoua; Fırat, Muamer Kürşat; Süzer, Cüneyt; Engin, Serhat; Hekimoğlu, Müge; Sayğı, Hülya; Saka, ŞahinIn this study, the effects of water temperature on growth, survival rate, gonad development and sex ratios of Mozambique Tilapia (Oreochromis mossambicus) were studied by applying different temperature applications (28, 30, 32, 34 and 36oC) for a single period of 40 days. At the end of the study, in the control group (28oC), the males proportion was 47.62%. In fishes reared at 30oC, average male ratio was found as 73.68%. The highest male proportion was obtained in the 36oC temperature group (86.67%). Growth performances, feed utilization and gonad development were found to increase with elevating temperatures up to 34oC unlike the survival rate which has been found to fall with higher temperatures. In this study, sex differentiation rates differed significantly between all groups (p<0.05). However, the highest male rate obtained in group A and D. As hypothesized, results suggest that fish performed better at 30-32°C than 28°C or 34-36°C water temperature and the optimum temperature for a better expression of growth parameters in Mozambique Tilapia could be 30oC.Öğe Effects of Water Temperature on Sex Differentiation and Growth Parameters of the Mozambique Tilapia (Oreochromis mossambicus, Peters, 1852)(2019) Koyakomanda, Karl Christofer Kingueleoua; Fırat, Muamer Kürşat; Süzer, Cüneyt; Engin, Serhat; Hekimoğlu, Müge; Sayğı, Hülya; Gulec, FatıhIn this study, the effects of water temperature on growth, survival rate, gonad development and sex ratios of Mozambique Tilapia (Oreochromis mossambicus) were studied by applying different temperature applications (28, 30, 32, 34 and 36oC) for a single period of 40 days. At the end of the study, in the control group (28oC), the males proportion was 47.62%. in fishes reared at 30oC, average male ratio was found as 73.68%. the highest male proportion was obtained in the 36oC temperature group (86.67%). Growth performances, feed utilization and gonad development were found to increase with elevating temperatures up to 34oC unlike the survival rate which has been found to fall with higher temperatures. in this study, sex differentiation rates differed significantly between all groups (p<0.05). However, the highest male rate obtained in group A and D. As hypothesized, results suggest that fish performed better at 30-32°C than 28°C or 34-36°C water temperature and the optimum temperature for a better expression of growth parameters in Mozambique Tilapia could be 30oC.Öğe Palyaço balıkları (Amphiprion frenatus Brevoort, 1856) yavrularının beslenmesinde kullanılan alglerin vücut rengine etkisi(Ege Üniversitesi, 2015) Kop, Aysun; Çoban, Deniz; Durmaz, Yaşar; Hekimoğlu, MügeOrnamental fish, algae, pigment, clown fish Amphiprion frenatus, Porphyridium cruentum, Nannochloropsis oculata.;Palyaço balıkları (Amphiprion frenatus) denizden avcılığının yanı sıra deniz akvaryumlarına yetiştiricilik yoluyla alınan ilk türlerdendir. Kontrollü şartlarda ve kapalı ortamlarda üretimi yapılan deniz balıklarının vücut renklerinin doğal ortamlarında olduğu gibi parlaklığını koruması pek başarılı olmamaktadır. Bu çalışmada doğal renk kaynaklarından olduğu bilinen bazı alglerden elde edilen ektratlar yeme ilave edildi. Porphyridium cruentum, Nannochloropsis oculata ve alg katılmamış kontrol yemleri kullanıldı. Çalışmanın sonucunda P. cruentum alginden elde edilen ekstratla hazırlanan yemlerin, 39.07±1.12 mg.g-1 oranında N. oculata'ya ve alg katılmamış kontrol yemine göre balıkların renk parlaklığına diğerlerine nazaran daha fazla katkıda bulunduğu tespit edildi.;Süs balıkları, alg, pigment, Amphiprion frenatus, Porphyridium cruentum, Nannochloropsis oculata.Öğe Raising the Performance of Gilthead Seabream (Sparus aurata) Juvenile in Offshore Cage Culture(2020) Suzer, Cüneyt; Saka, Şahin; Hekimoğlu, Müge; Fırat, Fatih Kürşat; Akpınar, AliThe growth parameters of gilthead seabream (Sparus aurata) fry supplied from three different hatcheries stocked in nine HDPE offshore cages (30 m diameter and 22 m depth) were investigated for 450 days. It was determined that the fish obtained from Firm A on the 450th day gained more weight by consuming less feed. Fishes belonging to Firm A consumed an average of 1.8 kg of feed for one kg body weight gain, while fishes belonging to Firm B consumed an average of 2.29 kg and fishes of Firm C consumed an average of 2.18 kg. However, feed conversion rates were not significant between firms. Also, the highest survival rate was determined in fish from Firm B with 96.11%. As a result, the success of fish culture should be guaranteed by the supply of high standard juvenile fish. Otherwise, production costs and fish quality will be adversely affected.
