Su Ürünleri Yetiştiriciliği
https://hdl.handle.net/20.500.12508/73
Aquaculture Farming2024-03-28T15:58:24ZEffect of biofloc technology in Farfantepenaeus aztecus culture: The optimization of dietary protein level on growth performance, digestive enzyme activity, non-specific immune response, and intestinal microbiota
https://hdl.handle.net/20.500.12508/3023
Effect of biofloc technology in Farfantepenaeus aztecus culture: The optimization of dietary protein level on growth performance, digestive enzyme activity, non-specific immune response, and intestinal microbiota
Genç, Ercüment; Kaya, Doğukan; Genç, Münevver Ayçe; Keskin, Emre; Yavuzcan, Hijran; Güroy, Derya; Gürler, Ahmet; Yaraş, Koray Umut; Pipilos, Atakan; Özbek, Berna Funda; Yılmaz, Bilgenur Harmansa; Aktaş, Mevlüt
In this study, a biofloc technology (BFT) based 90-day feeding trial was performed to estimate the effects of four different dietary protein levels (290, 320, 350 and 380 g protein kg(-1) diet; 29P, 32P, 35P, and 38P, respectively) on growth performance, digestive enzyme activity, non-specific immune response, whole-body proximate and fatty acid composition and intestinal microbiota of Farfantepenaeus aztecus. Final weight, weight gain, and specific growth rate improved with protein levels up to 35P per kg of diet, below which decreased significantly. Significant differences were observed in total hemocyte count, acid phosphatase, respiratory burst, glutathione, alkaline phosphatase, and total antioxidant capacity indices of shrimp fed different dietary protein levels. Protease, lipase, and amylase activities of shrimp were also affected by dietary protein levels. Proteobacteria was the most abundant bacteria among the groups. Overall, this study revealed that using 35% dietary protein is optimal in F. aztecus culture under environmentally friendly BFT conditions. Furthermore, these results provide a theoretical basis for future research on the evaluation of functional ingredients in diet for more economical production of F. aztecus at optimal protein levels.
2023-01-01T00:00:00ZDetermination of Sizes at First Maturity and Reproductive Period of Freshwater Mussel Unio terminalis in Gölbaşı Lake (Hatay), Turkey
https://hdl.handle.net/20.500.12508/3022
Determination of Sizes at First Maturity and Reproductive Period of Freshwater Mussel Unio terminalis in Gölbaşı Lake (Hatay), Turkey
Şereflişan, Hülya; Gökçe, Mahmut Ali
In this study, reproductive characteristics of freshwater mussels (Unio terminalis) were determined according to months. Freshwater mussels, which are the research material of this study, were obtained from G & ouml;lba & scedil;& imath; Lake (Hatay). The mean length, width, height and weight of individuals sampled from the lake were 7.82 +/- 0.52 cm, 3.98 +/- 0.26 cm, 2.88 +/- 0.24 cm, and 42.28 g, respectively. When the gonad development of the species was examined on a monthly basis, it was determined that the gonads developed between December and February, and the release of glochidia occurred in January and February. During the breeding period, the length at first sexual maturity was investigated according to the determined length groups. 400 mussel samples of different sizes were collected randomly from the lake at a time, and the length, gill length and thickness were measured. The gonads of the mussels were visually and dimensionally examined. Length at first maturity is accepted as the size at which 50% of the mussels mature. In both sexes, there were no mature individuals in the 3.50-3.99 cm size group, but maturation started from 4.00-4.49 cm in males and 4.50-4.99 cm in female individuals. The size at which 50% of the individuals reached sexual maturity (Lm = 50%) for males and females were 6.10 cm and 6.00 cm, respectively, thus it was found that the female mussels reach sexual maturity at a slightly lower size. It was also determined that 100% of male and female individuals attain sexual maturity when they reach 7.50-7.99 cm in length.
2023-01-01T00:00:00ZThe Changes in Biochemical Compositions of Five Different Macroalgae and Seagrass (Halophila stipulacea (Forsskal) Ascherson 1867) Collected from Iskenderun Bay
https://hdl.handle.net/20.500.12508/2989
The Changes in Biochemical Compositions of Five Different Macroalgae and Seagrass (Halophila stipulacea (Forsskal) Ascherson 1867) Collected from Iskenderun Bay
Naz, Mehmet; Sayin, Selin; Çetin, Zafer; Saygılı, Eyüp İlker; Taşkin, Ergün; Soyler, Oktay
In present study, biochemical compositions (ash, lipid and protein) of five different macroalgae ((Green Macroalgae-GMA (Chaetomorpha linum and Caulerpa prolifera), Red Macroalgae-RMA (Pterocladiella capi-lacea), Brown Macroalgae-BMA (Sargassum vulgare and Ericaria amentacea)) and Angiosperm/Seagrass (Hal-ophila stipulacea) collected from Iskenderun Bay were investigated. The differences observed between biochemical compositions such as ash, lipid and protein of five macroalgae species and Angiosperm/Seagrass (Halophila stip-ulacea) were statistically significant (p<0.05). The lowest and highest ash, lipid and protein values of five macroalgae were 12.19±1.15% (Caulerpa prolifera)- 21.38±1.53% (Ericaria amentacea), 1.74±0.19% (Caulerpa prolifera)- 5.83±0.68% (Ericaria amentacea), 5.56±0.06% (Chaetomorpha linum)- 11.45±0.53% (Sargassum vulgare), respec-tively. Ash, lipid and protein values of Angiosperms/Seagrass (Halophila stipulacea) were determined as 14.56±2.08%, 3.16±0.48% and 8.11±0.07%, respectively. Protein value of Angiosperms/Seagrass (Halophila stipulacea) was higher than those of (GMA (Chaetomorpha linum and Caulerpa prolifera) but not RMA(Pterocladiella capillacea) and BMA (Sargassum vulgare and Ericaria amentacea)). Lipid value of Angio-sperms/Seagrass (Halophila stipulacea) was similar to RMA(Pterocladiella capillacea). In conclusion, the information of the biochemical compositions of five different macroalgae and Angiosperms/Seagrass (Halophila stipulacea) are important for the evaluation of potential sources for commercial and human consumption. In addition, biochemical compositions of tested macroalgae and seagrass could make important contributions to feed formulations and functional foods in future.
2022-01-01T00:00:00ZNovel data on genotoxic assessment of bismuth sulfide nanoflowers in common carp Cyprinus carpio
https://hdl.handle.net/20.500.12508/2984
Novel data on genotoxic assessment of bismuth sulfide nanoflowers in common carp Cyprinus carpio
Ergenler, Ayşegül; Turan, Funda; Zaman, Buse Tuğba; Tezgin, Emine; Bakırdere, Sezgin; Depci, Tolga
The environmental impacts and risks of nanomaterials that are commonly used in different technologies are of great concern as their toxic effects on the aquatic ecosystem remain unclear. In this study, bismuth sulfide (Bi2S3) nanoflowers (nfs) were synthesized using a microwave-based hydrothermal process, and their genotoxic effects were investigated in the common carp, Cyprinus carpio. Bi2S3 nanoflowers were applied to common carp for 96 h. LC50 value (LC50 = 350 mg/L−1) was determined for acute toxicity with probit analysis, and three sublethal concentrations (35, 87, and 175 mg/L−1) were selected accordingly for genotoxicity tests. Such LC50 value − 350 mg L−1 for the common carp makes these nanoflowers non-toxic to aquatic organisms according to the EU-Directive 93/67/EEC classification scheme. Toxicological evaluations of the sublethal concentrations of Bi2S3 nanoflowers demonstrated that the 35 and 87 mg L−1 Bi2S3nfs groups were generally harmless and similar to the control group. Only the 175 mg L−1 Bi2S3nfs group had significant DNA damage frequency and nuclear abnormalities than the control and other Bi2S3nfs groups. To the best of our knowledge, this is a novel data on genotoxicity reported for fish species exposed to Bi2S3 nanoflowers; however, further systematic studies need to be performed to fully estimate the effects of Bi2S3 nanoflowers on aquatic life.
2023-01-01T00:00:00Z