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- W2026932391 endingPage "98" @default.
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- W2026932391 abstract "The study of melatonin is of great importance for the fundamental knowledge of any living system since it displays many different physiological roles, including being a potent natural antioxidant. To the best of our knowledge, there is no information regarding melatonin in fish seminal plasma. This study aimed to determine this clock-hormone levels in the seminal plasma of three aquaculture fish species: European seabass (Dicentrarchus labrax), gilthead seabream (Sparus aurata), and Senegalese sole (Solea senegalensis) (both wild and F1 breeders), and to explore melatonin potential role in fish reproduction and spermatozoa antioxidant status. Blood and seminal plasma were collected from fish during their reproductive season, at two different times of the day [mid-light (ML) and mid-dark (MD)], and melatonin concentration was determined by radioimmunoassay (RIA). Testosterone (T), 11-ketotestosterone (11KT), and total antioxidant status (TAS) were also determined, to investigate the putative role of seminal melatonin in fish reproduction, both at endocrine and antioxidant levels. For each species, Pearson's correlation analysis was performed between all possible factors. Blood plasma melatonin showed higher average values at night in the three species: gilthead seabream (808 ± 139 pg/mL), European seabass (364 ± 85 pg/mL), and Senegalese sole (248 ± 40 and 88 ± 11 pg/mL in F1 and wild males, respectively). However, melatonin levels in seminal plasma were species-specific: in European seabass, melatonin levels were not detectable at any time-point, whereas in gilthead seabream it was only found at MD (average of 21 pg/mL), and in Senegalese sole, different melatonin patterns were observed between F1 and wild males, but both had higher melatonin at MD (6.84 and 14.26 pg/mL, respectively). In gilthead seabream, at MD seminal melatonin levels correlated with the antioxidant status of seminal plasma. A relationship between blood melatonin and seminal TAS levels was observed in European seabass at ML: in this species, seminal melatonin could not be detected and the lowest seminal TAS levels were found. Regarding steroid analysis, opposite patterns in the seminal plasma of F1 and wild Senegalese sole were observed: at MD, wild Senegalese sole had substantially greater 11KT levels (2.53 ng/mL), whereas F1 males had higher T levels (1.92 ng/mL). In gilthead seabream, a positive correlation between T and ML blood melatonin and seminal TAS was observed. This study unraveled the species-specificity and daily changes of melatonin in fish seminal plasma." @default.
- W2026932391 created "2016-06-24" @default.
- W2026932391 creator A5012853030 @default.
- W2026932391 creator A5020018526 @default.
- W2026932391 creator A5074965709 @default.
- W2026932391 date "2001-06-01" @default.
- W2026932391 modified "2023-10-10" @default.
- W2026932391 title "The environmental regulation of maturation in farmed finfish with special reference to the role of photoperiod and melatonin" @default.
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