Browsing by Author "Guerrera, Maria Cristina"

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Correction to: Effects of heavy pollution in different water bodies on male rainbow trout (Oncorhynchus mykiss) reproductive health.
(2023-02-01T00:00:00Z) Bhat, Rayees Ahmad; Saoca, Concetta; Cravana, Cristina; Fazio, Francesco; Guerrera, Maria Cristina; Labh, Shyam Narayan; Kesbiç, Osman Sabri
Effects of heavy pollution in different water bodies on male rainbow trout (Oncorhynchus mykiss) reproductive health.
(2023-02-01T00:00:00Z) Bhat, Rayees Ahmad; Saoca, Concetta; Cravana, Cristina; Fazio, Francesco; Guerrera, Maria Cristina; Labh, Shyam Narayan; Kesbiç, Osman Sabri
This research aimed to investigate the influence of heavy metals on the reproductive health of rainbow trout (Oncorhynchus mykiss) captured from two locations, Verinag (S1) and Panzath (S2). Sixty (n. 60) mature rainbow trout samples (30 from each site) with body weights ranging from 400 to 650 g were collected from Verinag hatchery, which was less polluted (S1), and Panzath hatchery, which was more polluted (S2). The findings revealed significant differences between the two sites, S1 (less polluted) and S2 (more polluted), as well as significant variations within the tissues. Iron (Fe) and Zinc (Zn) were found to be highest in sampling water as well as in fish tissues sampled from S2 sites. Similarly, concerning S1 captured fishes, histopathological examination of testes from S2 captured fish was found. Testicular abnormalities that included disorganization of the seminiferous tubules, reduction in the number of germ cells (sperm cells, spermatozoa), vacuolization, and large empty areas in the seminiferous epithelium were found. In testicular cells, the frequency of apoptotic cells collected from S2 water increased significantly (P < 0.05). SOD, catalase, and glutathione peroxidase activity increased in S1 captured fishes but decreased in S2 captured fishes. MDA levels gradually increased in S2 captured fish, and the degree of heavy metal stress was positively correlated (P < 0.05). In male rainbow trout, testosterone and 11-ketotestosterone levels increased substantially in S1 captured fishes. While the fatty acids of testes in S2 fishes decreased with respect to S1 fishes. In conclusion, S2 captured fish suffered more damage due to heavy metals including cellular damage, apoptosis, oxidative damage, and altered steroid hormones when compared to fish from S1 waters.
Effects of Tomato Paste By-Product Extract on Growth Performance and Blood Parameters in Common Carp ().
(2022-12-01T00:00:00Z) Kesbiç, Osman Sabri; Acar, Ümit; Hassaan, Mohamed Shaban; Yılmaz, Sevdan; Guerrera, Maria Cristina; Fazio, Francesco
This research examined different growth performances and blood parameters of common carp (Cyprinus carpio) consuming diets supplemented with tomato paste by-product extract (TPE). Five diets with different concentrations of TPEs, 0% (TPE0) 0.5% (TPE0.5), 1% (TPE1), 2% (TPE2), and 5% (TPE5) were supplied to 300 common carp (8.38 ± 0.18 g) (60 fish per group) each day during the 60-day feeding trial. The relative and specific growth rates of fish-fed supplemental diets increased significantly, while the feed conversion ratio significantly decreased (p < 0.05). TPE considerably increased the erythrocyte count (RBC), hemoglobin content (Hb), and hematocrit (Hct) (p < 0.05), according to hematological analyses of blood samples collected after the feeding experiment. The blood biochemical findings indicate that using 1% or more extracts considerably reduced the serum glucose, cholesterol, and triglyceride ratios while significantly increasing the total protein, albumin, and globulin ratios in common carp (p < 0.05). Based on the findings of the study, it was concluded that the 2% extract generated from tomato paste by-products in common carp diets could be utilized as a growth-promoting product without any negative effects on blood parameters linked to feeding in carp.
Toxic effect of heavy metals on ovarian deformities, apoptotic changes, oxidative stress, and steroid hormones in rainbow trout.
(2023-01-01T00:00:00Z) Bhat, Rayees Ahmad; Bakhshalizadeh, Shima; Guerrera, Maria Cristina; Kesbiç, Osman Sabri; Fazio, Francesco
As is well known, the pollution in the aquatic environment in which fish grow has a direct impact on aquaculture practices. Pollution in aquatic systems because of multiple adverse effects on fish metabolic processes, especially the reproductive systems.