Quantitative and Qualitative Assessment of European Catfish (Silurus glanis) Flesh

Abstract

Quantitative and qualitative flesh production in the Silurus glanis species was comparatively studied between two fish groups: one from aquaculture (AG) and the other from a natural environment, the Prut River (RG). Morphometry was carried out on the fish, and then biometric and conformational indices were calculated. Better values were found in the aquaculture catfish. The Fulton coefficient was 0.82 in the Prut River fish and 0.91% in the farmed ones. The fleshy index reached 19.58% in the AG fish and 20.79% in the RG fish, suggesting better productive capabilities in the AG fish. Postslaughter, the flesh yield and its quality were assessed at different moments throughout the refrigeration period (0–15 days), and chemical compound loss occurred. In the AG samples, the water content decreased by 8.87%, proteins by 27.66%, and lipids by 29.58%. For the RG samples, the loss reached 8.59% in water, 25.16% in proteins, and 29%in lipids. By studying the fatty acids profile and sanogenic indices, good levels of PUFA (31–35%) were found, and the atherogenic index reached 0.35–0.41 while the thrombogenic index ranged between 0.22 and 0.27. Consequently, it can be stated that fish origin and especially the refrigeration period influence the flesh proximate composition and nutritional value of European catfish.

Comparative Study of Flesh Quality, Blood Profile, Antioxidant Status, and Intestinal Microbiota of European Catfish (Silurus glanis) Cultivated in a Recirculating Aquaculture System (RAS) and Earthen Pond System

“…Such an improvement could encourage farmers to increase production, especially given the high demand for this species. Silurus glanis is valued not only for its taste but also for its nutritional qualities, including a favorable fatty acid profile and better sanogenic indices [ 59 ]. Compared to other commonly consumed freshwater fish species, catfish has a significant proportion of polyunsaturated fatty acids (PUFA) and superior sanogenic indices, which suggests that it is of better quality [ 59 ].…”

“…Silurus glanis is valued not only for its taste but also for its nutritional qualities, including a favorable fatty acid profile and better sanogenic indices [ 59 ]. Compared to other commonly consumed freshwater fish species, catfish has a significant proportion of polyunsaturated fatty acids (PUFA) and superior sanogenic indices, which suggests that it is of better quality [ 59 ]. Based on the results of our study, we recommend the adoption of RAS technology in European catfish aquaculture.…”

Comparative Assessment of the Nutritional and Sanogenic Features of Certain Cheese Sorts Originating in Conventional Dairy Farms and in “Mountainous” Quality System Farms

“…In order to better depict the sanogenity of the compared products, based on the fatty acids analysis, certain nutritional-sanogenic indices were calculated using the equations compiled from the literature by Simeanu et al [41]: polyinsaturation index (PI)-Equation (3); atherogenic index (AI) (Equation ( 4)); thrombogenic index (TI) (Equation ( 5)); and hypocholesterolic/hypercholesterolic ratio (h/H) (Equation ( 6)):…”

The Physiological Effects of Some Stress Indicators in Rainbow Trout Raised in Different Systems

“…For example, a supplement of 5 mg/kg nanoselenium introduced into the food of rainbow trout subjected to heat stress (+24⁰C) significantly increased the activity of liver glutathione peroxidase. Thus, the levels of alanine aminotransferase, aspartate aminotransferase, superoxide dismutase and malondialdehyde were reduced and, on the other hand, lipid accumulations in the liver decreased and its tissue structure improved [6,7].…”