Seasonal changes in fat and fatty acid profiles of the Sakarya Chub (Squalius pursakensis) from the Melen river basin

Abstract

In this study, total lipids and fatty acid composition of Squalius pursakensis fillet samples which were obtained from Melen River Basin during winter, spring and summer seasons were evaluated. Total lipid levels were 1.80% in winter, 2.56% in spring and 5.17% in summer. The composition of fatty acids showed that total polyunsaturated fatty acids (32.05-38.90%) were highest, followed by monounsaturated (29.85-35.40%) and saturated (27.10-31.23%). The fatty acid composition of polyunsaturated fatty acids (PUFAs) in fillets of S. pursakensis shows a high content n3 fatty acids eicosapentaenoic acid (EPA C20:5n3) and docosahexaenoic acid (DHA C22:6n3) with maximum rates of 6.70% and 16.33%, respectively (p<0.05). The saturated fatty acid (SFA) content was dominated by palmitic acid with the maximum ratio of 19.03%.

Düzce Melen Havzası (Türkiye) Barbus tauricus (Kessler, 1877) Populasyonu’nun Yağ ve Yağ asidi Profilinin Mevsimsel Değişimi

“…In the study, it is found that B. tauricus's dominant SFAs are palmitic acid (C16:0), Myristic acid (C164:0) and stearic acid (C18:0) (Figure 2); dominant MUFAs are Transoleic acid (C18:1n9t), Palmitoleic acid (C16:1), Erucic acid (C22:1n9), Oleic acid (C18:1n9c), Gadoleic acid (C20:1n9); dominant PUFAs Docosahexaenoic acid (C22:6n3), Linoleic acid (C18:2n6c), Eicosapentaenoic acid (C20:5n3), Alfa linolenic acid (C18:3n3) (Table 2). In studies by Ozogul et al [35], Mahmoud et al [36], Hisar and Hisar [37] on Cyprinus carpio, by Inan et al [24] on S. pursakensis and by Ates [28] on Squalius pursakensis and Capoeta, dominant SFAs were determined as myristic, palmitic and stearic acid, similar to our study. In studies by Gokce et al [38] Solea solea has palmitic (19.00%) and stearic acid (6,91%) rates at most in summer, while in our study, palmitic (17.64%) and stearic acid (6.93%) rates were found at most in spring.…”

“…The reason B. tauricus's total lipid amounts are low in winter is thought to be due to an increase in lipid usage by fishes needing more energy during the winter season. For poikilotherm creatures, the temperature is the most crucial factor affecting fish-feeding activity [24]. Similar results (in winter, 1.19%) were found in a study on the species Dicentrarchus labrax by Belikusakli [25].…”

“…SFA/PUFA ratio (0.93-1.21) determined in this study is higher than the one obtained in studies by Inan et al [24] (0.80-0.93) and Ates [28] Fish oil is essential for human health [45]. Fish oils have roles in treating many diseases causing death, primarily cardiovascular diseases.…”

“…Furthermore, the lipid amount of the Squalius pursakensis from the Melen Basin was found to be low in the winter season by Inan et al [24]. In this study, B. tauricus was evaluated as a lower-fat fish based on both Lambertsen [26] pursakensis by Ates [28] from the upper Sakarya River and Inan et al [24] from the Melen River Basin.…”