Fatty Acid Composition and Contents of Seven Commercial Fish Species of Genus Coregonus from Russian Subarctic Water Bodies

Abstract

In several Russian northern lakes and rivers, Arctic cisco Coregonus autumnalis, least cisco C. sardinella, peled C. peled, tugun C. tugun, broad whitefish C. nasus, whitefish C. lavaretus and vendace C. albula were sampled in periods of officially permitted commercial fishery. Special attention was paid to contents (mg g of wet weight) of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in muscle tissues (filets), which are essential for human nutrition. The highest values of EPA + DHA content in semi-anadromous fish and freshwater fish were recorded for C. autumnalis from the Yenisei River, 17.60 mg g wet weight, and for C. lavaretus from the Sobachye Lake, 16.61 mg g wet weight, respectively. Intra-genus variations of EPA + DHA contents of Coregonus species were from 1.87 to 17.60 mg g wet weight. Since the congeneric species were genetically close to each other, the variations in EPA and DHA contents were thought to be caused primarily by ecological factors: migrational capability, type of feeding and trophic status of aquatic ecosystems. In general, the majority of studied species appeared to be of a high nutritive value for humans, although unfavorable environmental conditions could considerably diminish this value.

Comparison of Fatty Acid Contents in Major Lipid Classes of Seven Salmonid Species from Siberian Arctic Lakes

“…In TAG of charr the percentage of 22:4n-3 accounted for 1.3% of FA sum, being absent or found in traces in other studied fish. The presence of this PUFA was previously reported for least cisco Coregonus sardinella, small-sized pelagic fish inhabited Sobachye Lake [23]. The studied charr from Sobachye Lake was piscivorous (Table 1), thus, it could obtain this PUFA from the consumed least cisco.…”

“…The catches were from two oligotrophic arctic lakes, Sobachye and Pyasino. Sobachye Lake was previously characterized elsewhere [23]. Briefly, it is located at 69 • 01 N 91 • 05 E and has maximum depth of 162 m and area equal to 99 km 2 .…”

“…Analyses of all FAMEs were done with a gas chromatograph equipped with a mass spectrometer detector (model 6890/5975C; Agilent Technologies, Santa Clara, CA, USA) and with a 30-m long, 0.25-mm internal diameter capillary HP-FFAP column. Detailed descriptions of the chromatographic and mass-spectrometric conditions are given in [23].…”

Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake

“…Fish white muscle is usually characterised by large absolute and relative content of EPA, DHA, and ARA (Gladyshev et al., ; Łuczyńska, Borejszo, & Łuczyński, ; Muir et al., ; Strandberg et al., ). Adipose salmonid fish, such as Arctic charr ( Salvelinus alpinus (L.)), have large lipid reserves in muscle and carcass (including skin), whereas in many lean species, such as cod ( Gadus morhua L.), the liver is the most important lipid storage tissue (Jobling, Leknes, Sæther, & Bendiksen, ; Jobling et al., ).…”

“…Fish white muscle is usually characterised by large absolute and relative content of EPA, DHA, and ARA (Gladyshev et al, 2017;Łuczyńska, Borejszo, & Łuczyński, 2008;Muir et al, 2014;Strandberg et al, 2018).…”