Fatty acid profiles in different fish species in Lake Baikal

Grahl‐Nielsen, Otto; Averina, Elena; Pronin, N. M.; Раднаева, Л. Д.; Käkelä, Reijo

doi:10.3354/ab00355

Cited by 16 publications

(14 citation statements)

References 44 publications

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“…The ratios of omega -3 to omega -6 PUFA (1.59 -2.27) from Nile tilapia were within the recommended range of 1 -3 for fresh water fish whereas for marine fish the ratio is 8 -18 [34]. Osman et al [33] reported a ratio of 2.03 for the standard menhaden oil where he also suggested that it is a better index in comparing relative nutritional value of fish oils of different species.…”

Section: Discussionmentioning

confidence: 76%

“…A high ratio of PUFA to SFA indicates a good supply of PUFA relative to saturated fatty acids. Studies have shown that fish lipids with PUFA to SFA ratio above 0.5 have numerous health benefits which are attributed mainly to DHA and EPA [34]. Based on the high ratios of omega-3 to omega -6, Nile tilapia can be classified as a very good source of omega -3 PUFA and therefore there is no need to concentrate the PUFA before human consumption.…”

Section: Discussionmentioning

confidence: 99%

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Effects of Heavy Metal Pollution on Omega-3 Polyunsaturated Fatty Acids Levels In Tilapia Fish from Winam Gulf of Lake Victoria

Muinde¹,

Ogoyi²,

Shiundu

2013

TOENVIEJ

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Winam Gulf is facing major pollution threats from anthropogenic input of pollutants such as heavy metals and agrochemical residues. This has deleterious effects on flora and fauna in the lake and consequently the quality of omega -3 polyunsaturated fatty acids (PUFAs) which have numerous health benefits in humans. In addition, heavy metal bioaccumulation in fish poses a threat to human health. The major objective of the study was to establish whether there is a correlation between the heavy metal pollutants and the levels of omega -3 PUFAs in fish. Levels of heavy metals -lead, cadmium, Zinc and chromium in sediments, water, and tilapia from selected sites in Winam Gulf were investigated. They were analyzed using Atomic Absorption Spectrophotometer. Fish muscles were further analyzed for omega -3 PUFAs using gas chromatography. Sediment samples accumulated the highest levels of heavy metals ranging from below detection limit to as high as 277 mg/kg on dry weight basis. Zinc levels in fish muscles were the highest whereas cadmium was the lowest. Heavy metal levels in water were found to be lowest compared to sediments and fish. Omega-3 PUFAs, particularly alpha-linolenic, eicosapentaenoic, docosapentaenoic and docosahexaenoic acids were in substantial amounts in fish. Oil contents were in the range of (2.47-3.87) %. There was no clear link observed between the levels of heavy metals and omega-3 PUFAs in fish although the fish muscles showed presence of these metals.

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Effects of Heavy Metal Pollution on Omega-3 Polyunsaturated Fatty Acids Levels In Tilapia Fish from Winam Gulf of Lake Victoria

Muinde¹,

Ogoyi²,

Shiundu

2013

TOENVIEJ

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“…The fatty acid composition of freshwater fish has been extensively studied, from the earlier studies of Gruger [5], Kinsella [6] and Ackman [7] to more recent articles [8][9][10][11]. It is well established that freshwater fish contain lower amounts of C20, C22 and n-3 fatty acids and higher amounts of C18 and n-6 fatty acids, in particular 18:2n-6, than their wild marine counterparts [4,6].…”

Section: Introductionmentioning

confidence: 99%

Fatty Acid Composition of Freshwater Wild Fish in Subalpine Lakes: A Comparative Study

Vasconi

Caprino

Bellagamba

et al. 2014

Lipids

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In this study, the proximate and fatty acid compositions of the muscle tissue of 186 samples of fish belonging to fifteen species of freshwater fish harvested in subalpine lakes (bleak, shad, crucian carp, whitefish, common carp, pike, black bullhead, burbot, perch, Italian roach, roach, rudd, wels catfish, chub and tench) were investigated. Most of the fish demonstrated a lipid content in the fillet lower than 2.0 g 100 g(-1) wet weight (range 0.6-9.7). A strong relationship between feeding behavior and fatty acid composition of the muscle lipids was observed. Planktivorous fish showed the lowest amounts of n-3 fatty acids (p < 0.05), but the highest monounsaturated fatty acid (MUFA) contents, in particular 18:1n-9. Conversely, carnivorous fish showed the highest amounts of saturated fatty acids and n-3 fatty acids (p < 0.05), but the lowest MUFA contents. Omnivorous fish showed substantial proportions of n-3 fatty acids and the highest contents of n-6 fatty acids. Principal component analysis showed a distinct separation between fish species according to their feeding habits and demonstrated that the most contributing trophic markers were 18:1n-9, 18:3n-3, 22:6n-3 and 20:4n-6. The quantitative amounts n-3 polyunsaturated fatty acid in muscle tissues varied depending on the fish species, the lipid content and the feeding habits. Some species were very lean, and therefore would be poor choices for human consumption to meet dietary n-3 fatty acid requirements. Nevertheless, the more frequently consumed and appreciated fish, shad and whitefish, had EPA and DHA contents in the range 900-1,000 mg 100 g(-1) fresh fillet.

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“…snails and profundal chironomid larvae. Although the sample sizes here were small, they are comparable to those of other studies using FA analysis [25,27,28], and were a necessity given the extensive analytical procedures involved with extraction and identification of FA from animal tissues, and our desire to incorporate data from a number of lakes in order to asses the generality of any patterns we ultimately observed. To increase statistical power, data from all lakes were combined for subsequent analyses, under the assumption that each taxon exploited similar niches in all systems, a phenomenon identified consistently in earlier studies of these lakes [7,37,40].…”

Section: Methodsmentioning

confidence: 57%

Resource polymorphism in European whitefish: Analysis of fatty acid profiles provides more detailed evidence than traditional methods alone

et al. 2019

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Resource polymorphism—whereby ancestral generalist populations give rise to several specialised morphs along a resource gradient—is common where species colonise newly formed ecosystems. This phenomenon is particularly well documented in freshwater fish populations inhabiting postglacial lakes formed at the end of the last ice age. However, knowledge on how such differential exploitation of resources across contrasting habitats might be reflected in the biochemical compositions of diverging populations is still limited, though such patterns might be expected. Here, we aimed to assess how fatty acids (FA)—an important biochemical component of animal tissues—diverged across a polymorphic complex of European whitefish ( Coregonus lavaretus ) and their closely related monomorphic specialist congener vendace ( Coregonus albula) inhabiting a series of six subarctic lakes in northern Fennoscandia. We also explored patterns of FA composition in whitefish’s predators and invertebrate prey to assess how divergence in trophic ecology between whitefish morphs would relate to biochemical profiles of their key food web associates. Lastly, we assessed how information on trophic divergence provided by differential FA composition compared to evidence of resource polymorphism retrieved from more classical stomach content and stable isotopic (δ 13 C, δ 15 N) information. Examination of stomach contents provided high-resolution information on recently consumed prey, whereas stable isotopes indicated broad-scale patterns of benthic-pelagic resource use differentiation at different trophic levels. Linear discriminant analysis based on FA composition was substantially more successful in identifying whitefish morphs and their congener vendace as distinct groupings when compared to the other two methods. Three major FA (myristic acid, stearic acid, and eicosadienoic acid) proved particularly informative, both in delineating coregonid groups, and identifying patterns of pelagic-benthic feeding throughout the wider food web. Myristic acid (14:0) content and δ 13 C ratios in muscle tissue were positively correlated across fish taxa, and together provided the clearest segregation of fishes exploiting contrasting pelagic and benthic niches. In general, our findings highlight the potential of FA analysis for identifying resource polymorphism in animal populations where this phenomenon occurs, and suggest that this technique may provide greater resolution than more traditional methods typically used for this purpose.

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Fatty acid profiles in different fish species in Lake Baikal

Cited by 16 publications

References 44 publications

Effects of Heavy Metal Pollution on Omega-3 Polyunsaturated Fatty Acids Levels In Tilapia Fish from Winam Gulf of Lake Victoria

Effects of Heavy Metal Pollution on Omega-3 Polyunsaturated Fatty Acids Levels In Tilapia Fish from Winam Gulf of Lake Victoria

Fatty Acid Composition of Freshwater Wild Fish in Subalpine Lakes: A Comparative Study

Resource polymorphism in European whitefish: Analysis of fatty acid profiles provides more detailed evidence than traditional methods alone

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