Diet estimation of Paralichthys orbignyanus in a coastal lagoon via quantitative fatty acid signature analysis

Magnone, Larisa; Bessonart, Martín; Rocamora, Martín; Gadea, Juan; Salhi, M.

doi:10.1016/j.jembe.2014.10.008

Cited by 22 publications

(28 citation statements)

References 63 publications

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“…Several studies have demonstrated that the accumulation and reduction of reserves stored in seafood, especially shellfish, mainly depend on environmental influences on the metabolic activity and the amount as well as the nutritional value of the food supply [38]. Regarding Table 1, a significant difference was observed between both sexes in total oil (males vs females: 11.6 vs 9.0%; p < 0.01), however, no significant variation was observed in neutral (male…”

Section: Oil Contentmentioning

confidence: 92%

First Investigation in the Biochemical Analysis of the Invasive Crab Portunus segnis from Tunisian Waters

Bejaoui

Ghribi

Hatira

et al. 2017

J Americ Oil Chem Soc

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The invasive Portunus segnis, an atlantic species, was recently recorded in Tunisian waters. Since its record in the Gulf of Gabes, no studies have been carried out about the biochemical analysis of this alien species. In this context, our study aims to evaluate the fatty acid profile, lipid classes (neutral and polar), and nutritional value of breast of this invasive species. Specimens sampled from the gulf of Gabes were found to be rich in protein and oil, with significant differences between sexes. The level of saturated, monounsaturated, and polyunsaturated fatty acids in neutral and polar showed a significant difference between sexes. Saturated fatty acids were significantly higher in male P. segnis compared to the female. Docosahexaenoic (DHA), eicosapentaenoic (EPA), and arachidonic (ARA) were the most predominate polyunsaturated fatty acids (PUFA) in all oil classes. Oleic (C18:1) and Palmitoleic (C16:1) were the most abundant in monounsaturated. Palmitic (C16:0) and Stearic (C18:0) were the major saturated fatty acids. Consequently, the breast of P. segnis was a valuable source of high oil quality: It is rich in essential fatty acids and has an important n‐3/n‐6 ratio in both male and female blue crab. Therefore, the atherogenicity and the thrombogenicity were also evaluated, showing that P. segnis is a shellfish of greater value for human consumption in Tunisia.

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Section: Oil Contentmentioning

confidence: 92%

First Investigation in the Biochemical Analysis of the Invasive Crab Portunus segnis from Tunisian Waters

Bejaoui

Ghribi

Hatira

et al. 2017

J Americ Oil Chem Soc

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“…Calibrations, derived from such feeding trials, have subsequently been employed to yield estimates of diet compositions of wildcaught predators (Nordstrom et al 2008;Tucker et al 2009). However, such attempts at diet composition estimation have sparsely been explored in fishes (but see: Budge et al 2012;Magnone et al 2015).…”

Section: R a F Tmentioning

confidence: 99%

Evaluating quantitative fatty acid signature analysis (QFASA) in fish using controlled feeding experiments

Happel

Stratton

Kolb

et al. 2016

Can. J. Fish. Aquat. Sci.

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Accurate diet estimation has long been a challenging issue for researchers investigating predators because of constraints associated with stomach content analyses. Fatty acid signature analysis offers an alternative avenue to study long-term diet trends in consumers. Despite the wealth of experiments involving fatty acids of fish and their diets, few have evaluated quantitative fatty acid signature analysis (QFASA) with fish consumers. To this end, we fed juvenile lake trout (Salvelinus namaycush), round goby (Neogobius melanostomus), and yellow perch (Perca flavescens) various invertebrate species and back-classified each predator to its respective prey using only fatty acids. Estimates were highly accurate when metabolism of diets was natively accounted for by using fatty acid profiles of predators fed known diets as the “prey library”. While highly accurate results were obtained, accounting for each predator–prey relationship limits the use of QFASA to predators that consume a limited number of species. We call for specific knowledge as to how fatty acid profiles reflect each predator–prey interaction before attempting to use fatty acids to quantify a consumer’s diet. Only after incorporating such data will QFASA provide an accurate view of individual’s diets when stomach content data are not available or are invalid.

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“…After feeding a known diet, saturation is reached and CCs are calculated for each individual FA to determine the extent of FA metabolism or deposition into tissues (Iverson, et al , ). While QFASA has been applied widely to marine mammals and birds (Bowen & Iverson, ; Rosen & Tollit, ; McKinney et al , ; Wang et al , ), very few studies have used this approach for fishes (Budge et al , ; Magnone et al , ). Fatty‐acid composition in fishes may differ depending on life stage, growth and tissue type.…”

Section: Introductionmentioning

confidence: 99%

“…Few other published studies calculate CCs of fish in controlled feeding studies [i.e. adult salmonids (Budge et al , ) and juvenile gadids (Copeman et al , ) in temperate regions and adult flatfish in a subtropical region (Magnone et al , )].…”

Section: Introductionmentioning

confidence: 99%

Fatty‐acid biomarkers and tissue‐specific turnover: validation from a controlled feeding study in juvenile Atlantic croaker Micropogonias undulatus

Mohan

Connelly

et al. 2016

Journal of Fish Biology

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Fatty-acid (FA) profiles of liver and muscle tissue from juvenile Atlantic croaker Micropogonias undulatus were examined over a 15 week diet-switch experiment to establish calibration coefficients (CC) and improve understanding of consumer-diet relationships for field applications. Essential FAs [docosahexaenoic acid (DHA), 22:6n-3 and eicosapentaenoic acid (EPA) , 20:5n-3] decreased and 18:2n-6 increased in tissues of M. undulatus fed diets with increasing proportions of terrestrial v. marine lipid sources. Non-linear models used to estimate the incorporation rate and days to saturation of per cent 18:2n-6 in tissues showed that livers incorporated 18:2n-6 faster than muscle, but the proportions of 18:2n-6 in muscle were higher. CCs were established to determine proportions of FA deposition in tissues relative to diet. Many CCs were consistent amongst diet treatments, despite growth and dietary differences. The CCs can be used to discern FA modification and retention within tissues and as tools for future quantitative estimates of diet histories. Incorporation rates and CCs of 18:2n-6 were applied to a sub-set of field samples of wild M. undulatus to understand habitat use and feeding ecology. Altogether, these results suggest that FAs provide a time-integrated measure of diet in aquatic food webs and are affected by tissue type, growth rate and the influence of mixed diets.

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Diet estimation of Paralichthys orbignyanus in a coastal lagoon via quantitative fatty acid signature analysis

Cited by 22 publications

References 63 publications

First Investigation in the Biochemical Analysis of the Invasive Crab Portunus segnis from Tunisian Waters

First Investigation in the Biochemical Analysis of the Invasive Crab Portunus segnis from Tunisian Waters

Evaluating quantitative fatty acid signature analysis (QFASA) in fish using controlled feeding experiments

Fatty‐acid biomarkers and tissue‐specific turnover: validation from a controlled feeding study in juvenile Atlantic croaker Micropogonias undulatus

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