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Effect of formulated diets on the proximate composition and fatty acid profiles of sea urchin Paracentrotus lividus gonad

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Abstract

Three formulated diets were tested to evaluate their effects on gonad quality in Paracentrotus lividus. Experiments were conducted in parallel by the Consiglio Nazionale delle Ricerche (CNR) of Taranto (trial 1) and the University of Genoa (trial 2), in land-based systems. In both trials, somatic and gonadsomatic index (GSI) were measured and the nutritional profile of the sea urchins has determined significant variations in the biochemical composition. Sea urchins fed the experimental diets contained higher levels of nutrients (protein and lipid and carbohydrate) compared to wild sea urchins. However, total polyunsaturated fatty acids (PUFAs), especially EPA and DHA, and the n-3/n-6 ratio were lower in urchins fed with formulated diets. In both trials, sea urchins fed with diet 2 (SABS) showed a similar profile with PUFAs higher than SAFAs and MUFAs, the highest UNS/SAT ratio, although the highest n3/n6 ratio was observed in the group fed diet 3 (CNR). Atherogenicity, thrombogenicity, and hypocholesterolemic/hypercholesterolemic indices showed the best values in sea urchins fed diet 2 in both trials.

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Abbreviations

TL:

Total lipid

FAME:

Fatty acid methyl ester

GC:

Gas chromatography

FAs:

Fatty acids

NQI:

Nutritional quality indexes

AI:

Atherogenicity index

TI:

Thrombogenicity index

HH:

Hypocholesterolemic/hypercholesterolemic

PUFA:

Polyunsaturated fatty acids

MUFA:

Monounsaturated fatty acid

SAFA:

Saturated fatty acid

EPA:

Eicosapentaenoic acid—C20:5n3

DHA:

Docosahexaenoic acid—C22:6n3

LDLC:

Low-density lipoprotein cholesterol

HDLC:

High-density lipoprotein cholesterol

SDA:

Stearidonic acid

ARA:

Arachidonic acid

DPA:

Docosaepentaenoic acid

AA:

Arachidonic acid

UNS/SAT:

Unsaturated/saturated

CHD:

Coronary heart disease

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Funding

This research has been supported by ResUrch project: “REsearch and technological development to improve economic profitability and environmental Sustainability of sea URCHin farming” (http://resurchproject.com) funded by the EU under the FP7 framework.

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Correspondence to Ermelinda Prato.

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Prato, E., Chiantore, M., Kelly, M.S. et al. Effect of formulated diets on the proximate composition and fatty acid profiles of sea urchin Paracentrotus lividus gonad. Aquacult Int 26, 185–202 (2018). https://doi.org/10.1007/s10499-017-0203-5

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  • DOI: https://doi.org/10.1007/s10499-017-0203-5

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