Up-scaling validation of a dummy regression approach for predictive modelling the fillet fatty acid composition of cultured European sea bass (Dicentrarchus labrax)

Abstract

The aim of the study was to validate a dummy regression approach for predictive modelling the fillet fatty acid (FA) composition of cultured European sea bass with dietary FA composition and lipid fillet content as independent variables. The model used our own data on gilthead sea bream as reference subgroup dataset and data from turbot, sole and European sea bass as dummy variables. Most of the observed variance within and among species was explained by the regression model without statistical significant interactions on blocks between diet composition and fish species subgroups. For the validation of European sea bass FA descriptors, predictive values derived from data on fish reared at laboratory scale were plotted against those obtained in farmed fish harvested at commercial size. A close linear association near to equality was found for 12 representative FAs, including saturated FAs, monoenenes and polyunsaturated FAs. This finding reinforces the possibility to produce tailored and healthy seafood products according to the guidelines of essential FA requirements in humans. FA algorithms for all the species in the model are hosted at www.nutrigroup-iats.org/ aquafat as a multispecies tool to interrogate the nutritionally regulated FA composition of four cultured marine fish species of a high added value.

Comprehensive biometric, biochemical and histopathological assessment of nutrient deficiencies in gilthead sea bream fed semi-purified diets

“…Comprehensive approaches have been used to address the total or partial FM/FO replacement in a wide range of finfish including rainbow trout (21) and typically marine fish such as European sea bass (22) and gilthead sea bream. In particular, for gilthead sea bream, the long-term consequences of feeding low FM/FO feeds on growth performance and endocrine status (7,23,24) , health and welfare (17,(25)(26)(27)(28)(29)(30) , fish quality (13,31,32) and food safety (33,34) have been considered in a highly integrated manner. However, knowledge on the specific effects and consequences of a given nutrient or a group of nutrients is mostly lacking.…”

The Use of Defatted Tenebrio molitor Larvae Meal as a Main Protein Source Is Supported in European Sea Bass (Dicentrarchus labrax) by Data on Growth Performance, Lipid Metabolism, and Flesh Quality

“…This assumption is supported by data on muscle lipid content, and circulating lipid levels that were positively correlated with HSI and VSI. This is not surprising since European sea bass is a fish with low to moderate lipid deposition rates in the fillet (Ballester-Lozano et al, 2016). Although lipid content of liver has not been assessed, the strong and positive correlation between circulating triglycerides and HSI, and the moderate and positive correlation between final whole-body lipids content, lipid gain and HSI may indicate liver steatosis which is a sign of deficiencies in minerals and n-3 LC-PUFA (Ballester-Lozano et al, 2015).…”

Comprehensive overview of feed‐to‐fillet transfer of new and traditional contaminants in Atlantic salmon and gilthead sea bream fed plant‐based diets

“…Indeed, juvenile fish of gilthead sea bream are able to grow fast and efficiently from early life stages until market size with practical diets containing <10% marine feed ingredients (Benedito‐Palos et al., ). However, carnivorous fish fed with little or no fish meal/fish oil diets have been shown to have a wide range of metabolic effects that, in addition to affecting growth performance, can also impact on health (Martin & Król, ; Torrecillas et al., ) or the nutritious value of seafood products as the most important source of omega‐3 in the human diet (Ballester‐Lozano, Benedito‐Palos, Mingarro, Navarro, & Pérez‐Sánchez, ; Ballester‐Lozano et al., ; Benedito‐Palos et al., ). The precise mechanisms for this disruption of fish health and welfare are not fully understood, although recent studies with extreme diet formulations pointed out in gilthead sea bream that dietary supplementation of plant‐based diets with sodium butyrate helps to prevent in long‐term feeding trials the inflammation of the intestinal epithelium, preserves the integrity of the intestinal barrier (Estensoro et al., ) and improves bacteria and parasite disease outcomes (Piazzon et al., , ).…”