Unit:
Κατεύθυνση Βιολογική ΩκεανογραφίαLibrary of the School of Science
Supervisors info:
Περσεφόνη Μεγαλοφώνου, Καθηγήτρια, Τμήμα Βιολογίας, ΕΚΠΑ
Morgane Henry, Ερευνήτρια Γ, Ινστιτούτο Θαλάσσιας Βιολογίας, Βιοτεχνολογίας και Υδατοκαλλιεργειών, ΕΛΚΕΘΕ
Original Title:
Επίδραση της χορήγησης μίγματος ιχνοστοιχείων οργανικής ή ανόργανης προέλευσης στην αύξηση και την ανοσολογική απόκριση νεαρών ατόμων λαβρακίου (Dicentrarchus labrax)
Translated title:
Effect of the inclusion of organic or inorganic minerals premix on growth and immunological response of juvenile sea bass (Dicentrarchus labrax)
Summary:
A 13-week feeding trial was conducted to assess the growth performance as well as the systemic and mucosal immunity of juvenile sea bass (Dicentrarchus labrax) fed plant based diets supplemented with trace mineral premix (Cu, Fe, Se, Mn, Zn) from organic (chelated) or inorganic sources. Six experimental diets were formulated that contained 0% of added minerals (control negative diets CTRL-), 100% of the concentration that was established for sea bass by the European research project “ARRAINA” either with inorganic (INORG) or organic (ORG) minerals, 65% (ORGlow) and 150% (ORGhigh) of the previous dose in organic minerals and a fish-meal based control positive diet (CTRL+). Concerning growth, fish fed the ORG diet showed elevated specific growth rate (SGR). Systemic immunity was significantly enhanced by the medium dose of organic minerals, based on total serum protein and nitric oxide that were increased in the ORG diet. On the other hand, serum total antibacterial activity was improved by the lower dose of organic minerals. Skin mucosal immunity was improved by the addition of medium dose of organic minerals (total protein and nitric oxide concentration), inorganic minerals (lysozyme activity) or both of them (alkaline phosphatase activity), whereas total antibacterial activity was highest in fish fed the ORGlow diet, as in the case with serum. Finally, intestinal mucosal immunity was strengthened in the ORGlow diet, in contrast with what was found in the systemic and skin mucosal immune response. Overall, without supplementation of diets with a mineral premix, growth and the majority of immune parameters were not improved. The present study suggests that organic trace minerals act better as supplements in plant-based diets of sea bass, but the level at which they should be used is not totally clear.
Main subject category:
Science
Keywords:
Sea bass, plant-based, inorganic, organic, minerals, premix, growth, immunology, systemic, mucosal immunity
Number of references:
336
