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Evaluation of the Effects of the Enriched-Organic Diets Composition on European Sea Bass Welfare through a Multi-Parametric Approach
- Publication Year :
- 2020
-
Abstract
- Three groups of European sea bass (Dicentrarchus labrax) were fed for seven months, with either a conventional diet or two different organic diets, which contain organic vegetables and a natural antioxidant compound. The two organic diets differed themselves in terms of raw proteins, fish oil, and lipid contents. Sea bass welfare condition was assessed in relation to these three diets, using 16 different indicators. These were: swimming activity (recovery test, muscle activity), haematological and serological stress indicators (haematocrit, haemoglobin, red-blood-cell count, cortisol, glucose, lactate), aspecific immunity parameter (lysozyme), indicators of exposure to organic contaminants (7-ethoxyresorufin-O-deethylase and glutathione-S-transferase), and growth parameters (weight gain, specific growth rate, feed conversion ratio, protein efficiency ratio, and hepato-somatic index). Most of these parameters individually did not give consistent responses, but their integration can provide an accurate evaluation of the fish welfare conditions among the three diet experimental groups. The multiparametric approach outlined a comprehensive picture of sea bass physiological state. The principal component analysis and the multi-criteria-decision-analysis were found to be useful tools for an integrated fish welfare assessment, highlighting that the best welfare condition was achieved in the experimental group fed with the protein-rich organic diet.
- Subjects :
- Protein efficiency ratio
media_common.quotation_subject
organic
Ocean Engineering
Biology
Feed conversion ratio
European sea ba
03 medical and health sciences
Animal science
multiparametric approach
medicine
Sea bass
030304 developmental biology
Water Science and Technology
Civil and Structural Engineering
media_common
0303 health sciences
muscle activity
04 agricultural and veterinary sciences
Fish oil
biology.organism_classification
welfare
040102 fisheries
0401 agriculture, forestry, and fisheries
Dicentrarchus
Composition (visual arts)
medicine.symptom
Welfare
Weight gain
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....9345414ef2a8b1a9f86bf88b19af6d3a