Effects of rearing density on growth, digestive conditions, welfare indicators and gut bacterial community of gilthead sea bream (Sparus aurata, L. 1758) fed different fishmeal and fish oil dietary levels
| Autor: | María Ángeles Esteban, Luca Parma, Alessio Bonaldo, Francesco Dondi, Pier Paolo Gatta, Enric Gisbert, Nicole Francesca Pelusio, Federica D’Amico, Marco Candela, Matteo Soverini |
|---|---|
| Přispěvatelé: | Luca Parma, Nicole Francesca Pelusio, Enric Gisbert, Maria Angeles Esteban, Federica D'Amico, Matteo Soverini, Marco Candela, Francesco Dondi, Pier Paolo Gatta, Alessio Bonaldo, Producció Animal, Aqüicultura |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Aquatic Science
Gut flora Quantitative Biology - Quantitative Methods Feed conversion ratio 03 medical and health sciences chemistry.chemical_compound Animal science Fish meal Stocking Aquaculture 14. Life underwater Gilthead sea bream rearing density fishmeal and fish oil replacement digestive enzyme humoral immunity on skin mucus gut bacterial community Quantitative Methods (q-bio.QM) 030304 developmental biology 2. Zero hunger 0303 health sciences biology business.industry 04 agricultural and veterinary sciences biology.organism_classification Fish oil chemistry FOS: Biological sciences Digestive enzyme 040102 fisheries biology.protein 0401 agriculture forestry and fisheries Lysozyme business |
| Zdroj: | IRTA Pubpro. Open Digital Archive Institut de Recerca i Tecnologia Agroalimentàries (IRTA) Aquaculture |
| Popis: | In Mediterranean aquaculture, significant advances have been made towards a reduction of marine-derived ingredients in aquafeed formulation, as well as in defining the effect on how environmental factors such as rearing density interact with fish health. Little research, however, has examined the interaction between rearing density and dietary composition on main key performance indicators, physiological processes and gut bacterial community. A study was undertaken, therefore to assess growth response, digestive enzyme activity, humoral immunity on skin mucus, plasma biochemistry and gut microbiota of gilthead sea bream (Sparus aurata, L. 1758) reared at high (HD, 36–44 kg m−3) and low (LD, 12–15 kg m−3) final stocking densities and fed high (FM30/FO15, 30% fishmeal FM, 15% fish oil, FO) and low (FM10/FO3; 10% FM and 3% FO) FM and FO levels. Isonitrogenous and isolipidic extruded diets were fed to triplicate fish groups (initial weight: 96.2 g) to overfeeding over 98 days. The densities tested had no major effects on overall growth and feed efficiency of sea bream reared at high or low FM and FO dietary level. However, HD seems to reduce feed intake compared to LD mainly in fish fed FM30/FO15. Results of digestive enzyme activity indicated a comparable digestive efficiency among rearing densities and within each dietary treatment even if intestinal brush border enzymes appeared to be more influenced by stocking density compared to gastric and pancreatic enzymes. Plasma parameters related to nutritional and physiological conditions were not affected by rearing densities under both nutritional conditions a similar observation was also achieved through the study of lysozyme, protease, antiprotease and total protein determination in skin mucus, however; in this case lysozyme was slightly reduced at HD. For the first time on this species, the effect of rearing density on gut bacterial community was studied. Different response in relation to dietary treatment under HD and LD were detected. Low FM-FO diet maintained steady the biodiversity of the gut bacterial community between LD and HD conditions while fish fed high FM-FO level showed a reduced biodiversity at HD. According to the results, it seems feasible to rear gilthead sea bream at the on-growing phase at a density up to 36–44 kg m−3 with low or high FM-FO diet without negatively affecting growth, feed efficiency, welfare condition and gut bacterial community. info:eu-repo/semantics/acceptedVersion |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|