2026-04-17T11:40:56Zhttps://recercat.cat/oai/requestoai:recercat.cat:20.500.12327/6242025-10-22T11:26:38Zcom_2072_4428com_2072_4427col_2072_487898
RECERCAT
author
Parma, Luca
author
Pelusio, Nicole Francesca
author
Gisbert, Enric
author
Esteban, Maria Angeles
author
D'Amico, Federica
author
Soverini, Matteo
author
Candela, Marco
author
Dondi, Francesco
author
Gatta, Pier Paolo
author
Bonaldo, Alessio
other
Producció Animal
group
Aqüicultura
2025-10-22T11:26:38Z
2025-10-22T11:26:38Z
2019-12-13
Parma, Luca, Nicole Francesca Pelusio, Enric Gisbert, Maria Angeles Esteban, Federica D'Amico, Matteo Soverini, Marco Candela, Francesco Dondi, Pier Paolo Gatta, and Alessio Bonaldo. 2020. "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". Aquaculture 518: 734854. Elsevier BV. doi:10.1016/j.aquaculture.2019.734854.
0044-8486
http://hdl.handle.net/20.500.12327/624
https://doi.org/10.1016/j.aquaculture.2019.734854
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.
eng
Attribution-NonCommercial-NoDerivatives 4.0 International
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
info:eu-repo/semantics/article