Bacterial pigment for Nile tilapia feeding

The aim of this study was to evaluate the effects of different carotenoids sources in tilapia fish diets on the animals’ performance and fillets characteristics. Nine hundred and sixty tilapias, Oreochromis niloticus , averaging 15 g were distributed into 24 tanks to receive one of the six treatment...

Full description

Saved in:
Bibliographic Details
Published in:Aquaculture international 2016-04, Vol.24 (2), p.647-660
Main Authors: Grassi, Thiago Luís Magnani, do Espírito Santo, Edson Francisco, de Siqueira Marcos, Marcelo Tacconi, Cavazzana, Jefferson Felipe, Oliveira, Dayse Lícia, Bossolani, Iderlipes Luiz Carvalho, Ponsano, Elisa Helena Giglio
Format: Article
Language:English
Subjects:
Animals
Aquaculture
Bacteria
Biomass
Biomedical and Life Sciences
Brackish
Carotenoids
Diet
Fatty acids
Food
Freshwater & Marine Ecology
Life Sciences
Lipids
Oreochromis niloticus
Pigments
Proteins
Rubrivivax gelatinosus
Zoology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The aim of this study was to evaluate the effects of different carotenoids sources in tilapia fish diets on the animals’ performance and fillets characteristics. Nine hundred and sixty tilapias, Oreochromis niloticus , averaging 15 g were distributed into 24 tanks to receive one of the six treatments (four repetitions) for 80 days: basal diet with no pigment (control group), basal diet with 350 mg/kg astaxanthin 10 % and basal diets added of four different concentrations of Rubrivivax gelatinosus biomass (175, 350, 700 and 1400 mg/kg). Variables analyzed included feed consumption, weight gain, feed conversion and specific growth rate for the animals and pH, proximate composition, carotenoids, polyunsaturated fatty acids and color for the fillets. Productive parameters did not differ statistically. Moisture content was lower on the fillets of treatments with pigments. The protein contents on the fillets of diets supplemented with the bacterial biomass were higher than in control group, while pH, minerals and lipids did not vary among treatments. Lightness and yellowness did not differ among the treatments, but redness and carotenoids contents were higher for all the groups that received the pigments than for the control group. The ratio of polyunsaturated fatty acids n-6/n-3 was improved with the dietary biomass. So, it was concluded that the use of the pigmenting ingredients did not alter productive parameters but increased redness and carotenoids contents in the fillets. Moreover, the use of R. gelatinosus biomass also increased the protein contents and improved the fatty acids profile in the fillets.
ISSN:0967-6120
1573-143X
DOI:10.1007/s10499-015-9955-y