Oxidative stability of tilapia feeds containing Saccharomyces cerevisiae and Spirulina platensis

Grassi, Thiago Luís Magnani; Sedlacek-Bassani, Juliana; Ponsano, Elisa Helena Giglio

doi:10.1590/0103-8478cr20190344

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ANIMAL PRODUCTION • Cienc. Rural 50 (1) • 2020 • https://doi.org/10.1590/0103-8478cr20190344 copy

Oxidative stability of tilapia feeds containing Saccharomyces cerevisiae and Spirulina platensis

Estabilidade oxidativa de rações de tilápia contendo Saccharomyces cerevisiae e Spirulina platensis

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT:

The aim of this study was to evaluate the effect of the inclusion of microbial biomass on the oxidative rancidity of tilapia rations stored for 12 months. Treatments included a control diet and diets supplemented with either 0.01% vitamin E, 0.25 and 0.5% of Saccharomyces cerevisiae and 0.25 and 0.5% of Spirulina platensis. Experimental diets were stored in the dark inside plastic bags at room temperature (25 °C) for 12 months. The oxidative rancidity was measured as thiobarbituric acid reactive substances (TBARS). It was concluded that the inclusions of Spirulina platensis at 0.25% (1.734 ± 0.206) and 0.5% (1.629 ± 0.181) and Saccharomyces cerevisiae at 0.5% (1.459 ± 0.305) minimized the oxidative rancidity in comparation to control diet (2.843 ± 0.109) of Nile tilapia until 12 months of storage.

Key words:
biomass; lipid oxidation; ratio; TBARS.

Authorship

Thiago Luís Magnani Grassi

Faculdade de Medicina Veterinária, Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), 16050680, Araçatuba, SP, Brasil. E-mail: thiago.grassi@unesp.br. *Corresponding author. Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)BrazilAraçatuba, SP, BrazilFaculdade de Medicina Veterinária, Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), 16050680, Araçatuba, SP, Brasil. E-mail: thiago.grassi@unesp.br. *Corresponding author.

http://orcid.org/0000-0003-4109-2522

Juliana Sedlacek-Bassani

Elisa Helena Giglio Ponsano

http://orcid.org/0000-0003-3132-0368

DECLARATION OF CONFLICT OF INTERESTS

The authors declare no conflict of interest. The founding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.

AUTHORS’ CONTRIBUTIONS

All authors contributed equally for the conception and writing of the manuscript. All authors critically revised the manuscript and approved of the final version.

SCIMAGO INSTITUTIONS RANKINGS

Figures | Tables

Figures (1)
Tables (2)

Thumbnail

Figure 1
Fitted broken-line plot of oxidative rancidity as a function of S. cerevisiae (A) and S. platensis (B) inclusion in the 12 months old diets.

Thumbnail

Table 1
Experimental diet for tilapias.

Thumbnail

Table 2
Oxidative rancidity of feed containing microbial biomass.

Figure 1 Fitted broken-line plot of oxidative rancidity as a function of S. cerevisiae (A) and S. platensis (B) inclusion in the 12 months old diets.

Table 1 Experimental diet for tilapias.

Ingredients (%)	CD	VE	SC25	SC50	SP25	SP50
Feather meal	2	2	2	2	2	2
Ground corn	33.06	33.05	33.06	33.06	33.06	33.06
Poultry meal by-products	6	6	6	6	6	6
Soybean meal	10.44	10.44	10.19	9.94	10.19	9.94
Wheat meal	15.88	15.88	15.88	15.88	15.88	15.88
Meat meal	17.14	17.14	17.14	17.14	17.14	17.14
Blood meal	12	12	12	12	12	12
NaCl	0.8	0.8	0.8	0.8	0.8	0.8
Chicken oil	2	2	2	2	2	2
Premix^a	0.6	0.6	0.6	0.6	0.6	0.6
Methionine	0.08	0.08	0.08	0.08	0.08	0.08
Vitamin E	0	0.01	0	0	0	0
S. cerevisiae	0	0	0.25	0.5	0	0
S. platensis	0	0	0	0	0.25	0.5
Total	100	100	100	100	100	100
--------------------------------------------------------------------Nutrients/Energy - calculated values-----------------------------------------------------
Digestible energy (kcal/kg)	3000	3000	3000	3000	3000	3000
Digestible protein (%)	27.63	27.63	27.63	27.63	27.63	27.63
Ether extract (%)	7.50	7.50	7.50	7.50	7.50	7.50
Crude fiber (%)	3.00	3.00	3.00	3.00	3.00	3.00
Mineral composition (%)	10.48	10.48	10.48	10.48	10.48	10.48
Total calcium (%)	2.74	2.74	2.74	2.74	2.74	2.74
Total phosphorus (%)	1.57	1.57	1.57	1.57	1.57	1.57
Starch (%)	27.03	27.03	27.03	27.03	27.03	27.03
Available phosphorus (%)	0.69	0.69	0.69	0.69	0.69	0.69
Arginine (%)	1.80	1.80	1.80	1.80	1.80	1.80
Lysine (%)	2.33	2.33	2.33	2.33	2.33	2.33
Threonine (%)	1.25	1.25	1.25	1.25	1.25	1.25
Tryptophan (%)	0.34	0.34	0.34	0.34	0.34	0.34
Methionine (%)	0.45	0.45	0.45	0.45	0.45	0.45
Vitamin C (mg/kg)	700	700	700	700	700	700
-------------------------------------------------------------------------Nutrients - analyzed values (%)------------------------------------------------------
Protein	32.29	32.18	32.26	32.22	32.41	32.34
Ether extract	8.11	8.15	8.14	8.11	8.18	8.09
Ash	9.79	9.84	9.68	9.82	9.69	9.84
Crude fiber	3.62	3.65	3.57	3.72	3.62	3.59
Moisture	10.75	10.63	10.65	10.85	10.93	10.86

CD - control diet, VE - CD + 0.01% vitamin E, SC25 - CD + 0.25% S. cerevisiae, SC50 - CD + 0.5% S. cerevisiae, SP25 - CD + 0.25% S. platensis and SP50 - CD + 0.5% S. platensis. ^a Composition per kg of product - Choline 83,333 mg, vitamin A 2,083 UI, vitamin D3 500 UI, vitamin E 37,500 mg, vitamin K3 2,500 mg, vitamin B1 4,167 mg, vitamin B2 4,167 mg, vitamin B6 3,333 mg, vitamin B12 7,500 g, niacin 12,500 mg, calcium pantothenate 8,152 mg, pantotenic acid 7,500 mg, folic acid 833 mg, biotin 125 mg, vitamin C 116,667 mg, inositol 12,500 mg, iron specific source 12,500 mg, Fe 12,500 mg, Cu 2,500 mg, Mn 7,500 mg, Zn 16,667 mg, Co 42 mg, I 125 mg, Se 67 mg.

Table 2 Oxidative rancidity of feed containing microbial biomass.

Treatment	TBARS^* (mg malonaldehyde kg^-1)
CD	2.483 ± 0.109^a
VE	1.941 ± 0.158^ab
SC25	1.900 ± 0.019^ab
SC50	1.459 ± 0.305^b
SP25	1.734 ± 0.206^b
SP50	1.629 ± 0.181^b
P	0.0155
CV (%)	19.6

^*Thiobarbituric acid reactive substances; CD - control diet, VE - CD + 0.01% vitamin E, SC25 - CD + 0.25% S. cerevisiae, SC50 - CD + 0.5% S. cerevisiae, SP25 - CD + 0.25% S. platensis and SP50 - CD + 0.5% S. platensis. CV - coefficient of variation; ^ab Means followed by different letters are significantly different (P<0.05).

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Oxidative stability of tilapia feeds containing Saccharomyces cerevisiae and Spirulina platensis

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[1] DECLARATION OF CONFLICT OF INTERESTS

The authors declare no conflict of interest. The founding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.