Linseed fibers modulate the production of short-chain fatty acids and improve performance and plasma and skin mucus para
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Linseed fibers modulate the production of short-chain fatty acids and improve performance and plasma and skin mucus parameters of silver catfish (Rhamdia quelen) Taida Juliana Adorian & Patrícia Inês Mombach & Mariane Bittencourt Fagundes & Roger Wagner & Dirleise Pianesso & Yuri Bohnenberger Telles & Marina Osmari Dalcin & Leila Picolli da Silva
Received: 8 June 2020 / Accepted: 27 September 2020 # Springer Nature B.V. 2020
Abstract This study was conducted to evaluate the prebiotic action of distinct linseed fibers on diets for silver catfish (Rhamdia quelen) juvenile. For this, soluble and insoluble fractions of linseed fiber were concentrated separately and combined in four ratios (1:0.5, 1:1, 1:2, 1:4), which were added in diets and evaluated along with a control diet. After 45 days receiving the experimental diets, the animals were submitted to biometry for data collection and samples. The experimental design was completely randomized, data were submitted to analysis of variance, and the means were compared by Tukey’s test (P < 0.05). Fish performance was higher for the group that received the 1:2 and 1:4 diets. The production of intestinal acetic acid was higher in fish fed on the 1:2 diet, and butyric acid was higher with 1:4 diet and the T. J. Adorian (*) : P. I. Mombach : D. Pianesso : M. O. Dalcin : L. P. da Silva Department of Animal Science, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul. AV. Roraima n° 1000, Cidade Universitária, Bairro Camobi, Santa Maria, RS CEP: 97105-900, Brazil e-mail: [email protected] M. B. Fagundes : R. Wagner Department of Food and Science Technology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul. AV. Roraima n° 1000, Cidade Universitária, Bairro Camobi, Santa Maria, RS CEP: 97105-900, Brazil Y. B. Telles Laboratory of Systematics, Entomology and Biogeography, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul. AV. Roraima n° 1000, Cidade Universitária, Bairro Camobi, Santa Maria, RS CEP: 97105-900, Brazil
propionic acid with the control diet. The control diet led to lower counts of goblet cells. Total proteins and globulins in plasma, mucoprotein, total immunoglobulins, and cutaneous mucus pH were higher in fish fed on diets 1:2 and 1:4. Cortisol levels and intestinal pH were lower in these treatments. The linseed fiber intake increased total plasma immunoglobulins and plasma alkaline phosphatase activity and in mucus. It was concluded that the use of 1:2 and 1:4 soluble fiber/insoluble linseed in the diet beneficially modulates the production of short-chain fatty acids in the digesta, with reflection on growth performance, number of goblet cells in the intestinal epithelium, and improvement in plasma and skin mucus parameters of fish. Keywords SCFA . Silver catfish . Dietary fiber . Linum usitatissimum . Prebiotic Abbreviations BHT Butylhydroxytoluene DWG Daily weight gain IgT Total immunoglobulin SE Standard error SCFA Short-chain fatty acids S:IF Soluble/insoluble fiber UFSM Federal University of Santa Maria
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