Effects of Dietary Fibre Concentrates on growth performance and digestive enzyme activities of jundiá (Rhamdia quelen)

Abstract

This study was conducted to investigate the prebiotic effect of different Dietary Fibre Concentrates (DFC) (Mucilage = MG; Pectin = PN or b-glucan + mannan = bg + M) on growth and somatic parameters, body composition and digestive enzyme activities of jundi a (Rhamdia quelen). After acclimation, fish (7.16 AE 0.06 g) were allocated into 24 tanks (30 fish per tank) and triplicate groups were fed with Control diet (0 g kg À1 of DFC); diet supplemented with 5 g kg À1 commercial prebiotic (CP) or diets supplemented with 5 or 10 g kg À1 diet of MG; PN or bg + M. At the end of the trial (8 weeks), growth was significantly (P < 0.05) higher in fish fed diets supplemented with DFCs and did not differ from animals supplemented with CP. The animals that were fed Control diet presented a body protein content higher compared to those supplemented with diets containing pectin or bglucan + mannan (P < 0.05). However, fish fed diets added with b-glucan + mannan yielded a higher level of protein deposited in the whole body. The activity of digestive enzymes was lower in the group supplemented with Pectin. Results indicate that supplementation with DFCs in the diet had positive effects on the performance of jundi a and are prebiotic potential candidate.

Evaluation of immune response and performance of silver catfish fed functional linseed fibres in response to hypoxia stress

“…They also reflected in growth promoter effect (diets 1:2 and 1:4), increasing the final fish weight, without affecting the apparent feed conversion. Similar results were reported for silver catfish (Goulart et al, ) and Oreochromis niloticus (Mombach, ) when evaluating the administration of prebiotic doses of linseed soluble fibre (mucilage) in diets. Demonstrating that the formulation of diets can be manipulated to balance the amount of dietary fibre in order to obtain positive results from its presence.…”

“…Previous studies conducted by our research group have shown that the sources and solubility of fibres cause different effects on animal metabolism and growth (Adorian et al, , ; Goulart et al, ). Among the researched fibre sources, linseed fibre has demonstrated excellent prebiotic functionality (Adorian et al, , ).…”

“…Concentrated plant fibre also showed beneficial effects on the health of different animal species (Adorian et al, , ; Goulart et al, ; Mombach, ; Yarahmadi, Miandare, Farahmand, Mirvaghefi, & Hoseinifar, ). However, the use of plant fibre as a food supplement is still controversial because it may possibly increase the viscosity of the digesta, which undermines the digestibility of the diets.…”

Effects of rice bran protein concentrate on the growth performance and digestive enzyme activities of jundiá ( Rhamdia quelen ) (Quoy and Gaimard, 1824)

“…The final weight and condition factors of the jundiás increased in response to the increase in the level of rice bran protein concentrate. This difference observed between treatments with RBPC may be related to the higher levels of neutral detergent fibre found in the RBPC20 and RBPC30 diets because the fibre that is not digested becomes available for fermentation by the microflora in the posterior gut of the fish, thereby providing a possible prebiotic effect (Goulart et al, ).…”

Importância da fibra alimentar na nutrição de animais não ruminantes

“…Adorian et al (2015) questionaram o efeito da fi bra alimentar em dietas para peixes, constatando que essa fração pode melhorar o desempenho animal, atuando como promotor de crescimento. Da mesma forma, Goulart et al (2015) demonstraram que diferentes concentrados de fi bra alimentar suplementados a dietas de jundiás (Rhamdia quelen) proporcionam efeito semelhante ao proporcionado pela utilização de prebióticos comerciais.…”