Evaluation of growth performance and intestinal barrier function in Arctic Charr (Salvelinus alpinus) fed yeast (Saccharomyces cerevisiae), fungi (Rhizopus oryzae) and blue mussel (Mytilus edulis)

Abstract

Arctic charr (Salvelinus alpinus) were fed for 99 days on experimental diets with 40% of fish meal replaced, on a crude protein basis, with intact yeast (Saccharomyces cerevisiae) (ISC), extracted yeast (ESC), Rhizopus oryzae fungus (RHO) or de-shelled blue mussels (Mytilus edulis) (MYE). The fish were evaluated for growth performance, nutrient digestibility and fish intestinal function. Growth performance, retention of crude protein and sum of amino acids were not affected in fish fed diets ISC or MYE compared with those fed the reference (REF) diet. However, fish fed diet ISC displayed decreased digestibility of crude protein and indispensable amino acids and decreased intestinal barrier function compared with fish fed the REF diet. Fish fed diet ESC exhibited decreased growth performance and protein retention, but had comparable digestibility to fish fed the REF diet. Fish fed diets MYE and RHO showed similar performance in terms of growth, nutrient digestibility and intestinal barrier function. Overall, the results indicated that blue mussel and intact S. cerevisiae yeast are promising protein sources for Arctic charr.

Dietary live yeast and increased water temperature influence the gut microbiota of rainbow trout

“…; Vidaković et al . ), and thus increased digestibility at warmer temperature may have a larger effect on salmonids fed yeast. These results indicate that feeding live yeast in warm rather than cold water, e.g.…”

“…), Arctic charr ( Salvelinus alpinus ) (Vidaković et al . ) and lake trout ( Salvelinus namaycush ) (Rumsey et al . ).…”

Yeast derived from lignocellulosic biomass as a sustainable feed resource for use in aquaculture

“…Hence, it seems likely that the whole yeast biomass, after rupturing of cell walls, may be the most attractive feed ingredient, by combining the properties as a source of nutrients and bioactive components. Extrusion of feed may cause partial disruption of yeast cell walls and potentially increase protein and amino acid digestibility . Further research is warranted to determine optimal extrusion conditions for fish feed with contents of different yeast whole cell products.…”

“…As an easily available natural industrial product, strains of S. cerevisiae have been used as a protein source in a number of studies with different fish species. Several growth performance studies have shown that intact S. cerevisiae can be used to partly replace fishmeal protein in diets for fish species such as sea bass; the omnivore pacu, Piaractus mesopotamicus ; Nile tilapia, Oreochromis niloticus ; Atlantic salmon; Thai Panga, Pangasianodon hypophthalmus × Pangasius bocourti ; and Arctic char . A majority of these studies have been carried out with isonitrogenous and isoenergetic diets, with or without balancing amino acid composition with synthetic amino acids.…”

Fermentasi Menggunakan Ragi Tempe Sebagai Cara Biologis Pengapungan Pakan Ikan

“…Selain makanan untuk manusia, Rhizopus sp. juga dikembangkan sebagai makanan hewan atau pakan, baik sebagai agen fermentasi untuk memperbaiki kualitas nutrisi bahan pakan (Umam et al 2015;Kurniati et al 2017;Valdez-González et al 2017), maupun sebagai biomassa atau komponen bahan pakan kaya nutrisi, khususnya protein (Ferreira et al 2013;Abro et al 2014a;Abro et al 2014b;Langeland et al 2016;Satari et al 2016;Vidakovic et al 2016;FazeliNejad et al 2016;Souza Filho et al 2017).…”