<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The potentials of mushroom stalks as supplements in aqua-feeds have been grossly underutilised. Stalk meals of two <italic>Pleurotus</italic> species were analysed for proximate composition, fibre fractions, mineral and phytochemical constituents. <italic>In vitro</italic> digestibility and fermentability were assessed using caecal digesta from <italic>Clarias gariepinus</italic> (n = 108; weight: 138 ± 10.8 g). Stalks of <italic>Pleurotus pulmonarius</italic> and <italic>Pleurotus ostreatus</italic> were air-dried at ambient room temperature and milled. <italic>Pleurotus ostreatus</italic> contained higher (<italic>P</italic> &lt; 0.05) moisture, crude protein, ether extract and crude fibre than <italic>P. pulmonarius</italic> stalks which had higher (<italic>P</italic> &lt; 0.05) nitrogen-free extract. <italic>Pleurotus ostreatus</italic> had higher (<italic>P</italic> &lt; 0.05) neutral detergent fibre, acid detergent fibre, acid detergent lignin and cellulose but lower (<italic>P</italic> > 0.05) hemicellulose than <italic>P. pulmonarius</italic>. Except in manganese and iron content, <italic>P. ostreatus</italic> contained higher (<italic>P</italic> &lt; 0.05) sodium, calcium, magnesium, potassium, phosphorus, copper and zinc than <italic>P. pulmonarius</italic>. Both stalks contained flavonoids, phlobatannin, terpenoid, cardiac glycosides, steroids and antraquinone. Substrate loss was higher (<italic>P</italic> &lt; 0.05) in <italic>P. pulmonarius</italic> (0.20 g) than <italic>P. ostreatus</italic> (0.15 g). Maximum rate of gas production was more (<italic>P</italic> &lt; 0.05) for <italic>P. pulmonarius</italic> (0.16 mL/h) at 4.96 hours compared to 0.04 mL/h at 6.04 hours for <italic>P. ostreatus</italic>. Both stalk meals were partially resistant to <italic>in vitro</italic> digestibility and were fermentable. Hence, they possess favourable prebiotics characteristics and can be used as supplement in aqua feed.</p>
</abstract>

The potentials of mushroom stalks as supplements in aqua-feeds have been grossly underutilised. Stalk meals of two Pleurotus species were analysed for proximate composition, fibre fractions, mineral and phytochemical constituents. In vitro digestibility and fermentability were assessed using caecal digesta from Clarias gariepinus (n = 108; weight: 138 ± 10.8 g). Stalks of Pleurotus pulmonarius and Pleurotus ostreatus were air-dried at ambient room temperature and milled. Pleurotus ostreatus contained higher (P < 0.05) moisture, crude protein, ether extract and crude fibre than P. pulmonarius stalks which had higher (P < 0.05) nitrogen-free extract. Pleurotus ostreatus had higher (P < 0.05) neutral detergent fibre, acid detergent fibre, acid detergent lignin and cellulose but lower (P > 0.05) hemicellulose than P. pulmonarius. Except in manganese and iron content, P. ostreatus contained higher (P < 0.05) sodium, calcium, magnesium, potassium, phosphorus, copper and zinc than P. pulmonarius. Both stalks contained flavonoids, phlobatannin, terpenoid, cardiac glycosides, steroids and antraquinone. Substrate loss was higher (P < 0.05) in P. pulmonarius (0.20 g) than P. ostreatus (0.15 g). Maximum rate of gas production was more (P < 0.05) for P. pulmonarius (0.16 mL/h) at 4.96 hours compared to 0.04 mL/h at 6.04 hours for P. ostreatus. Both stalk meals were partially resistant to in vitro digestibility and were fermentable. Hence, they possess favourable prebiotics characteristics and can be used as supplement in aqua feed.

Chemical characterisation and <italic>in vitro</italic> assessment of two mushroom stalks as prebiotics for <italic>Clarias gariepinus</italic> (Burchell, 1822)

Department of Fish Technology and Product Development

Department of Aquaculture and Fisheries Management

Agricultural Biochemistry and Nutrition Unit, Department of Animal Science

Agricultura Tropica et Subtropica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Chemical characterisation and  assessment of two mushroom stalks as prebiotics for  (Burchell, 1822)

The potentials of mushroom stalks as supplements in aqua-feeds have been grossly underutilised. Stalk meals of two Pleurotus species were analysed for proximate composition, fibre fractions, mineral and phytochemical constituents. In vitro digestibility and fermentability were assessed using caecal digesta from Clarias gariepinus (n = 108; weight: 138 ± 10.8 g). Stalks of Pleurotus pulmonarius and Pleurotus ostreatus were air-dried at ambient room temperature and milled. Pleurotus ostreatus contained higher (P  0.05) hemicellulose than P. pulmonarius. Except in manganese and iron content, P. ostreatus contained higher (P < 0.05) sodium, calcium, magnesium, potassium, phosphorus, copper and zinc than P. pulmonarius. Both stalks contained flavonoids, phlobatannin, terpenoid, cardiac glycosides, steroids and antraquinone. Substrate loss was higher (P < 0.05) in P. pulmonarius (0.20 g) than P. ostreatus (0.15 g). Maximum rate of gas production was more (P < 0.05) for P. pulmonarius (0.16 mL/h) at 4.96 hours compared to 0.04 mL/h at 6.04 hours for P. ostreatus. Both stalk meals were partially resistant to in vitro digestibility and were fermentable. Hence, they possess favourable prebiotics characteristics and can be used as supplement in aqua feed.

The potentials of mushroom stalks as supplements in aqua-feeds have been grossly underutilised. Stalk meals of two Pleurotus species were analysed for...

Chemical characterisation and in vitro assessment of two mushroom stalks as prebiotics for Clarias gariepinus (Burchell, 1822)

Publicado en línea: 20 jul 2021

Páginas: 104 - 115

Recibido: 11 jun 2020

Aceptado: 08 jun 2021

DOI: https://doi.org/10.2478/ats-2021-0011

Palabras clave
Proximate composition, fibre fraction, caecal digesta, fermentability, digestibility

© 2020 Oluwakemi Abimbola Adejonwo et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Chemical characterisation and in vitro assessment of two mushroom stalks as prebiotics for Clarias gariepinus (Burchell, 1822)

Publicado en línea: 20 jul 2021

Páginas: 104 - 115

Recibido: 11 jun 2020

Aceptado: 08 jun 2021

DOI: https://doi.org/10.2478/ats-2021-0011

Palabras claveProximate composition, fibre fraction, caecal digesta, fermentability, digestibility

© 2020 Oluwakemi Abimbola Adejonwo et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Palabras clave
Proximate composition, fibre fraction, caecal digesta, fermentability, digestibility