Frações solúveis e insolúveis do hidrolisado proteico de resíduo de sardinha na alimentação do jundiá: consumo de ração e excreção de amônia

Abstract

Frações solúveis e insolúveis do hidrolisado proteico de resíduo de sardinha na alimentação do jundiá: consumo de ração e excreção de amônia As dietas foram isoproteicas (39% PB) e isoenergéticas (4450kcal EB/kg), e as frações do hidrolisado foram incluídas de forma a fornecerem 50% da proteína das rações. A fração solúvel apresentou grau de hidrólise mais elevado (20,1%) em relação à fração insolúvel (9,97%). As duas dietas contendo a fração solúvel do hidrolisado foram as mais consumidas. Com cinco horas de avaliação, a dieta contendo a fração solúvel do hidrolisado aumentou a excreção de amônia em relação à dieta contendo a fração insolúvel. Após 25 horas, a fração solúvel também aumentou a excreção de amônia, mas, desta vez, em relação à dieta contendo a combinação das duas frações. Conclui-se que a inclusão da fração solúvel do hidrolisado de músculo de sardinha estimula o consumo de ração, todavia, quando a inclusão é elevada, pode haver aumento da excreção de amônia de juvenis de jundiá.Palavras-chave: hidrólise enzimática, nutrição de peixes, resíduo industrial, Rhamdia quelen, Sardinella sp. ABSTRACT

Fish meal replaced by hydrolysed soybean meal in diets increases growth and improves the antioxidant defense system of silver catfish ( Rhamdia quelen )

“…The DH obtained in the HSM was 14.1%, which is low when compared to previous studies (Fabregat et al, ; Venturin et al, ; Wosniak et al, ). The peptide profile analysis shows that 39.8% of the HSM had a molecular weight of less than 10 kDa.…”

“…We emphasize that this is the first work with soybean hydrolyzed to silver catfish. Other works with the species have used hydrolysates from animal origin (Fabregat et al, ; Venturini et al, ; Wosniak et al, ). Thus, the partial substitution of fishmeal with HSM in diets for juvenile silver catfish was evaluated for growth, protein metabolism and antioxidant activity.…”

Quality of water from fish farms and histopathological analysis of tilapia ( Oreochromis sp.) in São José de Ribamar and Paço do Lumiar, state of Maranhão, Brazil

“…In P2, ammonia values were within standard considered sublethal, being able to increase with increasing temperature and pH. According to Pinto and Mercante (2003) and Fabregat et al, (2016), high ammonia levels may elevate blood pH, reduce fish permeability, reduce internal ion concentration, increase oxygen uptake in tissues affecting gills and reducing blood's ability to transport oxygen.…”

Tilapia protein hydrolyzate improves growth performance, protein absorption and antioxidant status in Silver catfish ( Rhamdia quelen )

“…The degree of hydrolysis (DH) of the TPH was 20.1%, which is similar to the 10%–20% observed for the Sardinella sp. muscle hydrolyzate (Fabregat et al, ; Venturin et al, ; Wosniak et al, ). The DH indicates the percentage of broken peptide bonds, which affect the physicochemical and functional properties of the hydrolyzate (Wasswa, Tang, Gu, & Yuan, ).…”

“…The Silver catfish ( Rhamdia quelen ) is an omnivorous fish that has nutritional requirements similar to carnivorous species (Bibiano Melo, Lundstedt, Metón, Baanante, & Moraes, ; Salhi, Bessonart, Chediak, Bellagamba, & Carnevia, ). The use of FPH in Silver catfish diets reduces the excretion of nitrogen compounds in water (Fabregat et al, ; Venturin et al, ). However, the biochemical routes in the protein fraction metabolism of hydrolyzates were not elucidate.…”