RT info:eu-repo/semantics/article
T1 Juvenile tench (            Tinca tinca            L.) response to practical diets with different replacement levels of fish meal by pea protein concentrate supplemented with methionine
A1 Carral Llamazares, José Manuel
A1 García, Teresa
A1 Sáez-Royuela Gonzalo, María
A1 Celada Valladares, Jesús Domingo
A2 Producción Animal
K1 Producción animal
K1 3104 Producción Animal
AB The effects of methionine supplementation in diets with different replacement levels of fish meal (FM) by pea protein concentrate (PPC) on survival, growth performance and body composition of juvenile tench (0.39 g of initial weight) were studied in a 90-day experiment. Six practical diets (50% crude protein) differing in replacement level of FM by PPC were tested: 0% (control diet), 35%,45%, 60%, 75% or 85%, corresponding to 0, 285, 366, 487, 608 and 685.4 g PPC kg−1 diet respectively. To provide the same amount as in control diet, methionine was included from the 45% substitution level. Survival rates were high, between 93.7% and 100%, without differences among treatments. Juveniles fed 75% and 85% of replacement diets showed lower (p < 0.05) weight and specific growth rate, which cannot be attributed to methionine deficiency. In all treatments, percentages of fish with externally visible deformities were low (under 0.1%). The increase in PPC diet content resulted in a significant reduction of lipid content in whole-body juvenile. Minimum methionine requirements for juvenile tench could be estimated in 10 g kg−1 diet and supplementation over this amount would be not necessary. Juvenile tench exhibited a high tolerance to PPC dietary content, up to 487 g kg−1, without affecting growth performance, which make possible to consider this vegetal source of protein as a suitable substitute to FM.
PB Wiley-Blackwell
SN 1355-557X
LK http://hdl.handle.net/10612/14523
UL http://hdl.handle.net/10612/14523
NO .
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 26-abr-2024