RT Journal Article
T1 Environmental enrichment improves growthandfillet quality in rainbow trout
A1 De la Llave-Propín, Alvaro
A1 Martínez Villalba, Andrea
A1 Villarroel, Morris
A1 Pérez Marcos, Concepción
A1 González De Chávarri Echániz, Elisabeth
A1 Díaz Díaz Chirón, María Teresa
A1 Cabezas Albéniz, Almudena
A1 González Garoz, Roberto
A1 Fuente Vázquez, Jesús De La
A1 Bermejo Poza, Rubén
AB Background: Some environmental enrichment methods, such as occupational enrichment (OE), can improve fish growth, but little is known about its effects on fillet quality. In this study, we evaluated the effects of OE using underwater currents on different aspects of fillet quality and muscle metabolism in rainbow trout (Oncorhynchus mykiss), before and after a handling procedure (fasting). The trout were placed in groups of 30 in separate tanks in three treatments for 30 days: no artificial currents (CON), randomly fired underwater currents (RFC), and continuous underwater currents (CUC). Additionally, half of the individuals in each treatment were fasted (5 days, 45.2 °C days).Results: Slaughter weight, condition factor, and relative growth were lower in CON fish, indicating a positive effect of OE on growth. Rigor mortis, muscle pH, and muscle glycogen levels were similar among treatments, indicating no effect of OE on classical measures of fillet quality. However, significant differences were found regarding fillet colour and muscle enzymes. The fillets of RFC fish were more salmon-pink in colour, which is favoured by consumers. Also, activity levels of pyruvate kinase and glycogen phosphorylase in muscle were significantly higher in CUC fish, probably due to increased energy demands, as pumps were on continually in that treatment.Conclusion: Overall, RFC fish seemed to have received enough stimulation to improve growth while not being excessive in terms of exhausting the animals (avoiding negative effects on muscle metabolism), whereas OE may have provided a hormetic effect, allowing fish to better adjust to fasting. © 2023 Society of Chemical Industry.
PB Wiley
SN 0022-5142
YR 2024
FD 2024-01-18
LK https://hdl.handle.net/20.500.14352/103834
UL https://hdl.handle.net/20.500.14352/103834
LA eng
NO De la Llave-Propín, Á., Martínez Villalba, A., Villarroel, M., Pérez, C., González de Chávarri, E., Díaz, M.T., Cabezas, A., González Garoz, R., De la Fuente, J. and Bermejo-Poza, R. (2024), Environmental enrichment improves growth and fillet quality in rainbow trout. J Sci Food Agric, 104: 3487-3497. https://doi.org/10.1002/jsfa.13234
NO Universidad Complutense de Madrid
NO Banco Santander
DS Docta Complutense
RD 13 abr 2025