How do novel feed formulations affect growth performance, oxidative stress and immune response of atlantic salmon?

• Main Authors: Fernandes, A. M., Conceição, Luis E. C., Calduch-Giner, Josep A., Pereira, G. V., Micallef, G., Siriyappagouder, P., Glencross, Brett D., Naya-Català, Fernando, Piazzon de Haro, María Carla, Sitjà-Bobadilla, Ariadna, Johansen, J., Pérez-Sánchez, Jaume, Fernandes, Jorge M. O.
• Other Authors: European Commission, Nord University
• Format: Conference Object
• Language: unknown
• Published: 2021
• Subjects: Atlantic salmon; Salmo salar
• Online Access: http://hdl.handle.net/10261/267481; https://doi.org/10.13039/501100000780

Trabajo presentado en la International Conference & Exposition Aquaculture Europe, celebrada en Funchal, Maderia (Portugal) del 04 al 07 de octubre de 2021. [Introduction]: The aquaculture industry continues to grow faster than any other sector of food production. The need to make aquaculture as sustainable and more environmentally conscious as possible is becoming clearer everyday (FAO, 2020). With this in mind, the replacement of fishmeal and fish oil in aquafeeds has been studied in Atlantic salmon (Salmo salar) (e.g., Bendiksen et al., 2011) with many products emerging as potential alternatives to conventional ones (e.g., Hodar et al., 2020). One of the main objectives of the EU project GAIN is to evaluate new ingredients that are already commercially available using different formulation concepts that consider all the fish nutritional needs. GAIN diets are based on circular economy principles and maximize resource efficiency, while contributing to zero waste in the agri-food value chain, being cost-effective feeds, and having good social acceptability. The present study aims to understand the actual effects of these novel feed formulations on growth performance, nutritional status, immunity and oxidative status. [Methods]: Quadruplicate groups of Atlantic salmon were fed ad libitum with three different diets. Two diets were developed to facilitate the eco-intensification of aquaculture through increased circularity and resource utilization (NOPAP - formula without processed animal protein - and PAP - formula with processed animal protein). The third diet was a commercial-like formulation that was used as a control. After a 96-day feeding trial, plasma samples were collected to evaluate humoral parameters (protease, anti-protease, bactericidal activity, and IgM). Liver and head kidney tissues (collected at day 45 and 96) were used for the simultaneous profiling by PCR array of a panel of 38 or 28 genes, respectively, as markers of growth performance, lipid and energy metabolism, and immune and ...