Valorization of Seaweed Wracks: Inclusion As Additive in Diets for Grass Carp ()

Overview

Journal Aquac Nutr

Publisher Wiley

Date 2023 Mar 2

PMID 36860445

Authors

Ana Galindo

Covadonga Rodriguez

Diana B Reis

Manuel Marrero

Nieves G Acosta

Maria Carmo Barreto

Ignacio A Jimenez

Jaime de Urioste

Marianna Venuleo

Jose A Perez

Affiliations

Soon will be listed here.

Abstract

Macroalgae have been recently described as a potential ingredient for aquafeeds, exerting several physiological benefits. Grass carp () is a freshwater species, which has been the major fish species produced in the world in the last years. In order to determine the potential use of macroalgal wracks in fish feeding, juveniles were fed with an extruded commercial diet (CD) or the CD supplemented with 7% of a wind dried-powder (1 mm) from either a multispecific macroalgal wrack (CD + MU7) or a monospecific macroalgal wrack (CD + MO7) obtained from Gran Canaria island (Spain) coasts. After 100 days of feeding, survival, fish weight, and body indexes were determined, and muscle, liver, and digestive tract samples were collected. The total antioxidant capacity of macroalgal wracks was analyzed by assesing the antioxidant defense response and digestive enzymes activity in fish. Finally, muscle proximate composition, lipid classes (LC), and fatty acid (FA) profiles were also studied. Our results suggest that dietary inclusion of macroalgal wracks does not have negative effects on growth, proximate, and lipid composition, antioxidative status, or digestive capacity of . In fact, both macroalgal wracks caused a general lower fat deposition, and the multispecific wrack enhanced catalase activity in the liver.

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