on 14 septiembre, 2018 by igjaugar in Ana Tomás Vidal, Guillem Estruch Cucarella, Miguel Jover Cerdá, Publicaciones, Raquel Monge Ortiz, Sergio Godoy, Silvia Martínez Llorens, Tesis doctorales, Comentarios desactivados en Nuevo artículo

Nuevo artículo

El Grupo de Acuicultura y Biodiversidad ha publicado un trabajo sobre la sustitución de harina de pescado por fuentes proteicas, publicando en la revista Archives of Animal Nutrition el artículo “Inclusion of alternative marine by-products in aquafeeds with different levels of plant-based sources for on-growing gilthead sea bream (Sparus aurata, L.): effects on digestibility, amino acid retention, ammonia excretion and enzyme activity”. Este trabajo forma parte de la tesis doctoral de Guillem Estruch Cucarella, la cual defenderá próximamente.

Para más detalles, se puede consultar el artículo en el siguiente enlace https://www.tandfonline.com/doi/abs/10.1080/1745039X.2018.1472408

Inclusion of alternative marine by-products in aquafeeds with different levels of plant-based sources for on-growing gilthead sea bream (Sparus aurata, L.): effects on digestibility, amino acid retention, ammonia excretion and enzyme activity

Los autores de este trabajo son:

Guillem Estruch, Ana Tomás-Vidal, Asmaa M. El Nokrashy, Raquel Monge-Ortiz, Sergio Godoy-Olmos, Miguel Jover Cerdá & Silvia Martínez-Llorens

 

ABSTRACT

The search for new sustainable aquafeeds for the species with greater economic importance, such as the gilthead sea bream in Europe, is one of the main challenges in the aquaculture sector. The present work tested fishmeal replacement by a mixture of plant meals at different levels, as well as the use of marine by-products with attractant properties and high-quality protein in high plant protein diets. In order to do that, effects on growth and biometric parameters, digestibility, amino acid retention, excreted ammonia and proteases and amylase activity were assessed, using six different diets: FM100 (100% of protein provided by fishmeal), FM50 (50% of replacement), FM25 (75% of replacement) and FM0 (100% of replacement), but also FM25+ (75% of replacement and 15% of squid and krill meal inclusion), and FM0+ (100% of replacement and 15% of squid and krill meal inclusion). In group FM0, a clear impact of dietary changes was observed on growth, survival and ammonia excretion. Amino acid retention in group FM0+ was also significantly affected, which can be explained by the limited content of certain amino acids in this diet. On the other hand, no significant differences were observed in most biometric parameters or in enzyme activity. In conclusion, complete fishmeal replacement can be achieved by using a mixture of plant-based sources, but supplementation with complementary marine ingredients can prevent detrimental effects on growth, survival, nutritional parameters and protein metabolism.

 

 

Funding

This work was supported by the Vicerrectorat d’Investigació, Innovació i Transferència of the Universitat Politècnica de València, within the project Aquaculture feed without fishmeal (SP20120603). URLs of funder: http://www.upv.es/entidades/VIIT/info/indexnormalc.htm.

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