Genetic selection for high growth improves the efficiency of gilthead sea bream (Sparus aurata) in using novel diets with insect meal, single-cell protein and a DHA rich-microalgal oil
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Author
Carvalho, Marta
Ginés, Rafael
Martín, Ignacio
Zamorano, María Jesús
Acosta, Félix
Fontanillas, Ramon
Montero, Daniel
Publication date
2023-08-29ISSN
0044-8486
Abstract
Genetic selection and novel raw materials for aquafeeds are current key tools in the ongoing effort to increase the
productivity, efficiency, and sustainability of the aquaculture sector. Selective breeding could also improve the
utilization of novel dietary formulations with emergent ingredients. Gilthead sea bream juveniles, either coming
from a selective breeding program based on growth traits, or a non-selected population, were nutritionally
challenged with two novel dietary formulations that were compared with a Control diet based on 15% FM and
6% FO dietary commercial levels for this species. The novel formulations included an insect meal diet (INS) at 5%
of the diet to replace 33.3% of the dietary FM, or a single-cell protein diet (SCP) at 10% of the diet and to replace
66.7% of the dietary FM. Fish oil was also totally replaced in these diets by a blend of poultry oil and Veramaris
algal oil. Better growth and feed utilization of the selected genotype compared to non-selected fish was observed,
at any of the diets assayed. INS and SCP novel diets reduced general performance of fish by reducing feed intake.
However, selected fish fed novel diets showed very similar growth and lower feed conversion ratio compared
with non-selected fish fed a control diet. The novel formulations increased n-3 LC-PUFA in fish tissues, particularly DHA, irrespective of the genotype, as a result of the dietary inclusion of the DHA-rich microalgal oil.
Neither genetic selection nor the use of novel raw materials affected fillet proximate composition and consequently, sea bream fillet quality in terms of texture and sensorial perception of consumers. Overall, the results
reaffirm the positive effects of selective breeding programs in improving sea bream key productive indicators, as
well as support the use of novel dietary formulations, using insect meal from H. illucens, single-cell protein from
M. capsulatus as partial replacers of FM in diets for gilthead sea bream (33 and 66% of replacement, respectively),
and a blend of DHA-rich microalgal and poultry oils as total replacer of FO.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
639 - Hunting. Fishing. Fish breeding
Pages
16
Publisher
Elsevier
Is part of
Aquaculture
Citation
Carvalho, Marta, Rafael Ginés, Ignacio Martín, María Jesús Zamorano, Félix Acosta, Ramon Fontanillas, Silvia Torrecillas, and Daniel Montero. 2024. "Genetic Selection For High Growth Improves The Efficiency Of Gilthead Sea Bream (Sparus Aurata) In Using Novel Diets With Insect Meal, Single-Cell Protein And A DHA Rich-Microalgal Oil". Aquaculture 578: 740034. doi:10.1016/j.aquaculture.2023.740034.
Grant agreement number
EC/H2020/818367/EU/Genomic and nutritional innovations for genetically superior farmed fish to improve efficiency in European aquaculture/AquaIMPACT
Program
Aqüicultura
This item appears in the following Collection(s)
- ARTICLES CIENTÍFICS [2555]
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