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Open AccessJournal ArticleDOI

Hermetia illucens and Poultry by-Product Meals as Alternatives to Plant Protein Sources in Gilthead Seabream ( Sparus aurata) Diet: A Multidisciplinary Study on Fish Gut Status

TLDR
In this article, poultry by-products and Hermetia illucens meal were used to replace the vegetable protein fraction in diets totally deprived of fish meal intended for gilthead seabream (Sparus aurata).
Abstract
The attempt to replace marine-derived ingredients for aquafeed formulation with plant-derived ones has met some limitations due to their negative side effects on many fish species. In this context, finding new, sustainable ingredients able to promote fish welfare is currently under exploration. In the present study, poultry by-products and Hermetia illucens meal were used to replace the vegetable protein fraction in diets totally deprived of fish meal intended for gilthead seabream (Sparus aurata). After a 12-week feeding trial, a multidisciplinary approach including histological, molecular, and spectroscopic techniques was adopted to investigate intestine and liver responses to the different dietary formulations. Regardless of the alternative ingredient used, the reduction in dietary vegetable proteins resulted in a lower incidence of intestine histological alterations and inflammatory responses. In addition, the dietary inclusion of insect meal positively affected the reduction in the molecular inflammatory markers analyzed. Spectroscopic analyses showed that poultry by-product meal improved lipid absorption in the intestine, while insect meal induced increased liver lipid deposition in fish. The results obtained demonstrated that both poultry by-products and H. illucens meal can successfully be used to replace plant-derived ingredients in diets for gilthead seabream, promoting healthy aquaculture.

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Use of black soldier fly (Hermetia illucens L.) larvae meal in aquafeeds for a sustainable aquaculture industry: A review of past and future needs

TL;DR: In this paper , the feasibility of using Hermetia illucens larval (BSFL) meal as an alternate protein source in aquaculture has been evaluated for feed, its sustainable production and challenges.
Journal ArticleDOI

Brewery by-products (yeast and spent grain) as protein sources in gilthead seabream (Sparus aurata) feeds

TL;DR: Two trials were conducted to test the effect of partial replacement of fishmeal by two brewery industry by-products, yeast and spent grain, included in isoproteic and isolipidic diets for gilthead sea bream, finding them to be a potential source of protein to reduce the use of plant proteins or fish/animal by- products (trimmings) and increase the sustainability of both sectors.
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Appetite Regulation, Growth Performances and Fish Quality Are Modulated by Alternative Dietary Protein Ingredients in Gilthead Sea Bream (Sparus aurata) Culture.

TL;DR: In this article, the authors compared growth, gene expression involved in appetite regulation, physical characteristics, and chemical composition of Sparus aurata fed alternative protein sources, including Hermetia illucens pupae meal (H), poultry byproduct meal (PBM), red swamp crayfish meal (RC10), and from a blend (2:1, w:w) of Tisochrysis lutea and Tetraselmis suecica (MA10) dried biomasses.
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Comparing black soldier fly (Hermetia illucens) larvae versus prepupae in the diets of largemouth bass, Micropterus salmoides: Effects on their growth, biochemical composition, histopathology, and gene expression

TL;DR: Although the nutritional value of BSFL and BSFP depends on their diet, this study clearly demonstrates that BSFL is better for M. salmoides compared to BSFP, which may be related to the high chitin content of the BSFP.
Journal ArticleDOI

Application of laboratory methods for understanding fish responses to black soldier fly (Hermetia illucens) based diets

TL;DR: A major challenge for development of sustainable aquafeeds is its dependence on fish meal and fish oil, and replacement with more sustainable, nutritious and safe ingredients is now a priority.
References
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Journal ArticleDOI

Expanding the utilization of sustainable plant products in aquafeeds: a review

TL;DR: This document reviews various plant feedstuis, which currently are or potentially may be incorporated into aquafeeds to support the sustainable production of various ¢sh species in aquaculture and strategies and techniques to optimize the nutritional composition and limit potentially adverse eiects of bioactive compounds are described.
Journal ArticleDOI

Utilization of plant proteins in fish diets: effects of global demand and supplies of fishmeal

TL;DR: For some species of farmed fish, continued reduction in fishmeal and fish oil levels is likely and complete replacement of fishmeal in feeds for marine species is more difficult and will require further research efforts to attain.
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Effects of graded levels of standard soybean meal on intestinal structure, mucosal enzyme activities, and pancreatic response in Atlantic salmon (Salmo salar L.)

TL;DR: A negative, dose-dependent effect of SBM was observed on nearly all performance parameters with a notable exception of feed intake and the results suggest that caution should be exercised in the use of even low levels of extracted SBM in salmon feeds.
Journal ArticleDOI

Carbohydrates in fish nutrition: digestion and absorption in postlarval stages

TL;DR: This review summarizes information regarding digestion and absorption of carbohydrates in cultivated fish and reports results of studies of digestive enzymes, e.g. amylase, chitinase, cellulase and brush border disaccharidases, which appear to be molecularly closely related and to have characteristics comparable to mammalian amylases.
Journal ArticleDOI

Review on the use of insects in the diet of farmed fish: Past and future

TL;DR: The present review discusses the potential of locusts, grasshoppers, termites, yellow mealworms, Asiatic rhinoceros beetles, superworms, domesticated silkworms, common houseflies, common mosquitoes and black soldier flies for use as fishmeal and/or fish oil replacement in the fish diet.
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