Algae as Aquafeed Ingredients and Additives for Sustainable Aquaculture

A special issue of Fishes (ISSN 2410-3888). This special issue belongs to the section "Nutrition and Feeding".

Deadline for manuscript submissions: closed (15 June 2024) | Viewed by 1449

Special Issue Editors


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Guest Editor
Environmental Studies Department, University of California, Santa Cruz, CA 95064, USA
Interests: interests: ecological aquaculture; fish nutrition; aquaculture feed design for sustainable aquaculture; formulation of low-pollution feeds; evaluate algae as alternative aquafeed ingredients; fish and shellfish nutritional requirements; digestibility of feed ingredients; dietary nutrient interaction in fish and effects on physiology and gene expression; strategies to prevent off-flavors in fish

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Guest Editor
Institute for Water& Wastewater Technology, Durban University of Technology, Durban 4001, South Africa,
Interests: algae; fish feed; aquaculture; algae biorefinery; fish

Special Issue Information

Dear Colleagues,

Aquaculture is the world’s fastest-growing food sector and an essential source of protein and essential fatty acids for humans. Aquafeed manufacturers over-rely on ocean-derived fishmeal (FM) and fish oil (FO). However, decreasing FMFO supply and increasing costs are concerns for the sustainability and growth of the aquaculture industry. These concerns drive the global search for alternatives, substituting FMFO to manufacture high-quality feeds for aquaculture. Microalgae represent a more sustainable alternative because they can be produced in large quantities in nonarable or technologically controlled conditions. They show promise as potential replacements for FMFO and supplements or additives in feeds for aquaculture because of their elevated fatty acid profiles, high protein content, omega-three polyunsaturated fatty acids, carotenoids, vitamins, and β-glucan. Recent industrial-scale production of microalgae for biofuels and human nutritional supplements has also opened up the economic opportunity to use them in aquafeeds. This is a topical subject and an excellent opportunity to showcase the scientific excellence of using different microalgae in the rearing of aquaculture species to investigate the growth, feed utilization, physiological activity, stress response, disease resistance, and fillet quality! I encourage you to submit relevant manuscripts and contribute to this Special Issue of the journal Fishes.

Dr. Pallab Sarker
Dr. Faiz Ahmad Ansari
Guest Editors

Manuscript Submission Information

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Keywords

  • microalgae
  • aquafeeds
  • sustainable aquaculture
  • fishmeal and fish oil replacement
  • supplements
  • omega 3
  • bioactive compounds
  • feed additives

Published Papers (1 paper)

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Research

12 pages, 1771 KiB  
Article
Effect of Replacing Fishmeal with Algal Meal on Growth Parameters and Meat Composition in Rainbow Trout (Oncorhynchus mykiss W.)
by Katya Velichkova, Ivaylo Sirakov, Stefka Stoyanova, Apostol Simitchiev, David Yovchev and Kamelia Stamatova-Yovcheva
Fishes 2024, 9(7), 249; https://doi.org/10.3390/fishes9070249 - 26 Jun 2024
Viewed by 551
Abstract
Aquafarms should reduce the use of fishmeal and fish oil in nutritional feed. One such accessible and relatively inexpensive food component that could successfully meet the challenge posed by aquaculture is algae. The objective of the present study was to evaluate the algae [...] Read more.
Aquafarms should reduce the use of fishmeal and fish oil in nutritional feed. One such accessible and relatively inexpensive food component that could successfully meet the challenge posed by aquaculture is algae. The objective of the present study was to evaluate the algae meal inclusion of Chlorella and Spirulina sp. in a diet for rainbow trout, evaluating its effects on fish growth, histological parameters and fillet quality. Experiments were carried out to replace 50% and 100% of fishmeal with Spirulina sp. and Chlorella vulgaris in feed for rainbow trout (Oncorhynchus mykiss W.) cultured in a recirculation system. At the end of the experimental period, the highest mean live weight was measured in rainbow trout fed a feed containing 50% algal meal in the feed. The absorptive vacuolization of cells was increased the most and lamina propria was average thickened when fed 50% algae diets. Fat droplets in the hepatocytes were larger in the 50% algae meal fed group, and their nuclei were replaced in the peripheral zone of the cells. Substitution of fishmeal with 50% algal meal in fish feed resulted in a 36.44% reduction in the lipid content of rainbow trout fillets compared to control fish. Full article
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