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Aquaculture in Bangladesh has expanded, diversified, and intensified over the last decades. Control of infectious diseases is critical for a successful and sustainable aquaculture. In this study, we examined the extent of use of probiotics in aquaculture of Bangladesh, using a questionnaire. Data were collected from 200 individual respondents from commercial fish farms located at Mymensingh, Rajshahi, Jashore, and Cumilla (50 from each) regions. A total of 88 different probiotics products from 36 companies, mostly imported, are used in the aquaculture in Bangladesh. Although in most cases the purpose of the use of probiotics is not clear for the farm owners, several representatives of different companies suggested the use of their different probiotic products, for different situations. Most of the farm owners responded that they used probiotics to get higher production by promoting the growth of fish. A considerable number of farm owners responded that probiotics reduced mortality as well as reduced gas emissions from the aquaculture ponds. Although the use of commercial probiotics varies from region to region, Pondcare and Safegut, the product of SK + F, are mostly used in aquaculture based on the responses (32% and 21% of respondents, respectively). To safeguard and clarify the value and effectiveness of these goods, the fish feed manufacturers and regulatory authorities should monitor their production, collection, and marketing. [ABSTRACT FROM AUTHOR]

The aquaculture sector is steadily growing due to the increasing demand for healthy and cheap animal protein sources. Consequently, the high demand for nutritionally balanced aquafeed increases, but requires sustainable and feasible feed ingredients. However, the high cost of fish and soybean meals opens the door to looking for suitable non‐traditional feed ingredients. The processing of fruits results in high amounts of waste and by‐products, which are risky for the environment but rich in nutritional value. Recycling fruit waste in aquafeed is successfully applied and results in high growth performance, productivity and well‐being of aquatic animals. Fruit by‐products are also potential functional feed additives devoted to their high content of polyphenols, flavonoids, vitamins, minerals, polysaccharides and peptides. As functional components, fruit by‐products enhance the antioxidative and immune responses of aquatic animals and increase their tolerance for biotic and abiotic stressors. In light of reducing antimicrobial chemicals in aquaculture to mitigate antimicrobial resistance, dietary feed additives extracted from fruit by‐products can be used as eco‐friendly substances. The investigations involved in evaluating the incorporation of fruit by‐products and their derivatives in aquafeeds are explored in this review. An overview of the possibility of using non‐traditional plant products in aquaculture as a feasible and sustainable concept is addressed in this review. Academic knowledge with enough information for more development and research to maximise the utilisation of fruit by‐products in the aquafeed industry is also enriched. [ABSTRACT FROM AUTHOR]

This document is an editorial introducing a special issue of the journal Aquaculture and Fisheries on friendly nutritional strategies for sustainable aquaculture. The issue explores the relationship between nutrition and immunity in aquatic animals, focusing on feed additives derived from sustainable sources. The articles in the issue cover topics such as plant-based proteins as fish meal alternatives, the roles of polysaccharides in tilapia farming, the use of prebiotic mixtures as feed additives, and the benefits of probiotics and other supplements for fish health. The authors hope that these insights will contribute to the development of better nutritional strategies for sustainable aquaculture, aligning with the United Nations' Sustainable Development Goals. [Extracted from the article]