Impact of dietary supplementation with Antarctic krill meal on growth performance, biochemical parameters, and antioxidant status in Coho Salmon (Oncorhynchus kisutch) post-smolts

IF 2.8 2区生物学 Q1 MARINE & FRESHWATER BIOLOGY

Frontiers in Marine Science Pub Date : 2025-04-11 DOI:10.3389/fmars.2025.1553629

Hairui Yu, Leyong Yu, Abdur Rahman, Sattanathan Govindharajan, Yuzhuo Zhang, Guoqing Wang, Lingyao Li

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引用次数: 0

Abstract

Due to the increasing trend in aquaculture and fisheries production, conventional feed resources, especially protein ingredients, are overburdened, and sometimes their price fluctuations limit quality feed formulations for farmers, thus leading to the exploration of alternative protein feed resources. Antarctic krill meal (AKM) has emerged as a potential candidate ingredient for sustainable and suitable partial replacement of conventional fish meal. A 10-week feeding trial was designed to investigate the effects of different concentrations of AKM on the growth performance, antioxidant capacity, and serum biochemical indices of coho salmon (Oncorhynchus kisutch) post-smolts. In total, 150 post-smolt fish with an average initial weight of 178.17 ± 0.73 g were divided into five groups with three replicates in each group and 10 fish in each replicate. Five experimental diets were formulated by substituting 0%, 3%, 6%, 9%, and 12% fish meal (protein source) with AKM (protein source), which were designated AKM0 (the control), AKM3, AKM6, AKM9, and AKM12, respectively. The results showed that the addition of AKM to the salmon diet increased (P < 0.05) the weight gain (WG), specific growth rate (SGR), feed conversion ratio (FCR), and protein efficiency ratio (PER). There was no effect (P > 0.05) on body composition and essential amino acid profile of the meat except for methionine, isoleucine, lysine, and threonine. The liver concentrations of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and malondialdehyde (MDA) significantly decreased while the concentration of catalase and superoxide dismutase (SOD) increased in the AKM supplemented groups compared to the control group. The serum concentrations of ALT and AST decreased (P < 0.05) while total cholesterol, triglyceride, and total protein content increased (P < 0.05) in the AKM treatment groups compared to the control. Based on the results of this study, supported by polynomial quadratic regression analyses of WG, SGR, FCR, and PER, we conclude that 6.73%–7.08% AKM is the best possible suitable inclusion level range to partially replace conventional fish meal in the diet of coho salmon post-smolt.

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来源期刊

Frontiers in Marine Science Agricultural and Biological Sciences-Aquatic Science

CiteScore

5.10

自引率

16.20%

发文量

2443

审稿时长

14 weeks

期刊介绍： Frontiers in Marine Science publishes rigorously peer-reviewed research that advances our understanding of all aspects of the environment, biology, ecosystem functioning and human interactions with the oceans. Field Chief Editor Carlos M. Duarte at King Abdullah University of Science and Technology Thuwal is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, policy makers and the public worldwide. With the human population predicted to reach 9 billion people by 2050, it is clear that traditional land resources will not suffice to meet the demand for food or energy, required to support high-quality livelihoods. As a result, the oceans are emerging as a source of untapped assets, with new innovative industries, such as aquaculture, marine biotechnology, marine energy and deep-sea mining growing rapidly under a new era characterized by rapid growth of a blue, ocean-based economy. The sustainability of the blue economy is closely dependent on our knowledge about how to mitigate the impacts of the multiple pressures on the ocean ecosystem associated with the increased scale and diversification of industry operations in the ocean and global human pressures on the environment. Therefore, Frontiers in Marine Science particularly welcomes the communication of research outcomes addressing ocean-based solutions for the emerging challenges, including improved forecasting and observational capacities, understanding biodiversity and ecosystem problems, locally and globally, effective management strategies to maintain ocean health, and an improved capacity to sustainably derive resources from the oceans.