Largemouth Bass Aquaculture

A special issue of Fishes (ISSN 2410-3888).

Deadline for manuscript submissions: closed (30 June 2025) | Viewed by 438

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Guest Editor
Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
Interests: aquaculture; nutrient requirements; nutrient metabolism; stress regulation; immune regulation
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Guest Editor
Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
Interests: aquaculture; nutrient requirements; nutrient metabolism; stress regulation; immune regulation

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Guest Editor
College of Animal Science, Anhui Science and Technology University, Fengyang 233100, China
Interests: aquaculture; nutrient requirements; nutrient metabolism; stress regulation; immune regulation

Special Issue Information

Dear Colleagues,

Largemouth bass is a kind of fish with high economic value because of its delicious meat, richness in polyunsaturated fatty acids and protein and strong adaptability. Largemouth bass has become one of the main freshwater aquaculture species in the world, and the production of largemouth bass is increasing year by year, making an important contribution to the global supply of high-quality protein. At present, compound feed is mainly used in largemouth bass culture. However, due to the short breeding time of largemouth bass, incomplete related nutritional parameters and insufficient research on precise nutritional requirements in different growth stages and breeding modes, compound feed cannot accurately match the nutritional requirements of largemouth bass. Furthermore, there are still many problems in largemouth bass culture that need to be solved urgently, such as fish meal replacement, fish oil replacement, low-protein feed development, disease prevention and control, immune enhancement and research and development of new functional additives and aquaculture techniques. Therefore, it is urgent to carry out relevant research, so as to promote the healthy development of the largemouth bass culture industry and compound feed industry.

Dr. Hualiang Liang
Dr. Dongyu Huang
Dr. Ke Ji
Guest Editors

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Keywords

  • largemouth bass
  • nutritional requirement
  • nutrition metabolism
  • immune regulation
  • fishmeal substitution
  • functional additives
  • stress response
  • aquaculture technique

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Published Papers (1 paper)

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Research

15 pages, 747 KiB  
Article
Influence of Eucommia ulmoides Extract on the Growth, Glucose Metabolism, and Antioxidant Capacity of Largemouth Bass (Micropterus salmoides)
by Shengqi Zhao, Dongyu Huang, Mingchun Ren, Jiaze Gu and Hualiang Liang
Fishes 2025, 10(6), 269; https://doi.org/10.3390/fishes10060269 - 3 Jun 2025
Viewed by 285
Abstract
This study aimed to evaluate the impact of Eucommia ulmoides extract (EE) supplementation on the expression of genes related to glucose metabolism and antioxidant capacity of M. salmoides in response to different starch levels. In order to evaluate the effect of EE on [...] Read more.
This study aimed to evaluate the impact of Eucommia ulmoides extract (EE) supplementation on the expression of genes related to glucose metabolism and antioxidant capacity of M. salmoides in response to different starch levels. In order to evaluate the effect of EE on fish metabolism and especially to enhance the metabolism of M. salmoides towards glucose metabolism, especially in high and low starch formulations, we designed six experimental feed groups: PC (high-starch control), NC (low-starch control), and four groups supplemented with EE on the basis of PC, with EE concentrations of 0.05%, 0.10%, 0.15%, and 0.20%, respectively. Each feed was administered to fish with an average weight of 36.98 ± 0.08 g, which were cultured for seven weeks, and the water temperature was 31–33 °C. The results demonstrated that increasing the EE concentration in the feed significantly influenced fish growth without affecting the body composition. Regarding the antioxidant activity, the highest CAT (catalase) enzyme activity in the intestine was recorded in the 0.15% EE group. Additionally, the mRNA expression of the antioxidant gene keap1 (kelch-like ECH-associated protein1) increased with higher EE supplementation, and sod (superoxide dismutase) mRNA expression was significantly elevated in the 0.10% EE group compared to that in the PC group. A plasma biochemical analysis revealed a significant increase in the ALP (alkaline phosphatase) activity in the 0.05% EE group relative to the PC group, while the TG (triglycerides) levels progressively decreased as the EE levels increased. Furthermore, the GLU (glucose) levels were significantly reduced in both the EE-supplemented and NC groups compared to those in the PC group. Among the genes associated with glucose metabolism, both gk (glucokinase) and pepck (phosphoenol pyruvate carboxykinase) exhibited a pattern of initially decreasing, followed by an increase, as the EE levels rose, with the pepck (phosphoenol pyruvate carboxykinase) expression being lowest in the 0.10% EE group. In conclusion, appropriate EE supplementation in the diet may promote growth performance, enhance antioxidant capacity, and support the expression of genes related to glucose metabolism of M.salmoides in response to different starch levels. Full article
(This article belongs to the Special Issue Largemouth Bass Aquaculture)
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