陸上サーキュラータンクにおける幼生赤尾 (Hemibagrus wyckioides) の食事栄養レベルへの影響:代謝学と微生物分析からの洞察
Baohong Xu1,2, Haibin Hou1, Tiaoyi Xiao1,2
1Fisheries College, Hunan Agricultural University, Changsha 410128, Hunan, China.
Aquaculture nutrition
|September 5, 2025
まとめ
レッドテールキャットフィッシュ (Hemibagrus wyckioides) の最適な給餌量は,毎日体重の2%である. このレベルは抗酸化活性を増強し,脂質代謝を改善し,科学的な水産養殖のための腸内微生物群に肯定的な影響を及ぼします.
科学分野:
- 水産科学
- 魚の生理学
- 分子生物学
- オミックスの研究
背景:
- レッドテールキャットフィッシュ (Hemibagrus wyckioides) の養殖には最適化された養殖戦略が必要です.
- 効率的な農業を行うには 分子レベルとオミックスレベルの 影響を理解することが重要です
研究 の 目的:
- 陸上のタンクで最も有効なH. wyckioidesの餌レベルを決定する.
- H. wyckioidesに対する異なる給餌レベルによる分子およびオミックスレベルの影響を調査する.
主な方法:
- 56日間のH. wyckioidesの試食は,体重の2%,3%および4%で毎日実施された.
- 成長,生理学的パラメータ,遺伝子発現 (抗酸化物質,TGF,炎症,脂質代謝),腸内微生物群,および代謝学.
主要な成果:
- 2%の給餌群 (T2) は,より低い給餌変換率 (FCR) と改善した生理学的マーカー (アルブミン,SOD,ALP) を示した.
- T2は抗酸化物質と脂質代謝の遺伝子発現が強化され,腸内微生物群の好ましい変化 (Firmicutes/ Bacteroidetesの比率が低下) と,アミノ酸と脂質代謝経路の上昇が示された.
- 成長率 (SGR,WGR) はグループごとに似ていたが,T2は優れた分子および生理学的反応を示した.
結論:
- H. wyckioidesは,体重の2%の毎日の栄養レベルが最適で,よりよい生理的健康と分子反応を促進します.
- これらの発見は,H. wyckioidesの養殖方法を最適化するための科学的基盤を提供します.
- 餌のレベルは分子レベルとオミックレベルで魚の健康に大きく影響し,遺伝子発現と代謝経路に影響します.
関連する概念動画
Metabolism of Chemolithotrophs
1.3K
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
1.3K
Derivatives: Problem Solving
265
Temperature-Dependent Growth of Brook TroutThe growth of brook trout is closely influenced by water temperature. Experimental data demonstrate how trout weight changes over a 24-day period in response to varying water temperatures. At lower temperatures, such as 15.5 degrees Celsius, brook trout show significant weight gain. However, as the temperature increases, the amount of weight gained steadily decreases. At the highest temperature measured, 24.4 degrees Celsius, trout experience a net...
265
Microbes and Other Elemental Cycles
94
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
94
Marine Microbial Ecology
74
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
74
Deep Sea Microbial Ecology
55
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches...
55
Freshwater Microbial Ecology
66
Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic...
66


