Nutrient Digestibility and Growth Performance of Juvenile Penaeus vannamei Fed Diets Containing the Filamentous Fungus, Paecilomyces variotii, Produced From Corn Ethanol Thin Stillage

IF 4.6 2区农林科学 Q1 FISHERIES

Aquaculture Nutrition Pub Date : 2026-05-30 DOI:10.1155/anu/6937869

Alberto J. P. Nunes, Marcelo Pereira de Aguiar Toledo, Luana Quisini Vivan, Daniele Ferreira Marques, Caio G. D. Gomes

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引用次数: 0

Abstract

Fungal proteins are emerging ingredients having high potential for use in aquafeeds, yet digestibility and practical inclusion limits remain unclear for marine shrimp. This study evaluated a filamentous fungus (Paecilomyces variotii [PV]) produced from corn ethanol thin stillage as a replacement for salmon by-product meal (SLM) and poultry by-product meal (PBM) in diets for juvenile Penaeus vannamei. Five diets were formulated by replacing SLM and PBM with PV (0%–100% replacement; PV from 0% to 22.60% of the diet). After 78 days, shrimp performance was similar across treatments. Survival remained high (95.6 ± 3.4%). Weekly growth averaged 1.04 ± 0.08 g/week, with a gained yield of 1168 ± 92 g/m². Apparent feed intake (AFI) was 14.6 ± 0.6 g/shrimp, and feed conversion ratio (FCR) was 1.33 ± 0.09. Final body weight (BW) differed statistically among dietary treatments, with shrimp fed the diet containing 22.60% PV exhibiting a reduction (12.31 ± 1.89 g) compared with 0% PV (12.80 ± 2.02 g). In a digestibility assay (substitution method; 30% test ingredient), ingredient-level crude protein (CP) apparent digestibility coefficient (ADC) was higher for SLM (72.02 ± 1.96%) than for the PV (62.28 ± 0.48%). Amino acid (AA) digestibility was consistently lower for PV, with marked reductions in methionine (Met) (73.21 ± 1.72% vs. 85.71 ± 1.05%) and lysine (Lys) (86.23 ± 0.66% vs. 89.35 ± 1.10%) compared with SLM. Whole-body proximate composition at harvest was largely unaffected by dietary treatment, whereas nutrient and energy retention differed, with the highest protein retention observed at 75% replacement and reduced lipid and energy retention at 100% replacement. Overall, results indicated that PV can replace up to 75% of SLM and PBM, corresponding to 16.95% dietary inclusion, in diets for P. vannamei without impairing growth performance, whereas complete replacement (22.60% PV) reduces nutrient utilization efficiency and final BW.

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凡纳滨对虾幼虾饲粮中含有玉米乙醇稀渣生产丝状真菌的营养物质消化率和生长性能

真菌蛋白是一种新兴成分，在水产饲料中具有很高的应用潜力，但对海洋虾的消化率和实际包涵限制尚不清楚。本研究评估了一种由玉米乙醇稀沉淀物生产的丝状真菌（Paecilomyces variotii [PV]）作为凡纳滨对虾幼虾饲料中鲑鱼副产物粕（SLM）和家禽副产物粕（PBM）的替代品。用PV代替SLM和PBM配制5种饲粮（替代0% ~ 100%；PV为0% ~ 22.60%）。78天后，不同处理对虾的生产性能相似。生存率仍然很高（95.6±3.4%）。周平均生长量为1.04±0.08 g/周，产量为1168±92 g/m2。表观采食量（AFI）为14.6±0.6 g/只，饲料系数（FCR）为1.33±0.09。不同饲料处理对虾的最终体重（BW）差异有统计学意义，饲料中PV含量为22.60%的对虾比饲料中PV含量为0%的对虾（12.80±2.02 g）减少了（12.31±1.89 g）。在消化率试验中（替代法，30%试验成分），粗蛋白质表观消化系数（ADC） SLM（72.02±1.96%）高于PV（62.28±0.48%）。与SLM相比，PV的氨基酸（AA）消化率持续降低，蛋氨酸（Met）（73.21±1.72%）和赖氨酸（Lys）（86.23±0.66%）显著降低（分别为85.71±1.05%和89.35±1.10%）。收获时的全身近似组成在很大程度上不受饲料处理的影响，但营养和能量保留有所不同，75%替代时观察到最高的蛋白质保留，100%替代时观察到脂肪和能量保留减少。综上所示，PV在不影响凡纳滨沼虾生长性能的情况下，可替代高达75%的SLM和PBM，相当于16.95%的饲粮添加量，而完全替代（22.60% PV）会降低养分利用效率和最终体重。

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来源期刊

Aquaculture Nutrition 农林科学-渔业

CiteScore

7.20

自引率

8.60%

发文量

131

审稿时长

3 months

期刊介绍： Aquaculture Nutrition is published on a bimonthly basis, providing a global perspective on the nutrition of all cultivated aquatic animals. Topics range from extensive aquaculture to laboratory studies of nutritional biochemistry and physiology. The Journal specifically seeks to improve our understanding of the nutrition of aquacultured species through the provision of an international forum for the presentation of reviews and original research papers. Aquaculture Nutrition publishes papers which strive to: increase basic knowledge of the nutrition of aquacultured species and elevate the standards of published aquaculture nutrition research. improve understanding of the relationships between nutrition and the environmental impact of aquaculture. increase understanding of the relationships between nutrition and processing, product quality, and the consumer. help aquaculturalists improve their management and understanding of the complex discipline of nutrition. help the aquaculture feed industry by providing a focus for relevant information, techniques, tools and concepts.