Gut-protective effects of dietary niacin in juvenile turbot (Scophthalmus maximus L.) fed a high-lipid diet: modulation of mucosal immune response, barrier function, and gut microbiota.

This study investigated the protective effects of dietary niacin on the intestinal health of juvenile turbot fed a high-lipid diet (HLD). Two isonitrogenous and isolipidic diets were formulated, including a HLD without niacin addition (HL0) and a HLD supplemented with 80 mg/kg niacin (HL80). Turbot (approximately 13.

Methanotroph () bacteria meal, influences the intestinal microbiome, and improves intestinal barrier function and immunity in hybrid grouper ( ♀ × ♂).

The hybrid grouper () is an important aquaculture marine species in China. The current study was designed to test the effects of methanotroph () bacteria meal (MBM) on hybrid grouper growth and intestinal health outcomes. Five iso-nitrogenous and iso-lipidic diets were formulated, comprising a control diet (MBM0) with 400 g/kg fish meal (FM) as the main protein source, and four experimental diets, in which FM was replaced at 5% (MBM2), 10% (MBM4), 20% (MBM8) and 30% (MBM12) with 20, 40, 80 and 120 g/kg of MBM, respectively.

A new insight on the application of phytosterols in the aquatic feed: Improve the growth and intestinal health of largemouth bass (Micropterus salmoides) fed the high starch diet.

This study investigated the effects of phytosterols (PS) supplementation in high-starch diets on growth, antioxidant capacity, muscle/intestinal morphology, and gut microbiota in largemouth bass (Micropterus salmoides). A total of 960 fish (11.14 ± 0.

Effects of dietary citrus pulp on glucolipid metabolism of largemouth bass (Micropterus salmoides).

Background: Citrus pulp (CP) is rich in pectin, which exhibits anti-inflammatory, antioxidant, and hypolipidemic properties. Despite these advantages, the application of CP in aquafeed remains limited. This study investigated the effects of dietary CP inclusion on the glucolipid metabolism of largemouth bass (Micropterus salmoides).

Optimal dietary phospholipid requirement for juvenile leopard coral grouper (Plectropomus leopardus).

The highly sought-after carnivorous leopard coral grouper (Plectropomus leopardus) in seawater is valued for its vivid coloration and nutritional richness. Dietary phospholipid supplementation has been demonstrated to enhance physiological health in fish, but these effects are species-dependent. Despite its popularity, there is scarce study regarding the effects of dietary phospholipids on P.

Dietary Tryptophan Requirement of Juvenile Hybrid Grouper (♀ ♂).

A 10-week feeding study was conducted to examine the effects of dietary tryptophan (Trp) levels on the growth performance and protein metabolism of hybrid grouper (♀ × ♂) with the aim of determining the optimal Trp requirement. Six isonitrogenous and isolipidic experimental diets were formulated, containing varying levels of Trp (0.26%, 0.

Effects of Malondialdehyde on Growth Performance, Gastrointestinal Health, and Muscle Quality of Striped Catfish ().

Malondialdehyde (MDA) is a reactive carbonyl compound produced through lipid peroxidation during feed storage, which poses a significant threat to fish health. This study aimed to evaluate the effects of dietary MDA on the growth rate, gastrointestinal health, and muscle quality of striped catfish (). A basal diet (M0) containing 34% crude protein and 10.

Impact of arabinoxylan-enriched diets on the intestinal chemical barrier and microbiota composition in rainbow trout ().

Introduction: This study was conducted to evaluate the effects of dietary AX inclusion on the chemical barrier, antioxidant function and intestinal microbiome of rainbow trout.

Methods: Five isoproteic and isolipidic experimental diets were formulated to contain 0.03% arabinoxylanase, as well as 0%, 2.

Dietary Malondialdehyde Impair Intestinal Health and Fillet Quality of Hybrid Grouper (♀ ♂).

Aquafeed kept at elevated temperatures and humidity can result in malondialdehyde (MDA) formation, adversely affecting aquafeed quality and triggering negative reactions in fish. To investigate the detrimental effects of dietary MDA on fish, six experimental diets with varying MDA levels (ranging from 0.03 to 17.

Effects of Replacing Soybean Meal with Sunflower Meal or Fermented Sunflower Meal on the Growth Performance, Intestinal Microbiota, and Intestinal Health of Tilapia (GIFT, ).

A 9-week feeding trial was conducted to evaluate the effects of replacing soybean meal (SBM) with sunflower meal (SM) or fermented sunflower meal (FSM) on the growth performance, intestinal microbiota, and intestinal health of genetically improved farmed tilapia () (initial weight 6.55 ± 0.01 g).

Effects of Different Astaxanthin Sources on Fillet Coloration and Energy Deposition in Rainbow Trout ().

A 9-week feeding trial was conducted to investigate the effects of different dietary sources of astaxanthin on fillet coloration, texture, and nutrient composition in rainbow trout (). Eight diets were formulated to contain 0, 25, 50, 75, 100, and 125 mg/kg astaxanthin from wall-broken (WBHPA), 100 mg/kg astaxanthin from wall-unbroken (WUHPA), or chemically synthesized astaxanthin (CSA). Each diet was fed to triplicate groups of rainbow trout (mean initial weight of 561 g) twice daily (07:00 and 17:00) to apparent satiation for 9 weeks.

Effects of Replacing Fish Meal with Rubber Seed Cake on Growth, Digestive, Antioxidant and Protein Metabolism of Juvenile Asian Red-Tailed Catfish ().

An 8-week feeding trial was conducted to assess the impact of replacing fish meal (FM) with rubber seed cake (RSC) on growth performance, digestive enzyme activity of the gut, antioxidant capacity and protein metabolism-related parameters of plasma and liver in juvenile Asian red-tailed catfish () with an average body weight of 3.21 g. Four isonitrogenous (41.

Effects of dietary astaxanthin supplementation on growth performance, antioxidant status, immune response, and intestinal health of rainbow trout ().

A feeding trial was conducted to assess the impacts of dietary astaxanthin from wall-broken (WBHPA) on the growth performance, antioxidant status, immune response, and intestinal health of rainbow trout (). Six experimental diets were formulated with various concentrations of WBHPA, ranging from 0 to 8.4 g/kg (containing 0 to 125 mg/kg astaxanthin).

Effects of replacing wheat bran with palm kernel cake or fermented palm kernel cake on the growth performance, intestinal microbiota and intestinal health of tilapia (GIFT, ).

A nine-week feeding trial was conducted to evaluate the effects of replacing wheat bran (WB) with palm kernel cake (PKC) or fermented palm kernel cake (FPKC) on the growth performance, intestinal microbiota and intestinal health of genetically improved farmed tilapia (GIFT, ) (initial weight 7.00 ± 0.01 g).

High replacement of soybean meal by different types of rapeseed meal is detrimental to rainbow trout () growth, antioxidant capacity, non-specific immunity and tolerance.

A 12-week feeding trial was conducted to evaluate the effects of replacing soybean meal with different types of rapeseed meal (RSM; Chinese 95-type (oil press model) rapeseed meal [C95RM], Chinese 200-type rapeseed meal [C200RM], cold pressed rapeseed cake [CPRC], Indian rapeseed meal [IRM] and Canadian rapeseed meal [CRM]) on growth, antioxidant capacity, non-specific immunity and infection tolerance in 990 fingering (average weight 12.77 ± 0.01 g) rainbow trout ().

Effects of dietary citrus pulp level on the growth and intestinal health of largemouth bass (Micropterus salmoides).

Background: Citrus pulp (CP) is rich in pectin, and studies have shown that pectin possesses antioxidant, anti-inflammatory, and gut microbiota-regulating properties. However, the application of CP in aquafeed is limited. In this study, the effect of dietary inclusion of CP on the intestinal health of largemouth bass (Micropterus salmoides) was investigated.

Dietary Malondialdehyde Damage to the Growth Performance and Digestive Function of Hybrid Grouper (♀ ♂).

Malondialdehyde (MDA) is the dominant component of lipid peroxidation products. Improper storage and transportation can elevate the lipid deterioration MDA content of diets to values that are unsafe for aquatic animals and even hazardous to human health. The study aimed to investigate the effect of dietary MDA on growth performance and digestive function of hybrid grouper (♀ ♂).

Excessive dietary soluble arabinoxylan impairs the intestinal physical and immunological barriers via activating MAPK/NF-κB signaling pathway in rainbow trout (Oncorhynchus mykiss).

Arabinoxylan (AX) has been deemed as an antinutritional factor, but limited information has addressed the effects of dietary AX on intestinal health of fish. The present study investigated the effects of dietary AX on intestinal mucosal physical and immunological barriers of rainbow trout (Oncorhynchus mykiss). Five isoproteic and isolipidic experimental diets (AXE, AX0, AX2.

The effects of sodium butyrate (NaB) combination with soy saponin dietary supplementation on the growth parameters, intestinal performance and immune-related genes expression of hybrid grouper (Epinephelus fuscoguttatus♀ × E. lanceolatus♂).

Soy saponins are generally known to have negative effects on growth and the intestines of aquatic animals, and appropriate levels of sodium butyrate (NaB) may provide some mitigating effects. We investigated the effects of low and high levels of soy saponin and the protective effects of NaB (based on high level of soy saponin) on growth, serum cytokines, distal intestinal histopathology, and inflammation in hybrid grouper (Epinephelus fuscoguttatus ♀ × E. lanceolatus ♂).

Potential mechanisms of different methylation degrees of pectin driving intestinal microbiota and their metabolites to modulate intestinal health of Micropterus salmoides.

Four diets containing 8 % cellulose, low methyl-esterified pectin (LMP), high methyl-esterified pectin (HMP) and MMP (half LMP and half HMP) were designed to evaluate the potential mechanisms by which different esterification degrees of pectin drive intestinal microbiota and their metabolites modulating the intestinal health of Micropterus salmoides. The results showed that both dietary LMP and HMP consistently upregulated intestinal zonula occludens protein 1 (Zo-1), Caludin-1, and Caludin-4, and downregulated intestinal tumor necrosis factor-alpha (TNF-α), interleukin-8 (IL-8), and interleukin-1 beta (IL-1β) gene expression (P < 0.05).

Effects of Dietary Lysine Level on Growth Performance and Protein Metabolism in Juvenile Leopard Coral Grouper ().

An 8-week feeding trial was conducted to evaluate the effects of dietary lysine level on growth performance and protein metabolism of juvenile leopard coral grouper () and thereby obtained the optimal dietary lysine requirement of . Six isoproteic and isolipidic experimental diets were formulated to contain 1.10%, 1.

Evaluation of Cottonseed Meal as an Alternative to Fish Meal in Diet for Juvenile Asian Red-Tailed Catfish .

A 10-week trial was performed to investigate the effects of replacing fishmeal with cottonseed meal (CSM) on the growth rate, protein metabolism, and antioxidant response of Asian red-tailed catfish . Five isonitrogenous and isocaloric diets (C0, C8.5, C17.

Dietary Histamine Impairs the Digestive Physiology Function and Muscle Quality of Hybrid Grouper (♀ × ♂).

An 8-week feeding experiment was conducted to investigate the effect of dietary histamine on growth performance, digestive physiology function and muscle quality in a hybrid grouper (♀ × ♂). Seven isoproteic (50%) and isolipidic (11%) diets were prepared with various histamine inclusion levels of 0, 30, 60, 120, 240, 480 and 960 mg/kg in diets (actual contents were 72.33, 99.

Soybean protein concentrate causes enteritis in juvenile pearl gentian groupers ( × ).

Due to diminishing fish meal (FM) supplies, superb protein (PRO) sources are needed for aquaculture, such as soy-based PRO. However, these can cause enteritis and even intestinal injury in fish when used at high proportions in feed. This research examines the effects of substituting soybean protein concentrate (SPC) for FM on the growth performance and intestinal balance of pearl gentian groupers and investigates the mechanism of SPC-induced enteritis.