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https://www.readbyqxmd.com/read/28944974/granulomatous-enteritis-in-rainbow-trout-oncorhynchus-mykiss-associated-with-soya-bean-meal-regardless-of-water-dissolved-oxygen-level
#1
P Mosberian-Tanha, T Landsverk, C M Press, L T Mydland, J W Schrama, M Øverland
This study investigated morphological changes associated with soya bean meal-induced enteritis (SBMIE) in distal intestine (DI) of rainbow trout (Oncorhynchus mykiss) fed a soya bean meal (SBM)-based diet and exposed to normoxia or hypoxia created by optimal and low water flow rates, respectively. A 28-day adaption period was followed by a 42-day challenge period where 600 fish were subjected to dietary challenge and/or hypoxia. Twelve tanks each containing 50 juvenile trout were assigned randomly in triplicate to each treatment...
September 25, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28941714/intravenous-injection-of-unfunctionalized-carbon-based-nanomaterials-confirms-the-minimal-toxicity-observed-in-aqueous-and-dietary-exposures-in-juvenile-rainbow-trout-oncorhynchus-mykiss
#2
David Boyle, Paul A Sutton, Richard D Handy, Theodore B Henry
Numerous ecotoxicology studies of carbon-based nanomaterials (CNMs) have been conducted in fishes; however, different approaches have been used to make CNM dispersions and dose tanks for aqueous exposures, and to prepare food containing CNMs for dietary studies. This diversity of experimental methods has led to conflicting results and difficulties in comparing studies. The objective of the present study was to evaluate intravenous injection of unfunctionalized CNMs in rainbow trout (Oncorhynchus mykiss), as a means of delivering a known internal dose, on tissue biochemistry and histopathological lesions; then, subsequently, to compare the results with our previous work on aqueous and dietary exposures of rainbow trout to CNMs...
September 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28933632/influence-of-light-and-food-on-the-circadian-clock-in-liver-of-rainbow-trout-oncorhynchus-mykiss
#3
Juan Hernández-Pérez, Jesús M Míguez, Fatemeh Naderi, José L Soengas, Marcos A López-Patiño
Several reports support the existence of multiple peripheral oscillators in fish, which may be able to modulate the rhythmic functions developed by those tissues hosting them. Thus, a circadian oscillator has been proposed to be located within fish liver. In this vertebrate group, the role played by the circadian system in regulating metabolic processes in liver is mostly unknown. We, therefore investigated the liver of rainbow trout (Oncorhynchus mykiss) as a potential element participating in the regulation of circadian rhythms in fish by hosting a functional circadian oscillator...
September 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28931545/regulation-of-genes-related-to-cholesterol-metabolism-in-rainbow-trout-oncorhynchus-mykiss-fed-plant-based-diet
#4
Tengfei Zhu, Genevieve Corraze, Elisabeth Plagnes-Juan, Edwige Quillet, Mathilde Dupont-Nivet, Sandrine Skiba-Cassy
Compared to fishmeal and fish oil, plant ingredients differ not only in the protein content, amino acid and fatty acid profiles but are also devoid of cholesterol, the major component of cell membrane and precursor of several bioactive compounds. Based on these nutritional characteristics, plant-based diets can affect fish physiology and cholesterol metabolism. In order to investigate the mechanisms underlying cholesterol homeostasis, rainbow trout were fed from 1g body weight during six months with a totally plant-based diet (V), a marine diet (M) and a marine restricted diet (MR) with feed intake adjusted to that of the V group...
September 20, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28929460/trace-metal-levels-in-rainbow-trout-oncorhynchus-mykiss-cultured-in-net-cages-in-a-reservoir-and-evaluation-of-human-health-risks-from-consumption
#5
Memet Varol, Gülderen Kurt Kaya, Sumru Anık Alp, Muhammet Raşit Sünbül
Although fish consumption has positive health effects, metals accumulated in fish can cause human health risks. In this study, the levels of ten metals in rainbow trout (Oncorhynchus mykiss) farmed in the Keban Dam Reservoir, which has the biggest rainbow trout production capacity in Turkey, were determined and compared with the maximum permissible levels (MPLs). Also, human health risks associated with rainbow trout consumption were assessed. The metal concentrations in rainbow trout were found below the MPLs...
September 19, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28924252/comprehensive-analysis-of-lncrnas-and-mrnas-in-skeletal-muscle-of-rainbow-trout-oncorhynchus-mykiss-exposed-to-estradiol
#6
Jian Wang, Prasanthi P Koganti, Jianbo Yao, Shuo Wei, Beth Cleveland
Estradiol (E2) is a steroid hormone that negatively affects muscle growth in rainbow trout (Oncorhynchus mykiss), but the mechanisms directing with this response are not fully understood. To better characterize the effects of E2 in muscle, we identified differentially regulated mRNAs and lncRNAs in juvenile rainbow trout exposed to E2. Here, we performed next-generation RNA sequencing and comprehensive bioinformatics analyses to characterize the transcriptome profiles, including mRNAs and long noncoding RNAs (lncRNAs), in skeletal muscle of rainbow trout injected with E2...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28919473/atorvastatin-alters-gene-expression-and-cholesterol-synthesis-in-primary-rainbow-trout-oncorhynchus-mykiss-hepatocytes
#7
Aziz A Al-Habsi, Andrey Massarsky, Thomas W Moon
The liver is a key metabolic organ contributing significantly to both lipid and cholesterol homeostasis in vertebrates. This study examines whether the human pharmaceutical atorvastatin (ATV), which is designed to lower cholesterol biosynthesis, could disrupt lipid dynamics in fish. The study investigates the effects of ATV at a physiologically relevant exposure regimen (concentration and duration) on gene transcripts and the biosynthesis of cholesterol and other lipid and non-lipid molecules in primary rainbow trout hepatocytes...
September 14, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28917946/cellular-uptake-and-intracellular-localization-of-poly-acrylic-acid-nanoparticles-in-a-rainbow-trout-oncorhynchus-mykiss-gill-epithelial-cell-line-rtgill-w1
#8
Lindsey C Felix, Van A Ortega, Greg G Goss
The ever-growing production of engineered nanoparticles (NPs) for use in many agricultural, commercial, consumer, and industrial applications will lead to their accidental or intentional release into the environment. Potential routes of environmental exposure include manufacturing or transport spills, disposal of NP-containing products down the drain and/or in landfills, as well as direct usage on agricultural land. Therefore, NPs will inevitably contaminate aquatic environments and interact with resident organisms...
September 7, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28915373/bioaccumulation-of-metals-in-juvenile-rainbow-trout-oncorhynchus-mykiss-via-dietary-exposure-to-blue-mussels
#9
Gillian McEneff, Brian Quinn, Matthew Bennion, Sorcha Dolan, Kathleen O'Rourke, Liam Morrison
The potential for metals to bioaccumulate in aquatic species, such as fish, via trophic level transfer was investigated. An in vivo experiment was set up in a flow-through system in which juvenile rainbow trout were fed blue mussels collected from a Class A pristine site and an effluent-impacted river estuary, over a period of 28 days. Selected elements (As, Cd, Cr, Co, Cu, Fe, Pb, Mn, Mo, Ni, Se, Sn, V, Zn) were determined in the mussels and fish tissues (muscle and skin) collected at 0, 14 and 28 days. This study reveals the occurrence of metals in mussels sampled in the Irish marine environment and highlights the bioaccumulation potential of metals in fish tissues via trophic transfer...
August 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28914447/are-brown-trout-salmo-trutta-fario-and-rainbow-trout-oncorhynchus-mykiss-two-of-a-kind-a-comparative-study-of-salmonids-to-temperature-influenced-tetracapsuloides-bryosalmonae-infection
#10
C Bailey, H Schmidt-Posthaus, H Segner, T Wahli, N Strepparava
Proliferative kidney disease (PKD) of salmonids caused by Tetracapsuloides bryosalmonae causes high mortalities of wild brown trout (Salmo trutta fario) and farmed rainbow trout (Oncorhynchus mykiss) at elevated water temperatures. Here the aim was to compare the temperature-dependent modulation of T. bryosalmonae in the two salmonid host species, which display different temperature optima. We used a novel experimental set-up in which we exposed brown trout and rainbow trout to an identical quantified low concentration of T...
September 15, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28912308/draft-genome-sequence-of-epilithonimonas-sp-fp211-j200-isolated-from-an-outbreak-episode-on-a-rainbow-trout-oncorhynchus-mykiss-farm
#11
Manuel Ayala, Cristopher Segovia, Rodrigo Rojas, Claudio Miranda, Javier Santander
Here, we report the draft genome sequence of Epilithonimonas sp. FP211-J200, isolated from rainbow trout head kidney cells. The size of the genome is 4,110,772 bp, with a G+C content of 37.1%. The Epilithonimonas sp. FP211-J200 genome has genes related to tetracycline and β-lactam resistance. This is the first reported Epilithonimonas species genome isolated from a fish host.
September 14, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28886189/phylogeny-of-the-infectious-hematopoietic-necrosis-virus-in-european-aquaculture
#12
Michael Cieslak, Thomas Wahli, Nicolas Diserens, Olga L M Haenen, Heike Schütze
Infectious hematopoietic necrosis (IHN)-a highly lethal infectious salmonid disease-has caused substantial economic losses in the European production of rainbow trout (Oncorhynchus mykiss) since the late 1980s. The causal agent of IHN is the IHN virus (IHNV) introduced from overseas. However, until today, its phylogeographic spread in Europe remains poorly understood. We therefore sought to elucidate this unresolved topic by using the largest ever compiled dataset of European IHNV isolates (E isolates) (193 GenBank E isolates and 100 isolates from this study) for the complete glycoprotein (G) gene sequence...
2017: PloS One
https://www.readbyqxmd.com/read/28882798/modulatory-in-vitro-effect-of-stress-hormones-on-the-cytokine-response-of-rainbow-trout-and-gilthead-sea-bream-head-kidney-stimulated-with-vibrio-anguillarum-bacterin
#13
Ali Reza Khansari, David Parra, Felipe E Reyes-López, Lluís Tort
In fish, the stress response and their consequences in the immune system have been widely described. Recently, a differential cytokine regulation between rainbow trout (Oncorhynchus mykiss) and gilthead sea bream (Sparus aurata) was reported after treatment with stress hormones together with their receptor antagonists. Nevertheless, there is no evidence of whether antagonists for stress hormone receptors may influence the interaction between hormones and cytokines after bacterial administration. Thus, the aim of our study was to evaluate the cytokine expression in the presence of stress hormones (cortisol, ACTH, adrenaline), hormone receptor antagonists and inactivated Vibrio anguillarum bacterin in rainbow trout and gilthead sea bream head kidney primary cell culture (HKPCC)...
September 4, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28865209/impact-of-production-technology-on-morphological-lesions-in-the-gills-of-commercial-rainbow-trout-oncorhynchus-mykiss-walbaum-1792
#14
E Strzyżewska-Worotyńska, J Szarek, I Babińska, D Gulda
The most popular rainbow trout (Oncorhynchus mykiss, Walbaum 1792) production technologies include both an extensive method with the flow through system (FTS) and an intensive method with the recirculating aquaculture system (RAS). Their impact on the fish was evaluated with a morphological assessment of the gills, as these are organs susceptible to environmental changes. Trout of 350 - 500 g body mass were caught for trial in spring and autumn, with 36 fish originating from 3 fish farms with the FTS system and an equal number from 3 RAS fish farms (n = 6)...
March 1, 2017: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28861641/medicinal-plant-extracts-modulate-respiratory-burst-and-proliferation-activity-of-rainbow-trout-oncorhynchus-mykiss-leukocytes
#15
Chiara Bulfon, Marco Galeotti, Donatella Volpatti
The present study was designed to investigate the immunomodulatory effects of Aloe vera, Curcuma longa, Echinacea purpurea, Lavandula officinalis, Origanum vulgare, Panax ginseng, and Rheum officinale extracts on leukocytes purified from rainbow trout (Oncorhynchus mykiss) head kidney. The cells were cultured in a medium containing increasing doses of extracts; afterwards, they were tested for reactive oxygen species production after stimulation with phorbol myristate acetate (PMA) and proliferation in the presence or absence of phytohemagglutinin from Phaseolus vulgaris (PHA-P)...
September 1, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28859525/influence-of-essential-oils-in-diet-and-life-stage-on-gut-microbiota-and-fillet-quality-of-rainbow-trout-oncorhynchus-mykiss
#16
Florencia Ceppa, Filippo Faccenda, Carlotta De Filippo, Davide Albanese, Massimo Pindo, Roberta Martelli, Paola Marconi, Fernando Lunelli, Francesca Fava, Giuliana Parisi
Developing fish farming to meet the demands of food security and sustainability in the 21st century will require new farming systems and improved feeds. Diet and microbe interactions in the gut is an important variable with the potential to make a significant impact on future fish farming diets and production systems. It was monitored the gut microbiota of farmed rainbow trout using 16S rRNA profiling over 51 weeks during standard rearing conditions and feeding diet with supplementation of an essential oils (MixOil) mixture from plants (at a concentration in diet of 200 mg/kg)...
August 31, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/28855413/predation-metabolic-priming-and-early-life-history-rearing-environment-affect-the-swimming-capabilities-of-growth-hormone-transgenic-rainbow-trout
#17
Glenn T Crossin, Robert H Devlin
The period of first feeding, when young salmonid fishes emerge from natal stream beds, is one fraught with predation risk. Experiments conducted in semi-natural stream mesocosms have shown that growth hormone transgenic salmonids are at greater risk of predation than their non-transgenic siblings, due partly to the higher metabolic demands associated with transgenesis, which force risky foraging behaviours. This raises questions as to whether there are differences in the swim-performance of transgenic and non-transgenic fishes surviving predation experiments...
August 2017: Biology Letters
https://www.readbyqxmd.com/read/28844801/microbial-chemical-textural-and-sensory-properties-of-coated-rainbow-trout-by-chitosan-combined-with-pomegranate-peel-extract-during-frozen-storage
#18
Enayat Berizi, Saeid Hosseinzadeh, Seyed Shahram Shekarforoush, Giampiero Barbieri
The current study was aimed to investigate the combined effects of chitosan (Ch) and pomegranate peel extract (PPE) on the overall quality of rainbow trout (Oncorhynchus mykiss) during the frozen storage. Fresh gutted fishes were dipped for 60s either in sterile distilled water (Control) or in chitosan combined with 0 (Ch), 1% (Ch+PPE1), 2% (Ch+PPE2), or 4% (Ch+PPE4) (w/v) PPE. Microbial, chemical, textural and sensory properties of the samples were intermittently checked during six months. At the end of storage, the highest and lowest values of psychrophilic, lactic acid bacteria and mold counts in the control and Ch+PPE4 groups were respectively, 5...
August 24, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28830712/effects-of-nanostructured-zeolite-and-aflatoxin-b1-in-growth-performance-immune-parameters-and-pathological-conditions-of-rainbow-trout-oncorhynchus-mykiss
#19
S Alinezhad, M Faridi, B Falahatkar, R Nabizadeh, D Davoodi
The reduction of Aflatoxin B1 (AF) in juvenile rainbow trout (Oncorhynchus mykiss) diet was analyzed after supplementing Nanostructured Zeolite (NZ) in a 56-day experiment. Two hundred and seventy juveniles with an average weight of 23 ± 3.7 g were placed in 6 different groups of C (control as a basal diet), NZ0.5 (basal diet + 0.5% NZ), NZ1 (basal diet + 1% NZ), AF5 (basal diet + 5 mg AFB1), AF5 NZ0.5 (basal diet + 5 mg AFB1 + 0.5% NZ), AF5 NZ1 (basal diet + 5 mg AFB1 + 1% NZ) with three replications and were fed four times a day based on their satiation...
August 19, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28830711/changes-in-growth-blood-immune-parameters-and-expression-of-immune-related-genes-in-rainbow-trout-oncorhynchus-mykiss-in-response-to-diet-supplemented-with-ducrosia-anethifolia-essential-oil
#20
Arya Vazirzadeh, Fatemeh Dehghan, Roya Kazemeini
An 8- week feeding trial was conducted to investigate the effects of Ducrosia anethifolia essential oil on growth, blood immune parameters and immune related genes expression in juvenile rainbow trout (Oncorhynchus mykiss). Fish were allocated into 4 groups and fed on diet containing different levels of essential oil (0, 0.001, 0.01 and 0.1%) to apparent satiation in 30 min 3 times daily. Growth and immunological parameters were measured every ten days and tissue samples were taken from kidney and spleen on days 10, 30 and 50 to study the expression of IL-1β and TNF-α...
August 19, 2017: Fish & Shellfish Immunology
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