9,609 results match your criteria trout oncorhynchus


Sub-Chronic Exposure to Environmental Concentrations of Chlorpyrifos Affect Swimming Activity of Rainbow Trout Larvae.

Environ Toxicol Chem 2021 Jul 30. Epub 2021 Jul 30.

University of Bordeaux, UMR5805 CNRS University of Bordeaux EPHE, Allée Geoffoy Saint-Hilaire, 33600, Pessac, France.

Chlorpyrifos (CPF), one organophosphorus pesticide, can be found in aquatic ecosystems at concentrations of up to several hundred ng/L because of water runoff from treated crops. While some previous studies have shown that low concentrations of CPF may have adverse effects on aquatic species, comparatively little is known about its effect on fish embryos and larvae. To investigate the developmental effects of CPF, rainbow trout (Oncorhynchus mykiss) eyed-stage embryos were exposed in semi-static conditions to 0. Read More

View Article and Full-Text PDF

Expression and characterization of rainbow trout Oncorhynchus mykiss recombinant myoglobin.

Fish Physiol Biochem 2021 Jul 30. Epub 2021 Jul 30.

Graduate School of Agriculture, Tohoku University, Aramaki, Aoba, Sendai, 980-8572, Japan.

Recombinant expression system was established for rainbow trout myoglobin (Mb) considering its unique primary structure of having one unusual deletion and two cysteine residues in contrast to the other fish Mbs. The obtained recombinant Mb without His-tag showed non-cooperative thermal denaturation profile. The presence of free cysteine residue(s) in rainbow trout Mb was demonstrated by reacting with a sulfhydryl agent, 4, 4´-dithiodipyridine, which ultimately resulted in the oxidation of Mb with characteristic changes in visible absorption spectra. Read More

View Article and Full-Text PDF

Normoxic limitation of maximal oxygen consumption rate, aerobic scope and cardiac performance in exhaustively exercised rainbow trout (Oncorhynchus mykiss).

J Exp Biol 2021 Aug 29;224(15). Epub 2021 Jul 29.

Department of Biological and Environmental Sciences, University of Gothenburg, PO Box 463, 405 30 Gothenburg, Sweden.

In fish, maximum O2 consumption rate (ṀO2,max) and aerobic scope can be expanded following exhaustive exercise in hyperoxia; however, the mechanisms explaining this are yet to be identified. Here, in exhaustively exercised rainbow trout (Oncorhynchus mykiss), we assessed the influence of hyperoxia on ṀO2,max, aerobic scope, cardiac function and blood parameters to address this knowledge gap. Relative to normoxia, ṀO2,max was 33% higher under hyperoxia, and this drove a similar increase in aerobic scope. Read More

View Article and Full-Text PDF

Combined polystyrene microplastics and chlorpyrifos decrease levels of nutritional parameters in muscle of rainbow trout (Oncorhynchus mykiss).

Environ Sci Pollut Res Int 2021 Jul 28. Epub 2021 Jul 28.

State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China.

Microplastic (MP) is a major contaminant in the aquatic environment. In addition to the physical threats posed by microplastic ingestion, their potential as a vector for the transport of hydrophobic pollutants is required to be adequately addressed. This study examined the effects of polystyrene microplastics individually or combined with chlorpyrifos insecticide on nutritional parameters in muscle of rainbow trout (Onchorhynchus mykiss). Read More

View Article and Full-Text PDF

A fast HRMA tool to authenticate eight salmonid species in commercial food products.

Food Chem Toxicol 2021 Jul 23:112440. Epub 2021 Jul 23.

LAQV-REQUIMTE, Faculty of Pharmacy, University of Porto, R. Jorge de Viterbo Ferreira 228, 4050-313, Porto, Portugal. Electronic address:

Atlantic and Pacific salmon are frequently consumed species with very different economic values: farmed Atlantic salmon is cheaper than wild-caught Pacific salmons. Species replacements occur with the high valued Pacific species (Oncorhynchus keta, O. gorbuscha, O. Read More

View Article and Full-Text PDF

Characterization of a Leptin Receptor Paralog and Its Response to Fasting in Rainbow Trout ().

Int J Mol Sci 2021 Jul 20;22(14). Epub 2021 Jul 20.

National Center for Cool and Cold Water Aquaculture, Agricultural Research Service, United States Department of Agriculture, Kearneysville, WV 25430, USA.

Leptin is a cytokine that regulates appetite and energy expenditure, where in fishes it is primarily produced in the liver and acts to mobilize carbohydrates. Most fishes have only one leptin receptor (LepR/LepRA1), however, paralogs have recently been documented in a few species. Here we reveal a second leptin receptor (LepRA2) in rainbow trout that is 77% similar to trout LepRA1. Read More

View Article and Full-Text PDF

sp. nov. isolated from internal organs of apparently healthy rainbow trout.

Int J Syst Evol Microbiol 2021 Jul;71(7)

Department of Aquatic Animal Diseases, Faculty of Veterinary Medicine, Erciyes University, 38280, Kayseri, Turkey.

Two yellow-pigmented isolates, F-60 and F-392, were isolated from the internal organs of an apparently healthy rainbow trout (). The strains were identified as members of the genus based on the results of 16S rRNA gene sequence analysis. Strains F-60 and F-392 had the highest 16S rRNA gene sequence identity level of 97. Read More

View Article and Full-Text PDF

GAS1: A New β-Glucan Immunostimulant Candidate to Increase Rainbow Trout () Resistance to Bacterial Infections With .

Front Immunol 2021 6;12:693613. Epub 2021 Jul 6.

Research Unit in Environmental and Evolutionary Biology (URBE), Research Institute of Life, Earth & Environment, University of Namur (UNamur), Namur, Belgium.

β-glucans are prebiotic and/or food additives used by the aquaculture industry to enhance the immune response of fish. Their efficiency may vary according to their origin and structure. In this study, the immunostimulant effects of two β-glucan types extracted from wild-type baker's yeast () and its null-mutant Gas1 were investigated. Read More

View Article and Full-Text PDF

Assessing the Toxicity of 17α-Ethinylestradiol in Rainbow Trout Using a 4-Day Transcriptomics Benchmark Dose (BMD) Embryo Assay.

Environ Sci Technol 2021 Jul 22. Epub 2021 Jul 22.

Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5B3.

There is an urgent demand for more efficient and ethical approaches in ecological risk assessment. Using 17α-ethinylestradiol (EE2) as a model compound, this study established an embryo benchmark dose (BMD) assay for rainbow trout (RBT; ) to derive transcriptomic points-of-departure (tPODs) as an alternative to live-animal tests. Embryos were exposed to graded concentrations of EE2 (measured: 0, 1. Read More

View Article and Full-Text PDF

Bioaccumulation of dodecamethylcyclohexasiloxane (D6) in fish.

Chemosphere 2021 Oct 21;281:130948. Epub 2021 May 21.

School of Resource and Environmental Management, Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada. Electronic address:

To investigate the bioaccumulation behavior of dodecamethylcyclohexasiloxane (D6, CAS number: 540-97-6) in fish, an OECD-305 style dietary bioaccumulation study of D6 in rainbow trout was conducted in the presence of non-metabolizable reference chemicals. The dietary uptake absorption efficiency of D6 was 14 (3 SE) % and lower than that of the reference chemicals which ranged between 22 (2 SE) to 60 (8 SE) %. The concentration of D6 in the body of the fish showed a rapid 40% drop during the first day of the depuration phase, followed by a slower decline during the remainder of the depuration period. Read More

View Article and Full-Text PDF
October 2021

In vivo experiments provide evidence that Flavobacterium psychrophilum strains belonging to multilocus sequence typing clonal complex ST191 are virulent to Rainbow Trout Oncorhynchus mykiss.

J Aquat Anim Health 2021 Jul 20. Epub 2021 Jul 20.

Department of Fisheries and Wildlife, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI, 48824, USA.

Flavobacterium psychrophilum, the causative agent of bacterial coldwater disease (BCWD), causes significant economic losses worldwide, particularly in farmed Rainbow Trout Oncorhynchus mykiss. Over the last decade, multilocus sequence typing (MLST) has revealed >30 clonal complexes (CCs) globally, comprised of >320 F. psychrophilum sequence types (STs). Read More

View Article and Full-Text PDF

Direct and Delayed Mortality of Ceriodaphnia dubia and Rainbow Trout Following Time-Varying Acute Exposures to Zinc.

Environ Toxicol Chem 2021 Jul 20. Epub 2021 Jul 20.

James Madison University, Harrisonburg, Virginia, USA.

The potential for delayed mortality following short-term episodic pollution events was evaluated by exposing cladocerans (Ceriodaphnia dubia) and rainbow trout (Oncorhynchus mykiss) to zinc (Zn) in various 1- to 48-h and 1- to 96-h exposures, respectively, followed by transferring the exposed organisms to clean water for up to 47 h for C. dubia and up to 95 h for trout for additional observation. For C. Read More

View Article and Full-Text PDF

Reproductive and thyroid endocrine axis cross-talk in rainbow trout (Oncorhynchus mykiss) alevins.

Gen Comp Endocrinol 2021 Jul 17;312:113855. Epub 2021 Jul 17.

Simon Fraser University, Department of Biological Sciences, 8888 University Dr, Burnaby, BC V5A 1S6, Canada.

The goal of this study was to characterize morphological and molecular effects in rainbow trout alevins after waterborne exposures to 17β-estradiol (E2; 0.0008 to 0.5 μg/L), triiodothyronine (T3; 0. Read More

View Article and Full-Text PDF

Responses of microRNA and predicted mRNA and enzymatic targets in liver of two salmonids (Oncorhynchus mykiss and Salvelinus fontinalis) following air exposure.

Comp Biochem Physiol B Biochem Mol Biol 2021 Jul 13;256:110646. Epub 2021 Jul 13.

University of Waterloo, 200 University Ave W., Waterloo, Ontario, Canada.

The acute stress response is well-characterized, with rainbow trout as a teleost model for physiological and molecular responses. Air exposure, which stimulates an acute stress response, modulates liver microRNAs in rainbow trout; however, these highly conserved non-coding RNAs that bind to mRNA and repress translation, have never been measured in brook trout and it is unknown how miRNA expression responds following air exposure in this less studied salmonid. Our objective was to characterize the effects of air exposure on rainbow and brook trout liver miRNA expression, as well as the mRNA expression and enzyme activity that the miRNAs are predicted to target. Read More

View Article and Full-Text PDF

Evaluation of different packaging methods and storage temperature on MPs abundance and fillet quality of rainbow trout.

J Hazard Mater 2021 Jul 7;420:126573. Epub 2021 Jul 7.

Department of Aquaculture, Faculty of Fisheries, Ataturk University, TR-25030 Erzurum, Turkey.

There are many studies on microplastics (MPs) about the aquatic ecosystems and its components. However, there is limited study on the MPs abundance, identification and sources in processed seafood products which are manufactured for direct human consumption. In this study, rainbow trout (Oncorhynchus mykiss) fillets were packed with different packaging techniques and stored at two different temperatures (+4 and -20°C) for 21 days. Read More

View Article and Full-Text PDF

Cyanotoxins within and Outside of Cause Adverse Effects in Rainbow Trout ().

Environ Sci Technol 2021 Jul 15. Epub 2021 Jul 15.

School of Environmental Sciences, University of Guelph, Guelph, Ontario N1G 2W1, Canada.

The global expansion of toxic blooms, and production of cyanotoxins including microcystins, are an increasing risk to freshwater fish. Differentiating intracellular and extracellular microcystin toxicity pathways (i.e. Read More

View Article and Full-Text PDF

Cytochrome P450 Inhibition by Antimicrobials and Their Mixtures in Rainbow Trout Liver Microsomes In Vitro.

Environ Toxicol Chem 2021 Jul 13. Epub 2021 Jul 13.

Faculty of Pharmacy, Drug Research Program, University of Helsinki, Helsinki, Finland.

Antimicrobials are ubiquitous in the environment and can bioaccumulate in fish. In the present study, we determined the half-maximal inhibitory concentrations (IC50) of seven environmentally abundant antimicrobials (ciprofloxacin, clarithromycin, clotrimazole, erythromycin, ketoconazole, miconazole, and sulfamethoxazole) on the cytochrome P450 (CYP) system in rainbow trout (Oncorhynchus mykiss) liver microsomes, using 7-ethoxyresorufin O-deethylation (EROD, CYP1A) and 7-benzyloxy-4-trifluoromethylcoumarin O-debenzylation (BFCOD, CYP3A) as model reactions. Apart from ciprofloxacin and sulfamethoxazole, all antimicrobials inhibited either EROD or BFCOD activities or both at concentrations below 500 µM. Read More

View Article and Full-Text PDF

Integrating Bioavailability of Metals in Fish Population Models.

Environ Toxicol Chem 2021 Jul 13. Epub 2021 Jul 13.

Ghent University (UGent), Laboratory of Environmental Toxicology and Aquatic Ecology, Environmental Toxicology Unit (GhEnToxLab), Campus Coupure, Building F - 2nd floor, Coupure Links 653, B-9000, Ghent, Belgium.

Population models are increasingly being used to extrapolate individual-level effects of chemicals, including metals, to population-level effects. For metals, it is also important to take into account their bioavailability to correctly predict metal toxicity in natural waters. However, to our knowledge, no models exist that integrate metal bioavailability into population modeling. Read More

View Article and Full-Text PDF

Cardiac Toxicity of Cadmium Involves Complex Interaction Between Multiple Ion Currents in Rainbow Trout (Oncorhynchus mykiss) Ventricular Myocytes.

Environ Toxicol Chem 2021 Jul 13. Epub 2021 Jul 13.

University of Eastern Finland, Department of Environmental and Biological Sciences, P.O. Box 111, 80101, Joensuu, Finland.

Cadmium (Cd ) is cardiotoxic to fish, but its effect on the electrical excitability of cardiac myocytes is largely unknown. To this end, we used the whole-cell patch-clamp method to investigate the effects of Cd on ventricular action potentials (APs) and major ion currents in the rainbow trout (Oncorhynchus mykiss) ventricular myocytes. Trout were acclimated to +4°C, and APs were measured at the acclimation temperature and elevated temperature (+18°C). Read More

View Article and Full-Text PDF

Central administration of endocannabinoids exerts bimodal effects in food intake of rainbow trout.

Horm Behav 2021 Jul 6;134:105021. Epub 2021 Jul 6.

Centro de Investigación Mariña, Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, Spain. Electronic address:

The endocannabinoid system (ECs) is known to participate in several processes in mammals related to synaptic signaling including regulation of food intake, appetite and energy balance. In fish, the relationship of ECs with food intake regulation is poorly understood. In the present study, we assessed in rainbow trout Oncorhynchus mykiss the effect of intracerebroventricular administration (ICV) of low and high doses of the endocannabinoids anandamide (AEA) and 2-arachidonoylglycerol (2-AG) on food intake. Read More

View Article and Full-Text PDF

sp. nov., isolated from rainbow trout and water.

Int J Syst Evol Microbiol 2021 Jul;71(7)

Microbiologia, Departament de Biologia, Edifici Guillem Colom, Universitat de les Illes Balears, Campus UIB, 07122 Palma de Mallorca, Spain.

Cells of strains P66, V1 and W15Feb18 are Gram-stain-negative short rods and motile by one polar flagellum. Strain P66 was isolated from rainbow trout () cultivated at a fish farm in Turkey. Strain V1 was isolated from sand of an intertidal shore on the Galicia coast in Spain and strain W15Feb18 was isolated from water collected at the Woluwe River in Belgium. Read More

View Article and Full-Text PDF

Effect of atrial artificial electrical stimulation on depolarization and repolarization and hemodynamics of the heart ventricle in rainbow trout Oncorhynchus mykiss.

Fish Physiol Biochem 2021 Aug 9;47(4):1329-1339. Epub 2021 Jul 9.

Institute of Physiology, Federal Research Centre Komi Science Centre, Ural Branch, Russian Academy of Sciences, 50, Pervomayskaya str., Syktyvkar, 167982, Komi Republic, Russia.

The spatial-temporal organization of the activation, repolarization and hemodynamics of the heart ventricle in rainbow trout, Oncorhynchus mykiss, adapted to a temperature of 5-7 °C, were studied from the normal sinus rhythm (21.6 ± 4.9 bpm) to the highest possible heart rhythm (HR) (60 bpm), during which deterioration of the contractile activity of the myocardium occurred. Read More

View Article and Full-Text PDF

Efficient water treatment achieved in recirculating aquaculture system using woodchip denitrification and slow sand filtration.

Environ Sci Pollut Res Int 2021 Jul 7. Epub 2021 Jul 7.

Aquatic Production Systems, Natural Resources Institute Finland (Luke), Survontie 9A, FI-40500, Jyväskylä, Finland.

For a recirculating aquaculture system (RAS), a passive water treatment system was designed for efficient discharge nutrient removal and water reuse in RAS production. Denitrification in a woodchip bioreactor filled with birch wood (Betula pendula) followed by sand filtration was introduced into a side-loop of an experimental RAS rearing rainbow trout (Oncorhynchus mykiss). Denitrification efficiency remained high (96%) throughout the experiment and reached a nitrogen removal rate of 15 g NO-N m per day. Read More

View Article and Full-Text PDF

Effect of Carum copticum nano-essence against Saprolegnia and Fusarium, and the Use of Multiplex PCR Assay for the Detection of These Organisms in Rainbow trout Oncorhynchus mykiss.

Arch Razi Inst 2021 07 1;76(2):231-241. Epub 2021 Jul 1.

Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran.

This study aimed to investigate the fungal species isolation and confirmation by the Multiplex PCR method in aquatic fish. Evaluation of the inhibitory effect of nano-essential oils of Carum copticum on isolated fungal species was also conducted in this study. The PCR results showed that 3 out of 5 samples were diagnosed with Fusarium solani, and two of them were positive for Saprolegnia. Read More

View Article and Full-Text PDF

Normoxic limitation of maximal oxygen consumption rate, aerobic scope and cardiac performance in exhaustively exercised rainbow trout (Oncorhynchus mykiss).

J Exp Biol 2021 Jul 2. Epub 2021 Jul 2.

Department of Biological and Environmental Sciences, University of Gothenburg, PO Box 463, 405 30 Gothenburg, Sweden.

In fish, maximum O2 consumption rate (MO2max) and aerobic scope can be expanded following exhaustive exercise in hyperoxia; however, the mechanisms explaining this are yet to be identified. Here, in exhaustively exercised rainbow trout (Oncorhynchus mykiss), we assessed the influence of hyperoxia on MO2max, aerobic scope, cardiac function and blood parameters to address this knowledge gap. Relative to normoxia, MO2max was 33% higher under hyperoxia, and this drove a similar increase in aerobic scope. Read More

View Article and Full-Text PDF

Cell-mediated immune response against mycolic acids of Mycobacteroides salmoniphilum in rainbow trout Oncorhynchus mykiss.

Dev Comp Immunol 2021 Jul 2;124:104195. Epub 2021 Jul 2.

Tokyo University of Marine Science and Technology, Department of Marine Bioscience, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan. Electronic address:

Mycobacteriosis caused by Mycobacterium spp. causes economic damages to the world aquaculture industry. In mammals, mycolic acids contained in the cell wall of Mycobacterium spp. Read More

View Article and Full-Text PDF

Production of rainbow trout (Oncorhynchus mykiss) using black soldier fly (Hermetia illucens) prepupae-based formulations with differentiated fatty acid profiles.

Sci Total Environ 2021 Jun 25;794:148647. Epub 2021 Jun 25.

Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech (University of Liège), Passage des Déportés 2, 5030 Gembloux, Belgium. Electronic address:

The aquaculture sector is expanding rapidly and needs an increasing supply of fishery products. To ensure an ecological transition of this sector, alternative feed ingredients are required for fish nutrition. Potential alternatives include insects, particularly the black soldier fly (BSF, Hermetia illucens L. Read More

View Article and Full-Text PDF

Integrated multi-biomarker responses of juvenile rainbow trout (Oncorhynchus mykiss) to an environmentally relevant pharmaceutical mixture.

Ecotoxicol Environ Saf 2021 Sep 29;221:112454. Epub 2021 Jun 29.

Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth and Environment, University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium.

Pharmaceuticals are emerging pollutants of concern for aquatic ecosystems where they are occurring in complex mixtures. In the present study, the chronic toxicity of an environmentally relevant pharmaceutical mixture on juvenile rainbow trout (Oncorhynchus mykiss) was investigated. Five pharmaceuticals (paracetamol, carbamazepine, diclofenac, naproxen and irbesartan) were selected based on their detection frequency and concentration levels in the Meuse river (Belgium). Read More

View Article and Full-Text PDF
September 2021

Distribution of two isoforms of tryptophan hydroxylase in the brain of rainbow trout (Oncorhynchus mykiss). An in situ hybridization study.

Brain Struct Funct 2021 Jul 2. Epub 2021 Jul 2.

Food Intake Control Group, Departamento de Fisiología y Biotecnología de Peces, Instituto de Acuicultura de Torre de la Sal, Consejo Superior de Investigaciones Científicas (IATS-CSIC), 12595, Castellón, Spain.

Serotonin (5-HT) is one of the principal neurotransmitters in the nervous system of vertebrates. It is initially synthesized by hydroxylation of tryptophan (Trp) by means of tryptophan hydroxylase or TPH which is the rate-limiting enzyme in the production of 5-HT. In most vertebrates, there are two isoforms of TPH present, TPH1 and TPH2, which exhibit different catalytic or substrate specificity as well as different expression domains. Read More

View Article and Full-Text PDF

Folic Acid-Coated Nanochitosan Ameliorated the Growth Performance, Hematological Parameters, Antioxidant Status, and Immune Responses of Rainbow Trout ().

Front Vet Sci 2021 15;8:647722. Epub 2021 Jun 15.

Department of Fisheries, Science and Research Branch, Islamic Azad University, Tehran, Iran.

In recent years, chitosan has gained considerable attention due to its favorable properties such as excellent biocompatibility and biodegradability for which it can be used as a health supplement for delivering bioactive compounds in the food industry and nutrition. In the present study, the effect of nanochitosans coated with folic acid (FA) was considered on the growth performance, hematological parameters, antioxidant status, and serum immune responses of rainbow trout () fingerlings. Graded levels of FA-coated nanochitosan (0, 0. Read More

View Article and Full-Text PDF