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https://www.readbyqxmd.com/read/27913897/rainbow-trout-oncorhynchus-mykiss-pro-oxidant-and-genotoxic-responses-following-acute-and-chronic-exposure-to-the-antibiotic-oxytetracycline
#1
Sara Rodrigues, Sara C Antunes, Alberto T Correia, Bruno Nunes
Oxytetracycline (OTC), an antibacterial agent, is extensively used in aquaculture practices all over the world, but also in human and veterinary medicines. Because of its intensive use, low rates of absorption by treated animals, inadequate disposal, and low efficiency of removal in wastewater treatment plants, the potential harmful effects on aquatic organisms are of great concern. This work aimed to assess the effects of this antibiotic in rainbow trout, following both acute and chronic exposures. Catalase (CAT), total glutathione peroxidase (GPx), glutathione reductase (GRed) activities and lipid peroxidation (TBARS levels) were quantified as oxidative stress biomarkers, in gills and liver...
December 2, 2016: Ecotoxicology
https://www.readbyqxmd.com/read/27912771/a-dna-vaccine-encoding-the-viral-hemorrhagic-septicemia-virus-genotype-ivb-glycoprotein-confers-protection-in-muskellunge-esox-masquinongy-rainbow-trout-oncorhynchus-mykiss-brown-trout-salmo-trutta-and-lake-trout-salvelinus-namaycush
#2
Isaac F Standish, Elena V Millard, Travis O Brenden, Mohamed Faisal
BACKGROUND: The viral hemorrhagic septicemia virus (VHSV) is one of the most serious fish pathogens. In 2003, a novel sublineage (genotype IVb) of this deadly virus emerged in the Great Lakes basin causing serious fish kills. We have previously demonstrated that a DNA plasmid (pcDNA), containing a cytomegalovirus (CMV) promoter and the viral hemorrhagic septicemia virus (VHSV) genotype IVb glycoprotein (G) gene insert (designated pVHSivb-G) confers moderate protection in muskellunge (Esox masquinongy), a highly susceptible species upon challenge...
December 2, 2016: Virology Journal
https://www.readbyqxmd.com/read/27910760/immunomodulation-effect-of-aqueous-extract-of-the-artist-s-conk-medicinal-mushroom-ganoderma-applanatum-agaricomycetes-on-the-rainbow-trout-oncorhynchus-mykiss
#3
Azadeh Manayi, Mahdi Vazirian, Fereshteh Hassan Zade, Akram Tehranifard
It is well known that innate immunity in fish can be activated by many synthetic and natural immunos-timulants; several natural substances induced immunity in fish in previous surveys. This study discussed data regarding the effect of Ganoderma applanatum aqueous extract on the defense mechanisms of rainbow trout in feeding trials. Fish were fed 250, 500, and 1000 mg extract/kg diet 4 times daily. Growth, humoral parameters, lysozyme activity, and serum protein concentrations were assessed after a period of 45 days...
2016: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/27908991/genome-sequence-of-the-fish-pathogen-yersinia-ruckeri-strain-150-isolated-from-diseased-rainbow-trout
#4
Desirée Cascales, José A Guijarro, Pilar Reimundo, Ana I García-Torrico, Jessica Méndez
We present here the draft genome of a pathogenic Yersinia ruckeri strain, isolated from rainbow trout (Oncorhynchus mykiss) affected by enteric redmouth disease. The chromosome has 3,826,775 bp, a GC content of 46.88%, and is predicted to contain 3,538 coding sequences. The data will be useful for comparative pathogenicity studies.
December 1, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27903511/cardiac-remodeling-and-increased-central-venous-pressure-underlie-elevated-stroke-volume-and-cardiac-output-of-seawater-acclimated-rainbow-trout
#5
Jeroen Brijs, Erik Sandblom, Esmée Dekens, Joacim Näslund, Andreas Ekström, Michael Axelsson
Substantial increases in cardiac output (CO), stroke volume (SV) and gastrointestinal blood flow are essential for euryhaline rainbow trout (Oncorhyncus mykiss) osmoregulating in seawater. However, the underlying hemodynamic mechanisms responsible for these changes are unknown. By examining a range of circulatory and cardiac morphological variables of seawater- and freshwater-acclimated rainbow trout, the present study revealed a significantly higher central venous pressure (CVP) in seawater-acclimated trout (~0...
November 30, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/27899075/thermal-sensitivity-of-growth-indicates-heritable-variation-in-1-year-old-rainbow-trout-oncorhynchus-mykiss
#6
Matti Janhunen, Juha Koskela, Nguyễn Hữu Ninh, Harri Vehviläinen, Heikki Koskinen, Antti Nousiainen, Ngô Phú Thỏa
BACKGROUND: Rainbow trout is an important aquaculture species, which has a worldwide distribution across various production environments. The diverse locations of trout farms involve remarkable variation in environmental factors such as water temperature, which is of major importance for the performance of fish. Thus, robust fish that could thrive under different and suboptimal thermal conditions is a desirable goal for trout breeding. Using a split-family experimental design (40 full-/half-sib groups) for a rainbow trout population derived from the Finnish national breeding program, we studied how two different rearing temperatures (14 and 20 °C) affect feed intake, growth rate and feed conversion ratio in 1-year-old fish...
November 29, 2016: Genetics, Selection, Evolution: GSE
https://www.readbyqxmd.com/read/27893995/combined-effects-of-cadmium-temperature-and-hypoxia-reoxygenation-on-mitochondrial-function-in-rainbow-trout-oncorhynchus-mykiss
#7
John O Onukwufor, Don Stevens, Collins Kamunde
Although aquatic organisms face multiple environmental stressors that may interact to alter adverse outcomes, our knowledge of stressor-stressor interaction on cellular function is limited. We investigated the combined effects of cadmium (Cd), hypoxia-reoxygenation (H-R) and temperature on mitochondrial function. Liver mitochondria from juvenile rainbow trout were exposed to Cd (0-20μM) and H-R (0 and 5min) at 5, 13 and 25°C followed by measurements of mitochondrial Cd load, volume, complex І active (A)↔deactive (D) transition, membrane potential, ROS release and ultrastructural changes...
November 18, 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/27889532/characterisation-of-zbtb46-and-dc-script-znf366-in-rainbow-trout-transcription-factors-potentially-involved-in-dendritic-cell-maturation-and-activation-in-fish
#8
Jun Wang, Tiehui Wang, Ottavia Benedicenti, Catherine Collins, Kaiyu Wang, Christopher J Secombes, Jun Zou
ZBTB46 and DC-SCRIPT/ZNF366 are two zinc finger transcription factors that play important roles in regulating differentiation of dendritic cells in mammals. In this study, the ZBTB46 and DC-SCRIPT/ZNF366 homologues were identified in rainbow trout Oncorhynchus mykiss and their expression analysed in vivo and in vitro. As transcription factors, they are well conserved in sequence, genomic organisation and gene synteny. Their expression was differentially modulated by bacterial and viral PAMPs in the monocyte/macrophage like cell line RTS-11, in primary head kidney (HK) macrophages, and in HK macrophages cultured with IL-4/13A...
November 23, 2016: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/27872197/plasma-exosomes-are-enriched-in-hsp70-and-modulated-by-stress-and-cortisol-in-rainbow-trout
#9
Erin Faught, Lynsi Henrickson, Mathilakath M Vijayan
Exosomes are endosomally-derived vesicles that are secreted from cells and contain a suite of molecules, including proteins and nucleic acids. Recent studies suggest the possibility that exosomes in circulation may be affecting recipient target cell function, but the modes of action are unclear. Here we tested the hypothesis that exosomes are in circulation in fish plasma and that these vesicles are enriched with heat shock protein 70 (Hsp70). Exosomes were isolated from rainbow trout (Oncorhynchus mykiss) plasma using differential centrifugation and their presence confirmed by transmission electron microscopy and the exosomal marker acetylcholinesterase...
November 21, 2016: Journal of Endocrinology
https://www.readbyqxmd.com/read/27862054/determination-of-target-fat-soluble-micronutrients-in-rainbow-trout-s-muscle-and-liver-tissues-by-liquid-chromatography-with-diode-array-tandem-mass-spectrometry-detection
#10
Virginia Pérez Fernández, Salvatore Ventura, Pierpaolo Tomai, Roberta Curini, Alessandra Gentili
This paper describes an analytical approach, based on liquid chromatography-diode array detection-tandem mass spectrometry (LC-DAD-MS/MS), for characterizing the fat-soluble micronutrient fraction in rainbow trout (Oncorhynchus mykiss). Two different procedures were applied to isolate the analytes from liver and muscle tissue: overnight cold saponification to hydrolyze bound forms and to simplify the analysis; matrix solid phase dispersion (MSPD) to avoid artifacts and to maintain unaltered the naturally occurring forms...
November 12, 2016: Electrophoresis
https://www.readbyqxmd.com/read/27860093/phylogenetic-and-functional-characterization-of-the-distal-intestinal-microbiome-of-rainbow-trout-oncorhynchus-mykiss-from-both-farm-and-aquarium-settings
#11
Philip P Lyons, James F Turnbull, Karl A Dawson, Mags Crumlish
AIMS: This study focused on comparing the phylogenetic composition and functional potential of the intestinal microbiome of rainbow trout sourced from both farm and aquarium settings. METHODS AND RESULTS: Samples of distal intestinal contents were collected from fish and subjected to high throughput 16S rRNA sequencing, to accurately determine the composition of the intestinal microbiome. The predominant phyla identified from both groups were Tenericutes, Firmicutes, Proteobacteria, Spirochaetae and Bacteroidetes...
November 8, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27859556/effect-of-nanosilver-on-cortisol-release-and-morphometrics-in-rainbow-trout-oncorhynchus-mykiss
#12
Laura Murray, Michael D Rennie, Eva C Enders, Kerri Pleskach, Jonathan D Martin
Nanosilver (nAg) is a nanoparticle commonly incorporated into consumer products for its antimicrobial properties that has been detected in aquatic environments. Toxic effects of nAg on fish have been observed and may induce a stress response in fish in the form of increased blood plasma cortisol. In this study, effects of nAg exposure on Rainbow Trout (Oncorhynchus mykiss) were investigated over a 28 d period using blood plasma cortisol concentrations as an indicator of stress. Several morphometric measures (growth, Fulton's condition factor, and hepatosomatic index or HSI) were also taken during the experiment to investigate potential whole-body effects of exposure, and concentrations of nAg in fish muscle tissue were measured...
November 17, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27859107/regional-diversity-reverses-the-negative-impacts-of-an-alien-predator-on-local-species-poor-communities
#13
Charlie J G Loewen, Rolf D Vinebrooke
Species diversity is often an implicit source of biological insurance for communities against the impacts of novel perturbations, such as the introduction of an invasive species. High environmental heterogeneity (e.g., a mountainous gradient) is expected to beget greater regional species diversity and variation in functional traits related to environmental tolerances. Thus, heterogeneous metacommunities are expected to provide more tolerant colonists that buffer stressed local communities in the absence of dispersal limitation...
October 2016: Ecology
https://www.readbyqxmd.com/read/27858313/complete-genomic-sequence-of-an-infectious-pancreatic-necrosis-virus-isolated-from-rainbow-trout-oncorhynchus-mykiss-in-china
#14
Feng Ji, Jing-Zhuang Zhao, Miao Liu, Tong-Yan Lu, Hong-Bai Liu, Jiasheng Yin, Li-Ming Xu
Infectious pancreatic necrosis (IPN) is a significant disease of farmed salmonids resulting in direct economic losses due to high mortality in China. However, no gene sequence of any Chinese infectious pancreatic necrosis virus (IPNV) isolates was available. In the study, moribund rainbow trout fry samples were collected during an outbreak of IPN in Yunnan province of southwest China in 2013. An IPNV was isolated and tentatively named ChRtm213. We determined the full genome sequence of the IPNV ChRtm213 and compared it with previously identified IPNV sequences worldwide...
November 18, 2016: Virus Genes
https://www.readbyqxmd.com/read/27848040/modifications-in-the-proteome-of-rainbow-trout-oncorhynchus-mykiss-embryo-and-fry-as-an-effect-of-triploidy-induction
#15
Samad Bahrami Babaheydari, Saeed Keyvanshokooh, Salar Dorafshan, Seyed Ali Johari
Two-dimensional gel electrophoresis (2-DE), matrix-assisted laser desorption/ionization tandem time-of-flight (MALDI-TOF/TOF) mass spectrometry, and database searching were used to analyze the effects of triploidization heat shock treatment on protein expression in rainbow trout eyed embryo and fry. After fertilization, the eggs were incubated at 10 °C for 10 min. Half of the eggs were then subjected to heat shock for 10 min submerged in a 28 °C water bath to induce triploidy. The remainder was incubated normally and used as diploid controls...
November 15, 2016: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/27836722/multiple-gene-and-transcript-variants-encoding-trout-c-polysaccharide-binding-proteins-are-differentially-but-strongly-induced-after-infection-with-aeromonas-salmonicida
#16
Judith M Köbis, Henrike Rebl, Tom Goldammer, Alexander Rebl
Two 'trout C-polysaccharide-binding proteins,' TCBP1 and -2, with relevance to early inflammatory events have been discovered in the last century. The present study characterises the respective cDNA sequences from rainbow trout (Oncorhynchus mykiss), including multiple TCBP1 transcript variants. These variants are generated either by the use of alternative splice sites or the exclusion of exons. The longest mRNA isoform, TCBP1-1, encodes a 245-aa protein with a large signal peptide and a complement component C1q domain...
November 8, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27825025/modification-of-polychlorinated-phenols-and-evaluation-of-their-toxicity-biodegradation-and-bioconcentration-using-three-dimensional-quantitative-structure-activity-relationship-models
#17
Lidan Tong, Lixin Guo, Xiaojun Lv, Yu Li
Three-dimensional quantitative structure-activity relationship (3D-QSAR) models were established by comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA). Experimental toxicity data in Poecilia reticulata (pLC50) and physico-chemical properties for 12 polychlorinated phenols were used as dependent and as independent variables, respectively. Among the 12 polychlorinated phenols, nine were randomly selected and used as a training set to construct the 3D-QSAR models through the SYBYL-X software to predict the pLC50 values of the remaining 8 polychlorinated phenols congeners, and the other three polychlorinated phenols were used as a test set to evaluate the 3D-QSAR models (the training set and test set were arranged randomly, shuffled 60 times)...
October 21, 2016: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/27822248/proteomic-analysis-of-muscle-tissue-from-rainbow-trout-oncorhynchus-mykiss-fed-dietary-%C3%AE-glucan
#18
Gh Ghaedi, S Keyvanshokooh, H Mohammadi Azarm, M Akhlaghi
The aim of this study was to examine the changes in muscle proteome of the rainbow trout fed dietary β-glucan. The experimental diets contained 0 (control), 0.1% and 0.2% β-1,3/1,6 yeast glucan. First, feeding larvae were fed to apparent satiation nine times per day with their respective diets over two months. The percentage of body weight gain and feed efficiency of fish fed 0.2% diet was significantly higher than those of fish fed the control and 0.1% diets. Fish fed the control and 0.2% diets were subjected to proteomic analysis...
2016: Iranian journal of veterinary research
https://www.readbyqxmd.com/read/27815242/unsteady-laminar-boundary-layers-of-rainbow-trout-swimming-in-turbulent-flows
#19
Kazutaka Yanase, Pentti Saarenrinne
The boundary layers of rainbow trout, Oncorhynchus mykiss [mean±s.d., 0.231±0.016 m total-body-length (L); N=6], swimming at 1.6±0.09 L s(-1) (N=6) in an experimental flow channel (the Reynolds number, Re=4×10(5)) with medium turbulence (5.6%-intensity) were examined using the particle image velocimetry technique. The tangential-flow-velocity distributions in the pectoral (arc-length from the rostrum, lx=71±8 mm, N=3) and pelvic surface regions (lx=110±13 mm, N=4) were approximated by a laminar-boundary-layer model, the Falkner-and-Skan equation...
November 8, 2016: Biology Open
https://www.readbyqxmd.com/read/27813470/genetic-improvement-of-feed-conversion-ratio-via-indirect-selection-against-lipid-deposition-in-farmed-rainbow-trout-oncorhynchus-mykiss-walbaum
#20
Antti Kause, Anders Kiessling, Samuel A M Martin, Dominic Houlihan, Kari Ruohonen
In farmed fish, selective breeding for feed conversion ratio (FCR) may be possible via indirectly selecting for easily-measured indicator traits correlated with FCR. We tested the hypothesis that rainbow trout with low lipid% have genetically better FCR, and that lipid% may be genetically related to retention efficiency of macronutrients, making lipid% a useful indicator trait. A quantitative genetic analysis was used to quantify the benefit of replacing feed intake in a selection index with one of three lipid traits: body lipid%, muscle lipid% or viscera% weight of total body weight (reflecting visceral lipid)...
November 2016: British Journal of Nutrition
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