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https://www.readbyqxmd.com/read/28724221/impact-of-the-nsaid-diclofenac-on-survival-development-behaviour-and-health-of-embryonic-and-juvenile-stages-of-brown-trout-salmo-trutta-f-fario
#1
Simon Schwarz, Hannah Schmieg, Marco Scheurer, Heinz-R Köhler, Rita Triebskorn
The NSAID diclofenac is controversially discussed with respect to its environmental relevance. Since further information is need to assess whether diclofenac should be included as substance of priority in the EU water framework directive, we investigated the impact of this analgesic on the embryonic development of brown trout (Salmo trutta f. fario) from fertilized egg until the end of sac-fry stage and studied effects in juvenile fish six months post hatch. Embryos were exposed to five test concentrations (0...
July 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28723948/integrative-functional-analyses-using-rainbow-trout-selected-for-tolerance-to-plant-diets-reveal-nutrigenomic-signatures-for-soy-utilization-without-the-concurrence-of-enteritis
#2
Jason Abernathy, Andreas Brezas, Kevin R Snekvik, Ronald W Hardy, Ken Overturf
Finding suitable alternative protein sources for diets of carnivorous fish species remains a major concern for sustainable aquaculture. Through genetic selection, we created a strain of rainbow trout that outperforms parental lines in utilizing an all-plant protein diet and does not develop enteritis in the distal intestine, as is typical with salmonids on long-term plant protein-based feeds. By incorporating this strain into functional analyses, we set out to determine which genes are critical to plant protein utilization in the absence of gut inflammation...
2017: PloS One
https://www.readbyqxmd.com/read/28723590/cardioprotective-mitochondrial-binding-by-hexokinase-i-is-induced-by-a-hyperoxic-acute-thermal-insult-in-the-rainbow-trout-oncorhynchus-mykiss
#3
Neal Ingraham Callaghan, Kenneth Javier Williams, Tyson James MacCormack
Due to the substantial photosynthetic biomass in their habitat, salmonids such as the rainbow trout (Oncorhynchus mykiss) can be subject to hyperoxia in addition to high temperatures associated with climate change. Both stressful conditions increase the incidence of damaging reactive oxygen species (ROS). The mitochondrial association of hexokinase has been shown to increase in the hearts of certain fish experiencing hypoxia in a putative cardioprotective response to oxidative stress. In this study, the mitochondrial association of hexokinase I (HKI) and markers of oxidative damage and metabolic stress were probed to elucidate the cardioprotective role of hexokinase in the rainbow trout...
July 16, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28720888/bivalent-dna-vaccine-induces-significant-immune-responses-against-infectious-hematopoietic-necrosis-virus-and-infectious-pancreatic-necrosis-virus-in-rainbow-trout
#4
Liming Xu, Jingzhuang Zhao, Miao Liu, Guangming Ren, Feng Jian, Jiasheng Yin, Ji Feng, Hongbai Liu, Tongyan Lu
Infectious hematopoietic necrosis virus (IHNV) and infectious pancreatic necrosis virus (IPNV) are important pathogens of salmon and trout. An active bivalent DNA vaccine was constructed with the glycoprotein gene of Chinese IHNV isolate Sn1203 and VP2-VP3 gene of Chinese IPNV isolate ChRtm213. Rainbow trout (5 g) were vaccinated by intramuscular injection with 1.0 µg of the bivalent DNA vaccine and then challenged with an intraperitoneal injection of IHNV, IPNV, or both, at 30 and 60 days post-vaccination (d...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28715257/association-between-testicular-microlithiasis-and-testicular-neoplasia-large-multicenter-study-in-a-pediatric-population
#5
Andrew T Trout, Jeanne Chow, Erin R McNamara, Kassa Darge, Raul Ramirez Grueso, Marthe Munden, Sarah M Rothan, Oscar M Navarro, Marta Tijerín Bueno, Kevin E Bove, Kudakwashe R Chikwava, Amer Heider, M John Hicks, Gino R Somers, Bin Zhang, Jonathan R Dillman
Purpose To retrospectively define the strength of association between testicular microlithiasis and testicular neoplasia in a large geographically diverse pediatric population. Materials and Methods Retrospective review of scrotal ultrasonographic (US) examination reports and pathology specimens obtained between January 2000 and May 2014 at six academic pediatric hospitals in North America was performed. Reported cases were reviewed to confirm microlithiasis. Radiology and pathology data bases were searched for pathology-proven testicular tumors (benign or malignant germ cell or stromal tumors)...
July 17, 2017: Radiology
https://www.readbyqxmd.com/read/28712589/exposure-to-a-contextually-neutral-stressor-potentiates-fear-conditioning-in-juvenile-rainbow-trout-oncorhynchus-mykiss
#6
Brandon S Demuth, Maud C O Ferrari, Lynn P Weber, David M Janz, Douglas P Chivers
Organisms faced with stressors deploy a suite of adaptive responses in the form of behavioral, physiological and cognitive modifications to overcome the challenge. Interactive effects of these responses are known to influence learning and memory processes and facilitation is thought to be dependent, in part, upon contextual relevance of the stressor to the learning task. Predation is one such stressor for prey animals, and their ability to manage reliable information about predators is essential for adaptive antipredator strategies...
July 13, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28711771/toxicity-of-organic-compounds-from-unresolved-complex-mixtures-ucms-to-primary-fish-hepatocytes
#7
Karina Petersen, Maria T Hultman, Steven J Rowland, Knut Erik Tollefsen
Many environmental matrices contaminated with organic pollutants derived from crude oil or degraded petroleum contain mixtures so complex that they are typically unresolved by conventional analytical techniques such as gas chromatography. The resulting chromatographic features have become known as 'humps' or unresolved complex mixtures (UCMs). These UCMs often dominate the organic contaminants of polluted environmental samples: for example, in oil sands produced water up to 150mgL(-1) of 'naphthenic acids' appear as UCMs when examined by gas chromatography as the esters...
June 29, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28707702/secondary-immune-response-of-rainbow-trout-following-repeated-immersion-vaccination
#8
R M Jaafar, A Al-Jubury, J K Chettri, I Dalsgaard, P W Kania, K Buchmann
Teleosts are able to raise a protective immune response, comprising both innate and adaptive elements, against various pathogens. This is the basis for a widespread use of vaccines, administered as injection or immersion, in the aquaculture industry. It has been described that repeated injection vaccination of fish raises a secondary immune response, consisting of rapid, accelerated and increased antibody reaction. This study reports how rainbow trout responds to repeated immersion vaccination against yersiniosis (ERM) caused by the bacterial pathogen Yersinia ruckeri...
July 14, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28697814/antiprotozoal-effects-of-metal-nanoparticles-against-ichthyophthirius-multifiliis
#9
Mona Saleh, Abdel-Azeem Abdel-Baki, Mohamed A Dkhil, Mansour El-Matbouli, Saleh Al-Quraishy
Ichthyophthirius multifiliis is a widespread, ciliated protozoan ectoparasite of fish. In the present study, we investigated the effects of metal nanoparticles on the reproduction and infectivity of free-living stages of I. multifiliis. We determined that ~50% of theronts could be killed within 30 min of exposure to either 20 ng mL-1 gold, 10 ng mL-1 silver or 5 ng mL-1 zinc oxide nanoparticles. Silver and zinc oxide nanoparticles at concentration of 10 and 5 ng mL-1 killed 100 and 97% of theronts, respectively and inhibited reproduction of tomonts after 2 h exposure...
July 12, 2017: Parasitology
https://www.readbyqxmd.com/read/28696830/influence-of-temperature-on-the-efficacy-of-homologous-and-heterologous-dna-vaccines-against-viral-hemorrhagic-septicemia-in-pacific-herring
#10
Lucas M Hart, Niels Lorenzen, Katja Einer-Jensen, Maureen K Purcell, Paul K Hershberger
Homologous and heterologous (genogroup Ia) DNA vaccines against viral hemorrhagic septicemia virus (genogroup IVa) conferred partial protection in Pacific Herring Clupea pallasii. Early protection at 2 weeks postvaccination (PV) was low and occurred only at an elevated temperature (12.6°C, 189 degree days), where the relative percent survival following viral exposure was similar for the two vaccines (IVa and Ia) and higher than that of negative controls at the same temperature. Late protection at 10 weeks PV was induced by both vaccines but was higher with the homologous vaccine at both 9...
September 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28693787/secretin-enhanced-magnetic-resonance-cholangiopancreatography-for-assessing-pancreatic-secretory-function-in-children
#11
Andrew T Trout, Daniel B Wallihan, Suraj Serai, Maisam Abu-El-Haija
OBJECTIVE: To assess the accuracy and interrater reproducibility of measurements of pancreatic secretory function by magnetic resonance cholangiopancreatography in response to secretin administration and to describe our experience using the technique to noninvasively assess pancreatic secretory function in a pediatric population. STUDY DESIGN: In the accuracy study, phantoms with varying fluid volume (47-206 mL) were imaged using the clinical quantification sequence...
July 7, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28691159/establishment-of-a-hepatocyte-line-for-studying-biosynthesis-of-long-chain-polyunsaturated-fatty-acids-from-a-marine-teleost-the-white-spotted-spinefoot-siganus-canaliculatus
#12
Y Liu, Q H Zhang, Y W Dong, C H You, S Q Wang, Y Q Li, Y Y Li
A hepatocyte line was established from the liver of white-spotted spinefoot Siganus canaliculatus to study the biosynthesis of long-chain polyunsaturated fatty acids (LC-PUFA). The cells from the line, designated S. canaliculatus hepatocyte line (SCHL), grew and multiplied well in Dulbecco's modified Eagle's medium (DMEM)-F12 medium supplemented with 20 mM 4-(2-hydroxyethyl) piperazine-1-ethanesulphonic acid (HEPES), 10% foetal bovine serum (FBS) and 0·5% rainbow trout Oncorhychus mykiss serum at 28° C, showing an epithelial-like morphology and the normal chromosome number of 48 (2n) and have been subcultured for over 60 passages...
July 9, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28690822/genetic-differences-between-wild-and-hatchery-bred-brown-trout-salmo-trutta-l-in-single-nucleotide-polymorphisms-linked-to-selective-traits
#13
Arne N Linløkken, Thrond O Haugen, Matthew P Kent, Sigbjørn Lien
To study effects from natural selection acting on brown trout in a natural stream habitat compared with a hatchery environment, 3,781 single nucleotide polymorphism (SNP) markers were analyzed in three closely related groups of brown trout (Salmo trutta L.). Autumn (W/0+, n = 48) and consecutive spring (W/1+, n = 47) samples of brown trout individuals belonging to the same cohort and stream were retrieved using electrofishing. A third group (H/1+, n = 48) comprised hatchery-reared individuals, bred from a mixture of wild parents of the strain of the two former groups and from a neighboring stream...
July 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28689849/screening-for-microplastics-in-sediment-water-marine-invertebrates-and-fish-method-development-and-microplastic-accumulation
#14
Therese M Karlsson, A Dick Vethaak, Bethanie Carney Almroth, Freek Ariese, Martin van Velzen, Martin Hassellöv, Heather A Leslie
Measurements of microplastics in biota and abiotic matrices are key elements of exposure and risk assessments for this emerging environmental pollutant. We investigated the abundance of microplastics in field-collected biota, sediment and water. An improved sediment extraction method, based on density separation was developed. For analysis of microplastics in biota we found that an adapted enzymatic digestion protocol using proteinase K performed best, with a 97% recovery of spiked plastic particles and no observed degradation effects on the plastics in subsequent Raman analysis...
July 6, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28689064/transfer-of-zearalenone-to-the-reproductive-system-of-female-rainbow-trout-spawners-a-potential-risk-for-aquaculture-and-fish-consumers
#15
Maciej Woźny, Kazimierz Obremski, Tomasz Zalewski, Maren Mommens, Alicja Łakomiak, Paweł Brzuzan
To investigate whether ZEN transfers from the alimentary tract of fish to the somatic cells of ovaries or the oocytes, mature females of rainbow trout were orally exposed to ZEN at a dose of 1 mg·kg(-)(1) body mass. At sampling times of 2, 6, 12, 24, 48, and 96 h, tissues of the fish (intestine, liver, ovaries, oocytes, muscles, and plasma) were extracted to determine the concentration of ZEN and its metabolites using immunoaffinity columns and HPLC-FLD. Our results confirm that ZEN is transferred from the alimentary tract to the reproductive system of the fish, and indicate that the mycotoxin concentrates in the somatic cells of the ovaries...
July 5, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28689032/a-total-diet-study-and-probabilistic-assessment-risk-assessment-of-dietary-mercury-exposure-among-first-nations-living-on-reserve-in-ontario-canada
#16
Amanda K Juric, Malek Batal, Will David, Donald Sharp, Harold Schwartz, Amy Ing, Karen Fediuk, Andrew Black, Constantine Tikhonov, Hing Man Chan
Methyl Mercury (MeHg) exposure is a global environmental health concern. Indigenous peoples around the world are susceptible to MeHg exposure from often higher fish consumption compared to general populations. The objective of this study was to estimate dietary exposure to methylmercury (MeHg) among First Nations living on-reserve in the province of Ontario, Canada. A total diet study was constructed based on a 24-h recall from the First Nations Food, Nutrition, and Environment Study (FNFNES), and measured contaminant concentrations from Health Canada for market foods, and FNFNES for traditional foods...
July 6, 2017: Environmental Research
https://www.readbyqxmd.com/read/28688366/differentiation-of-flavobacterium-psychrophilum-from-flavobacterium-psychrophilum-like-species-by-maldi-tof-mass-spectrometry
#17
Marta Pérez-Sancho, Ana Isabel Vela, Tom Wiklund, Markus Kostrzewa, Lucas Domínguez, José Francisco Fernández-Garayzábal
Rainbow trout fry syndrome (RTFS) is an important infectious disease caused by Flavobacterium psychrophilum affecting farmed salmonids worldwide. Other Flavobacterium psychrophilum-like species (F. plurextorum, F. oncorhynchi, F. tructae, F. collinsii and F. piscis) have been isolated from diseased rainbow trout fry suspected of RTFS although the epidemiological and clinical relevance of these pathogens are unknown. The objective of this study was to evaluate the potential use of MALDI-TOF (Matrix-Assisted Laser Desorption/Ionization-Time of Flight) Mass Spectrometry as method for specific identification of F...
June 29, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28687414/ovarian-expression-and-localization-of-clathrin-cltc-components-in-cutthroat-trout-oncorhynchus-clarki-evidence-for-cltc-involvement-in-endocytosis-of-vitellogenin-during-oocyte-growth
#18
Hiroko Mizuta, Yuji Mushirobira, Jun Nagata, Takashi Todo, Akihiko Hara, Benjamin J Reading, Craig V Sullivan, Naoshi Hiramatsu
To evaluate potential involvement of clathrin in endocytosis of vitellogenin (Vtg) by teleost oocytes, cDNAs encoding clathrin heavy chain (cltc) were cloned from ovaries of cutthroat trout. Quantitative PCR revealed three types of cltc (cltc-a1, cltc-a2, cltc-b) to be expressed in 10 different tissues including the ovary. The cltc-a1 alone exhibited a significant decrease in ovarian expression during vitellogenesis; this was correlated with a corresponding decrease in transcripts encoding the major Vtg receptor (Vtgr)...
July 4, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28687361/combined-effects-of-diets-and-temperature-on-mitochondrial-function-growth-and-nutrient-efficiency-in-rainbow-trout-oncorhynchus-mykiss
#19
Jonathan C Eya, Rodrigue Yossa, Dayan Perera, Olasupo Okubajo, Ann Gannam
A 4×3 factorial experiment was conducted to evaluate the effects of two dietary protein sources (mixed fishmeal/plant protein-, and plant protein- based diet), two dietary lipid levels (10% and 20%) and three water temperatures (10°C, 14°C, and 18°C) on the growth performance, nutrient utilization efficiencies and mitochondrial enzyme complex activities in rainbow trout Oncorhynchus mykiss (average weight±SD, 39.5±5g) over a 180day rearing period. At the end of the experiment, weight gain (WG), condition factor (CF), and feed efficiency (FE) were significantly affected by diet×temperature interaction (P<0...
July 4, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28686496/polychlorinated-biphenyls-and-polychlorinated-dioxins-furans-in-lake-trout-and-whitefish-composite-samples-from-commercial-fisheries-in-lakes-erie-huron-and-superior
#20
Dorothea F K Rawn, Michael Dowd, Matthew J S Scuby, Peter P Pantazopoulos, Mark Feeley
Polychlorinated biphenyls (PCBs; sum of 36 congeners) and polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs; sum of 17 2,3,7,8-substituted congeners) were measured in 93 composite samples prepared from individual lake trout (Salvelinus namaycush) and whitefish (Coregonus clupeaformis) samples collected from Lake Erie, Lake Huron, and Lake Superior. All samples had detectable concentrations of PCBs and PCDD/Fs; maximum PCB concentrations in both trout (750 ng g(-1) whole weight [ww]) and whitefish (210 ng g(-1) ww) were found in composites from fish collected from Lake Huron...
July 7, 2017: Journal of Food Protection
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