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https://www.readbyqxmd.com/read/28097071/the-fishing-and-natural-mortality-of-large-piscivorous-bull-trout-and-rainbow-trout-in-kootenay-lake-british-columbia-2008-2013
#1
Joseph L Thorley, Greg F Andrusak
BACKGROUND: Estimates of fishing and natural mortality are important for understanding, and ultimately managing, commercial and recreational fisheries. High reward tags with fixed station acoustic telemetry provides a promising approach to monitoring mortality rates in large lake recreational fisheries. Kootenay Lake is a large lake which supports an important recreational fishery for large Bull Trout and Rainbow Trout. METHODS: Between 2008 and 2013, 88 large (≥500 mm) Bull Trout and 149 large (≥500 mm) Rainbow Trout were marked with an acoustic transmitter and/or high reward ($100) anchor tags in Kootenay Lake...
2017: PeerJ
https://www.readbyqxmd.com/read/28093775/how-does-temperature-influences-the-development-of-lactococcosis-transcriptomic-and-immunoproteomic-in%C3%A2-vitro-approaches
#2
R Castro, M Reguera-Brito, G H López-Campos, M M Blanco, M Aguado-Urda, J F Fernández-Garayzábal, A Gibello
Lactococcus garvieae is the aetiological agent of lactococcosis, a haemorrhagic septicaemia that affects marine and freshwater fish, with special incidence and economic relevance in farmed rainbow trout. Water temperature is one of the most important predisposing factors in the development of lactococcosis outbreaks. Lactococcosis in trout usually occur when water temperatures rise to about 18 °C, while fish carriers remain asymptomatic at temperatures below 13 °C. The aim of this work was to analyse the differences in the complete transcriptome response of L...
January 17, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28092768/mercury-levels-in-herring-gulls-and-fish-42-years-of-spatio-temporal-trends-in-the-great-lakes
#3
E Agnes Blukacz-Richards, Ariola Visha, Matthew L Graham, Daryl L McGoldrick, Shane R de Solla, David J Moore, George B Arhonditsis
Total mercury levels in aquatic birds and fish communities have been monitored across the Canadian Great Lakes by Environment and Climate Change Canada (ECCC) for the past 42 years (1974-2015). These data (22 sites) were used to examine spatio-temporal variability of mercury levels in herring gull (Larus argentatus) eggs, lake trout (Salvelinus namaycush), walleye (Sander vitreus), and rainbow smelt (Osmerus mordax). Trends were quantified with dynamic linear models, which provided time-variant rates of change of mercury concentrations...
December 30, 2016: Chemosphere
https://www.readbyqxmd.com/read/28088374/fibrinogen-in-traumatic-haemorrhage-a-narrative-review
#4
REVIEW
James Winearls, Don Campbell, Catherine Hurn, Jeremy Furyk, Glenn Ryan, Melita Trout, James Walsham, Anthony Holley, Megan Suttleworth, Wayne Dyer, Gerben Keijzers, Jeff Presneill, John F Fraser, Martin Wullschleger
Haemorrhage in the setting of severe trauma is associated with significant morbidity and mortality. There is increasing awareness of the important role fibrinogen plays in traumatic haemorrhage. Fibrinogen levels fall precipitously in severe trauma and the resultant hypofibrinogenaemia is associated with poor outcomes. Hence, it has been postulated that early fibrinogen replacement in severe traumatic haemorrhage may improve outcomes, although, to date there is a paucity of high quality evidence to support this hypothesis...
December 26, 2016: Injury
https://www.readbyqxmd.com/read/28088362/molecular-characterization-of-a-novel-orthomyxovirus-from-rainbow-and-steelhead-trout-oncorhynchus-mykiss
#5
William N Batts, Scott E LaPatra, Ryan Katona, Eric Leis, Terry Fei Fan Ng, Marine S O Brieuc, Rachel B Breyta, Maureen K Purcell, Carla M Conway, Thomas B Waltzek, Eric Delwart, James R Winton
A novel virus, rainbow trout orthomyxovirus (RbtOV), was isolated in 1997 and again in 2000 from commercially-reared rainbow trout (Oncorhynchus mykiss) in Idaho, USA. The virus grew optimally in the CHSE-214 cell line at 15°C producing a diffuse cytopathic effect; however, juvenile rainbow trout exposed to cell culture-grown virus showed no mortality or gross pathology. Electron microscopy of preparations from infected cell cultures revealed the presence of typical orthomyxovirus particles. The complete genome of RbtOV is comprised of eight linear segments of single-stranded, negative-sense RNA having highly conserved 5' and 3'-terminal nucleotide sequences...
January 11, 2017: Virus Research
https://www.readbyqxmd.com/read/28088353/expansion-and-differentiation-of-igm-b-cells-in-the-rainbow-trout-peritoneal-cavity-in-response-to-different-antigens
#6
Rosario Castro, Beatriz Abós, Lucia González, Aitor G Granja, Carolina Tafalla
To date, intraperitoneal (i.p.) injection seems to be the most effective vaccination route in aquaculture, as many i.p. administered fish vaccines are capable of conferring strong and long-lasting immune responses. Despite this, how peritoneal leukocytes are regulated upon antigen encounter has only been scarcely studied in fish. Although, in the past, myeloid cells were thought to be the main responders to peritoneal inflammation, a recent study revealed that IgM(+) B cells are one of the main cell types in the teleost peritoneal cavity in response to pathogenic bacteria...
January 11, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28081271/beaver-colony-density-trends-on-the-chequamegon-nicolet-national-forest-1987-2013
#7
Christine A Ribic, Deahn M Donner, Albert J Beck, David J Rugg, Sue Reinecke, Dan Eklund
The North American beaver (Castor canadensis) is a managed species in the United States. In northern Wisconsin, as part of the state-wide beaver management program, the Chequamegon-Nicolet National Forest removes beavers from targeted trout streams on U.S. Forest Service lands. However, the success of this management program has not been evaluated. Targeted removals comprise only 3% of the annual beaver harvest, a level of effort that may not affect the beaver population. We used colony location data along Forest streams from 1987-2013 (Nicolet, northeast Wisconsin) and 1997-2013 (Chequamegon, northwest Wisconsin) to assess trends in beaver colony density on targeted trout streams compared to non-targeted streams...
2017: PloS One
https://www.readbyqxmd.com/read/28077766/historical-citizen-science-to-understand-and-predict-climate-driven-trout-decline
#8
Miguel Clavero, Miquel Ninyerola, Virgilio Hermoso, Ana Filipa Filipe, Magda Pla, Daniel Villero, Lluís Brotons, Miguel Delibes
Historical species records offer an excellent opportunity to test the predictive ability of range forecasts under climate change, but researchers often consider that historical records are scarce and unreliable, besides the datasets collected by renowned naturalists. Here, we demonstrate the relevance of biodiversity records developed through citizen-science initiatives generated outside the natural sciences academia. We used a Spanish geographical dictionary from the mid-nineteenth century to compile over 10 000 freshwater fish records, including almost 4 000 brown trout (Salmo trutta) citations, and constructed a historical presence-absence dataset covering over 2 000 10 × 10 km cells, which is comparable to present-day data...
January 11, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28077388/the-na-taurocholate-cotransporting-polypeptide-ntcp-slc10a1-ortholog-in-the-marine-skate-leucoraja-erinacea-is-not-a-physiological-bile-salt-transporter
#9
Dongke Yu, Han Zhang, Daniel A Lionarons, James L Boyer, Shi-Ying Cai
The Na(+)-dependent taurocholate co-transporting polypeptide (NTCP/SLC10A1) is a hepatocyte specific solute carrier, which plays an important role in maintaining bile salt homeostasis in mammals. The absence of an hepatic Na(+)-dependent bile salt transport system in marine skate and rainbow trout raises a question regarding the function of the Slc10a1 gene in these species. Here we have characterized the Slc10a1 gene in the marine skate, Leucoraja erinacea. The transcript of skate Slc10a1 (skSlc10a1) encodes 319 amino acids and shares 46% identity to human NTCP (hNTCP) with similar topology to mammalian NTCP...
January 11, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28074223/characterization-and-mechanism-of-anti-aeromonas-salmonicida-activity-of-a-marine-probiotic-strain-bacillus-velezensis-v4
#10
Xi-Yan Gao, Ying Liu, Li-Li Miao, Er-Wei Li, Guo-Xiang Sun, Ying Liu, Zhi-Pei Liu
The bacterium Aeromonas salmonicida is the causative agent of furunculosis, a systemic, ubiquitous disease of fish in the salmon family, characterized by high mortality and morbidity. Probiotics are a promising approach for prevention of furunculosis in aquaculture. A bacterial strain with anti-A. salmonicida properties, Bacillus velezensis V4, was isolated and the mechanisms underlying these properties were investigated. Anti-A. salmonicida compounds present in cell-free supernatant of V4 were purified and structurally identified as members of the iturin, macrolactin, and difficidin groups...
January 10, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28070298/community-structure-affects-trophic-ontogeny-in-a-predatory-fish
#11
Javier Sánchez-Hernández, Antti P Eloranta, Anders G Finstad, Per-Arne Amundsen
While most studies have focused on the timing and nature of ontogenetic niche shifts, information is scarce about the effects of community structure on trophic ontogeny of top predators. We investigated how community structure affects ontogenetic niche shifts (i.e., relationships between body length, trophic position, and individual dietary specialization) of a predatory fish, brown trout (Salmo trutta). We used stable isotope and stomach content analyses to test how functional characteristics of lake fish community compositions (competition and prey availability) modulate niche shifts in terms of (i) piscivorous behavior, (ii) trophic position, and (iii) individual dietary specialization...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28067297/regulation-of-fads2-transcription-by-srebp-1-and-ppar-%C3%AE-influences-lc-pufa-biosynthesis-in-fish
#12
Xiaojing Dong, Peng Tan, Zuonan Cai, Hanlin Xu, Jingqi Li, Wei Ren, Houguo Xu, Rantao Zuo, Jianfeng Zhou, Kangsen Mai, Qinghui Ai
The present study was conducted to explore the mechanisms leading to differences among fishes in the ability to biosynthesize long-chain polyunsaturated fatty acids (LC-PUFAs). Replacement of fish oil with vegetable oil caused varied degrees of increase in 18-carbon fatty acid content and decrease in n-3 LC-PUFA content in the muscle and liver of rainbow trout (Oncorhynchus mykiss), Japanese seabass (Lateolabrax japonicus) and large yellow croaker (Larimichthys crocea), suggesting that these fishes have differing abilities to biosynthesize LC-PUFAs...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28062226/molecular-characterization-and-expression-analysis-of-three-subclasses-of-igt-in-rainbow-trout-oncorhynchus-mykiss
#13
Nu Zhang, Xu-Jie Zhang, Dan-Dan Chen, J Oriol Sunyer, Yong-An Zhang
As the teleost specific immunoglobulin, IgT plays important roles in systemic and mucosal immunity. In the current study, in rainbow trout, we have cloned the heavy chain (Igτ) genes of a secretory form of IgT2 as well as the membrane and secretory forms of a third IgT subclass, termed IgT3. Conserved cysteine and tryptophan residues that are crucial for the folding of the immunoglobulin domain as well as hydrophobic and hydrophilic residues within CART motif were identified in all IgT subclasses. Through analysis of the rainbow trout genome assembly, Igτ3 gene was found localized upstream of Igτ1 gene, while Igτ2 gene situated on another scaffold...
January 3, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28062079/negligible-cytotoxicity-induced-by-different-titanium-dioxide-nanoparticles-in-fish-cell-lines
#14
Azucena Bermejo-Nogales, Mona Connolly, Philipp Rosenkranz, María-Luisa Fernández-Cruz, José M Navas
Titanium dioxide nanoparticles (TiO2-NPs) have a wide number of applications in cosmetic, solar and paint industries due to their photocatalyst and ultraviolet blocking properties. The continuous increase in the production of TiO2-NPs enhances the risk for this manufactured nanomaterial to enter water bodies through treated effluents or agricultural amendments. TiO2-NPs have shown very low toxicity in a number of aquatic organisms. However, there are no conclusive data about their deleterious effects and on their possible mechanisms of toxic action...
January 3, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28058484/hoverboards-spectrum-of-injury-and-association-with-an-uncommon-fracture
#15
Andrew H Schapiro, Neil U Lall, Christopher G Anton, Andrew T Trout
BACKGROUND: Self-balancing electric scooters, commonly known as hoverboards, are a new and popular consumer item with recognized fall hazards. The spectrum of injuries associated with hoverboard use has not been studied. OBJECTIVE: The purpose of this study is to determine the spectrum of radiologically apparent injuries associated with hoverboard use. MATERIALS AND METHODS: We retrospectively reviewed all imaging studies interpreted at our institution for hoverboard-related injuries during an 8-month period...
January 6, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28054408/non-native-fish-stocking-alters-stream-ecosystem-nutrient-dynamics
#16
Alexander V Alexiades, Alexander S Flecker, Clifford E Kraft
Each year, millions of hatchery raised fish are stocked annually into streams and rivers worldwide, yet the effects of hatchery raised fish on stream nutrient cycles has seldom been examined. We quantified the influence of supplemental non-native fish stocking, a widespread recreational fishery management practice, on in-stream nutrient storage and cycling. We predicted that supplemental, hatchery-raised brown trout (Salmo trutta) stocking would result in increased N and P supply relative to in-stream biotic demand for those nutrients and that stocked fishes would remineralize and store a significantly greater amount of N and P than the native fish community, due to higher areal biomass...
January 5, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28045944/pharmaceutical-metabolism-in-fish-using-a-3-d-hepatic-in-vitro-model-to-assess-clearance
#17
Matthew G Baron, Kate S Mintram, Stewart F Owen, Malcolm J Hetheridge, A John Moody, Wendy M Purcell, Simon K Jackson, Awadhesh N Jha
At high internal doses, pharmaceuticals have the potential for inducing biological/pharmacological effects in fish. One particular concern for the environment is their potential to bioaccumulate and reach pharmacological levels; the study of these implications for environmental risk assessment has therefore gained increasing attention. To avoid unnecessary testing on animals, in vitro methods for assessment of xenobiotic metabolism could aid in the ecotoxicological evaluation. Here we report the use of a 3-D in vitro liver organoid culture system (spheroids) derived from rainbow trout to measure the metabolism of seven pharmaceuticals using a substrate depletion assay...
2017: PloS One
https://www.readbyqxmd.com/read/28043835/mitigation-of-enniatins-in-edible-fish-tissues-by-thermal-processes-and-identification-of-degradation-products
#18
J Tolosa, G Font, J Mañes, E Ferrer
Emerging mycotoxins, such as enniatins and beauvericin, are common contaminants in vegetal matrices, but recently, the occurrence of mycotoxins in foodstuffs from animal origin has been also reported as they can be present in edible tissues of animals fed with contaminated feedstuffs. Sea bass, sea bream, Atlantic salmon and rainbow trout from aquaculture analyzed in the present survey showed contamination by emerging Fusarium mycotoxins enniatins (ENs). ENs were extracted from raw and cooked fish with acetonitrile and analyzed by Liquid Chromatography coupled to Mass Spectrometry...
December 31, 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28040062/influences-of-dietary-omega-3-fatty-acids-on-haematologic-and-immunologic-changes-in-rainbow-trout-milked-regularly
#19
M E Yonar, K Koprucu
In this study, it was examined the effects of dietary omega-3 fatty acids on the haematocrit (Ht), haemoglobin (Hb), mean corpuscular haemoglobin (MCH), total protein (TP) and total immunoglobulin (TI) values, erythrocyte (RBC) and leucocyte (WBC) counts, mean corpuscular volume (MCV), mean corpuscular haemoglobin concentration (MCHC), phagocytic index (PI) and nitroblue tetrazolium (NBT) activity in rainbow trout (Oncorhynchus mykiss) milked regularly. For this aim, one control and two experimental diets were prepared as isonitrogenous and isocaloric...
November 30, 2016: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28035235/ancestry-and-adaptive-evolution-of-anadromous-resident-and-adfluvial-rainbow-trout-oncorhynchus-mykiss-in-the-san-francisco-bay-area-application-of-adaptive-genomic-variation-to-conservation-in-a-highly-impacted-landscape
#20
Maeva Leitwein, John Carlos Garza, Devon E Pearse
The streams draining of into San Francisco Bay, California, have been impacted by habitat alteration for over 150 years, and roads, dams, water diversions, and other impediments now block the paths of many aquatic migratory species. These changes can affect the genetic structure of fish populations, as well as driving adaptive evolution to novel environmental conditions. Here, we determine the evolutionary relationships of San Francisco Bay Area steelhead/rainbow trout (Oncorhynchus mykiss) populations and show that (i) they are more closely related to native coastal steelhead than to the California Central Valley lineage, with no evidence of introgression by domesticated hatchery rainbow trout, (ii) populations above and below barriers within watersheds are each other's closest relatives, and (iii) adaptive genomic variation associated with migratory life-history traits in O...
January 2017: Evolutionary Applications
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