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https://www.readbyqxmd.com/read/28329005/rethinking-the-influence-of-hydroelectric-development-on-gene-flow-in-a-long-lived-fish-the-lake-sturgeon-acipenser-fulvescens
#1
Craig A McDougall, Amy B Welsh, Thierry Gosselin, W Gary Anderson, Patrick A Nelson
Many hydroelectric dams have been in place for 50 - >100 years, which for most fish species means that enough generations have passed for fragmentation induced divergence to have accumulated. However, for long-lived species such as Lake Sturgeon, Acipenser fulvescens, it should be possible to discriminate between historical population structuring and contemporary gene flow and improve the broader understanding of anthropogenic influence. On the Winnipeg River, Manitoba, two hypotheses were tested: 1) Measureable quantities of former reservoir dwelling Lake Sturgeon now reside downstream of the Slave Falls Generating Station, and 2) genetically differentiated populations of Lake Sturgeon occur upstream and downstream, a result of historical structuring...
2017: PloS One
https://www.readbyqxmd.com/read/28323368/biotic-interactions-modify-multiple-stressor-effects-on-juvenile-brown-trout-in-an-experimental-stream-food-web
#2
Andreas Bruder, Romana K Salis, Peter E Jones, Christoph D Matthaei
Agricultural land use results in multiple stressors affecting stream ecosystems. Flow reduction due to water abstraction, elevated levels of nutrients and chemical contaminants are common agricultural stressors worldwide. Concurrently, stream ecosystems are also increasingly affected by climate change. Interactions among multiple co-occurring stressors result in biological responses that cannot be predicted from single-stressor effects (i.e. synergisms and antagonisms). At the ecosystem level, multiple-stressor effects can be further modified by biotic interactions (e...
March 21, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28319370/uptake-and-disposition-of-select-pharmaceuticals-by-bluegill-exposed-at-constant-concentrations-in-a-flow-through-aquatic-exposure-system
#3
Jian-Liang Zhao, Edward T Furlong, Heiko L Schoenfuss, Dana Ward Kolpin, Kyle L Bird, David J Feifarek, Eric A Schwab, Guang-Guo Ying
The increasing use of pharmaceuticals has led to their subsequent input into and release from wastewater treatment plants, with corresponding discharge into surface waters that may subsequently exert adverse effects upon aquatic organisms. Although the distribution of pharmaceuticals in surface water has been extensively studied, the details of uptake, internal distribution, and kinetic processing of pharmaceuticals in exposed fish have received less attention. For this research, we investigated the uptake, disposition, and toxicokinetics of five pharmaceuticals (diclofenac, methocarbamol, rosuvastatin, sulfamethoxazole, and temazepam) in bluegill sunfish (Lepomis macrochirus) exposed to environmentally relevant concentrations (1,000-4,000 ng L-1) in a flow-through exposure system...
March 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28303746/novel-design-and-optimisation-of-a-nitritation-anammox-setup-for-ammonium-removal-from-filtrate-of-digested-sludge
#4
Yury Nikolaev, Anna Kallistova, Marina Kevbrina, Alexander Dorofeev, Anton Agarev, Andrey Mardanov, Nikolay Ravin, Michail Kozlov, Nikolay Pimenov
Although anammox process is extensively applied to the treatment of high-strength ammonium wastewater, new technical solutions overcoming the operational difficulties remain an important task. In this study, an innovative design of anammox-based setup was employed to improve sludge settling under high ammonium load (up to 1000 mg NH4-N/l/d). The setup treated the filtrate of digested sludge and included a completely mixed constant flow bioreactor with suspended and immobilised activated sludge. Suspended sludge was recycled via a settler...
March 17, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28298621/silencing-nc886-a-non-coding-rna-induces-apoptosis-of-human-endometrial-cancer-cells-1a-in-vitro
#5
Zhuoying Hu, Hongyu Zhang, Liangdan Tang, Meng Lou, Yanqing Geng
BACKGROUND The role that nc886, a non-coding microRNA, plays in human endometrial cancer is unknown. The present study aimed to describe the functional role of nc886 in human endometrial cancer-1A (HEC-1A) cell line, which may provide another target for human endometrial cancer treatment. MATERIAL AND METHODS The expression levels of nv886 in normal human endometrial tissue and the early phase and late phase of human endometrial cancer tissues were determined and compared by fluorescence in situ hybridization (FISH)...
March 16, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28283799/encystment-of-parasitic-freshwater-pearl-mussel-margaritifera-margaritifera-larvae-coincides-with-increased-metabolic-rate-and-haematocrit-in-juvenile-brown-trout-salmo-trutta
#6
Karl Filipsson, Jeroen Brijs, Joacim Näslund, Niklas Wengström, Marie Adamsson, Libor Závorka, E Martin Österling, Johan Höjesjö
Gill parasites on fish are likely to negatively influence their host by inhibiting respiration, oxygen transport capacity and overall fitness. The glochidia larvae of the endangered freshwater pearl mussel (FPM, Margaritifera margaritifera (Linnaeus, 1758)) are obligate parasites on the gills of juvenile salmonid fish. We investigated the effects of FPM glochidia encystment on the metabolism and haematology of brown trout (Salmo trutta Linnaeus, 1758). Specifically, we measured whole-animal oxygen uptake rates at rest and following an exhaustive exercise protocol using intermittent flow-through respirometry, as well as haematocrit, in infested and uninfested trout...
March 10, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28282621/uranium-238-u-induced-ros-and-cell-cycle-perturbations-antioxidant-responses-and-erythrocyte-nuclear-abnormalities-in-the-freshwater-iridescent-shark-fish-pangasius-sutchi
#7
Sathesh Kumar Annamalai, Kantha Deivi Arunachalam
The strategic plan of this study is to analyze any possible radiological impact on aquatic organisms from forthcoming uranium mining facilities around the Nagarjuna Sagar Dam in the future. The predominantly consumed and dominant fish species Pangasius sutchi, which is available year-round at Nagarjuna Sagar Dam, was selected for the study. To comprehend the outcome and to understand the mode of action of (238)U, the fish species Pangasius sutchi was exposed to ¼ and ½ of the LC50 doses of waterborne (238)U in a static system in duplicate for 21 days...
March 2, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28278695/dna-barcoding-and-genetic-diversity-analyses-of-fishes-of-kaladan-river-of-indo-myanmar-biodiversity-hotspot
#8
Anindya Sundar Barman, Mamta Singh, Pramod Kumar Pandey
Species are considered as a fundamental unit of biodiversity. Therefore, the prerequisite for biodiversity management and conservation is to know the number of species one is dealing with. Consequently, the need of the present study was conceptualized, which dealt with the comprehensive molecular appraisal of Kaladan's Fish fauna. A total of 291 specimens representing 49 species, 28 genera, 11 families, and 4 orders, were collected from 11 sampling stations situated along the main Kaladan River and its four major tributaries, i...
February 16, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28273597/does-exposure-to-domestic-wastewater-effluent-including-steroid-estrogens-harm-fish-populations-in-the-uk
#9
Andrew C Johnson, Yihong Chen
Historic fisheries data collected from locations across the UK over several years were compared with predicted estrogen exposure derived from the resident human population. This estrogen exposure could be viewed as a proxy for general sewage (wastewater) exposure. With the assistance of the Environment Agency in the UK, fisheries abundance data for Rutilis rutilis (roach), Alburnus alburnus (bleak), Leuciscus leuciscus (dace) and Perca fluviatilis (perch) from 38 separate sites collected over 7 to 17year periods were retrieved...
March 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28262802/population-genomics-of-an-endemic-mediterranean-fish-differentiation-by-fine-scale-dispersal-and-adaptation
#10
Carlos Carreras, Víctor Ordóñez, Lorenzo Zane, Claudia Kruschel, Ina Nasto, Enrique Macpherson, Marta Pascual
The assessment of the genetic structuring of biodiversity is crucial for management and conservation. For species with large effective population sizes a low number of markers may fail to identify population structure. A solution of this shortcoming can be high-throughput sequencing that allows genotyping thousands of markers on a genome-wide approach while facilitating the detection of genetic structuring shaped by selection. We used Genotyping-by-Sequencing (GBS) on 176 individuals of the endemic East Atlantic peacock wrasse (Symphodus tinca), from 6 locations in the Adriatic and Ionian seas...
March 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28250437/medaka-insulin-like-growth-factor-2-supports-self-renewal-of-the-embryonic-stem-cell-line-and-blastomeres-in-vitro
#11
Yongming Yuan, Yunhan Hong
Insulin-like growth factors (IGFs) regulate diverse processes including energy metabolism, cell proliferation and embryonic development. They activate the IGF signaling pathway via binding to cell surface receptors. Here we report an essential role of IGF2 in maintaining the pluripotency of embryonic stem (ES) cell from medaka (Oryzias latipes). The medaka igf2 gene was cloned for prokaryotically expression of IGF2 ligand and green fluorescent protein-tagged IGF2 namely IGF2:GFP. With flow cytometry analysis, we demonstrated that the IGF2:GFP can bind to the cultured ES cells from medaka and zebrafish respectively...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28249740/bridging-science-and-traditional-knowledge-to-assess-cumulative-impacts-of-stressors-on-ecosystem-health
#12
Chrystal S Mantyka-Pringle, Timothy D Jardine, Lori Bradford, Lalita Bharadwaj, Andrew P Kythreotis, Jennifer Fresque-Baxter, Erin Kelly, Gila Somers, Lorne E Doig, Paul D Jones, Karl-Erich Lindenschmidt
Cumulative environmental impacts driven by anthropogenic stressors lead to disproportionate effects on indigenous communities that are reliant on land and water resources. Understanding and counteracting these effects requires knowledge from multiple sources. Yet the combined use of Traditional Knowledge (TK) and Scientific Knowledge (SK) has both technical and philosophical hurdles to overcome, and suffers from inherently imbalanced power dynamics that can disfavour the very communities it intends to benefit...
February 26, 2017: Environment International
https://www.readbyqxmd.com/read/28246045/characterisation-of-the-transcriptome-of-male-and-female-wild-type-guppy-brains-with-rna-seq-and-consequences-of-exposure-to-the-pharmaceutical-pollutant-17%C3%AE-ethinyl-estradiol
#13
Minna Saaristo, Bob B M Wong, Laura Mincarelli, Allison Craig, Christopher P Johnstone, Mayumi Allinson, Kai Lindström, John A Craft
Waterways are increasingly being contaminated by chemical compounds that can disrupt the endocrinology of organisms. One such compound is 17α-ethinyl estradiol (EE2), a synthetic estrogen used in the contraceptive pill. Despite considerable research interest in the effects of EE2 on reproduction and gene expression, surprisingly, only a few studies have capitalised on technologies, such as next-generation sequencing (NGS), to uncover the molecular pathways related to EE2 exposure. Accordingly, using high-throughput sequencing technologies, the aim of our study was to explore the effects of EE2 on brain transcriptome in wild-type male and female guppy (Poecilia reticulata)...
February 16, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28224631/development-and-application-of-monoclonal-antibodies-against-igm-of-black-rockfish-sebastes-schlegeli
#14
W Zhang, X Q Tang, X Z Sheng, J Xing, W B Zhan
Monoclonal antibodies (mAbs) against black rockfish Sebastes schlegeli serum immunoglobulin M (IgM) were developed, which showed a specific reaction with the heavy chain of S. schlegeli IgM in Western blotting and with surface IgM positive (sIgM(+) ) lymphocytes in indirect immunofluorescence. mAb 2A6 was employed to investigate the antibody and sIgM(+) lymphocyte responses of S. schlegeli injected with inactivated Edwardsiella tarda, by ELISA and flow cytometry. Compared with controls, the level of specific antibodies and the percentage of sIgM(+) lymphocytes both increased in the immunized fish and simultaneously reached their peaks at day 35 after immunization...
February 21, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28223437/long-term-administration-of-eicosapentaenoic-acid-improves-post-myocardial-infarction-cardiac-remodeling-in-mice-by-regulating-macrophage-polarization
#15
Masayuki Takamura, Keisuke Kurokawa, Hiroshi Ootsuji, Oto Inoue, Hikari Okada, Ayano Nomura, Shuichi Kaneko, Soichiro Usui
BACKGROUND: Consumption of n-3 fatty acids reduces the incidence of cardiovascular mortality in populations that consume diets rich in fish oil. Eicosapentaenoic acid (EPA) is an n-3 fatty acid known to reduce the frequency of nonfatal coronary events; however, the frequency of mortality after myocardial infarction (MI) is not reduced. The aims of this study were to determine whether long-term administration of EPA regulated cardiac remodeling after MI and to elucidate the underlying therapeutic mechanisms of EPA...
February 21, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28220758/a-bio-inspired-electrocommunication-system-for-small-underwater-robots
#16
Wei Wang, Jindong Liu, Guangming Xie, Li Wen, Jianwei Zhang
Weakly electric fishes (Gymnotid and Mormyrid) use an electric field to communicate efficiently (termed electrocommunication) in the turbid waters of confined spaces where other communication modalities fail. Inspired by this biological phenomenon, we design an artificial electrocommunication system for small underwater robots and explore the capabilities of such an underwater robotic communication system. An analytical model for electrocommunication is derived to predict the effect of the key parameters such as electrode distance and emitter current of the system on the communication performance...
February 21, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28214119/persistent-organic-pollutants-in-the-olifants-river-basin-south-africa-bioaccumulation-and-trophic-transfer-through-a-subtropical-aquatic-food-web
#17
Vera Verhaert, Nadine Newmark, Wendy D'Hollander, Adrian Covaci, Wynand Vlok, Victor Wepener, Abraham Addo-Bediako, Antoinette Jooste, Johannes Teuchies, Ronny Blust, Lieven Bervoets
This study investigates the trophic transfer of persistent organic pollutants (POPs: PCBs, PBDEs, OCPs and PFASs) in the subtropical aquatic ecosystem of the Olifants River Basin (South Africa) by means of trophic magnification factors (TMFs). Relative trophic levels were determined by stable isotope analysis. POP levels in surface water, sediment and biota were low. Only ∑DDTs levels in fish muscle (<LOQ-61ng/g ww) were comparable or higher than values from other temperate and tropical regions. Significant positive relationships between relative trophic level and PCB, DDT and HCH concentrations were observed so trophic levels play an important role in the movement of contaminants through the food web...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28212806/clonal-evolution-as-detected-by-interphase-fluorescence-in-situ-hybridization-is-associated-with-worse-overall-survival-in-a-population-based-analysis-of-patients-with-chronic-lymphocytic-leukemia-in-british-columbia-canada
#18
Steven J Huang, Krystal Bergin, Adam C Smith, Alina S Gerrie, Helene Bruyere, Chinmay B Dalal, Daniele K Sugioka, Monica Hrynchak, Khaled M Ramadan, Aly Karsan, Tanya L Gillan, Cynthia L Toze
This study evaluates prognostic markers as predictors of clonal evolution (CE) and assesses the impact of CE on overall survival (OS) in a population-based cohort of 159 consecutive eligible patients with chronic lymphocytic leukemia (CLL) obtained from the British Columbia Provincial CLL Database. CE was detected by interphase fluorescence in situ hybridization (FISH) in 34/159 patients (21%) with 65% of CE patients acquiring deletion 17p or 11q. CD38 positive status (≥30%) on flow cytometry predicted 2...
January 2017: Cancer Genetics
https://www.readbyqxmd.com/read/28211194/a-field-reciprocal-transplant-experiment-reveals-asymmetric-costs-of-migration-between-lake-and-river-ecotypes-of-three-spined-sticklebacks-gasterosteus-aculeatus
#19
Joshka Kaufmann, Tobias L Lenz, Martin Kalbe, Manfred Milinski, Christophe Eizaguirre
Theory of local adaptation predicts that non-adapted migrants will suffer increased costs compared to local residents. Ultimately this process can result in the reduction of gene flow and culminate in speciation. Here, we experimentally investigated the relative fitness of migrants in foreign habitats, focusing on diverging lake and river ecotypes of three-spined sticklebacks. A reciprocal transplant experiment performed in the field revealed asymmetric costs of migration: while mortality of river fish was increased under lake conditions, lake migrants suffered from reduced growth relative to river residents...
February 17, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28209527/exploring-deformable-particles-in-vascular-targeted-drug-delivery-softer-is-only-sometimes-better
#20
Margaret B Fish, Catherine A Fromen, Genesis Lopez-Cazares, Alexander W Golinski, Timothy F Scott, Reheman Adili, Michael Holinstat, Omolola Eniola-Adefeso
The ability of vascular-targeted drug carriers (VTCs) to localize and bind to a targeted, diseased endothelium determines their overall clinical utility. Here, we investigate how particle modulus and size determine adhesion of VTCs to the vascular wall under physiological blood flow conditions. In general, deformable microparticles (MPs) outperformed nanoparticles (NPs) in all experimental conditions tested. Our results indicate that MP modulus enhances particle adhesion in a shear-dependent manner. In low shear human blood flow profiles in vitro, low modulus particles showed favorable adhesion, while at high shear, rigid particles showed superior adhesion...
April 2017: Biomaterials
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