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https://www.readbyqxmd.com/read/29778871/linking-fish-tolerance-to-water-quality-criteria-for-the-assessment-of-environmental-flows-a-practical-method-for-streamflow-regulation-and-pollution-control
#1
Changsen Zhao, Shengtian Yang, Junguo Liu, Changming Liu, Fanghua Hao, Zhonggen Wang, Huitong Zhang, Jinxi Song, Simon M Mitrovic, Richard P Lim
The survival of aquatic biota in stream ecosystems depends on both water quantity and quality, and is particularly susceptible to degraded water quality in regulated rivers. Maintenance of environmental flows (e-flows) for aquatic biota with optimum water quantity and quality is essential for sustainable ecosystem services, especially in developing regions with insufficient stream monitoring of hydrology, water quality and aquatic biota. Few e-flow methods are available that closely link aquatic biota tolerances to pollutant concentrations in a simple and practical manner...
May 15, 2018: Water Research
https://www.readbyqxmd.com/read/29778682/temperature-and-hydrologic-alteration-predict-the-spread-of-invasive-largemouth-bass-micropterus-salmoides
#2
Mi-Jung Bae, Christina A Murphy, Emili García-Berthou
The successful establishment of an aquatic invasive alien species can be mediated by a suite of environmental factors, including climate and anthropogenic disturbance. Dams and reservoirs are thought to promote freshwater fish invasion success through hydrological alterations but the evidence for their role in the global invasion of Largemouth Bass (Micropterus salmoides) on a landscape scale is limited. Here, we examine the distribution of Largemouth Bass, one of the most widely introduced fish in the world, from the Iberian Peninsula using species distribution models (SDMs), including an ensemble forecast...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29772227/evolutionary-shift-towards-lateral-line-dependent-prey-capture-behavior-in-the-blind-mexican-cavefish
#3
Evan Lloyd, Courtney Olive, Bethany A Stahl, James B Jaggard, Paloma Amaral, Erik R Duboue, Alex C Keene
Feeding strategies are dependent on multi-modal sensory processing, that integrates visual, chemosensory, and mechanoreceptive cues. In many fish species, local environments and food availability dramatically influence the evolution of sensory and morphological traits that underlie feeding. The Mexican cavefish, Astyanax mexicanus, have developed robust changes in sensory-dependent behaviors, but the impact on prey detection and feeding behavior is not known. In the absence of eyes, cavefish have evolved enhanced sensitivity of the lateral line, comprised of mechanosensory organs that sense water flow and detect prey...
May 14, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29771975/development-and-characterization-of-an-oral-multispecies-biofilm-implant-flow-chamber-model
#4
Nadine Kommerein, Katharina Doll, Nico S Stumpp, Meike Stiesch
Peri-implant infections are the most common cause of implant failure in modern dental implantology. These are caused by the formation of biofilms on the implant surface and consist of oral commensal and pathogenic bacteria, which harm adjacent soft and hard tissues and may ultimately lead to implant loss. In order to improve the clinical situation, there has to be a better understanding of biofilm formation on abiotic surfaces. Therefore, we successfully developed a system to cultivate an oral multispecies biofilm model in a flow chamber system, optimized for the evaluation of biofilm formation on solid materials by direct microscopic investigation...
2018: PloS One
https://www.readbyqxmd.com/read/29769538/organic-matter-loading-by-hippopotami-causes-subsidy-overload-resulting-in-downstream-hypoxia-and-fish-kills
#5
Christopher L Dutton, Amanda L Subalusky, Stephen K Hamilton, Emma J Rosi, David M Post
Organic matter and nutrient loading into aquatic ecosystems affects ecosystem structure and function and can result in eutrophication and hypoxia. Hypoxia is often attributed to anthropogenic pollution and is not common in unpolluted rivers. Here we show that organic matter loading from hippopotami causes the repeated occurrence of hypoxia in the Mara River, East Africa. We documented 49 high flow events over 3 years that caused dissolved oxygen decreases, including 13 events resulting in hypoxia, and 9 fish kills over 5 years...
May 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29767665/karyotype-and-genome-size-comparative-analyses-among-six-species-of-the-oilseed-bearing-genus-jatropha-euphorbiaceae
#6
Anne C T A Marinho, Santelmo Vasconcelos, Emanuelle V Vasconcelos, Daniela A Marques, Ana Maria Benko-Iseppon, Ana Christina Brasileiro-Vidal
Jatropha is an important genus of Euphorbiaceae, with species largely used for various purposes, including the manufacturing of soaps and pharmaceutical products and applications in the bioenergetic industry. Although there have been several studies focusing J. curcas in various aspects, the karyotype features of Jatropha species are poorly known. Therefore, we analyzed six Jatropha species through fluorochrome staining (CMA/DAPI), fluorescent in situ hybridization (FISH) with 5S and 45S rDNA probes and genome size estimation by flow cytometry...
May 14, 2018: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29765085/submarine-canyons-represent-an-essential-habitat-network-for-krill-hotspots-in-a-large-marine-ecosystem
#7
Jarrod A Santora, Ramona Zeno, Jeffrey G Dorman, William J Sydeman
Submarine canyon systems are ubiquitous features of marine ecosystems, known to support high levels of biodiversity. Canyons may be important to benthic-pelagic ecosystem coupling, but their role in concentrating plankton and structuring pelagic communities is not well known. We hypothesize that at the scale of a large marine ecosystem, canyons provide a critical habitat network, which maintain energy flow and trophic interactions. We evaluate canyon characteristics relative to the distribution and abundance of krill, critically important prey in the California Current Ecosystem...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29761056/pelagic-larval-duration-growth-rate-and-population-genetic-structure-of-the-tidepool-snake-moray-uropterygius-micropterus-around-the-southern-ryukyu-islands-taiwan-and-the-central-philippines
#8
Wen-Chien Huang, Jui-Tsung Chang, Chun Liao, Atsushi Tawa, Yoshiyuki Iizuka, Te-Yu Liao, Jen-Chieh Shiao
The relationships between pelagic larval duration (PLD) and geographic distribution patterns or population genetic structures of fishes remain obscure and highly variable among species. To further understand the early life history of the tidepool snake moray Uropterygius micropterus and the potential relationship between PLD and population genetic structure of this species, otolith microstructure and population genetics based on concatenated mtDNA sequence (cytochrome b and cytochrome oxidase subunit I, 1,336 bp) were analyzed for 195 specimens collected from eight locations around the southern Ryukyu Islands, Taiwan, and the central Philippines...
2018: PeerJ
https://www.readbyqxmd.com/read/29760056/effects-of-the-hippopotamus-on-the-chemistry-and-ecology-of-a-changing-watershed
#9
Keenan Stears, Douglas J McCauley, Jacques C Finlay, James Mpemba, Ian T Warrington, Benezeth M Mutayoba, Mary E Power, Todd E Dawson, Justin S Brashares
Cross-boundary transfers of nutrients can profoundly shape the ecology of recipient systems. The common hippopotamus, Hippopotamus amphibius , is a significant vector of such subsidies from terrestrial to river ecosystems. We compared river pools with high and low densities of H. amphibius to determine how H. amphibius subsidies shape the chemistry and ecology of aquatic communities. Our study watershed, like many in sub-Saharan Africa, has been severely impacted by anthropogenic water abstraction reducing dry-season flow to zero...
May 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29758861/advancing-towards-functional-environmental-flows-for-temperate-floodplain-rivers
#10
Daniel S Hayes, Julia M Brändle, Carina Seliger, Bernhard Zeiringer, Teresa Ferreira, Stefan Schmutz
Abstraction, diversion, and storage of flow alter rivers worldwide. In this context, minimum flow regulations are applied to mitigate adverse impacts and to protect affected river reaches from environmental deterioration. Mostly, however, only selected instream criteria are considered, neglecting the floodplain as an indispensable part of the fluvial ecosystem. Based on essential functions and processes of unimpaired temperate floodplain rivers, we identify fundamental principles to which we must adhere to determine truly ecologically-relevant environmental flows...
August 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29758336/grand-rounds-hepatic-manifestations-of-telomere-biology-disorders
#11
REVIEW
Mrinal M Patnaik, Patrick S Kamath, Douglas A Simonetto
Clinical Case A 51 year old Caucasian male was referred for evaluation of variceal bleeding. Laboratory tests were remarkable for mild thrombocytopenia and moderate alkaline phosphatase elevation. Synthetic liver function was well preserved. Abdominal computed tomography scan revealed moderate splenomegaly, gastric varices, and normal hepatic contour. A transjugular liver biopsy was performed revealing findings of nodular regenerative hyperplasia (NRH) with no significant fibrosis or necroinflammatory activity...
May 11, 2018: Journal of Hepatology
https://www.readbyqxmd.com/read/29751159/adverse-effects-and-immune-dysfunction-in-response-to-oral-administration-of-weathered-iranian-heavy-crude-oil-in-the-rockfish-sebastes-schlegeli
#12
Eun-Hee Lee, Moonkoo Kim, Young-Sun Moon, Un Hyuk Yim, Sung Yong Ha, Chang-Bum Jeong, Jae-Seong Lee, Jee-Hyun Jung
To demonstrate the effects of weathered crude oil residue on the immune systems of resident fish, we measured the changes in toxic chemical concentrations, apoptosis, phagocytosis, metabolism, immune-related gene expression, and cell cycle arrest in livers or kidneys for up to 96 h after the weathered Iranian heavy crude oil (WIHCO) exposure by oral gavage in juvenile rockfish Sebastes schlegeli. Parent polyaromatic hydrocarbons (PAHs) in livers increased up to 5590 ng/g after 6 h exposure and then declined rapidly within 24 h...
April 24, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29747473/supercritical-fluid-chromatography-with-photodiode-array-detection-in-the-determination-of-fat-soluble-vitamins-in-hemp-seed-oil-and-waste-fish-oil
#13
Katarzyna Tyśkiewicz, Roman Gieysztor, Izabela Maziarczyk, Paweł Hodurek, Edward Rój, Krystyna Skalicka-Woźniak
In the presented study for the first time a new, optimized, fast SFC (supercritical fluid chromatography) method was applied to separate in one run fat-soluble vitamins from waste fish oil, including cis -and tran s-retinyl palmitate, cis - and trans -retinyl acetate, retinol, α-tocopherol, β-tocopherol, γ‑tocopherol, δ-tocopherol, ergocalciferol (D₂), cholecalciferol (D₃), cis - and trans -phylloquinone (K₁) and menaquinone-4 (K₂-MK4). Vitamins were baseline separated on an Acquity UPC² (ultra performance convergence chromatography) HSS C18 SB (highly strength chemically modified silica) column within 13 min...
May 10, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29745163/-species-composition-and-distribution-patterns-of-ichthyoplankton-within-and-outside-artificial-reefs-in-qingshan-bay-qingdao-china
#14
Shu Xin Guo, Dong Kui Gao, Xiu Mei Zhang, Wen Tao Li, Pei Dong Zhang
To assess the fish attraction and shelter effects of the artificial reefs in Qingshan Bay of Qingdao, the species composition and distribution patterns of ichthyoplankton in artificial reefs were investigated using vertical and horizontal tows in 2014 and 2015. In total, 7306 fish eggs and 52 fish larvae, belonging to 4 orders, 9 families, 11 genera and 12 species, were collected during 7 cruises in spring, summer and autumn of 2014. In 2015, 10373 eggs and 159 fish larvae, belonging to 6 orders, 11 families, 14 genera and 15 species, were collected in the same period as in 2014...
June 18, 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29738551/identification-of-genetic-linkage-group-1-linked-sequences-in-japanese-eel-anguilla-japonica-by-single-chromosome-sorting-and-sequencing
#15
Kazumi Matsubara, Yuki Iwasaki, Issei Nishiki, Kazuharu Nomura, Atushi Fujiwara
Japanese eel (Anguilla japonica) constitutes one of the most important food fish in Japan; accordingly, genome sequencing and linkage mapping have been conducted for the purpose of artificial cultivation. In the next stage, integration of genomic sequences within linkage groups (LG) is required to construct higher-resolution genetic markers for quantitative trait loci mapping and selective breeding of beneficial traits in farming. In order to identify LG1-linked scaffolds from the draft genome assembly (323,776 scaffolds) reported previously, we attempted to isolate chromosomes corresponding to LG1 by flow sorting and subsequent analyses...
2018: PloS One
https://www.readbyqxmd.com/read/29734597/longitudinal-training-dams-mitigate-effects-of-shipping-on-environmental-conditions-and-fish-density-in-the-littoral-zones-of-the-river-rhine
#16
F P L Collas, A D Buijse, L van den Heuvel, N van Kessel, M M Schoor, H Eerden, R S E W Leuven
The stability of habitat conditions in littoral zones of navigated rivers is strongly affected by shipping induced waves and water displacements. In particular, the increase of variability in flow conditions diminishes the suitability of these habitats for juvenile fishes. Recently, a novel ecosystem based river management strategy has resulted in the replacement of traditional river training structures (i.e., groynes) by longitudinal training dams (LTDs), and the creation of shore channels in the river Waal, the main, free-flowing and intensively navigated distributary of the river Rhine in the Netherlands...
April 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29729184/fish-predators-reduce-kelp-frond-loss-via-a-trait-mediated-trophic-cascade
#17
Miranda B Haggerty, Todd W Anderson, Jeremy D Long
Although trophic cascades were originally believed to be driven only by predators eating prey, there is mounting evidence that such cascades can be generated in large part via non-consumptive effects. This is especially important in cascades affecting habitat-forming foundation species that in turn, influence associated communities. Here, we use laboratory and field experiments to identify a trait-mediated indirect interaction between predators and an abundant kelp in a marine temperate reef system. Predation risk from a microcarnivorous fish, the señorita, suppressed grazing by the host-specific seaweed limpet, which in turn, influenced frond loss of the habitat-forming feather boa kelp...
May 5, 2018: Ecology
https://www.readbyqxmd.com/read/29727986/towards-sustainable-mobile-systems-configurations-application-to-a-tuna-purse-seiner
#18
A García Rellán, C Vázquez Brea, P M Bello Bugallo
Fishing is one of the most important marine activities. It contributes to both overfishing and marine pollution, the two main threats to the ocean environment. In this context, the aim of this work is to investigate and validate methodologies for the identification of more sustainable operating configurations for a tuna purse seiner. The proposed methodology is based on a previous one applied to secondary industrial systems, taking into account the Integrated Pollution Prevention and Control focus, developed for the most potentially industrial polluting sources...
August 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29721289/fish-assemblage-changes-over-half-a-century-in-the-yellow-river-china
#19
Jia Yan Xie, Wen Jia Tang, Yu Hui Yang
Riverine environments have been threatened by anthropogenic perturbations worldwide, whereby their fish assemblages have been modified by habitat changes and nonendemic species invasions. We assessed changes in fish assemblages by comparing the species presence in historical and contemporary fish data in the Yellow River from 1965 to 2015. The temporal change in species assemblages was found with increased nonendemic species and fewer natives. Fish species richness of the river declined 35.4% over the past fifty years...
April 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29720492/sustained-clonal-hematopoiesis-by-hla-lacking-hematopoietic-stem-cells-without-driver-mutations-in-aplastic-anemia
#20
Tatsuya Imi, Takamasa Katagiri, Kazuyoshi Hosomichi, Yoshitaka Zaimoku, Viet Hoang Nguyen, Noriharu Nakagawa, Atsushi Tajima, Tetsuichi Yoshizato, Seishi Ogawa, Shinji Nakao
Clonal hematopoiesis by hematopoietic stem progenitor cells (HSPCs) that lack an HLA class I allele (HLA- HSPCs) is common in patients with acquired aplastic anemia (AA); however, it remains unknown whether the cytotoxic T lymphocyte (CTL) attack that allows for survival of HLA- HSPCs is directed at nonmutated HSPCs or HSPCs with somatic mutations or how escaped HLA- HSPC clones support sustained hematopoiesis. We investigated the presence of somatic mutations in HLA- granulocytes obtained from 15 AA patients in long-term remission (median, 13 years; range, 2-30 years)...
May 8, 2018: Blood Advances
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