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https://www.readbyqxmd.com/read/29779063/development-of-sperm-vitrification-protocols-for-two-endangered-salmonid-species-the-adriatic-grayling-thymallus-thymallus-and-the-marble-trout-salmo-marmoratus
#1
Eszter Kása, Jelena Lujić, Zoran Marinović, Tímea Kollár, Gergely Bernáth, Zoltán Bokor, Béla Urbányi, Kinga Katalin Lefler, Dušan Jesenšek, Ákos Horváth
Vitrification was applied to the sperm of two endangered fish species of Soča River basin in Slovenia, the Adriatic grayling (Thymallus thymallus) and marble trout (Salmo marmoratus) following testing different cooling devices and vitrifying media. Sperm was collected, diluted in species-specific non-activating media containing cryoprotectants, and vitrified by plunging directly into liquid nitrogen without pre-cooling. Progressive motility, curvilinear velocity, and straightness of fresh and vitrified-warmed sperm were evaluated with computer-assisted sperm analysis (CASA)...
May 19, 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29778966/assessment-of-human-health-risk-associated-with-methylmercury-in-the-imported-fish-marketed-in-the-caribbean
#2
Fabio Fuentes-Gandara, Claudia Herrera-Herrera, José Pinedo-Hernández, José Marrugo-Negrete, Sergi Díez
The decline in marine and freshwaters catches in recent years in Colombia has led to a change in dietary habits, with an increase in the purchase and consumption of imported fish. This is of particular concern as fish are sometimes caught in mercury-contaminated waters, and are subsequently sold canned or uncanned. In addition, canned tuna has received little attention as it is widely assumed that concentrations are low. In this study, total mercury (THg) and methylmercury (MeHg) concentrations were evaluated in three imported fish species marketed in Colombia, Prochilodus lineatus, Prochilodus reticulatus, and Pangasianodon hypophthalmus, plus four brands of canned tuna and one of sardines...
May 17, 2018: Environmental Research
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
#3
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/29778720/inflammatory-response-following-in-vitro-exposure-to-methylmercury-with-and-without-n-3-long-chain-polyunsaturated-fatty-acids-in-peripheral-blood-mononuclear-cells-from-systemic-lupus-erythematosus-patients-compared-to-healthy-controls
#4
William Crowe, Philip J Allsopp, Jennifer F Nyland, Pamela J Magee, J J Strain, Leanne C Doherty, Gene E Watson, Elisabeth Ball, Claire Riddell, David J Armstrong, Kayla Penta, Joshua J Todd, Toni Spence, Emeir M McSorley
Methylmercury (MeHg) is a proposed environmental stimulus in systemic lupus erythematosus (SLE). Humans are primarily exposed to MeHg through fish consumption. Fish are also important sources of n-3 long chain polyunsaturated fatty acids (n-3 LCPUFA). This in vitro study investigated the inflammatory response of isolated peripheral blood mononuclear cells (PBMCs), when exposed to either MeHg alone or with added n-3 LCPUFA, from SLE patients (N = 12) compared to healthy sex matched controls (N = 12)...
May 17, 2018: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/29778716/the-hematopoietic-stem-cell-niche-what-s-so-special-about-bone
#5
REVIEW
Benjamin J Frisch
Hematopoietic stem cells (HSCs) require a supportive microenvironment to regulate their function and produce sufficient hematopoietic cells over the lifetime of an individual. With the exception of fish, all vertebrates, including mammals, maintain HSCs in a complex niche within the bone marrow. Several bone specific cellular populations have been implicated as components of the HSC niche and are part of a complex network that regulates HSC functions. However, the full extent of interactions within the HSC niche, and the role of individual cell populations remain to be fully elucidated...
May 17, 2018: Bone
https://www.readbyqxmd.com/read/29778703/sequential-injection-analysis-for-the-determination-of-fluoroquinolone-antibacterial-drug-residues-by-using-eosin-y-as-complexing-agent
#6
Kanokwan Chaiyasing, Boonsom Liawruangrath, Surapol Natakankitkul, Sakchai Satienperakul, Narabhats Rannurags, Poachanee Norfun, Saisunee Liawruangrath
A sequential injection analysis (SIA) method was developed for the rapid and sensitive determination of fluoroquinolone residues, including norfloxacin, ciprofloxacin and enrofloxacin, in fish samples. The method is based on the reaction between fluoroquinolone drug and eosin Y in Britton-Robinson buffer (pH 2.0), forming pink colored complexs with maximum absorptions at 522, 525 and 527 nm for norfloxacin, ciprofloxacin and enrofloxacin, respectively. Linearity ranges were found to be 0.05-10.0 mg L-1 (r2  = 0...
May 9, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29778682/temperature-and-hydrologic-alteration-predict-the-spread-of-invasive-largemouth-bass-micropterus-salmoides
#7
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/29778594/differetial-toxin-profiles-of-ciguatoxins-in-marine-organisms-chemistry-fate-and-global-distribution
#8
REVIEW
Lucía Soliño, Pedro Reis Costa
Ciguatoxins (CTXs) are fish metabolism products and a result of biotransformation of precursor gambiertoxins produced, in the first instance, by benthic dinoflagellates Gambierdiscus and Fukuyoa. Ciguatoxins are potent neurotoxins that selectively open voltage gated sodium channels in excitable cells causing the human food poisoning known as Ciguatera (CFP). Endemic from tropical areas in central Pacific and West Indian Ocean, and the Caribbean Sea, CTX may affects up to 500,000 people annually due to fish consumption...
May 17, 2018: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29778407/the-current-status-of-coral-reefs-and-their-vulnerability-to-climate-change-and-multiple-human-stresses-in-the-comoros-archipelago-western-indian-ocean
#9
B Cowburn, M A Samoilys, D Obura
Coral bleaching and various human stressors have degraded the coral reefs of the Comoros Archipelago in the past 40 years and rising atmospheric CO2 levels are predicted to further impact marine habitats. The condition of reefs in the Comoros is poorly known; using SCUBA based methods we surveyed reef condition and resilience to bleaching at sites in Grande Comore and Mohéli in 2010 and 2016. The condition of reefs was highly variable, with a range in live coral cover between 6% and 60% and target fishery species biomass between 20 and 500 kg per ha...
May 16, 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29778226/imbalanced-nutrient-regimes-increase-prymnesium-parvum-resilience-to-herbicide-exposure
#10
Stacie L Flood, JoAnn M Burkholder
The toxigenic haptophyte Prymnesium parvum is a mixotrophic phytoplankter with an extensive historic record of forming nearly monospecific, high-biomass, ecosystem-disrupting blooms, and it has been responsible for major fish kills in brackish waters and aquaculture facilities in many regions of the world. Little is known about how this species responds to commonly occurring environmental contaminants, or how nutrient (nitrogen, phosphorus) pollution may interact with environmentally relevant pesticide exposures to affect this harmful algal species...
May 2018: Harmful Algae
https://www.readbyqxmd.com/read/29778225/identification-growth-and-toxicity-assessment-of-coolia-meunier-dinophyceae-from-nova-scotia-canada
#11
Nancy I Lewis, Jennifer L Wolny, John Claude Achenbach, Lee Ellis, Joseph S Pitula, Cheryl Rafuse, Detbra S Rosales, Pearse McCarron
Benthic dinoflagellates of the toxigenic genus Coolia Meunier (Dinophyceae) are known to have a global distribution in both tropical and temperate waters. The type species, C. monotis, has been reported from the Mediterranean Sea, the NE Atlantic and from Rhode Island, USA in the NW Atlantic, whereas other species in the genus have been reported from tropical locations. Coolia cells were observed in algal drift samples collected at seven sites in Nova Scotia, Canada. Clonal isolates were established from four of these locations and identified with light and scanning electron microscopy, then confirmed with genetic sequencing to be C...
May 2018: Harmful Algae
https://www.readbyqxmd.com/read/29778221/morphology-and-toxicity-of-pseudo-nitzschia-species-in-the-northern-benguela-upwelling-system
#12
Deon C Louw, Gregory J Doucette, Nina Lundholm
The Benguela upwelling system, considered the world's most productive marine ecosystem, has a long record of potentially toxic diatoms belonging to the genus Pseudo-nitzschia. Species of Pseudo-nitzschia were reported as early as 1936 from the northern Benguela upwelling system (nBUS). For the current study, long-term phytoplankton monitoring data (2004-2011) for the Namibian coast were analysed to examine inshore and offshore temporal distribution of Pseudo-nitzschia species, their diversity and ultrastructure...
May 2018: Harmful Algae
https://www.readbyqxmd.com/read/29778081/molecular-aspect-of-silver-nanoparticles-regulated-embryonic-development-in-zebrafish-danio-rerio-by-oct-4-expression
#13
Biplab Sarkar, Suresh K Verma, Javed Akhtar, Surya Prakash Netam, Sanjay Kr Gupta, Pritam Kumar Panda, Koel Mukherjee
With the enhancement of commercial manifestation of silver nanoparticles, concerned has risen on their accumulation in aquatic system and consequent effects on fish development and metabolism. In this study, experiments were conducted to assess the impacts of silver nanoparticles on early life cycles of fish considering Zebrafish (Danio rerio) as experimental model. Silver nanoparticles were synthesized through chemical reduction method and characterized through UV-visible spectroscopy, dynamic light scattering (DLS), and HR-TEM...
May 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778079/advances-in-understanding-the-response-of-fish-to-linear-alcohols-in-the-environment
#14
Scott E Belanger, Jane M Rawlings, Ricky Stackhouse
Short to long chain alcohols have a range of ecotoxicity to aquatic life driven by hydrophobic interactions with biological membranes. Carbon chain length and octanol:water partitioning coefficients are surrogates for hydrophobicity and strongly relate to aquatic toxicity. In these investigations, the toxicity of ethanol to 1-n-dodecanol to juvenile fish in standard acute toxicity tests is reviewed. Toxicity tests employing fish embryos (zebrafish Danio rerio and fathead minnow Pimephales promelas) in the Fish Embryo Test (OECD 236) format were conducted from C2 to C10 to compare against standard juvenile fish toxicity...
April 25, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778078/an-effective-and-low-cost-carbon-based-clean-up-method-for-pcdd-fs-and-pcbs-analysis-in-food
#15
Kleopatra Kedikoglou, Danae Costopoulou, Irene Vassiliadou, Evangelos Bakeas, Leondios Leondiadis
Sample preparation is of critical importance in dioxin analysis of food and feed samples. It is a complex procedure that includes lipid extraction followed by the application of chromatographic separation techniques, aiming in removing undesirable interferences from the matrix. The separation of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) from polychlorinated biphenyls (PCBs) is achieved by carbon-based materials which should have high fat capacity in order to be suitable for lipid-containing matrices...
May 7, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778067/succession-of-bacterial-and-fungal-communities-within-biofilms-of-a-chlorinated-drinking-water-distribution-system
#16
I Douterelo, K E Fish, J B Boxall
Understanding the temporal dynamics of multi-species biofilms in Drinking Water Distribution Systems (DWDS) is essential to ensure safe, high quality water reaches consumers after it passes through these high surface area reactors. This research studied the succession characteristics of fungal and bacterial communities under controlled environmental conditions fully representative of operational DWDS. Microbial communities were observed to increase in complexity after one month of biofilm development but they did not reach stability after three months...
May 3, 2018: Water Research
https://www.readbyqxmd.com/read/29778059/tracking-pollutants-in-dietary-fish-oil-from-ocean-to-table
#17
Sheng-Xiang Sun, Xue-Ming Hua, Yun-Yun Deng, Yun-Ni Zhang, Jia-Min Li, Zhao Wu, Samwel Mchele Limbu, Da-Sheng Lu, Hao-Wen Yin, Guo-Quan Wang, Rune Waagbø, Frøyland Livar, Mei-Ling Zhang, Zhen-Yu Du
Dietary fish oil used in aquafeed transfers marine pollutants to farmed fish. However, the entire transfer route of marine pollutants in dietary fish oil from ocean to table fish has not been tracked quantitatively. To track the entire transfer route of marine pollutants from wild fish to farmed fish through dietary fish oil and evaluate the related human health risks, we obtained crude and refined fish oils originating from the same batch of wild ocean anchovy and prepared fish oil-containing purified aquafeeds to feed omnivorous lean Nile tilapia and carnivorous fatty yellow catfish for eight weeks...
May 16, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29777921/comparison-of-heavy-metals-parasites-and-histopathology-in-sculpins-myoxocephalus-spp-from-two-sites-at-a-lead-zinc-mine-in-north-east-greenland
#18
Rasmus Dyrmose Nørregaard, Mai Dang, Lis Bach, Ole Geertz-Hansen, Kim Gustavson, Peter Aastrup, Pall S Leifsson, Jens Søndergaard, Barbara Nowak, Christian Sonne
The former lead-zinc mine at Mestersvig, Greenland, continues to contaminate the surrounding environment despite its operations ceasing over 50 years ago. Elevated concentrations of heavy metals are found in water, sediment and biota in the terrestrial, freshwater and marine environments. To shed light on the present contamination and its potential effects on local fish we investigated gill and liver histology of sculpins (Myoxocephalus spp.) around the former mining area. Two species of sculpins were caught; shorthorn sculpins (M...
May 16, 2018: Environmental Research
https://www.readbyqxmd.com/read/29777853/investigation-of-the-potential-endocrine-effect-of-nitrate-in-zebrafish-danio-rerio-and-brown-trout-salmo-trutta
#19
Poul Bjerregaard, Karin Lund Kinnberg, Maria Pedersen Mose, Henrik Holbech
Nitrate has the potential to affect steroid production. Nitrate concentrations in streams in agricultural areas may exceed concentrations showing effects in laboratory studies. The effects of nitrate and/or nitrite on endocrine relevant endpoints were tested in zebrafish and brown trout. Zebrafish were exposed in two experiments to nitrate (8.8 to 89 mg NO3 - /L) and nitrite (3.6 to 19 mg NO2 - /L) during the period of sexual differentiation and sex ratios were determined. Vitellogenin concentrations were determined in the second experiment...
May 16, 2018: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29777810/bacterial-cellulose-nanofibers-as-reinforce-in-edible-fish-myofibrillar-protein-nanocomposite-films
#20
Bahareh Shabanpour, Mohsen Kazemi, Seyed Mahdi Ojagh, Parastoo Pourashouri
Bacterial cellulose nanofibers (BCNF) were employed in order to improve various properties of fish myofibrillar protein (FMP) films of Silver carp. Three different levels (2, 4 and 6%, w/w) of the nanoparticles were added to the protein polymer substrate. In this regard, it became clear that 6% BCNF-containing nanocomposites had the highest tensile strength, which was about 49% better than control samples. The nanoparticles had positive impact on the physical properties; BCNF-containing films showed a reduction in water vapor permeability, swelling and solubility indexes...
May 16, 2018: International Journal of Biological Macromolecules
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