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https://www.readbyqxmd.com/read/28439534/the-arctic-ocean-as-a-dead-end-for-floating-plastics-in-the-north-atlantic-branch-of-the-thermohaline-circulation
#1
Andrés Cózar, Elisa Martí, Carlos M Duarte, Juan García-de-Lomas, Erik van Sebille, Thomas J Ballatore, Victor M Eguíluz, J Ignacio González-Gordillo, Maria L Pedrotti, Fidel Echevarría, Romain Troublè, Xabier Irigoien
The subtropical ocean gyres are recognized as great marine accummulation zones of floating plastic debris; however, the possibility of plastic accumulation at polar latitudes has been overlooked because of the lack of nearby pollution sources. In the present study, the Arctic Ocean was extensively sampled for floating plastic debris from the Tara Oceans circumpolar expedition. Although plastic debris was scarce or absent in most of the Arctic waters, it reached high concentrations (hundreds of thousands of pieces per square kilometer) in the northernmost and easternmost areas of the Greenland and Barents seas...
April 2017: Science Advances
https://www.readbyqxmd.com/read/28395870/dongsha-atoll-a-potential-thermal-refuge-for-reef-building-corals-in-the-south-china-sea
#2
Konstantin S Tkachenko, Keryea Soong
Dongsha Atoll (also known as the Pratas Islands), the northernmost atoll in the South China Sea, experiences two contrasting physical phenomena: repetitive anomalies of the sea surface temperature exceeding the coral bleaching threshold and regular effects of the world's strongest internal waves resulting in the rhythmic upwelling of cold deep waters at the outer reef slopes of the atoll. This unique combination may result in significant differences in coral species composition and structure between the lagoon and forereef...
April 4, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28331802/molecular-epidemiology-and-pathology-of-spirorchiid-infection-in-green-sea-turtles-chelonia-mydas
#3
Phoebe A Chapman, Helen Owen, Mark Flint, Ricardo J Soares Magalhães, Rebecca J Traub, Thomas H Cribb, Myat T Kyaw-Tanner, Paul C Mills
Spirorchiid blood fluke infections affect endangered turtle populations globally, and are reported as a common cause of mortality in Queensland green sea turtles. Both the flukes and their ova are pathogenic and can contribute to the stranding or death of their host. Of particular interest are ova-associated brain lesions, which have been associated with host neurological deficits. Accurate estimations of disease frequency and the relative effect of infection relating to different spirorchiid species are made difficult by challenges in morphological identification of adults of some genera, and a lack of species-level identifying features for ova...
April 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28323589/preventing-high-altitude-cerebral-edema-in-rats-with-repurposed-anti-angiogenesis-pharmacotherapy
#4
Samantha Tarshis, Joanne Maltzahn, Zoe Loomis, David C Irwin
BACKGROUND: High altitude cerebral edema (HACE) is a fulminant, deadly, and yet still unpredictable brain disease. A new prophylactic treatment for HACE and its predecessor, acute mountain sickness (AMS), needs to be developed without the contraindications or adverse effect profiles of acetazolamide and dexamethasone. Since neovascularization signals are likely key contributors to HACE/AMS, our approach was to examine already existing anti-angiogenic drugs to inhibit potential initiating HACE pathway(s)...
December 1, 2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28286714/true-s-beaked-whale-mesoplodon-mirus-in-macaronesia
#5
Natacha Aguilar de Soto, Vidal Martín, Monica Silva, Roland Edler, Cristel Reyes, Manuel Carrillo, Agustina Schiavi, Talia Morales, Belen García-Ovide, Anna Sanchez-Mora, Nerea Garcia-Tavero, Lisa Steiner, Michael Scheer, Roland Gockel, Dylan Walker, Enrico Villa, Petra Szlama, Ida K Eriksson, Marisa Tejedor, Monica Perez-Gil, João Quaresma, Wojtek Bachara, Emma Carroll
The True's beaked whale (Mesoplodon mirus, True 1913) is a poorly known member of the Ziphiidae family. Its distribution in the northern hemisphere is thought to be restricted to the temperate or warm temperate waters of the North Atlantic, while a few stranding records from the southern hemisphere suggest a wider and antitropical distribution, extending to waters from the Atlantic coast of Brazil to South Africa, Mozambique, Australia and the Tasman Sea coast of New Zealand. This paper (i) reports the first molecular confirmation of the occurrence of the True's beaked whale at the southern limit of its distribution recorded in the northeast Atlantic: the Azores and Canary Islands (macaronesian ecoregion); (ii) describes a new colouration for this species using evidence from a whale with molecular species confirmation; and (iii) contributes to the sparse worldwide database of live sightings, including the first underwater video recording of this species and close images of a calf...
2017: PeerJ
https://www.readbyqxmd.com/read/28177288/novel-urease-negative-helicobacter-sp-h-enhydrae-sp-nov-isolated-from-inflamed-gastric-tissue-of-southern-sea-otters
#6
Zeli Shen, Francesca Batac, Anthony Mannion, Melissa A Miller, Vasudevan Bakthavatchalu, Calvin Ho, Sean Manning, Bruce J Paster, James G Fox
A total of 31 sea otters Enhydra lutris nereis found dead or moribund (and then euthanized) were necropsied in California, USA. Stomach biopsies were collected and transected with equal portions frozen or placed in formalin and analyzed histologically and screened for Helicobacter spp. in gastric tissue. Helicobacter spp. were isolated from 9 sea otters (29%); 58% (18 of 31) animals were positive for helicobacter by PCR. The Helicobacter sp. was catalase- and oxidase-positive and urease-negative. By electron microscopy, the Helicobacter sp...
February 8, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28139956/bacterial-microbiota-in-harbor-seals-phoca-vitulina-from-the-north-sea-of-schleswig-holstein-germany-around-the-time-of-morbillivirus-and-influenza-epidemics
#7
Ursula Siebert, Marion Rademaker, Sophie A Ulrich, Peter Wohlsein, Katrin Ronnenberg, Ellen Prenger-Berninghoff
We present microbiologic findings in harbor seal (phoca; Phoca vitulina ) carcasses collected from the North Sea of Schleswig-Holstein, Germany, 1996-2014, and interpret results in relation to potential variations caused by phocine distemper virus and influenza A virus mass mortalities. We conducted microbiologic investigations on 2,124 tissue samples from lung, liver, kidney, spleen, intestine, and mesenteric lymph nodes from 549 dead harbor seals of the German North Sea. A large variety of bacteria, including potentially pathogenic species such as Bordetella bronchiseptica , Brucella spp...
April 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28125589/habitat-use-and-spatial-variability-of-hawkfishes-with-a-focus-on-colour-polymorphism-in-paracirrhites-forsteri
#8
Darren J Coker, Veronica Chaidez, Michael L Berumen
Identifying relationships between fishes and their environment is an integral part of understanding coral reef ecosystems. However, this information is lacking for many species, particularly in understudied and remote regions. With coral reefs continuing to face environmental pressures, insight into abundance and distribution patterns along with resource use of fish communities will aid in advancing our ecological understanding and management processes. Based on ecological surveys of hawkfish assemblages (Family: Cirrhitidae) in the Red Sea, we reveal distinct patterns in the distribution and abundance across the continental shelf, wave exposure, and with depth, particularly in the four colour morphs of Paracirrhites forsteri...
2017: PloS One
https://www.readbyqxmd.com/read/28075017/intrapopulation-variability-in-the-timing-of-ontogenetic-habitat-shifts-in-sea-turtles-revealed-using-%C3%AE-15-n-values-from-bone-growth-rings
#9
Calandra N Turner Tomaszewicz, Jeffrey A Seminoff, S Hoyt Peckham, Larisa Avens, Carolyn M Kurle
Determining location and timing of ontogenetic shifts in the habitat use of highly migratory species, along with possible intrapopulation variation in these shifts, is essential for understanding mechanisms driving alternate life histories and assessing overall population trends. Measuring variations in multi-year habitat-use patterns is especially difficult for remote oceanic species. To investigate the potential for differential habitat use among migratory marine vertebrates, we measured the naturally occurring stable nitrogen isotope (δ(15) N) patterns that differentiate distinct ocean regions to create a 'regional isotope characterization', analysed the δ(15) N values from annual bone growth layer rings from dead-stranded animals, and then combined the bone and regional isotope data to track individual animal movement patterns over multiple years...
May 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28073400/haloactinomyces-albus-gen-nov-sp-nov-isolated-from-dead-sea
#10
Hangxian Lai, Yingying Jiang, Xiu Chen, Qinyuan Li, Chenglin Jiang, Yi Jiang, Xiaomin Wei
A novel halophilic, filamentous actinomycete strain, designated AFM 10258T, was isolated from a sediment sample collected from Dead Sea of Israel. The isolate grew with 10-35% NaCl and did not grow without NaCl. The isolate formed white aerial mycelium and long spore chains, and two spores were separated by sterile mycelium. The spores were non-motile, spherical and rugose-surfaced. The isolate contained meso-diaminopimelic acid as the diagnostic diamino acid and galactose and arabinose as the major whole-cell sugars...
January 10, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28070088/population-and-growth-related-differences-in-helminthic-fauna-of-finless-porpoises-neophocaena-asiaeorientalis-in-five-japanese-populations
#11
Akira Shiozaki, Masao Amano
A survey of helminths and ectoparasites, including epizoits, was conducted in narrow-ridged finless porpoises (Neophocaena asiaeorientalis) from Japanese five populations using dead stranded or incidentally caught animals. In total, 13 helminth species were found (6 nematodes, 4 trematodes, 2 cestodes and 1 acanthocephalan) in 137 porpoises. A new location record of Stenurus nanjingensis and a new host record of Tetrabothrius sp. were obtained. Eight species of helminth were considered common in the Japanese populations of the finless porpoise: Pharurus sunameri, Pharurus asiaeorientalis, Nasitrema spathulatum, Nasitrema sunameri, Halocercus pingi, Halocercus sunameri, Campula oblonga and Synthesium elongatum...
March 18, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28025274/mitochondrial-phylogenomics-resolves-the-global-spread-of-higher-termites-ecosystem-engineers-of-the-tropics
#12
Thomas Bourguignon, Nathan Lo, Jan Šobotník, Simon Y W Ho, Naeem Iqbal, Eric Coissac, Maria Lee, Martin M Jendryka, David Sillam-Dussès, Barbora Krížková, Yves Roisin, Theodore A Evans
The higher termites (Termitidae) are keystone species and ecosystem engineers. They have exceptional biomass and play important roles in decomposition of dead plant matter, in soil manipulation, and as the primary food for many animals, especially in the tropics. Higher termites are most diverse in rainforests, with estimated origins in the late Eocene (∼54 Ma), postdating the breakup of Pangaea and Gondwana when most continents became separated. Since termites are poor fliers, their origin and spread across the globe requires alternative explanation...
March 1, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/27957383/direct-analysis-in-real-time-mass-spectrometry-for-the-nondestructive-investigation-of-conservation-treatments-of-cultural-heritage
#13
Marcello Manfredi, Elisa Robotti, Greg Bearman, Fenella France, Elettra Barberis, Pnina Shor, Emilio Marengo
Today the long-term conservation of cultural heritage is a big challenge: often the artworks were subjected to unknown interventions, which eventually were found to be harmful. The noninvasive investigation of the conservation treatments to which they were subjected to is a crucial step in order to undertake the best conservation strategies. We describe here the preliminary results on a quick and direct method for the nondestructive identification of the various interventions of parchment by means of direct analysis in real time (DART) ionization and high-resolution time-of-flight mass spectrometry and chemometrics...
2016: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/27782787/smart-extraction-and-analysis-system-for-clinical-research
#14
Muhammad Afzal, Maqbool Hussain, Wajahat Ali Khan, Taqdir Ali, Arif Jamshed, Sungyoung Lee
BACKGROUND: With the increasing use of electronic health records (EHRs), there is a growing need to expand the utilization of EHR data to support clinical research. The key challenge in achieving this goal is the unavailability of smart systems and methods to overcome the issue of data preparation, structuring, and sharing for smooth clinical research. MATERIALS AND METHODS: We developed a robust analysis system called the smart extraction and analysis system (SEAS) that consists of two subsystems: (1) the information extraction system (IES), for extracting information from clinical documents, and (2) the survival analysis system (SAS), for a descriptive and predictive analysis to compile the survival statistics and predict the future chance of survivability...
October 26, 2016: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/27782359/iceberg-killing-fields-limit-huge-potential-for-benthic-blue-carbon-in-antarctic-shallows
#15
David K A Barnes
Climate-forced ice losses are increasing potential for iceberg-seabed collisions, termed ice scour. At Ryder Bay, West Antarctic Peninsula (WAP) sea ice, oceanography, phytoplankton and encrusting zoobenthos have been monitored since 1998. In 2003, grids of seabed markers, covering 225 m(2) , were established, surveyed and replaced annually to measure ice scour frequency. Disturbance history has been recorded for each m(2) of seabed monitored at 5-25 m for ~13 years. Encrusting fauna, collected from impacted and nonimpacted metres each year, show coincident benthos responses in growth, mortality and mass of benthic immobilized carbon...
October 26, 2016: Global Change Biology
https://www.readbyqxmd.com/read/27755745/demography-of-an-apex-predator-at-the-edge-of-its-range-impacts-of-changing-sea-ice-on-polar-bears-in-hudson-bay
#16
Nicholas J Lunn, Sabrina Servanty, Eric V Regehr, Sarah J Converse, Evan Richardson, Ian Stirling
Changes in the abundance and distribution of wildlife populations are common consequences of historic and contemporary climate change. Some Arctic marine mammals, such as the polar bear (Ursus maritimus), may be particularly vulnerable to such changes due to the loss of Arctic sea ice. We evaluated the impacts of environmental variation on demographic rates for the Western Hudson Bay (WH), polar bear subpopulation from 1984 to 2011 using live-recapture and dead-recovery data in a Bayesian implementation of multistate capture-recapture models...
July 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27755567/emergence-of-the-zoonotic-biliary-trematode-pseudamphistomum-truncatum-in-grey-seals-halichoerus-grypus-in-the-baltic-sea
#17
Aleksija S Neimanis, Charlotta Moraeus, Anders Bergman, Anders Bignert, Johan Höglund, Karl Lundström, Annika Strömberg, Britt-Marie Bäcklin
The biliary trematode Pseudamphistomum truncatum parasitizes a wide range of fish-eating mammals, including humans. Here we report the emergence of this parasite in grey seals (Halichoerus grypus) in the Baltic Sea. One hundred eighty-three of 1 554 grey seals (11.9%) examined from 2002-2013 had detectable hepatobiliary trematode infection. Parasite identification was confirmed as P. truncatum by sequencing the ITS2 region of a pool of five to 10 trematodes from each of ten seals collected off the coast of seven different Swedish counties...
2016: PloS One
https://www.readbyqxmd.com/read/27745741/detecting-sourcing-and-age-dating-dredged-sediments-on-the-open-shelf-southern-california-using-dead-mollusk-shells
#18
Matthew T Bizjack, Susan M Kidwell, Ronald G Velarde, Jill Leonard-Pingel, Adam Tomašových
Molluscan shell debris is an under-exploited means of detecting, sourcing, and age-dating dredged sediments in open-shelf settings. Backscatter features on the Southern California shelf are suggestive of dredged sediment hauled from San Diego Bay but deposited significantly inshore of the EPA-designated ocean disposal site. We find that 36% of all identifiable bivalve shells >2mm (44% of shells >4mm) in sediment samples from this 'short dump' area are from species known to live exclusively in the Bay; such shells are absent at reference sites of comparable water depth, indicating that their presence in the short-dump area signals non-compliant disposal rather than natural offshore transport or sea level rise...
January 15, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27741281/high-ancient-genetic-diversity-of-human-lice-pediculus-humanus-from-israel-reveals-new-insights-into-the-origin-of-clade-b-lice
#19
Nadia Amanzougaghene, Kosta Y Mumcuoglu, Florence Fenollar, Shir Alfi, Gonca Yesilyurt, Didier Raoult, Oleg Mediannikov
The human head louse, Pediculus humanus capitis, is subdivided into several significantly divergent mitochondrial haplogroups, each with particular geographical distributions. Historically, they are among the oldest human parasites, representing an excellent marker for tracking older events in human evolutionary history. In this study, ancient DNA analysis using real-time polymerase chain reaction (qPCR), combined with conventional PCR, was applied to the remains of twenty-four ancient head lice and their eggs from the Roman period which were recovered from Israel...
2016: PloS One
https://www.readbyqxmd.com/read/27718421/dna-damage-protecting-and-free-radical-scavenging-properties-of-mycosporine-2-glycine-from-the-dead-sea-cyanobacterium-in-a375-human-melanoma-cell-lines
#20
Vipaporn Cheewinthamrongrod, Hakuto Kageyama, Tanapat Palaga, Teruhiro Takabe, Rungaroon Waditee-Sirisattha
Mycosporine-like amino acids (MAAs) are a group of natural sunscreen compounds that possess highly photoprotective properties. The most commonly found MAAs in marine organisms is shinorine, porphyra-334, and mycosporine-glycine. However, the halophilic species accumulate mycosporine-2-glycine (M2G) as the major MAA. In this study, we have investigated the protective effect of M2G against oxidative stress. In vitro radical scavenging activity revealed that M2G exhibited a significant inhibition with scavenging concentration (SC) 50 value of 22±1...
November 2016: Journal of Photochemistry and Photobiology. B, Biology
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