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https://www.readbyqxmd.com/read/28645762/calculating-in-situ-degradation-rates-of-hydrocarbon-compounds-in-deep-waters-of-the-gulf-of-mexico
#1
Anne E Thessen, Elizabeth W North
Biodegradation is an important process for hydrocarbon weathering that influences its fate and transport, yet little is known about in situ biodegradation rates of specific hydrocarbon compounds in the deep ocean. Using data collected in the Gulf of Mexico below 700m during and after the Deepwater Horizon oil spill, we calculated first-order degradation rate constants for 49 hydrocarbons and inferred degradation rate constants for an additional 5 data-deficient hydrocarbons. Resulting calculated (not inferred) half-lives of the hydrocarbons ranged from 0...
June 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28642866/evaluation-of-serum-for-pathophysiological-effects-of-prolonged-low-salinity-water-exposure-in-displaced-bottlenose-dolphins-tursiops-truncatus
#2
Ruth Y Ewing, Blair Mase-Guthrie, Wayne McFee, Forrest Townsend, Charles A Manire, Michael Walsh, Rose Borkowski, Gregory D Bossart, Adam M Schaefer
We conducted a retrospective study of serum biochemistry and hematologic findings from displaced, out-of-habitat bottlenose dolphins (Tursiops truncatus) exposed to various low salinity environments in waters along the southern United States including southeastern Atlantic and northern Gulf of Mexico. Serum sodium, chloride, and calculated osmolality were significantly lower and below reference ranges in displaced animals compared to free-ranging case control animals. This suggests clinical hyponatremia, hypochloremia, and hypo-osmolality due to an uptake of low saline water from the environment...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28640913/temporal-patterns-of-deepwater-horizon-impacts-on-the-benthic-infauna-of-the-northern-gulf-of-mexico-continental-slope
#3
Michael G Reuscher, Jeffrey G Baguley, Nathan Conrad-Forrest, Cynthia Cooksey, Jeffrey L Hyland, Christopher Lewis, Paul A Montagna, Robert W Ricker, Melissa Rohal, Travis Washburn
The Deepwater Horizon oil spill occurred in spring and summer 2010 in the northern Gulf of Mexico. Research cruises in 2010 (approximately 2-3 months after the well had been capped), 2011, and 2014 were conducted to determine the initial and subsequent effects of the oil spill on deep-sea soft-bottom infauna. A total of 34 stations were sampled from two zones: 20 stations in the "impact" zone versus 14 stations in the "non-impact" zone. Chemical contaminants were significantly different between the two zones...
2017: PloS One
https://www.readbyqxmd.com/read/28639473/revision-and-new-species-of-vasotrema-stunkard-1926-digenea-schistosomatoidea-turtle-blood-flukes-of-north-american-softshell-turtles-testudines-trionychidae-apalone-spp
#4
Jackson Roberts, Stephen Ashton Bullard
Gulf Coast spiny softshell turtles, Apalone spinifera aspera (Agassiz, 1857), (Testudines: Trionychidae) from Canoe Lake (33°47'56.16"N, 86°29'25.02"W; Springville, Alabama, USA) and Round Lake (32°41'50.91"N, 87°14'30.39"W; Perry Lakes State Park, Marion, Alabama, USA) were infected by Vasotrema robustum Stunkard, 1928, Vasotrema longitestis Byrd, 1939, and Vasotrema rileyae n. sp. The new species differs from its congeners by having papillate suckers, a short testis, an ovary dextral to the oviduct, and a pre-ovarian genital pore that is lateral to the ventral sucker...
June 22, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28634886/subcortical-brain-atrophy-in-gulf-war-illness
#5
Peka Christova, Lisa M James, Brian E Engdahl, Scott M Lewis, Adam F Carpenter, Apostolos P Georgopoulos
Gulf War Illness (GWI) is a multisystem disorder that has affected a substantial number of veterans who served in the 1990-1991 Gulf War. The brain is prominently affected, as manifested by the presence of neurological, cognitive and mood symptoms. Although brain dysfunction in GWI has been well documented (EBioMedicine 12:127-32, 2016), abnormalities in brain structure have been debated. Here we report a substantial (~10%) subcortical brain atrophy in GWI comprising mainly the brainstem, cerebellum and thalamus, and, to a lesser extent, basal ganglia, amygdala and diencephalon...
June 20, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28633666/molecular-detection-of-vector-borne-pathogens-in-dogs-and-cats-from-qatar
#6
Ana Margarida Alho, Clara Lima, Maria Stefania Latrofa, Vito Colella, Silvia Ravagnan, Gioia Capelli, Luís Madeira de Carvalho, Luís Cardoso, Domenico Otranto
BACKGROUND: Vector-borne diseases (VBDs) have been increasingly reported in dogs and cats worldwide. However, no data are currently available regarding canine and feline VBDs in Qatar and limited information is available from other Persian Gulf countries. METHODS: Blood samples from 98 client-owned animals (i.e. 64 dogs and 34 cats) living in Doha (Qatar) were collected and the presence of genomic DNA of Anaplasma spp., Babesia spp., Dirofilaria spp., Ehrlichia spp...
June 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28633032/animal-navigation-the-eel-s-magnetic-guide-to-the-gulf-stream
#7
Miguel Baltazar-Soares, Christophe Eizaguirre
The geographic distribution of migratory species can span thousands of kilometers. Yet, traits that enable large-scale migrations are poorly understood. A recent study demonstrates that juvenile eels use the Earth's magnetism for their dispersal, with possible implications for their evolution.
June 19, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28632794/migrants-healthy-worker-effect-and-mortality-trends-in-the-gulf-cooperation-council-countries
#8
Karima Chaabna, Sohaila Cheema, Ravinder Mamtani
The Gulf Cooperation Council (GCC) countries namely, Bahrain, Kuwait, Oman, Qatar, United Arab Emirates (UAE), and Saudi Arabia, have experienced unique demographic changes. The major population growth contributor in these countries is young migrants, which has led to a shift in the population age pyramid. Migrants constitute the vast proportion of GCC countries' population reaching >80% in Qatar and UAE. Using Global Burden of Disease Study 2015 (GBD 2015) and United Nations data, for the GCC countries, we assessed the association between age-standardized mortality and population size trends with linear and polynomial regressions...
2017: PloS One
https://www.readbyqxmd.com/read/28631732/skillful-prediction-of-northern-climate-provided-by-the-ocean
#9
Marius Årthun, Tor Eldevik, Ellen Viste, Helge Drange, Tore Furevik, Helen L Johnson, Noel S Keenlyside
It is commonly understood that a potential for skillful climate prediction resides in the ocean. It nevertheless remains unresolved to what extent variable ocean heat is imprinted on the atmosphere to realize its predictive potential over land. Here we assess from observations whether anomalous heat in the Gulf Stream's northern extension provides predictability of northwestern European and Arctic climate. We show that variations in ocean temperature in the high latitude North Atlantic and Nordic Seas are reflected in the climate of northwestern Europe and in winter Arctic sea ice extent...
June 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28630895/glass-eels-anguilla-anguilla-have-a-magnetic-compass-linked-to-the-tidal-cycle
#10
Alessandro Cresci, Claire B Paris, Caroline M F Durif, Steven Shema, Reidun M Bjelland, Anne Berit Skiftesvik, Howard I Browman
The European eel (Anguilla anguilla) has one of the longest migrations in the animal kingdom. It crosses the Atlantic Ocean twice during its life history, migrating between the spawning area in the Sargasso Sea and Europe, where it is widely distributed. The leptocephalus larvae drift with the Gulf Stream and other currents for more than a year and metamorphose into glass eels when they arrive on the continental shelf and move toward coastal areas. The mechanisms underlying glass eel orientation toward the coast and into freshwater systems are poorly known...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28628098/short-chain-alkanes-fuel-mussel-and-sponge-cycloclasticus-symbionts-from-deep-sea-gas-and-oil-seeps
#11
Maxim Rubin-Blum, Chakkiath Paul Antony, Christian Borowski, Lizbeth Sayavedra, Thomas Pape, Heiko Sahling, Gerhard Bohrmann, Manuel Kleiner, Molly C Redmond, David L Valentine, Nicole Dubilier
Cycloclasticus bacteria are ubiquitous in oil-rich regions of the ocean and are known for their ability to degrade polycyclic aromatic hydrocarbons (PAHs). In this study, we describe Cycloclasticus that have established a symbiosis with Bathymodiolus heckerae mussels and poecilosclerid sponges from asphalt-rich, deep-sea oil seeps at Campeche Knolls in the southern Gulf of Mexico. Genomic and transcriptomic analyses revealed that, in contrast to all previously known Cycloclasticus, the symbiotic Cycloclasticus appears to lack the genes needed for PAH degradation...
June 19, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28627494/first-record-of-proliferative-kidney-disease-agent-tetracapsuloides-bryosalmonae-in-wild-brown-trout-and-european-grayling-in-finland
#12
Anti Vasemägi, Ilkka Nousiainen, Ari Saura, Juha-Pekka Vähä, Jorma Valjus, Ari Huusko
The myxozoan endoparasite Tetracapsuloides bryosalmonae causes temperature-driven proliferative kidney disease (PKD) in salmonid fishes. Despite the economic and ecological importance of PKD, information about the distribution of the parasite is still scarce. Here, we report for the first time the occurrence of T. bryosalmonae in wild brown trout Salmo trutta and European grayling Thymallus thymallus populations in Finland. We detected T. bryosalmonae at high prevalence in both brown trout and European grayling from the transboundary Finnish-Russian River Koutajoki system (Rivers Oulankajoki, Kuusinkijoki, Kitkajoki, Maaninkajoki, and Juumajoki) in north-eastern Finland...
June 19, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28626607/phenotypic-variation-in-dorsal-fin-morphology-of-coastal-bottlenose-dolphins-tursiops-truncatus-off-mexico
#13
Eduardo Morteo, Axayácatl Rocha-Olivares, Rodrigo Morteo, David W Weller
Geographic variation in external morphology is thought to reflect an interplay between genotype and the environment. Morphological variation has been well-described for a number of cetacean species, including the bottlenose dolphin (Tursiops truncatus). In this study we analyzed dorsal fin morphometric variation in coastal bottlenose dolphins to search for geographic patterns at different spatial scales. A total of 533 dorsal fin images from 19 available photo-identification catalogs across the three Mexican oceanic regions (Pacific Ocean n = 6, Gulf of California n = 6 and, Gulf of Mexico n = 7) were used in the analysis...
2017: PeerJ
https://www.readbyqxmd.com/read/28624876/morphological-and-molecular-characterization-of-a-new-cyprinid-gall-bladder-infecting-chloromyxum-species-chloromyxum-peleci-sp-n-myxozoa-chloromyxidae-from-pelecus-cultratus-l-in-russia
#14
X H Liu, V N Voronin, A S Dudin, D A Morozova, J Y Zhang
Extensive sampling to get rich data is very important to resolve the current taxonomic problem of Chloromyxum genus and elucidate the nature phylogenetic relationships among congeneric species. During the parasitological survey of cyprinid fish in Gulf of Finland off the coast of St. Petersburg, a new Chloromyxum species, named as Chloromyxum peleci sp. n., was found to infect the gall bladder of sichel, Pelecus cultratus (L.). Here, we provided the morphological, ultrastructural, and molecular features to describe it...
June 18, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28619627/composition-spatial-distribution-and-sources-of-macro-marine-litter-on-the-gulf-of-alicante-seafloor-spanish-mediterranean
#15
Santiago García-Rivera, Jose Luis Sánchez Lizaso, Jose María Bellido Millán
The composition, spatial distribution and source of marine litter in the Spanish Southeast Mediterranean were assessed. The data proceed from a marine litter retention programme implemented by commercial trawlers and were analysed by GIS. By weight, 75.9% was plastic, metal and glass. Glass and plastics were mainly found close to the coast. A high concentration of metal was observed in some isolated zones of both open and coastal waters. Fishing activity was the source of 29.16% of the macro-marine litter, almost 68...
June 12, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28618791/broadband-classification-and-statistics-of-echoes-from-aggregations-of-fish-measured-by-long-range-mid-frequency-sonar
#16
Benjamin A Jones, Timothy K Stanton, John A Colosi, Roger C Gauss, Joseph M Fialkowski, J Michael Jech
For horizontal-looking sonar systems operating at mid-frequencies (1-10 kHz), scattering by fish with resonant gas-filled swimbladders can dominate seafloor and surface reverberation at long-ranges (i.e., distances much greater than the water depth). This source of scattering, which can be difficult to distinguish from other sources of scattering in the water column or at the boundaries, can add spatio-temporal variability to an already complex acoustic record. Sparsely distributed, spatially compact fish aggregations were measured in the Gulf of Maine using a long-range broadband sonar with continuous spectral coverage from 1...
June 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28616973/vegetation-loss-decreases-salt-marsh-denitrification-capacity-implications-for-marsh-erosion
#17
Sarra E Hinshaw, Corianne Tatariw, Nikaela Flournoy, Alice Kleinhuizen, Caitlin Bailey Taylor, Patricia Sobecky, Behzad Mortazavi
Salt marshes play a key role in removing excess anthropogenic nitrogen (N) loads to nearshore marine ecosystems through sediment microbial processes such as denitrification. However, in the Gulf of Mexico the loss of marsh vegetation due to human-driven disturbances such as sea level rise and oil spills can potentially reduce marsh capacity for N removal. In order to investigate the effect of vegetation loss on ecosystem N removal, we contrasted denitrification capacity in marsh and subtidal sediments impacted by the Deepwater Horizon oil spill using a combination of (29)N2 and (30)N2 production (isotope pairing), denitrification potential measurements (acetylene block), and quantitative PCR (qPCR) of functional genes in the denitrification pathway...
June 15, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28615353/discovery-of-the-fossil-otter-enhydritherium-terraenovae-carnivora-mammalia-in-mexico-reconciles-a-palaeozoogeographic-mystery
#18
Z Jack Tseng, Adolfo Pacheco-Castro, Oscar Carranza-Castañeda, José Jorge Aranda-Gómez, Xiaoming Wang, Hilda Troncoso
The North American fossil otter Enhydritherium terraenovae is thought to be partially convergent in ecological niche with the living sea otter Enhydra lutris, both having low-crowned crushing teeth and a close association with marine environments. Fossil records of Enhydritherium are found in mostly marginal marine deposits in California and Florida; despite presence of very rich records of fossil terrestrial mammals in contemporaneous localities inland, no Enhydritherium fossils are hitherto known in interior North America...
June 2017: Biology Letters
https://www.readbyqxmd.com/read/28611365/estimating-fish-abundance-at-spawning-aggregations-from-courtship-sound-levels
#19
Timothy J Rowell, David A Demer, Octavio Aburto-Oropeza, Juan José Cota-Nieto, John R Hyde, Brad E Erisman
Sound produced by fish spawning aggregations (FSAs) permits the use of passive acoustic methods to identify the timing and location of spawning. However, difficulties in relating sound levels to abundance have impeded the use of passive acoustics to conduct quantitative assessments of biomass. Here we show that models of measured fish sound production versus independently measured fish density can be generated to estimate abundance and biomass from sound levels at FSAs. We compared sound levels produced by spawning Gulf Corvina (Cynoscion othonopterus) with simultaneous measurements of density from active acoustic surveys in the Colorado River Delta, Mexico...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28610755/epistemological-erasure-the-subject-of-abuse-in-the-problematization-of-elder-abuse
#20
Bridget Garnham, Lia Bryant
The academic field of literature pertaining to elder abuse emerges largely from gerontology with contributions from a variety of disciplines including geriatric medicine, nursing, public health, law, psychology, sociology and social work. This paper presents a critical review of articles drawn from this literature to identify current directions leading the development of empirical research in this field. The objective measurement of prevalence, the identification and correlation of psycho-social risk factors and practice-based research oriented to intervention and prevention are identified as privileged sites for scientific investigation...
April 2017: Journal of Aging Studies
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