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https://www.readbyqxmd.com/read/28098849/no-evidence-for-mhc-class-ii-based-non-random-mating-at-the-gametic-haplotype-in-atlantic-salmon
#1
M Promerová, G Alavioon, S Tusso, R Burri, S Immler
Genes of the major histocompatibility complex (MHC) are a likely target of mate choice because of their role in inbreeding avoidance and potential benefits for offspring immunocompetence. Evidence for female choice for complementary MHC alleles among competing males exists both for the pre- and the postmating stages. However, it remains unclear whether the latter may involve non-random fusion of gametes depending on gametic haplotypes resulting in transmission ratio distortion or non-random sequence divergence among fused gametes...
January 18, 2017: Heredity
https://www.readbyqxmd.com/read/28097664/testing-mate-choice-and-overdominance-at-mh-in-natural-families-of-atlantic-salmon-salmo-salar
#2
C Tentelier, O Barroso-Gomila, O Lepais, A Manicki, I Romero-Garmendia, B M Jugo
This study aimed to test mate choice and selection during early life stages on major histocompatibility (MH) genotype in natural families of Atlantic salmon Salmo salar spawners and juveniles, using nine microsatellites to reconstruct families, one microsatellite linked to an MH class I gene and one minisatellite linked to an MH class II gene. MH-based mate choice was only detected for the class I locus on the first year, with lower expected heterozygosity in the offspring of actually mated pairs than predicted under random mating...
January 18, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28096397/correction-for-roberts-et-al-evolution-of-south-atlantic-density-and-chemical-stratification-across-the-last-deglaciation
#3
(no author information available yet)
No abstract text is available yet for this article.
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28096366/iron-isotopes-reveal-distinct-dissolved-iron-sources-and-pathways-in-the-intermediate-versus-deep-southern-ocean
#4
Cyril Abadie, Francois Lacan, Amandine Radic, Catherine Pradoux, Franck Poitrasson
As an essential micronutrient, iron plays a key role in oceanic biogeochemistry. It is therefore linked to the global carbon cycle and climate. Here, we report a dissolved iron (DFe) isotope section in the South Atlantic and Southern Ocean. Throughout the section, a striking DFe isotope minimum (light iron) is observed at intermediate depths (200-1,300 m), contrasting with heavier isotopic composition in deep waters. This unambiguously demonstrates distinct DFe sources and processes dominating the iron cycle in the intermediate and deep layers, a feature impossible to see with only iron concentration data largely used thus far in chemical oceanography...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28095829/a-middle-eastern-journey-of-integrating-interprofessional-education-into-the-healthcare-curriculum-a-swoc-analysis
#5
Alla El-Awaisi, Kyle John Wilby, Kerry Wilbur, Maguy Saffouh El Hajj, Ahmed Awaisu, Bridget Paravattil
BACKGROUND: Interprofessional education (IPE) is an emerging concept in the Middle East with a number of health professional degree programs continually striving to meet international accreditation requirements to enhance the quality of education and ensure high standards are maintained. Using the College of Pharmacy at Qatar University (CPH QU) as a model, this article describes the IPE initiatives coordinated through the College's IPE Committee, with representation from fourteen programs at four Healthcare institutions: Qatar University; Weill Cornell Medical College in Qatar; the University of Calgary in Qatar; and the College of North Atlantic in Qatar...
January 17, 2017: BMC Medical Education
https://www.readbyqxmd.com/read/28095345/forensic-assignment-to-geographic-origin-a-useful-tool-in-seafood-fraud-control
#6
J L Horreo, G Machado-Schiaffino, E García-Vázquez
Seafood fraud is an economically motivated and widely spread problem encompassing drastic consequences in both public health and species conservation. In Northern Spain, only the first Atlantic salmon (Salmo salar) catch of the angling season (named Campanu) can be sold. In the year 2011, an angler denounced it on regional Court claiming that the Campanu (which was sold in 6000€) was fraudulent because it had been caught from another river than the fisherman ("the seller") stated. Here, we report the first judicial case of application of geographical genetic assignment in a fish species in Spain...
January 10, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28094798/stable-isotopes-in-the-atmospheric-marine-boundary-layer-water-vapour-over-the-atlantic-ocean-2012-2015
#7
Marion Benetti, Hans Christian Steen-Larsen, Gilles Reverdin, Árný Erla Sveinbjörnsdóttir, Giovanni Aloisi, Max B Berkelhammer, Bernard Bourlès, Denis Bourras, Gaëlle de Coetlogon, Ann Cosgrove, Anne-Katrine Faber, Jacques Grelet, Steffen Bo Hansen, Rod Johnson, Hervé Legoff, Nicolas Martin, Andrew J Peters, Trevor James Popp, Thierry Reynaud, Malte Winther
The water vapour isotopic composition ((1)H2(16)O, H2(18)O and (1)H(2)H(16)O) of the Atlantic marine boundary layer has been measured from 5 research vessels between 2012 and 2015. Using laser spectroscopy analysers, measurements have been carried out continuously on samples collected 10-20 meter above sea level. All the datasets have been carefully calibrated against the international VSMOW-SLAP scale following the same protocol to build a homogeneous dataset covering the Atlantic Ocean between 4°S to 63°N...
January 17, 2017: Scientific Data
https://www.readbyqxmd.com/read/28092806/life-cycle-ultrastructure-and-phylogeny-of-parvilucifera-corolla-sp-nov-alveolata-perkinsozoa-a-parasitoid-of-dinoflagellates
#8
Albert Reñé, Elisabet Alacid, Rosa Isabel Figueroa, Francisco Rodríguez, Esther Garcés
Recent studies of marine protists have revealed parasites to be key components of marine communities. Here we describe a new species of the parasitoid genus Parvilucifera that was observed infecting the dinoflagellate Durinskia baltica in salt marshes of the Catalan coast (NW Mediterranean). In parallel, the same species was detected after the incubation of seawater from the Canary Islands (Lanzarote, NE Atlantic). The successful isolation of strains from both localities allowed description of the life cycle, ultrastructure, and phylogeny of the species...
December 13, 2016: European Journal of Protistology
https://www.readbyqxmd.com/read/28091855/combining-dispersion-modelling-with-synoptic-patterns-to-understand-the-wind-borne-transport-into-the-uk-of-the-bluetongue-disease-vector
#9
Laura Burgin, Marie Ekström, Suraje Dessai
Bluetongue, an economically important animal disease, can be spread over long distances by carriage of insect vectors (Culicoides biting midges) on the wind. The weather conditions which influence the midge's flight are controlled by synoptic scale atmospheric circulations. A method is proposed that links wind-borne dispersion of the insects to synoptic circulation through the use of a dispersion model in combination with principal component analysis (PCA) and cluster analysis. We illustrate how to identify the main synoptic situations present during times of midge incursions into the UK from the European continent...
January 14, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28089856/erythrocyte-heat-shock-protein-responses-to-chronic-in-vivo-and-acute-in-vitro-temperature-challenge-in-diploid-and-triploid-salmonids
#10
Pillai V Saranyan, Neil W Ross, Tillmann J Benfey
This research investigated how ploidy level (diploid versus triploid) affects the heat shock protein (HSP) response in erythrocytes under different thermal stress regimes, both in vivo and in vitro, in Atlantic salmon (Salmo salar) and brook charr (Salvelinus fontinalis) in order to address the question of why triploids typically have reduced thermal tolerance. A preliminary study confirmed that identical volumes of diploid and triploid erythrocytes (which equates to a smaller number of larger cells for triploids compared to diploids) did not differ in total protein synthesis rates...
January 13, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28089553/plastic-debris-straps-on-threatened-blue-shark-prionace-glauca
#11
Ana I Colmenero, Claudio Barría, Elisabetta Broglio, Salvador García-Barcelona
Juveniles of blue shark Prionace glauca caught in pelagic longlines targeting tuna and swordfish in the Atlantic Ocean and the Mediterranean Sea were found entangled with plastic straps around their gill region. The plastic debris were identified as strapping bands and caused several degrees of injuries on the dorsal musculature and pectoral fins. They were also obstructing the gill slits probably causing breathing issues. These records were uploaded in the web site seawatchers.org, and highlight the potential of citizen science in revealing the occurrence of such problems which could help to measure the effects of plastic debris on marine life...
January 12, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28089211/toxicity-effects-of-an-environmental-realistic-herbicide-mixture-on-the-seagrass-zostera-noltei
#12
Noël J Diepens, Evelyne Buffan-Dubau, Hélène Budzinski, Jean Kallerhoff, Georges Merlina, Jérome Silvestre, Isabelle Auby, Nathalie Tapie, Arnaud Elger
Worldwide seagrass declines have been observed due to multiple stressors. One of them is the mixture of pesticides used in intensive agriculture and boat antifouling paints in coastal areas. Effects of mixture toxicity are complex and poorly understood. However, consideration of mixture toxicity is more realistic and ecologically relevant for environmental risk assessment (ERA). The first aim of this study was to determine short-term effects of realistic herbicide mixture exposure on physiological endpoints of Zostera noltei...
January 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28088697/vertical-distribution-of-236-u-in-the-north-pacific-ocean
#13
R Eigl, P Steier, K Sakata, A Sakaguchi
The first extensive study on (236)U in the North Pacific Ocean has been conducted. The vertical distribution of (236)U/(238)U isotopic ratios and the (236)U concentrations were analysed on seven depth profiles, and large variations with depth were found. The range of (236)U/(238)U isotopic ratios was from (0.09 ± 0.03) × 10(-10) to (14.1 ± 2.2) × 10(-10), which corresponds to (236)U concentrations of (0.69 ± 0.24) × 10(5) atoms/kg and (119 ± 21) × 10(5) atoms/kg, respectively. The variations in (236)U concentrations could mainly be attributed to the different water masses in the North Pacific Ocean and their formation processes...
January 12, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28087655/hagfish-houdinis-biomechanics-and-behavior-of-squeezing-through-small-openings
#14
Calli R Freedman, Douglas S Fudge
Hagfishes are able to squeeze through small openings to gain entry to crevices, burrows, hagfish traps, and carcasses, but little is known about how they do this, or what the limits of this ability are. The purpose of this study was to describe this ability, and to investigate possible mechanisms by which it is accomplished. We investigated the hypothesis that the passive movement of blood within a hagfish's flaccid subcutaneous sinus allows it to squeeze through narrow apertures that it would not be able to if it were turgid...
January 13, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28086786/widespread-introgression-in-deep-sea-hydrothermal-vent-mussels
#15
Corinna Breusing, Robert C Vrijenhoek, Thorsten B H Reusch
BACKGROUND: The analysis of hybrid zones is crucial for gaining a mechanistic understanding of the process of speciation and the maintenance of species boundaries. Hybrid zones have been studied intensively in terrestrial and shallow-water ecosystems, but very little is known about their occurrence in deep-sea environments. Here we used diagnostic, single nucleotide polymorphisms in combination with one mitochondrial gene to re-examine prior hypotheses about a contact zone involving deep-sea hydrothermal vent mussels, Bathymodiolus azoricus and B...
January 13, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28086785/whole-genome-resequencing-reveals-diagnostic-markers-for-investigating-global-migration-and-hybridization-between-minke-whale-species
#16
Ketil Malde, Bjørghild B Seliussen, María Quintela, Geir Dahle, Francois Besnier, Hans J Skaug, Nils Øien, Hiroko K Solvang, Tore Haug, Rasmus Skern-Mauritzen, Naohisa Kanda, Luis A Pastene, Inge Jonassen, Kevin A Glover
BACKGROUND: In the marine environment, where there are few absolute physical barriers, contemporary contact between previously isolated species can occur across great distances, and in some cases, may be inter-oceanic. An example of this can be seen in the minke whale species complex. Antarctic minke whales are genetically and morphologically distinct from the common minke found in the north Atlantic and Pacific oceans, and the two species are estimated to have been isolated from each other for 5 million years or more...
January 13, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28081121/isolation-of-novel-trypanosomatid-zelonia-australiensis-sp-nov-kinetoplastida-trypanosomatidae-provides-support-for-a-gondwanan-origin-of-dixenous-parasitism-in-the-leishmaniinae
#17
Joel Barratt, Alexa Kaufer, Bryce Peters, Douglas Craig, Andrea Lawrence, Tamalee Roberts, Rogan Lee, Gary McAuliffe, Damien Stark, John Ellis
The genus Leishmania includes approximately 53 species, 20 of which cause human leishmaniais; a significant albeit neglected tropical disease. Leishmaniasis has afflicted humans for millennia, but how ancient is Leishmania and where did it arise? These questions have been hotly debated for decades and several theories have been proposed. One theory suggests Leishmania originated in the Palearctic, and dispersed to the New World via the Bering land bridge. Others propose that Leishmania evolved in the Neotropics...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28080914/tricaine-methanesulfonate-ms-222-sedation-and-anesthesia-in-the-purple-spined-sea-urchin-arbacia-punctulata
#18
Jeffrey R Applegate, Daniel S Dombrowski, Larry Shane Christian, Meredith P Bayer, Craig A Harms, Gregory A Lewbart
The purple-spined sea urchin ( Arbacia punctulata ) is commonly found in shallow waters of the western Atlantic Ocean from the New England area of the United States to the Caribbean. Sea urchins play a major role in ocean ecology, echinoculture, and biomedical research. Additionally, sea urchins are commonly displayed in public aquaria. Baseline parameters were developed in unanesthetized urchins for righting reflex (time to regain oral recumbency) and spine response time to tactile stimulus. Tricaine methanesulfonate (MS-222) was used to sedate and anesthetize purple-spined sea urchins and assess sedation and anesthetic parameters, including adhesion to and release from a vertical surface, times to loss of response to tactile stimulus and recovery of righting reflex, and qualitative observations of induction of spawning and position of spines and pseudopodia...
December 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28079106/extreme-mitochondrial-variation-in-the-atlantic-gall-crab-opecarcinus-hypostegus-decapoda-cryptochiridae-reveals-adaptive-genetic-divergence-over-agaricia-coral-hosts
#19
Kaj M van Tienderen, Sancia E T van der Meij
The effectiveness of migration in marine species exhibiting a pelagic larval stage is determined by various factors, such as ocean currents, pelagic larval stage duration and active habitat selection. Direct measurement of larval movements is difficult and, consequently, factors determining the gene flow patterns remain poorly understood for many species. Patterns of gene flow play a key role in maintaining genetic homogeneity in a species by dampening the effects of local adaptation. Coral-dwelling gall crabs (Cryptochiridae) are obligate symbionts of stony corals (Scleractinia)...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078345/comparison-between-the-optical-properties-of-aerosols-in-the-fine-and-coarse-fractions-over-valladolid-spain
#20
S Mogo, J F López, V E Cachorro, A de Frutos, R Zocca, A Barroso, D Mateos, E Conceição
Continuous measurements of the optical properties of aerosol particles have been made at Valladolid, Spain, covering the period from June 2011 to July 2012. The measurements were made at two size cuts: sub-10 μm and sub-1 μm (PM10 and PM1). The data measured were the scattering and backscattering coefficients, σs and σbs, obtained from an integrating nephelometer, and the absorption coefficient, σa, obtained from a particle soot absorption photometer. Spectrally resolved data were obtained from both instruments at 3 wavelengths (blue/green/red) at low relative humidity (RH < 40%)...
January 12, 2017: Environmental Science. Processes & Impacts
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