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https://www.readbyqxmd.com/read/28214947/the-redistribution-of-non-breeding-dunlins-in-response-to-the-post-ddt-recovery-of-falcons
#1
Ronald C Ydenberg, Jennifer Barrett, David B Lank, Cailin Xu, Michiel Faber
Large-scale changes in predator populations are occurring worldwide due to (re-)introductions, over-exploitation, or recovery after decimation by pesticides and persecution. These widespread changes may affect the distribution of their prey. We studied the continental-scale distributions of non-breeding Calidris alpina pacifica and C. a. hudsonia (Pacific and Atlantic dunlins, respectively), as numbers of their major predators-peregrines (Falco peregrinus) and merlins (F. columbarius; together 'falcons')-increased after DDT was banned in 1973...
February 18, 2017: Oecologia
https://www.readbyqxmd.com/read/28214702/triploid-atlantic-salmon-shows-similar-performance-fatty-acid-composition-and-proteome-response-to-diploids-during-early-freshwater-rearing
#2
Waldo G Nuez-Ortín, Chris G Carter, Richard Wilson, Ira R Cooke, Gianluca Amoroso, Jennifer M Cobcroft, Peter D Nichols
There is currently renewed interest in farming triploid Atlantic salmon. Improving farming requires identifying triploid specific phenotypic and physiological traits that are uniquely derived from ploidy per se and developed under optimal growing conditions. This study investigated firstly, the impact of ploidy on growth performance and whole body composition of Atlantic salmon at different early freshwater stages [34dph (days post-hatching) alevin, 109dph fry, and 162dph parr] and secondly, whether phenotypic differences at these stages were reflected in protein samples collected from whole fish, white muscle or liver tissue...
February 11, 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/28213827/resistance-to-polycyclic-aromatic-hydrocarbon-toxicity-and-associated-bioenergetic-consequences-in-a-population-of-fundulus-heteroclitus
#3
C D Lindberg, N Jayasundara, J S Kozal, T C Leuthner, R T Di Giulio
Several locations in the Elizabeth River, VA, USA are highly contaminated with polycyclic aromatic hydrocarbons (PAHs) due to the release of creosote mixtures from wood treatment facilities. Interestingly, some populations of Atlantic killifish (Fundulus heteroclitus) inhabiting the Elizabeth River (ER) are resistant to PAH-induced teratogenesis. However, evolutionary resistance to PAHs due to chronic PAH exposure is associated with reduced fitness and increased susceptibility to other environmental stressors in at least one PAH-resistant ER killifish population...
February 17, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28213544/isolation-and-characterization-of-a-unique-strain-of-rickettsia-parkeri-associated-with-the-hard-tick-dermacentor-parumapertus-neumann-in-the-western-united-states
#4
Christopher D Paddock, Michelle E J Allerdice, Sandor E Karpathy, William L Nicholson, Michael L Levin, Travis C Smith, Tom Becker, Robert J Delph, Robert N Knight, Jana M Ritter, Jeanine H Sanders, Jerome Goddard
In 1953, investigators at the Rocky Mountain Laboratories in Hamilton, Montana, described the isolation of a spotted fever group Rickettsia (SFGR) species from Dermacentor parumapertus collected from black-tailed jackrabbits (Lepus californicus) in northern Nevada. Several decades later, investigators characterized this SFGR by using mouse serotyping methods and determined that it represented a distinct rickettsial serotype, related closely to Rickettsia parkeri; nonetheless, the parumapertus agent was not further characterized or studied...
February 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28209476/the-role-of-a-psp-producing-alexandrium-bloom-in-an-unprecedented-diamondback-terrapin-malaclemys-terrapin-mortality-event-in-flanders-bay-new-york-usa
#5
Theresa K Hattenrath-Lehmann, Robert J Ossiboff, Craig A Burnell, Carlton D Rauschenberg, Kevin Hynes, Russell L Burke, Elizabeth M Bunting, Kim Durham, Christopher J Gobler
Diamondback terrapins (Malaclemys terrapin) are a threatened or endangered species in much of their range along the U.S. Atlantic and Gulf coasts. Over an approximately three-week period from late April to mid-May 2015, hundreds of adult diamondback terrapins were found dead on the shores of Flanders Bay, Long Island, New York, USA. Concurrent with the mortality event, elevated densities of the paralytic shellfish toxin (PST)-producing dinoflagellate, Alexandrium fundyense (>10(4) cells L(-1)) and high levels of PST in bivalves (maximal levels = 540 μg STX eq...
February 14, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28209405/insights-of-pb-isotopic-signature-into-the-historical-evolution-and-sources-of-pb-contamination-in-a-sediment-core-of-the-southwestern-iberian-atlantic-shelf
#6
Mário Mil-Homens, Carlos Vale, Pedro Brito, Filipa Naughton, Teresa Drago, Joana Raimundo, Bárbara Anes, Sabine Schmidt, Miguel Caetano
Stable Pb isotopic ratios and concentrations of Al, Cu and Pb were measured in a 5m long sediment core (VC2B) retrieved at 96m water depth in the southwestern Iberian Atlantic shelf. Five phases during the last 9.5kyrs were identified, two of them (Roman Period and modern mining) marked by a decrease of (206)Pb/(207)Pb ratios reflecting additional inputs of Pb derived from mining activities. The Roman Period was also characterized by high (208)Pb/(206)Pb ratios suggesting the exploitation of the outcropping portion of the orebody intensely weathered when compared with the other formations later mined...
February 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28207967/the-synonymy-of-the-toxic-dinoflagellates-prorocentrum-mexicanum-and-p-rhathymum-and-the-description-of-p-steidingerae-sp-nov-prorocentrales-dinophyceae
#7
Fernando Gómez, Dajun Qiu, Senjie Lin
Prorocentrum mexicanum and P. rhathymum are toxicologically important dinoflagellates, but their relationship is not well defined. We investigated strains from Puerto Rico and Brazil by light and scanning electron microscopies. We provide molecular data from a strain isolated near the type locality of P. rhathymum, and the first morphological and molecular data from the South Atlantic Ocean. The rRNA gene (rDNA) sequences of the Puerto Rican and Brazilian strains were identical, and their morphologies fit the description of P...
February 16, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28205603/influences-of-volcano-eruptions-on-asian-summer-monsoon-over-the-last-110-years
#8
Liang Ning, Jian Liu, Weiyi Sun
Asian summer monsoon (ASM) precipitation is the primary water resource for agriculture in many Asian countries that have experienced rapid economic growth in recent decades, thus implying the necessity for further investigations on both the internal variability of the ASM and the influence of external factors on the ASM. Using long-term high-resolution (0.5° × 0.5°) observed precipitation data, contrary to previous studies on inter-annual timescale, we showed that over the last 110 years, volcanic eruptions have influenced ASM variations on an inter-decadal timescale via teleconnections with the Atlantic Multi-decadal Oscillation (AMO)...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28205543/ontogenetic-loops-in-habitat-use-highlight-the-importance-of-littoral-habitats-for-early-life-stages-of-oceanic-fishes-in-temperate-waters
#9
Patrick Polte, Paul Kotterba, Dorothee Moll, Lena von Nordheim
General concepts of larval fish ecology in temperate oceans predominantly associate dispersal and survival to exogenous mechanisms such as passive drift along ocean currents. However, for tropical reef fish larvae and species in inland freshwater systems behavioural aspects of habitat selection are evidently important components of dispersal. This study is focused on larval Atlantic herring (Clupea harengus) distribution in a Baltic Sea retention area, free of lunar tides and directed current regimes, considered as a natural mesocosm...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28205221/bight-of-benin-a-maternal-perspective-of-four-beninese-populations-and-their-genetic-implications-on-the-american-populations-of-african-ancestry
#10
Giuseppina Primativo, Claudio Ottoni, Gianfranco Biondi, Sara Serafino, Cristina Martínez-Labarga, Maarten H D Larmuseau, Michele Scardi, Ronny Decorte, Olga Rickards
The understanding of the first movements of the ancestral populations within the African continent is still unclear, particularly in West Africa, due to several factors that have shaped the African genetic pool across time. To improve the genetic representativeness of the Beninese population and to better understand the patterns of human settlement inside West Africa and the dynamics of peopling of the Democratic Republic of Benin, we analyzed the maternal genetic variation of 193 Beninese individuals belonging to Bariba, Berba, Dendi, and Fon populations...
March 2017: Annals of Human Genetics
https://www.readbyqxmd.com/read/28204617/landscape-factors-influencing-stink-bug-injury-in-mid-atlantic-tomato-fields
#11
Kevin B Rice, Rachael R Troyer, Kristal M Watrous, John F Tooker, Shelby J Fleischer
No abstract text is available yet for this article.
February 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28203645/saharan-dust-detection-using-multi-sensor-satellite-measurements
#12
Sriharsha Madhavan, John J Qu, X Hao
Contemporary scientists have vested interest in trying to understand the climatology of the North Atlantic Basin since this region is considered as the genesis for hurricane formation that eventually get shipped to the tropical Atlantic region and the Caribbean. The effects of atmospheric water cycle and the climate of West Africa and the Atlantic basin are hugely impacted by the radiative forcing of Saharan dust. The focus area in this paper would be to improve the dust detection schemes by employing the use of multi sensor measurements in the thermal emissive wavelengths using legacy sensors such as Terra (T) and Aqua (A) MODerate-resolution Imaging Spectroradiometer (MODIS), fusing with Ozone Monitoring Instrument (OMI)...
February 2017: Heliyon
https://www.readbyqxmd.com/read/28203023/-randomized-controlled-trial-to-superficial-femoral-artery-recanalization-for-lower-extremity-arteriosclerosis-obliterans
#13
J M Zhuang, X Li, T R Li, J Zhao, J Y Luan, C M Wang
OBJECTIVE: To evaluate the safety and effectiveness of neglecting superficial femoral artery (SFA) recanalization for chronic lower extremity arteriosclerosis obliterans (ASO). METHODS: Thirty-six cases treated for severe stenosis or occlusion of superficial femoral artery resulted from ASO were randomly divided into 2 groups. Twenty of them were treated by endovascular reconstruction of superficial femoral artery and the other 16 cases were not treated with their superficial femoral artery, but were only treated with the accompanied iliac and/or profunda femoral artery lesion...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28202970/heinrich-events-triggered-by-ocean-forcing-and-modulated-by-isostatic-adjustment
#14
Jeremy N Bassis, Sierra V Petersen, L Mac Cathles
During the last glacial period, the Laurentide Ice Sheet sporadically discharged huge numbers of icebergs through the Hudson Strait into the North Atlantic Ocean, leaving behind distinct layers of ice-rafted debris in the ocean sediments. Perplexingly, these massive discharge events-Heinrich events-occurred during the cold portion of millennial-scale climate oscillations called Dansgaard-Oeschger cycles. This is in contrast to the expectation that ice sheets expand in colder climates and shrink in warmer climates...
February 15, 2017: Nature
https://www.readbyqxmd.com/read/28202811/small-birds-big-effects-the-little-auk-alle-alle-transforms-high-arctic-ecosystems
#15
Ivan González-Bergonzoni, Kasper L Johansen, Anders Mosbech, Frank Landkildehus, Erik Jeppesen, Thomas A Davidson
In some arctic areas, marine-derived nutrients (MDN) resulting from fish migrations fuel freshwater and terrestrial ecosystems, increasing primary production and biodiversity. Less is known, however, about the role of seabird-MDN in shaping ecosystems. Here, we examine how the most abundant seabird in the North Atlantic, the little auk (Alle alle), alters freshwater and terrestrial ecosystems around the North Water Polynya (NOW) in Greenland. We compare stable isotope ratios (δ(15)N and δ(13)C) of freshwater and terrestrial biota, terrestrial vegetation indices and physical-chemical properties, productivity and community structure of fresh waters in catchments with and without little auk colonies...
February 22, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28202040/subcellular-localization-and-interactions-of-infectious-salmon-anemia-virus-isav-m1-and-nep-as-well-as-host-hsc70
#16
Wenting Zhang, Chengzhi Cai, Li Lin, Yizhi Jane Tao, Meilin Jin
BACKGROUND: Infectious salmon anemia virus (ISAV) is an important fish pathogen that causes high mortality in farmed Atlantic salmon. The ISAV genome consists of eight single-stranded, negative-sense RNA segments. The six largest segments contain one open reading frame (ORF) each, and encode three polymerase proteins, nucleoprotein, fusion protein, and hemagglutinin esterase protein. The two smallest segments contain more than one ORF each. The segment 7 encodes non-structural protein 1 (NS1) and nuclear export protein (NEP), while segment 8 encodes matrix protein 1 and 2 (M1 and M2)...
February 15, 2017: Virology Journal
https://www.readbyqxmd.com/read/28201664/the-landscape-of-extreme-genomic-variation-in-the-highly-adaptable-atlantic-killifish
#17
Noah M Reid, Craig E Jackson, Don Gilbert, Patrick Minx, Michael J Montague, Thomas H Hampton, Lily W Helfrich, Benjamin L King, Diane E Nacci, Neel Aluru, Sibel I Karchner, John K Colbourne, Mark E Hahn, Joseph R Shaw, Marjorie F Oleksiak, Douglas L Crawford, Wesley C Warren, Andrew Whitehead
No abstract text is available yet for this article.
February 13, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28199447/population-structure-and-genetic-diversity-of-the-giant-anteater-myrmecophaga-tridactyla-myrmecophagidae-pilosa-in-brazil
#18
Camila L Clozato, Flávia R Miranda, Paula Lara-Ruiz, Rosane G Collevatti, Fabrício R Santos
The giant anteater (Myrmecophaga tridactyla, Pilosa, Linnaeus 1758) belongs to the mammalian order Pilosa and presents a large distribution along South America, occupying a great variety of habitats. It is listed in the IUCN Red List of threatened species as Vulnerable. Despite threatened, there is a lack of studies regarding its genetic variability. The aim of this study was to examine the genetic diversity and patterns of genetic structure within remaining populations. We analyzed 77 individuals from seven different populations distributed in four biomes across Brazil: Cerrado, Pantanal, Atlantic Forest and Amazon Forest...
February 13, 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28199442/phylogeographic-history-of-south-american-populations-of-the-silky-anteater-cyclopes-didactylus-pilosa-cyclopedidae
#19
Raphael Teodoro Franciscani Coimbra, Flávia Regina Miranda, Camila Clozato Lara, Marco Antônio Alves Schetino, Fabrício Rodrigues Dos Santos
Cyclopes didactylus, commonly called silky anteater, is the smallest and least studied of the anteaters. It is an arboreal species occurring in rainforests, ranging from southern Mexico to Central and South America, with an apparently disjoint distribution between Amazon and Atlantic rainforests in Brazil. Although seven subspecies are recognized, little is known about its geographical variation. Thus, to evaluate the population dynamics and evolutionary history of the South American silky anteater, we analyzed 1542 bp sequences of the mitochondrial control region (CR), COI and Cyt-b genes of 32 individuals...
February 13, 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28199332/photoperiod-regulate-gonad-development-via-kisspeptin-kissr-in-hypothalamus-and-saccus-vasculosus-of-atlantic-salmon-salmo-salar
#20
Liang Chi, Xian Li, Qinghua Liu, Ying Liu
Atlantic salmon exhibit seasonal reproduction. However, the mechanisms governing this are still unclear. Generally speaking, kisspeptin has been recognized as a regulator of reproduction. Here, we report a relationship between kisspeptin, GnRH and photoperiod in Atlantic salmon. The results demonstrated that the expression of the Atlantic salmon kisspeptin-receptor (skissr) was not always consistent with the expression pattern of Atlantic salmon GnRH3 (sGnRH3) during all developmental processes. Kisspeptin may exert its influence primarily in the early and later stages of gonad development by promoting the secretion of sGnRH3...
2017: PloS One
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