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https://www.readbyqxmd.com/read/28419691/the-low-diverse-gastric-microbiome-of-the-jellyfish-cotylorhiza-tuberculata-is-dominated-by-four-novel-taxa
#1
Tomeu Viver, Luis H Orellana, Janet K Hatt, Mercedes Urdiain, Sara Díaz, Michael Richter, Josefa Antón, Massimo Avian, Rudolf Amann, Konstantinos T Konstantinidis, Ramon Rosselló-Móra
Cotylorhiza tuberculata is an important scyphozoan jellyfish producing population blooms in the Mediterranean probably due to pelagic ecosystem's decay. Its gastric cavity can serve as a simple model of microbial - animal digestive associations, yet poorly characterized. Using state-of-the-art metagenomic population binning and catalyzed reporter deposition fluorescence in situ hybridization (CARD-FISH), we show that only four novel clonal phylotypes were consistently associated with multiple jellyfish adults...
April 17, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28388476/motile-behaviour-of-the-free-living-planktonic-ciliate-zoothamnium-pelagicum-ciliophora-peritrichia
#2
Fernando Gómez
Zoothamnium pelagicum is the only free-floating species among ∼1000 peritrich ciliates that develops its complete life cycle in the open ocean. In the NW Mediterranean Sea, Z. pelagicum was usually associated with ectobiotic bacteria, while in the South Atlantic Ocean was sometimes fouled by the diatom Licmophora. Each colony constituted a radial branch that joined at its base with other colonies to form a lens-shaped pseudocolony of up to 400 zooids. The cilia beat slowly, propelling the expanded pseudocolony in the direction of the concave face...
March 23, 2017: European Journal of Protistology
https://www.readbyqxmd.com/read/28388360/molecular-characterization-of-aspartylglucosaminidase-a-lysosomal-hydrolase-upregulated-during-strobilation-in-the-moon-jellyfish-aurelia-aurita
#3
Natsumi Tsujita, Hiroyuki Kuwahara, Hiroki Koyama, Noriyuki Yanaka, Kenji Arakawa, Hisato Kuniyoshi
The life cycle of the moon jellyfish, Aurelia aurita, alternates between a benthic asexual polyp stage and a planktonic sexual medusa (jellyfish) stage. Transition from polyp to medusa is called strobilation. To investigate the molecular mechanisms of strobilation, we screened for genes that are upregulated during strobilation using the differential display method and we identified aspartylglucosaminidase (AGA), which encodes a lysosomal hydrolase. Similar to AGAs from other species, Aurelia AGA possessed an N-terminal signal peptide and potential N-glycosylation sites...
May 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28344325/the-giant-deep-sea-octopus-haliphron-atlanticus-forages-on-gelatinous-fauna
#4
H J T Hoving, S H D Haddock
Feeding strategies and predator-prey interactions of many deep-sea pelagic organisms are still unknown. This is also true for pelagic cephalopods, some of which are very abundant in oceanic ecosystems and which are known for their elaborate behaviors and central role in many foodwebs. We report on the first observations of the giant deep-sea octopus Haliphron atlanticus with prey. Using remotely operated vehicles, we saw these giant octopods holding medusae in their arms. One of the medusae could be identified as Phacellophora camtschatica (the egg-yolk jelly)...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28343460/new-methods-of-morphometric-analyses-on-scyphozoan-jellyfish-statoliths-including-the-first-direct-evidence-for-statolith-growth-using-calcein-as-a-fluorescent-marker
#5
Ilka Sötje, Tamar Dishon, Frank Hoffmann, Sabine Holst
Statoliths are the only hard structures in the gelatinous bell of most scyphozoan medusae and investigations on these structures could promote investigations of the understudied population dynamics and phylogeny of jellyfish. We examined the statoliths of Aurelia aurita jellyfish of different ages by light microscopic and microtomographic measurements supplemented by scanning electron microscopy. The morphometric analyses confirmed that statolith numbers and sizes increase during jellyfish development and revealed that newly-formed statoliths had similar shapes that may change during statolith growth...
March 27, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28317324/big-in-the-benthos-future-change-of-seafloor-community-biomass-in-a-global-body-size-resolved-model
#6
Andrew Yool, Adrian P Martin, Thomas R Anderson, Brian J Bett, Daniel O B Jones, Henry A Ruhl
Deep-water benthic communities in the ocean are almost wholly dependent on near-surface pelagic ecosystems for their supply of energy and material resources. Primary production in sunlit surface waters is channelled through complex food webs that extensively recycle organic material, but lose a fraction as particulate organic carbon (POC) that sinks into the ocean interior. This exported production is further rarefied by microbial breakdown in the abyssal ocean, but a residual ultimately drives diverse assemblages of seafloor heterotrophs...
March 19, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28228687/reproductive-biology-and-variation-of-nuclear-ribosomal-its-and-ets-sequences-in-the-calligonum-mongolicum-complex-polygonaceae
#7
Wei Shi, Jun Wen, Yanfeng Zhao, Gabriel Johnson, Borong Pan
To explore the biosystematics of the Calligonum mongolicum complex (Polygonaceae), the flowering phenological period, breeding and pollination characters and seed set of the complex (Calligonum Mongolicum Turze, Calligonum chinense A. Los., Calligonum gobicum A. Los., Calligonum pumilum A. Los. and Calligonum zaidamense A. Los.) were documented in the Turpan Eremophyte Botanical Garden, China. The sequences of the nuclear ribosomal ITS and ETS region were employed to differentiate the Calligonum mongolicum complex and other species in sect...
2017: PhytoKeys
https://www.readbyqxmd.com/read/28213872/capulavirus-and-grablovirus-two-new-genera-in-the-family-geminiviridae
#8
Arvind Varsani, Philippe Roumagnac, Marc Fuchs, Jesús Navas-Castillo, Enrique Moriones, Ali Idris, Rob W Briddon, Rafael Rivera-Bustamante, F Murilo Zerbini, Darren P Martin
Geminiviruses are plant-infecting single-stranded DNA viruses that occur in most parts of the world. Currently, there are seven genera within the family Geminiviridae (Becurtovirus, Begomovirus, Curtovirus, Eragrovirus, Mastrevirus, Topocuvirus and Turncurtovirus). The rate of discovery of new geminiviruses has increased significantly over the last decade as a result of new molecular tools and approaches (rolling-circle amplification and deep sequencing) that allow for high-throughput workflows. Here, we report the establishment of two new genera: Capulavirus, with four new species (Alfalfa leaf curl virus, Euphorbia caput-medusae latent virus, French bean severe leaf curl virus and Plantago lanceolata latent virus), and Grablovirus, with one new species (Grapevine red blotch virus)...
February 17, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28198678/gaap-genome-organization-framework-assisted-assembly-pipeline-for-prokaryotic-genomes
#9
Lina Yuan, Yang Yu, Yanmin Zhu, Yulai Li, Changqing Li, Rujiao Li, Qin Ma, Gilman Kit-Hang Siu, Jun Yu, Taijiao Jiang, Jingfa Xiao, Yu Kang
BACKGROUND: Next-generation sequencing (NGS) technologies have greatly promoted the genomic study of prokaryotes. However, highly fragmented assemblies due to short reads from NGS are still a limiting factor in gaining insights into the genome biology. Reference-assisted tools are promising in genome assembly, but tend to result in false assembly when the assigned reference has extensive rearrangements. RESULTS: Herein, we present GAAP, a genome assembly pipeline for scaffolding based on core-gene-defined Genome Organizational Framework (cGOF) described in our previous study...
January 25, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28160447/-medusa-head-cells-starfish-cells-and-interconnecting-long-cytoplasmic-processes-as-diagnostic-cytologic-clues-for-follicular-dendritic-cell-sarcoma-in-fine-needle-aspiration-samples
#10
Agata Czapla, Reeba A Omman, Moon Woo Nam, Swati Mehrotra, Stefan E Pambuccian
No abstract text is available yet for this article.
April 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28155633/multi-car-a-tool-of-contig-scaffolding-using-multiple-references
#11
Kun-Tze Chen, Cheih-Jung Chen, Hsin-Ting Shen, Chia-Liang Liu, Shang-Hao Huang, Chin Lung Lu
BACKGROUND: A draft genome assembled by current next-generation sequencing techniques from short reads is just a collection of contigs, whose relative positions and orientations along the genome being sequenced are unknown. To further obtain its complete sequence, a contig scaffolding process is usually applied to order and orient the contigs in the draft genome. Although several single reference-based scaffolding tools have been proposed, they may produce erroneous scaffolds if there are rearrangements between the target and reference genomes or their phylogenetic relationship is distant...
December 23, 2016: BMC Bioinformatics
https://www.readbyqxmd.com/read/28052087/high-abundance-of-the-epibenthic-trachymedusa-ptychogastria-polaris-allman-1878-hydrozoa-trachylina-in-subpolar-fjords-along-the-west-antarctic-peninsula
#12
Laura J Grange, Craig R Smith, Dhugal J Lindsay, Bastian Bentlage, Marsh J Youngbluth
Medusae can be conspicuous and abundant members of seafloor communities in deep-sea benthic boundary layers. The epibenthic trachymedusa, Ptychogastria polaris Allman, 1878 (Hydrozoa: Trachylina: Ptychogastriidae) occurs in the cold, high latitude systems of both the northern and southern hemispheres, with a circumpolar distribution in Arctic and sub-Arctic areas, and disjunct reports of a few individuals from Antarctica. In January-February 2010, during benthic megafaunal photosurveys in three subpolar fjords along the West Antarctic Peninsula (Andvord, Flandres and Barilari Bays), P...
2017: PloS One
https://www.readbyqxmd.com/read/28000727/evidence-of-cnidarians-sensitivity-to-sound-after-exposure-to-low-frequency-noise-underwater-sources
#13
Marta Solé, Marc Lenoir, José Manuel Fontuño, Mercè Durfort, Mike van der Schaar, Michel André
Jellyfishes represent a group of species that play an important role in oceans, particularly as a food source for different taxa and as a predator of fish larvae and planktonic prey. The massive introduction of artificial sound sources in the oceans has become a concern to science and society. While we are only beginning to understand that non-hearing specialists like cephalopods can be affected by anthropogenic noises and regulation is underway to measure European water noise levels, we still don't know yet if the impact of sound may be extended to other lower level taxa of the food web...
December 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27994268/automated-assessment-of-joint-synovitis-activity-from-medical-ultrasound-and-power-doppler-examinations-using-image-processing-and-machine-learning-methods
#14
Rafal Cupek, Adam Ziębiński
OBJECTIVES: Rheumatoid arthritis is the most common rheumatic disease with arthritis, and causes substantial functional disability in approximately 50% patients after 10 years. Accurate measurement of the disease activity is crucial to provide an adequate treatment and care to the patients. The aim of this study is focused on a computer aided diagnostic system that supports an assessment of synovitis severity. MATERIAL AND METHODS: This paper focus on a computer aided diagnostic system that was developed within joint Polish-Norwegian research project related to the automated assessment of the severity of synovitis...
2016: Reumatologia
https://www.readbyqxmd.com/read/27992167/the-eye-of-the-medusa-xrf-imaging-reveals-unknown-traces-of-antique-polychromy
#15
Matthias Alfeld, Maud Mulliez, Philippe Martinez, Kevin Cain, Philippe Jockey, Philippe Walter
The colorful decoration of statues and buildings in antique times is commonly described by the term antique polychromy. It is well-known among scholars but less so to the general public, and its exact form is the subject of research. In this paper we discuss results obtained from the frieze of the Siphnian Treasury in the Sanctuary of Delphi (Greece). We will present the first application of a mobile instrument for macro-XRF imaging for the in situ investigation of antique polychromy and show that it allows one to identify significant traces not visible to the naked eye and not detectable by XRF spot measurements or any other mobile, noninvasive method...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/27890264/selective-suppression-of-in-situ-proliferation-of-scyphozoan-polyps-by-biofouling
#16
Song Feng, Shi-Wei Wang, Guang-Tao Zhang, Song Sun, Fang Zhang
An increase in marine artificial constructions has been proposed as a major cause of jellyfish blooms, because these constructions provide additional substrates for organisms at the benthic stage (polyps), which proliferate asexually and release a large amount of free-swimming medusae. These hard surfaces are normally covered by fouling communities, the components of which have the potential to impede the proliferation of polyps. In this study, we report an in situ experiment of polyp survival of four large scyphozoan species found in East Asian marginal seas that were exposed to biofouling, a universal phenomenon occurring on marine artificial constructions...
January 30, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27880678/evidence-for-an-alternative-mechanism-of-toxin-production-in-the-box-jellyfish-alatina-alata
#17
Cheryl Lewis Ames, Jason Macrander
Cubozoans (box jellyfish) have a reputation as the most venomous animals on the planet. Herein, we provide a review of cubozoan prey capture and digestion informed by the scientific literature. Like all cnidarians, box jellyfish envenomation originates from structures secreted within nematocyte post-Golgi vesicles called nematocysts. When tentacles come in contact with prey or would-be predators, a cocktail of toxins is rapidly deployed from nematocysts via a long spiny tubule that serves to immobilize the target organism...
November 2016: Integrative and Comparative Biology
https://www.readbyqxmd.com/read/27858592/ultrasound-guided-access-into-the-abdomen-in-the-setting-of-portal-hypertension-a-novel-technique
#18
Cory N Criss, Matthew W Ralls, Marcus D Jarboe
As the field of minimally invasive surgery rapidly evolves, there is an opportunity to adopt innovative techniques to accommodate a variety of patient populations. In patients with portal hypertension, a major risk factor upon entry into the abdomen is injury to large, engorged paraumbilical vessels in the anterior abdominal wall. Major blood loss often results from just entering the abdomen. Here, we describe a patient with caput medusae secondary to portal hypertension presenting for laparoscopic repair of a ventral hernia...
March 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/27845203/complete-mitochondrial-genome-and-evolutionary-analysis-of-turritopsis-dohrnii-the-immortal-jellyfish-with-a-reversible-life-cycle
#19
A A Lisenkova, A P Grigorenko, T V Tyazhelova, T V Andreeva, F E Gusev, A D Manakhov, A Yu Goltsov, S Piraino, M P Miglietta, E I Rogaev
Turritopsis dohrnii (Cnidaria, Hydrozoa, Hydroidolina, Anthoathecata) is the only known metazoan that is capable of reversing its life cycle via morph rejuvenation from the adult medusa stage to the juvenile polyp stage. Here, we present a complete mitochondrial (mt) genome sequence of T. dohrnii, which harbors genes for 13 proteins, two transfer RNAs, and two ribosomal RNAs. The T. dohrnii mt genome is characterized by typical features of species in the Hydroidolina subclass, such as a high A+T content (71...
November 11, 2016: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/27820907/box-jellyfish-alatina-alata-has-a-circumtropical-distribution
#20
Jonathan W Lawley, Cheryl Lewis Ames, Bastian Bentlage, Angel Yanagihara, Roger Goodwill, Ehsan Kayal, Kikiana Hurwitz, Allen G Collins
Species of the box jellyfish (Cubozoa) genus Alatina are notorious for their sting along the beaches of several localities of the Atlantic and Pacific. These species include Alatina alata on the Caribbean Island of Bonaire (the Netherlands), A. moseri in Hawaii, and A. mordens in Australia. Most cubozoans inhabit coastal waters, but Alatina is unusual in that specimens have also been collected in the open ocean at great depths. Alatina is notable in that populations form monthly aggregations for spermcast mating in conjunction with the lunar cycle...
October 2016: Biological Bulletin
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