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https://www.readbyqxmd.com/read/28425503/nerve-degeneration-and-regeneration-in-the-cephalopod-mollusc-octopus-vulgaris-the-case-of-the-pallial-nerve
#1
Pamela Imperadore, Sameer B Shah, Helen P Makarenkova, Graziano Fiorito
Regeneration is a process that restores structure and function of tissues damaged by injury or disease. In mammals complete regeneration is often unsuccessful, while most of the low phyla animals can re-grow many parts of their body after amputation. Cephalopod molluscs, and in particular Octopus vulgaris, are well known for their capacity to regenerate their arms and other body parts, including central and peripheral nervous system. To better understand the mechanism of recovery following nerve injury in this species we investigated the process of axon regrowth and nerve regeneration after complete transection of the Octopus pallial nerves...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28420879/evolutionary-genetics-fantastic-beasts-cephalopod-rna-recoding
#2
Shimona Starling
No abstract text is available yet for this article.
April 19, 2017: Nature Reviews. Genetics
https://www.readbyqxmd.com/read/28401960/sperm-whale-long-range-echolocation-sounds-revealed-by-antares-a-deep-sea-neutrino-telescope
#3
M André, A Caballé, M van der Schaar, A Solsona, L Houégnigan, S Zaugg, A M Sánchez, J V Castell, M Solé, F Vila, D Djokic, S Adrián-Martínez, A Albert, M Anghinolfi, G Anton, M Ardid, J-J Aubert, T Avgitas, B Baret, J Barrios-Martí, S Basa, V Bertin, S Biagi, R Bormuth, M C Bouwhuis, R Bruijn, J Brunner, J Busto, A Capone, L Caramete, J Carr, S Celli, T Chiarusi, M Circella, A Coleiro, R Coniglione, H Costantini, P Coyle, A Creusot, A Deschamps, G De Bonis, C Distefano, I Di Palma, C Donzaud, D Dornic, D Drouhin, T Eberl, I El Bojaddaini, D Elsässer, A Enzenhöfer, K Fehn, I Felis, L A Fusco, S Galatà, P Gay, S Geißelsöder, K Geyer, V Giordano, A Gleixner, H Glotin, R Gracia-Ruiz, K Graf, S Hallmann, H van Haren, A J Heijboer, Y Hello, J J Hernandez-Rey, J Hößl, J Hofestädt, C Hugon, G Illuminati, C W James, M de Jong, M Jongen, M Kadler, O Kalekin, U Katz, D Kießling, A Kouchner, M Kreter, I Kreykenbohm, V Kulikovskiy, C Lachaud, R Lahmann, D Lefèvre, E Leonora, S Loucatos, M Marcelin, A Margiotta, A Marinelli, J A Martínez-Mora, A Mathieu, K Melis, T Michael, P Migliozzi, A Moussa, C Mueller, E Nezri, G E Păvălaş, C Pellegrino, C Perrina, P Piattelli, V Popa, T Pradier, C Racca, G Riccobene, K Roensch, M Saldaña, D F E Samtleben, M Sanguineti, P Sapienza, J Schnabel, F Schüssler, T Seitz, C Sieger, M Spurio, Th Stolarczyk, A Sánchez-Losa, M Taiuti, A Trovato, M Tselengidou, D Turpin, C Tönnis, B Vallage, C Vallée, V Van Elewyck, D Vivolo, S Wagner, J Wilms, J D Zornoza, J Zuñiga
Despite dedicated research has been carried out to adequately map the distribution of the sperm whale in the Mediterranean Sea, unlike other regions of the world, the species population status is still presently uncertain. The analysis of two years of continuous acoustic data provided by the ANTARES neutrino telescope revealed the year-round presence of sperm whales in the Ligurian Sea, probably associated with the availability of cephalopods in the region. The presence of the Ligurian Sea sperm whales was demonstrated through the real-time analysis of audio data streamed from a cabled-to-shore deep-sea observatory that allowed the hourly tracking of their long-range echolocation behaviour on the Internet...
April 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28388405/trade-off-between-transcriptome-plasticity-and-genome-evolution-in-cephalopods
#4
Noa Liscovitch-Brauer, Shahar Alon, Hagit T Porath, Boaz Elstein, Ron Unger, Tamar Ziv, Arie Admon, Erez Y Levanon, Joshua J C Rosenthal, Eli Eisenberg
RNA editing, a post-transcriptional process, allows the diversification of proteomes beyond the genomic blueprint; however it is infrequently used among animals for this purpose. Recent reports suggesting increased levels of RNA editing in squids thus raise the question of the nature and effects of these events. We here show that RNA editing is particularly common in behaviorally sophisticated coleoid cephalopods, with tens of thousands of evolutionarily conserved sites. Editing is enriched in the nervous system, affecting molecules pertinent for excitability and neuronal morphology...
April 6, 2017: Cell
https://www.readbyqxmd.com/read/28378762/offshore-exposure-experiments-on-cuttlefish-indicate-received-sound-pressure-and-particle-motion-levels-associated-with-acoustic-trauma
#5
Marta Solé, Peter Sigray, Marc Lenoir, Mike van der Schaar, Emilia Lalander, Michel André
Recent findings on cephalopods in laboratory conditions showed that exposure to artificial noise had a direct consequence on the statocyst, sensory organs, which are responsible for their equilibrium and movements in the water column. The question remained about the contribution of the consequent near-field particle motion influence from the tank walls, to the triggering of the trauma. Offshore noise controlled exposure experiments (CEE) on common cuttlefish (Sepia officinalis), were conducted at three different depths and distances from the source and particle motion and sound pressure measurements were performed at each location...
April 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28373845/perfused-gills-reveal-fundamental-principles-of-ph-regulation-and-ammonia-homeostasis-in-the-cephalopod-octopus-vulgaris
#6
Marian Y Hu, Po-Hsuan Sung, Ying-Jey Guh, Jay-Ron Lee, Pung-Pung Hwang, Dirk Weihrauch, Yung-Che Tseng
In contrast to terrestrial animals most aquatic species can be characterized by relatively higher blood [Formula: see text] concentrations despite its potential toxicity to the central nervous system. Although many aquatic species excrete [Formula: see text] via specialized epithelia little information is available regarding the mechanistic basis for NH3/[Formula: see text] homeostasis in molluscs. Using perfused gills of Octopus vulgaris we studied acid-base regulation and ammonia excretion pathways in this cephalopod species...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28372850/effects-of-prey-characteristics-on-the-feeding-behaviors-of-an-apex-marine-predator-the-california-moray-gymnothorax-mordax
#7
Amber R Diluzio, Vikram B Baliga, Benjamin A Higgins, Rita S Mehta
Moray eels comprise a large radiation of elongate marine predators that are thought to swallow large prey whole but also circumvent gape constraints by manipulating prey into more manageable pieces. Prey manipulation behaviors include shaking, rotation, knotting, and ramming prey against another object to assist in swallowing. Most morays feed on a wide variety of prey that vary in mechanical properties such as stiffness and toughness, which could potentially affect feeding behaviors. There is little diet data informing us of the maximum prey size morays can swallow whole and whether maximum prey size differs between prey types...
March 8, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28347904/bioaccumulation-and-biomagnification-of-ultraviolet-absorbents-in-marine-wildlife-of-the-pearl-river-estuarine-south-china-sea
#8
Xianzhi Peng, Yujuan Fan, Jiabin Jin, Songsong Xiong, Jun Liu, Caiming Tang
Bioaccumulation and trophic transfer in ecosystems is an important criterion for assessing environmental risks of contaminants. This study investigated bioaccumulation and biomagnification of 13 organic ultraviolet absorbents (UVAs) in marine wildlife organisms in the Pearl River Estuary, South China Sea. The UVAs could accumulate in the organisms with biota - sediment accumulation factors (BSAF) of 0.003-2.152. UV531 was the most abundant and showed the highest tendency to accumulate in the organisms with a median BSAF of 1...
March 24, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28344325/the-giant-deep-sea-octopus-haliphron-atlanticus-forages-on-gelatinous-fauna
#9
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/28341528/molecular-diagnosis-of-allergy-to-anisakis-simplex-and-gymnorhynchus-gigas-fish-parasites
#10
A Armentia, J Santos, Z Serrano, B Martín, S Martín, J Barrio, S Fernández, M González-Sagrado, F Pineda, R Palacios
BACKGROUND: There has been an increase in the prevalence of hypersensitivity to Anisakis simplex. There are fish parasites other than Anisakis simplex whose allergenicity has not yet been studied. OBJECTIVE: To assess IgE hypersensitivity caused by fish parasite allergens in patients with gastro-allergic symptoms after consumption of fish, shellfish or cephalopods, compared with healthy subjects, pollen allergic individuals and children with digestive symptoms after eating marine food...
March 21, 2017: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/28335553/biosynthesis-of-polyunsaturated-fatty-acids-in-octopus-vulgaris-molecular-cloning-and-functional-characterisation-of-a-stearoyl-coa-desaturase-and-an-elongation-of-very-long-chain-fatty-acid-4-protein
#11
Óscar Monroig, Rosa de Llanos, Inmaculada Varó, Francisco Hontoria, Douglas R Tocher, Sergi Puig, Juan C Navarro
Polyunsaturated fatty acids (PUFAs) have been acknowledged as essential nutrients for cephalopods but the specific PUFAs that satisfy the physiological requirements are unknown. To expand our previous investigations on characterisation of desaturases and elongases involved in the biosynthesis of PUFAs and hence determine the dietary PUFA requirements in cephalopods, this study aimed to investigate the roles that a stearoyl-CoA desaturase (Scd) and an elongation of very long-chain fatty acid 4 (Elovl4) protein play in the biosynthesis of essential fatty acids (FAs)...
March 21, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28298896/spotmetrics-an-open-source-image-analysis-software-plugin-for-automatic-chromatophore-detection-and-measurement
#12
Stavros P Hadjisolomou, George El-Haddad
Coleoid cephalopods (squid, octopus, and sepia) are renowned for their elaborate body patterning capabilities, which are employed for camouflage or communication. The specific chromatic appearance of a cephalopod, at any given moment, is a direct result of the combined action of their intradermal pigmented chromatophore organs and reflecting cells. Therefore, a lot can be learned about the cephalopod coloration system by video recording and analyzing the activation of individual chromatophores in time. The fact that adult cephalopods have small chromatophores, up to several hundred thousand in number, makes measurement and analysis over several seconds a difficult task...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28290697/seafood-identification-in-multispecies-products-assessment-of-16srrna-cytb-and-coi-universal-primers-efficiency-as-a-preliminary-analytical-step-for-setting-up-metabarcoding-next-generation-sequencing-techniques
#13
Alice Giusti, Lara Tinacci, Carmen G Sotelo, Martina Marchetti, Alessandra Guidi, Wenjie Zheng, Andrea Armani
Few studies applying NGS have been conducted in the food inspection field, particularly on multispecies seafood products. A preliminary study screening the performance and the potential application in NGS analysis of 14 "universal primers" amplifying 16SrRNA, cytb, and COI genes in fish and cephalopods was performed. Species used in surimi preparation were chosen as target. An in silico analysis was conducted to test primers' coverage capacity by assessing mismatches (number and position) with the target sequences...
March 23, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28278369/single-and-multiple-mating-reduces-longevity-of-female-dumpling-squid-euprymna-tasmanica
#14
Amanda M Franklin, Devi Stuart-Fox
For many species, mating is a necessary yet costly activity. The costs involved can have an important influence on the evolution of life histories and senescence. Females of many species mate multiply and this behaviour can inflict a longevity cost. Most studies investigating the effects of multiple mating on female survival have been conducted on insects and the effects in other taxa are largely unknown. We investigate the effects of both a single mating and a second mating on longevity in female dumpling squid (Euprymna tasmanica), a species in which both sexes mate multiply...
March 9, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28263544/smart-actuators-and-adhesives-for-reconfigurable-matter
#15
Hyunhyub Ko, Ali Javey
Biological systems found in nature provide excellent stimuli-responsive functions. The camouflage adaptation of cephalopods (octopus, cuttlefish), rapid stiffness change of sea cucumbers, opening of pine cones in response to humidity, and rapid closure of Venus flytraps upon insect touch are some examples of nature's smart systems. Although current technologies are still premature to mimic these sophisticated structures and functions in smart biological systems, recent work on stimuli-responsive programmable matter has shown great progress...
March 6, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28253300/the-pax-gene-family-highlights-from-cephalopods
#16
Sandra Navet, Auxane Buresi, Sébastien Baratte, Aude Andouche, Laure Bonnaud-Ponticelli, Yann Bassaglia
Pax genes play important roles in Metazoan development. Their evolution has been extensively studied but Lophotrochozoa are usually omitted. We addressed the question of Pax paralog diversity in Lophotrochozoa by a thorough review of available databases. The existence of six Pax families (Pax1/9, Pax2/5/8, Pax3/7, Pax4/6, Paxβ, PoxNeuro) was confirmed and the lophotrochozoan Paxβ subfamily was further characterized. Contrary to the pattern reported in chordates, the Pax2/5/8 family is devoid of homeodomain in Lophotrochozoa...
2017: PloS One
https://www.readbyqxmd.com/read/28250188/molecular-clocks-indicate-turnover-and-diversification-of-modern-coleoid-cephalopods-during-the-mesozoic-marine-revolution
#17
Alastair R Tanner, Dirk Fuchs, Inger E Winkelmann, M Thomas P Gilbert, M Sabrina Pankey, Ângela M Ribeiro, Kevin M Kocot, Kenneth M Halanych, Todd H Oakley, Rute R da Fonseca, Davide Pisani, Jakob Vinther
Coleoid cephalopod molluscs comprise squid, cuttlefish and octopuses, and represent nearly the entire diversity of modern cephalopods. Sophisticated adaptations such as the use of colour for camouflage and communication, jet propulsion and the ink sac highlight the unique nature of the group. Despite these striking adaptations, there are clear parallels in ecology between coleoids and bony fishes. The coleoid fossil record is limited, however, hindering confident analysis of the tempo and pattern of their evolution...
March 15, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28248970/an-eocene-orthocone-from-antarctica-shows-convergent-evolution-of-internally-shelled-cephalopods
#18
Larisa A Doguzhaeva, Stefan Bengtson, Marcelo A Reguero, Thomas Mörs
BACKGROUND: The Subclass Coleoidea (Class Cephalopoda) accommodates the diverse present-day internally shelled cephalopod mollusks (Spirula, Sepia and octopuses, squids, Vampyroteuthis) and also extinct internally shelled cephalopods. Recent Spirula represents a unique coleoid retaining shell structures, a narrow marginal siphuncle and globular protoconch that signify the ancestry of the subclass Coleoidea from the Paleozoic subclass Bactritoidea. This hypothesis has been recently supported by newly recorded diverse bactritoid-like coleoids from the Carboniferous of the USA, but prior to this study no fossil cephalopod indicative of an endochochleate branch with an origin independent from subclass Bactritoidea has been reported...
2017: PloS One
https://www.readbyqxmd.com/read/28246643/unexpected-early-triassic-marine-ecosystem-and-the-rise-of-the-modern-evolutionary-fauna
#19
Arnaud Brayard, L J Krumenacker, Joseph P Botting, James F Jenks, Kevin G Bylund, Emmanuel Fara, Emmanuelle Vennin, Nicolas Olivier, Nicolas Goudemand, Thomas Saucède, Sylvain Charbonnier, Carlo Romano, Larisa Doguzhaeva, Ben Thuy, Michael Hautmann, Daniel A Stephen, Christophe Thomazo, Gilles Escarguel
In the wake of the end-Permian mass extinction, the Early Triassic (~251.9 to 247 million years ago) is portrayed as an environmentally unstable interval characterized by several biotic crises and heavily depauperate marine benthic ecosystems. We describe a new fossil assemblage-the Paris Biota-from the earliest Spathian (middle Olenekian, ~250.6 million years ago) of the Bear Lake area, southeastern Idaho, USA. This highly diversified assemblage documents a remarkably complex marine ecosystem including at least seven phyla and 20 distinct metazoan orders, along with algae...
February 2017: Science Advances
https://www.readbyqxmd.com/read/28241059/exceptionally-prolonged-tooth-formation-in-elasmosaurid-plesiosaurians
#20
Benjamin P Kear, Dennis Larsson, Johan Lindgren, Martin Kundrát
Elasmosaurid plesiosaurians were globally prolific marine reptiles that dominated the Mesozoic seas for over 70 million years. Their iconic body-plan incorporated an exceedingly long neck and small skull equipped with prominent intermeshing 'fangs'. How this bizarre dental apparatus was employed in feeding is uncertain, but fossilized gut contents indicate a diverse diet of small pelagic vertebrates, cephalopods and epifaunal benthos. Here we report the first plesiosaurian tooth formation rates as a mechanism for servicing the functional dentition...
2017: PloS One
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