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https://www.readbyqxmd.com/read/29051628/deadly-acute-decompression-sickness-in-risso-s-dolphins
#1
A Fernández, E Sierra, J Díaz-Delgado, S Sacchini, Y Sánchez-Paz, C Suárez-Santana, M Arregui, M Arbelo, Y Bernaldo de Quirós
Diving air-breathing vertebrates have long been considered protected against decompression sickness (DCS) through anatomical, physiological, and behavioural adaptations. However, an acute systemic gas and fat embolic syndrome similar to DCS in human divers was described in beaked whales that stranded in temporal and spatial association with military exercises involving high-powered sonar. More recently, DCS has been diagnosed in bycaught sea turtles. Both cases were linked to human activities. Two Risso's dolphin (Grampus griseus) out of 493 necropsied cetaceans stranded in the Canary Islands in a 16-year period (2000-2015), had a severe acute decompression sickness supported by pathological findings and gas analysis...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29022620/transferring-mixtures-of-chemicals-from-sediment-to-a-bioassay-using-silicone-based-passive-sampling-and-dosing
#2
Lukas Mustajärvi, Ann-Kristin Eriksson-Wiklund, Elena Gorokhova, Annika Jahnke, Anna Sobek
Environmental mixtures of chemicals consist of a countless number of compounds with unknown identity and quantity. Yet, chemical regulation is mainly built around the assessment of single chemicals. Existing frameworks for assessing the toxicity of mixtures require that both the chemical composition and quantity are known. Quantitative analyses of the chemical composition of environmental mixtures are however extremely challenging and resource-demanding. Bioassays may therefore serve as a useful approach for investigating the combined toxicity of environmental mixtures of chemicals in a cost-efficient and holistic manner...
November 15, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/29018595/assessing-the-living-and-dead-proportions-of-cold-water-coral-colonies-implications-for-deep-water-marine-protected-area-monitoring-in-a-changing-ocean
#3
Johanne Vad, Covadonga Orejas, Juan Moreno-Navas, Helen S Findlay, J Murray Roberts
Coral growth patterns result from an interplay of coral biology and environmental conditions. In this study colony size and proportion of live and dead skeletons in the cold-water coral (CWC) Lophelia pertusa (Linnaeus, 1758) were measured using video footage from Remotely Operated Vehicle (ROV) transects conducted at the inshore Mingulay Reef Complex (MRC) and at the offshore PISCES site (Rockall Bank) in the NE Atlantic. The main goal of this paper was to explore the development of a simple method to quantify coral growth and its potential application as an assessment tool of the health of these remote habitats...
2017: PeerJ
https://www.readbyqxmd.com/read/28992003/rearing-in-captivity-affects-spermatogenesis-and-sperm-quality-in-greater-amberjack-seriola-dumerili-risso-1810
#4
R Zupa, C Fauvel, C C Mylonas, C Pousis, N Santamaria, Μ Papadaki, I Fakriadis, V Cicirelli, S Mangano, L Passantino, G M Lacalandra, Aldo Corriero
The greater amberjack, (Risso, 1810), is a promising candidate for the diversification of European aquaculture production, but inconsistent reproduction in captivity prevents commercial production. Recent studies showed that greater amberjack confined in sea cages exhibited scarce gonad development and early interruption of gametogenic activity during the reproductive season. The aim of the present study was to improve our understanding of the observed impairment of spermatogenesis. Adult wild and captive-reared males were sampled during 3 different phases of the reproductive cycle: early gametogenesis (EARLY; late April to early May), advanced gametogenesis (ADVANCED; late May to early June), and spawning (SPAWNING; late June to July)...
September 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28978732/diatoms-dominate-the-eukaryotic-metatranscriptome-during-spring-in-coastal-dead-zone-sediments
#5
Elias Broman, Varvara Sachpazidou, Mark Dopson, Samuel Hylander
An important characteristic of marine sediments is the oxygen concentration that affects many central metabolic processes. There has been a widespread increase in hypoxia in coastal systems (referred to as 'dead zones') mainly caused by eutrophication. Hence, it is central to understand the metabolism and ecology of eukaryotic life in sediments during changing oxygen conditions. Therefore, we sampled coastal 'dead zone' Baltic Sea sediment during autumn and spring, and analysed the eukaryotic metatranscriptome from field samples and after incubation in the dark under oxic or anoxic conditions...
October 11, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28942081/environmental-exposure-to-organophosphorus-nerve-agents
#6
REVIEW
Slavica Vucinic, Biljana Antonijevic, Aristidis M Tsatsakis, Loukia Vassilopoulou, Anca Oana Docea, Alexander E Nosyrev, Boris N Izotov, Horst Thiermann, Nikolaos Drakoulis, Dragica Brkic
Exposure to organophosphorus nerve agents, the most deadly chemical warfare agents, is possible in a variety of situations, such as destruction of chemical warfare agents, terrorist attacks, armed conflicts or accidents in research laboratories and storage facilities. Hundreds of thousands of tons of chemical munitions were disposed of at the sea in the post World War II period, with European, Russian, Japanese and US coasts being the most affected. Sulfur mustard, Lewisite and nerve agents appear to be the most frequently chemical warfare agents disposed of at the sea...
September 7, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28901024/records-of-ocean-sunfish-mola-mola-along-the-norwegian-coast-spanning-two-centuries-1801-2015
#7
K Frafjord, T Bakken, L Kubicek, A-H Rønning, P O Syvertsen
Records of the ocean sunfish Mola mola along the Norwegian coast were compiled from all possible sources: literature, media, databases and museums. A total of 216 records were found between 1801 and 2015. They were distributed along the whole coast, except for the most north-eastern part. Nearly all years with more than five records were after 2000, with 1985 as the only exception and with a maximum of 23 records in 2014. Most, 92·4%, were from July to December. Records from before 1979 were more incidental and random and no sunfish were recorded in 54 separate years between 1879 and 2015...
September 12, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28893868/official-ers-technical-standards-global-lung-function-initiative-reference-values-for-the-carbon-monoxide-transfer-factor-for-caucasians
#8
Sanja Stanojevic, Brian L Graham, Brendan G Cooper, Bruce R Thompson, Kim W Carter, Richard W Francis, Graham L Hall
There are numerous reference equations available for the single-breath transfer factor of the lung for carbon monoxide (T LCO); however, it is not always clear which reference set should be used in clinical practice. The aim of the study was to develop the Global Lung Function Initiative (GLI) all-age reference values for T LCOData from 19 centres in 14 countries were collected to define T LCO reference values. Similar to the GLI spirometry project, reference values were derived using the LMS (lambda, mu, sigma) method and the GAMLSS (generalised additive models for location, scale and shape) programme in R...
September 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28888124/sperm-viability-assessment-in-marine-invertebrates-by-fluorescent-staining-and-spectrofluorimetry-a-promising-tool-for-assessing-marine-pollution-impact
#9
Alessandra Gallo, Raffaele Boni, Elisabetta Tosti
The viability of spermatozoa is a crucial parameter to evaluate their quality that is an important issue in ecotoxicological studies. Here, a new method has been developed to rapidly determine the viability of spermatozoa in three marine invertebrates: the ascidian Ciona intestinalis, the sea urchin Paracentrotus lividus and the mollusc Mytilus galloprovincialis. This method employed the dual DNA fluorescent staining coupled with spectrofluorimetric analysis. The dual fluorescent staining used the SYBR-14 stained live spermatozoa and propidium iodide stained degenerated cells that had lost membrane integrity...
January 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28843531/testing-lagoonal-sediments-with-early-life-stages-of-the-copepod-acartia-tonsa-dana-an-approach-to-assess-sediment-toxicity-in-the-venice-lagoon
#10
Marco Picone, Martina Bergamin, Eugenia Delaney, Annamaria Volpi Ghirardini, Kresten Ole Kusk
The early-life stages of development of the calanoid copepod Acartia tonsa from egg to copepodite I is proposed as an endpoint for assessing sediment toxicity by exposing newly released eggs directly onto the sediment-water interface. A preliminary study of 5 sediment samples collected in the lagoon of Venice highlighted that the larval development rate (LDR) and the early-life stages (ELS) mortality endpoints with A. tonsa are more sensitive than the standard amphipod mortality test; moreover LDR resulted in a more reliable endpoint than ELS mortality, due to the interference of the sediment with the recovery of unhatched eggs and dead larvae...
January 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28815268/temporal-stability-of-the-healthy-human-skin-microbiome-following-dead-sea-climatotherapy
#11
Michael Brandwein, Garold Fuks, Avigail Israel, Ashraf Al-Ashhab, Deborah Rosenberg-Nejman, Ravid Straussman, Emmilia Hodak, Marco Harari, Doron Steinberg, Zvi Bentwich, Noam Shental, Shiri Meshner
Dead Sea climatotherapy (DSC) is a therapeutic modality for a variety of chronic skin conditions, yet there has been scarce research on the relationship between the cutaneous microbiota and disease states in response to DSC. We characterized the skin bacterial and fungal microbiome of healthy volunteers who underwent DSC. Bacterial community diversity remained similar before and after treatment, while fungal diversity was significantly reduced as a result of the treatment. Individuals showed greater inter-individual than temporal bacterial community variance, yet the opposite was true for fungal community composition...
August 17, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/28806635/oryong-501-sinking-incident-in-the-bering-sea-international-dvi-cooperation-in-the-asia-pacific
#12
Nak-Eun Chung, Anton Castilani, Wilfredo E Tierra, Philip Beh, Mohd Shah Mahmood
On December 1st, 2014, the sinking of Oryong 501 occurred in the Bering Sea off the east coast of Russia. A total of 60 crew members, including 35 Indonesians, 13 Filipinos, 11 South Koreans and 1 Russian inspector were on board out of which only seven survived. Through an international rescue operation, the dead bodies of 27 were found and the remaining 26 crew are still missing. After transferring the dead bodies to the Busan Harbor in South Korea, the operation to identify the deceased began involving DVI teams from three countries: Korea, Indonesia and the Philippines...
September 2017: Forensic Science International
https://www.readbyqxmd.com/read/28800537/lead-exposure-in-raptors-from-japan-and-source-identification-using-pb-stable-isotope-ratios
#13
Chihiro Ishii, Shouta M M Nakayama, Yoshinori Ikenaka, Hokuto Nakata, Keisuke Saito, Yukiko Watanabe, Hazuki Mizukawa, Shinsuke Tanabe, Kei Nomiyama, Terutake Hayashi, Mayumi Ishizuka
Lead (Pb) poisoning is widespread among raptors and water birds. In Japan, fragments of Pb ammunition are still found in endangered eagles although more than 10 years have passed since legislation regarding use of Pb ammunition was introduced. This study was performed to investigate Pb exposure in raptors from various locations in Japan. We measured hepatic and renal Pb concentrations and hepatic Pb isotope ratios of Steller's sea eagles (Haliaeetus pelagicus), white-tailed sea eagles (Haliaeetus albicilla), golden eagles (Aquila chrysaetos), and 13 other species (total 177 individuals) that were found dead, as well as blood samples from three eagles found in a weakened state during 1993-2015 from Hokkaido (northern part), Honshu (the main island), and Shikoku (a southern island) of Japan...
November 2017: Chemosphere
https://www.readbyqxmd.com/read/28793929/shifts-in-coastal-sediment-oxygenation-cause-pronounced-changes-in-microbial-community-composition-and-associated-metabolism
#14
Elias Broman, Johanna Sjöstedt, Jarone Pinhassi, Mark Dopson
BACKGROUND: A key characteristic of eutrophication in coastal seas is the expansion of hypoxic bottom waters, often referred to as 'dead zones'. One proposed remediation strategy for coastal dead zones in the Baltic Sea is to mix the water column using pump stations, circulating oxygenated water to the sea bottom. Although microbial metabolism in the sediment surface is recognized as key in regulating bulk chemical fluxes, it remains unknown how the microbial community and its metabolic processes are influenced by shifts in oxygen availability...
August 9, 2017: Microbiome
https://www.readbyqxmd.com/read/28769713/search-for-mesophotic-octocorals-cnidaria-anthozoa-and-their-phylogeny-i-a-new-sclerite-free-genus-from-eilat-northern-red-sea
#15
Yehuda Benayahu, Catherine S McFadden, Erez Shoham
This communication describes a new octocoral, Altumia delicatagen. n. & sp. n. (Octocorallia: Clavulariidae), from mesophotic reefs of Eilat (northern Gulf of Aqaba, Red Sea). This species lives on dead antipatharian colonies and on artificial substrates. It has been recorded from deeper than 60 m down to 140 m and is thus considered to be a lower mesophotic octocoral. It has no sclerites and features no symbiotic zooxanthellae. The new genus is compared to other known sclerite-free octocorals. Molecular phylogenetic analyses place it in a clade with members of families Clavulariidae and Acanthoaxiidae, and for now we assign it to the former, based on colony morphology...
2017: ZooKeys
https://www.readbyqxmd.com/read/28763937/lethal-and-sub-lethal-effects-of-commonly-used-anti-sea-lice-formulations-on-non-target-crab-metacarcinus-edwardsii-larvae
#16
Paulina Gebauer, Kurt Paschke, Claudia Vera, Jorge E Toro, Miguel Pardo, Mauricio Urbina
The pesticides used by the salmon industry to treat sea lice, are applied in situ via a bath solution and are subsequently discharged into the surrounding medium. The effects of cypermethrin, deltamethrin, azamethiphos and hydrogen peroxide were assessed on the performance of Metacarcinus edwardsii larvae, an important crab for Chilean fishery. All larvae were dead or dying after 30 min of exposure to cypermethrin and after 40 min to deltamethrin at concentrations 100 and 20 times lower (0.15 and 0.1 μg L(-1), respectively) than the concentrations and exposure times recommended by the manufacturers (CRM) to treat sea lice...
October 2017: Chemosphere
https://www.readbyqxmd.com/read/28746410/environmental-factors-influencing-the-spatio-temporal-distribution-of-carybdea-marsupialis-lineo-1978-cubozoa-in-south-western-mediterranean-coasts
#17
Antonio Canepa, Verónica Fuentes, Mar Bosch-Belmar, Melissa Acevedo, Kilian Toledo-Guedes, Antonio Ortiz, Elia Durá, César Bordehore, Josep-Maria Gili
Jellyfish blooms cause important ecological and socio-economic problems. Among jellyfish, cubozoans are infamous for their painful, sometimes deadly, stings and are a major public concern in tropical to subtropical areas; however, there is little information about the possible causes of their outbreaks. After a bloom of the cubomedusa Carybdea marsupialis (Carybdeidae) along the coast of Denia (SW Mediterranean, Spain) in 2008 with negative consequences for local tourism, the necessity to understand the ecological restrictions on medusae abundance was evident...
2017: PloS One
https://www.readbyqxmd.com/read/28737483/tissue-lesions-due-to-spirorchiid-eggs-in-a-loggerhead-turtle-caretta-caretta-linnaeus-1758-from-brazil-the-first-report-outside-of-the-usa
#18
Rachel Bittencourt Ribeiro, Hassan Jerdy, Raphael Mansur Medina, Mariah Bianchi, Max Werneck, Eulógio Carvalho
Spirorchiids (family Spirorchiidae Stunkard 1921) are a group of flukes that inhabit the circulatory system of turtles. Infection by members of the family Spirorchiidae involves egg deposition in the host blood stream, accumulation in tissues, which cause inflammatory reactions and embolisms, leading or contributing to the death of the host. Reports of Spirorchiids eggs lesions on loggerhead turtle (Caretta caretta Linnaeus, 1758) were observed only in the USA hosts. In the present report a female loggerhead sea turtle was found dead on the beach in north State of Rio de Janeiro, Brazil...
July 24, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28715291/isolation-of-brucella-pinnipedialis-from-grey-seals-halichoerus-grypus-in-the-baltic-sea
#19
Varpu Hirvelä-Koski, Minna Nylund, Teresa Skrzypczak, Petra Heikkinen, Kaarina Kauhala, Maryne Jay, Marja Isomursu
Brucella infection in seals was reported for the first time in 1994 around the coast of Scotland. Since then, marine mammal Brucella infections were found to be widely distributed in the northern hemisphere. Two Brucella species affect marine mammals: Brucella pinnipedialis in pinnipeds and Brucella ceti in cetaceans. We examined the livers of Baltic grey seals (Halichoerus grypus) from the Finnish coast (n=122) hunted, found dead, or killed as by-catch in fishing gear in 2013-15 as part of population health monitoring...
October 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28711007/carbon-dynamics-in-a-late-quaternary-age-coastal-limestone-aquifer-system-undergoing-saltwater-intrusion
#20
Eliza Bryan, Karina T Meredith, Andy Baker, Martin S Andersen, Vincent E A Post
This study investigates the inorganic and organic aspects of the carbon cycle in groundwaters throughout the freshwater lens and transition zone of a carbonate island aquifer and identifies the transformation of carbon throughout the system. We determined (14)C and (13)C carbon isotope values for both DIC and DOC in groundwaters, and investigated the composition of DOC throughout the aquifer. In combination with hydrochemical and (3)H measurements, the chemical evolution of groundwaters was then traced from the unsaturated zone to the deeper saline zone...
December 31, 2017: Science of the Total Environment
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