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Water for recreational use

Carl G Meyer, James M Anderson, Daniel M Coffey, Melanie R Hutchinson, Mark A Royer, Kim N Holland
We compared tiger shark (Galeocerdo cuvier) spatial behaviour among 4 Hawaiian Islands to evaluate whether local patterns of movement could explain higher numbers of shark bites seen around Maui than other islands. Our sample consisted of 96 electronically-tagged (satellite and acoustic transmitters) tiger sharks, individually tracked for up to 6 years. Most individuals showed fidelity to a specific 'home' island, but also swam between islands and sometimes ranged far (up to 1,400 km) offshore. Movements were primarily oriented to insular shelf habitat (0-200 m depth) in coastal waters, and individual sharks utilized core-structured home ranges within this habitat...
March 21, 2018: Scientific Reports
Nora Claire Niehus, Carolin Floeter, Henner Hollert, Gesine Witt
In this study the miniaturised Marine Algae Test (mMAT) using passive dosing was developed based on the ISO EN DIN10253 to investigate the growth inhibition of the marine diatom Phaeodactylum tricornutum caused by polycyclic aromatic hydrocarbons (PAHs). Risk assessment of hydrophobic organic compounds (HOCs) like PAHs in aquatic toxicity tests is very difficult due to their low aqueous solubilities, losses via sorption to the wells and volatilisation. However, passive dosing can overcome these challenges. In this study biocompatible silicone O-rings were used as PAH reservoir...
March 9, 2018: Aquatic Toxicology
Diego Averaldo Guiguet Leal, Doris Sobral Marques Souza, Karin Silva Caumo, Gislaine Fongaro, Lua Ferreira Panatieri, Maurício Durigan, Marilise Brittes Rott, Célia Regina Monte Barardi, Regina Maura Bueno Franco
Waterborne, food-borne and sewage-borne pathogens are a major global concern, with the annual recurrence, most notably during the summer, of outbreaks of gastroenteritis of unconfirmed etiology associated with recreational activities in marine environments. The consumption of contaminated water-based foodstuffs is also related to outbreaks of human illness. The main goals of the present study were: i) to identify the genetic assemblages of Giardia duodenalis cysts in growing and depurated oysters destined for human consumption on the southern coast of São Paulo, Brazil; ii) to verify the main circulating G...
March 9, 2018: Water Research
Girish Choppala, Ellen Moon, Richard Bush, Nanthi Bolan, Neil Carroll
The increased use of estuarine waters for commercial and recreational activities is one consequence of urbanisation. Western Australia's Peel-Harvey Estuary highlights the impacts of urbanisation, with a rapidly developing boating industry and periodic dredging activity. The aim of this research is to evaluate the potential mobility of nutrients and trace elements during dredging, and the influence of flocculation on iron and sulfur partitioning in iron monosulfide enriched sediments. Our findings indicate a short-term increase in nitrate, phosphate and ammonium, during dredging through the resuspension of sediments...
February 19, 2018: Chemosphere
Tracey M Dalton, Di Jin
This study explores public interests associated with shellfish aquaculture development in coastal waters of Rhode Island (US). Specifically, we examine (1) the levels of public support for (or opposition to) shellfish aquaculture development and (2) factors driving the levels of support, using survey data and ordinal logistic regressions. Results of the analysis identify several key attitudinal factors affecting individual's support for shellfish aquaculture in Rhode Island (RI). The level of support is positively associated with attitudes related to shellfish aquaculture's benefits to the local economy and its role as a nutritional food option, and negatively influenced by attitudes related to aquaculture farms' effects on aesthetic quality and their interference with other uses...
March 5, 2018: Environmental Management
Joshua A Steele, A Denene Blackwood, John F Griffith, Rachel T Noble, Kenneth C Schiff
Along southern California beaches, the concentrations of fecal indicator bacteria (FIB) used to quantify the potential presence of fecal contamination in coastal recreational waters have been previously documented to be higher during wet weather conditions (typically winter or spring) than those observed during summer dry weather conditions. FIB are used for management of recreational waters because measurement of the bacterial and viral pathogens that are the potential causes of illness in beachgoers exposed to stormwater can be expensive, time-consuming, and technically difficult...
March 1, 2018: Water Research
A Polkowska, S Räsänen, H Al-Hello, M Bojang, O Lyytikäinen, J P Nuorti, K Jalava
In July 2014, an outbreak of gastroenteritis occurred among visitors to lakes in Tampere, Finland. We conducted a retrospective cohort study using an internet-based survey, solicited by public announcement, to identify source of infection and to implement control measures. Of 1453 persons enrolled in the study, 244 met the case definition (attack rate, 17%). In the pooled univariate analysis, risk factors for gastroenteritis included getting water in the mouth while swimming (Risk ratio (RR) 3.32; 95% Confidence interval (CI), 2...
February 26, 2018: Epidemiology and Infection
Maria Lagerström, J Fredrik Lindgren, Albin Holmqvist, Mia Dahlström, Erik Ytreberg
Antifouling paints are environmentally risk assessed based on their biocidal release rates to the water phase. In situ release rates of copper (Cu) and zinc (Zn) were derived for five commercial paints in two recreational marinas with different salinities (5 and 14 PSU) using an X-Ray Fluorescence spectrometer (XRF). Salinity was found to significantly affect the Cu release, with twice the amount of Cu released at the higher salinity, while its influence on the Zn release was paint-specific. Site-specific release rates for water bodies with salinity gradients, e...
February 2018: Marine Pollution Bulletin
Jianyong Wu, Jill R Stewart, Mark D Sobsey, Chris Cormency, Michael B Fisher, Jamie K Bartram
Methods for rapid detection of fecal indicator bacteria in water are important to ensure that water is safe for drinking, bathing, recreation, fishing and shellfish harvesting. In this study, we tested experimental conditions for bacterial hydrolysis of two promising enzymatic substrates, 5-Bromo-4-chloro-3-indolyl β-D-glucuronide (X-Gluc) and Resorufin β-D-glucuronide (REG), and optimized parameters such as temperature and pH to determine conditions for rapid reactions. We then innovated a membrane filter-based approach to facilitate more rapid enzyme-based detection of Escherichia coli in water based on the combination of an initial concentration step and optimized test conditions...
February 21, 2018: Current Microbiology
Nicola Pratt, Sreekumari Rajeev
This systematic review summarises the data published on the Leptospira seroprevalence, serovar diversity and distribution among animal species in the Caribbean region. Following Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines, and checklist, relevant articles were identified and data were extracted and recorded. The review provided Leptospira seroprevalence data from 16 Caribbean islands (Barbados, Trinidad, Grenada, Puerto Rico, Saint Croix, St. Kitts and Nevis, Jamaica, Antigua, Carriacou, Dominica, Guadalupe, Martinique, Monserrat, St...
February 16, 2018: Acta Tropica
Gerardo Bosco, Alex Rizzato, Richard E Moon, Enrico M Camporesi
Man's experience and exploration of the underwater environment has been recorded from ancient times and today encompasses large sections of the population for sport enjoyment, recreational and commercial purpose, as well as military strategic goals. Knowledge, respect and maintenance of the underwater world is an essential development for our future and the knowledge acquired over the last few dozen years will change rapidly in the near future with plans to establish secure habitats with specific long-term goals of exploration, maintenance and survival...
2018: Frontiers in Psychology
Sarai Pouso, María C Uyarra, Ángel Borja
In Europe, the quality of coastal bathing waters improved considerably in the last decades, mainly due to the more demanding legislation and the adoption of water sanitation plans. In the Nerbioi estuary (North Spain), the Wastewater Treatment Plan implemented between 1990 and 2001 resulted on an abrupt decrease in microbial concentration; thus, complying with bathing waters legislation and allowing recreational activities again in the three beaches of the estuary. However, little is known about how improvements in bathing waters influences the provision of cultural ecosystem services and human well-being...
February 15, 2018: Journal of Environmental Management
Jennifer P Pascali, Paolo Fais, Fabio Vaiano, Nicola Pigaiani, Stefano D'Errico, Sandra Furlanetto, Diego Palumbo, Elisabetta Bertol
Drug tampering practices, with the aim to increase availability of drug delivery and/or enhance drug effects, are accessible on Internet and are practiced by some portion of recreational drug users. Not rarely, recreational misuse may result in toxic and even fatal results. The aim of the present study was to assess the tampering risk of medicaments containing different formulations of an opioid in combination with paracetamol or dexketoprofen, following the procedures reported in dedicated forums on the web...
February 10, 2018: Journal of Pharmaceutical and Biomedical Analysis
Elizabeth A Kelly, Zhixuan Feng, Maribeth L Gidley, Christopher D Sinigalliano, Naresh Kumar, Allison G Donahue, Adrianus J H M Reniers, Helena M Solo-Gabriele
When beach water monitoring programs identify poor water quality, the causes are frequently unknown. We hypothesize that management policies play an important role in the frequency of fecal indicator bacteria (FIB) exceedances (enterococci and fecal coliform) at recreational beaches. To test this hypothesis we implemented an innovative approach utilizing large amounts of monitoring data (n > 150,000 measurements per FIB) to determine associations between the frequency of contaminant exceedances and beach management practices...
February 12, 2018: Journal of Environmental Management
Jill A Jenkins, Michael R Rosen, Rassa O Draugelis-Dale, Kathy R Echols, Leticia Torres, Carla M Wieser, Constance A Kersten, Steven L Goodbred
Lake Mead National Recreational Area (LMNRA) serves as critical habitat for several federally listed species and supplies water for municipal, domestic, and agricultural use in the Southwestern U.S. Contaminant sources and concentrations vary among the sub-basins within LMNRA. To investigate whether exposure to environmental contaminants is associated with alterations in male common carp (Cyprinus carpio) gamete quality and endocrine- and reproductive parameters, data were collected among sub-basins over 7 years (1999-2006)...
February 10, 2018: Environmental Research
Kimberly B Glazer, Melissa N Eliot, Valery A Danilack, Lynn Carlson, Maureen G Phipps, Payam Dadvand, David A Savitz, Gregory A Wellenius
BACKGROUND: Residential green space may improve birth outcomes, with prior studies reporting higher birthweight among infants of women living in greener areas. However, results from studies evaluating associations between green space and preterm birth have been mixed. Further, the potential influence of residential proximity to water, or 'blue space', on health has not previously been evaluated. OBJECTIVES: To evaluate associations between green and blue space and birth outcomes in a coastal area of the northeastern United States...
February 9, 2018: Environmental Research
Christina Estela Brown, Mahadev G Bhat, Jennifer S Rehage, Ali Mirchi, Ross Boucek, Victor Engel, Jerald S Ault, Pallab Mozumder, David Watkins, Michael Sukop
This research develops an integrated methodology to determine the economic value to anglers of recreational fishery ecosystem services in Everglades National Park that could result from different water management scenarios. The study first used bio-hydrological models to link managed freshwater inflows to indicators of fishery productivity and ecosystem health, then link those models to anglers' willingness-to-pay for various attributes of the recreational fishing experience and monthly fishing effort. This approach allowed us to estimate the foregone economic benefits of failing to meet monthly freshwater delivery targets...
January 30, 2018: Science of the Total Environment
Viviane Girardi, Meriane Demoliner, Caroline Rigotto, Vania Elisabete Schneider, Suelen Paesi, Fernando Rosado Spilki
Adenoviruses (AdV) are related to respiratory and gastrointestinal diseases in animals and human beings. Their wide genetic diversity in water bodies and their resistance to environmental conditions allow the use of AdV as a reliable marker for detection of fecal contamination. In this work, the diversity of AdV along Belo Stream - in the city of Caxias do Sul, Rio Grande do Sul, Brazil - was evaluated. Samples were compared in both concentrated and unconcentrated forms. The identification of different AdV species was performed by amplifying a partial sequence of the DNA polymerase gene...
February 2018: Journal of Water and Health
Chirhakarhula Emmanuel Chubaka, Harriet Whiley, John W Edwards, Kirstin E Ross
In Australia, rainwater is an important source of water for many households. Unlike municipal water, rainwater is often consumed untreated. This study investigated the potential contamination of rainwater by microorganisms. Samples from 53 rainwater tanks across the Adelaide region were collected and tested using Colilert™ IDEXX Quanti-Tray*/2000. Twenty-eight out of the 53 tanks (53%) contained Escherichia coli. Samples collected from ten tanks contained E. coli at concentrations exceeding the limit of 150 MPN/100 mL for recreational water quality...
February 8, 2018: Pathogens
C A Acosta, C E López Pasquali, G Paniagua, R M Garcinuño, P Fernández Hernando
Santiago del Estero is a province located in northwestern Argentina. The Dulce River is used for irrigation through a vast network of channels and ditches, including the San Martin Canal (SMC), which crosses the capital city of Santiago del Estero. This canal's water is used for drinking, as well as recreational use for the general population. However, this river has been seriously polluted for several decades. The present study focuses on the identification and the quantification of the water pollution levels of total phenols in the SMC according to the seasonal periods...
February 1, 2018: Environmental Pollution
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