Read by QxMD icon Read

Marine Pollution Bulletin

Julie M van der Hoop, Peter Corkeron, Allison G Henry, Amy R Knowlton, Michael J Moore
Large whales are frequently entangled in fishing gear and sometimes swim while carrying gear for days to years. Entangled whales are subject to additional drag forces requiring increased thrust power and energy expenditure over time. To classify entanglement cases and aid potential disentanglement efforts, it is useful to know how long an entangled whale might survive, given the unique configurations of the gear they are towing. This study establishes an approach to predict drag forces on fishing gear that entangles whales, and applies this method to ten North Atlantic right whale cases to estimate the resulting increase in energy expenditure and the critical entanglement duration that could lead to death...
December 3, 2016: Marine Pollution Bulletin
S M Jung, J S Bae, S G Kang, J S Son, J H Jeon, H J Lee, J Y Jeon, M Sidharthan, S H Ryu, H W Shin
The toxicity of the antifouling biocides Irgarol 1051, Diuron, Chlorothalonil, Dichlofluanid, Sea-nine 211, Copper pyrithione, Zinc pyrithione, Ziram and Zineb were evaluated on Nitzschia pungens and Artemia larvae. Results showed that EC50 for Irgarol 1051 was 0.586μgl(-1) was the strongest effect on N. pungens following by Copper pyrithione (4.908μgl(-1)), Ziram (5.421μgl(-1)), Zinc pyrithione (5.513μgl(-1)), Diuron (6.640μgl(-1)), Zineb (232.249μgl(-1)), Sea-nine 211(267.368μgl(-1)), Chlorothalonil (360...
December 2, 2016: Marine Pollution Bulletin
Bin Chen, Jian Liu, Jiandong Qiu, Xilin Zhang, Shuang Wang, Jinqing Liu
Twenty-five surface sediments and one sediment core sample were collected from the study area. Grain size, major elements, and heavy metals were determined. The content of fine-grained sediments (silt and clay), as well as the concentrations of major elements and heavy metals, showed seaward decreasing trends, with high content in the coastal areas of the East China Sea (ECS) and south west of Jeju Island. Low enrichment factor (EF) and geoaccumulation index (Igeo) values were found, indicating that the ecological risk of heavy metals was low...
December 1, 2016: Marine Pollution Bulletin
S Nethaji, R Kalaivanan, Arya Viswam, M Jayaprakash
Surface sediments were collected from Vellar and Coleroon estuaries for determine sediment texture, calcium carbonate, organic matter and heavy metals. Pollution indices such as pollution load index (PLI), contamination factor (CF), enrichment factor (EF) and geo-accumulation index (Igeo) were done for this study to know the level of heavy metals pollution in the estuarine ecosystem. Pearson correlation matrix and factor were used to assess the relationship and source of heavy metals in the estuarine sediments...
December 1, 2016: Marine Pollution Bulletin
Benjamin O Botwe, Peter Kelderman, Elvis Nyarko, Piet N L Lens
This study assessed DDTs, HCHs and PAHs contamination in sediments from the Tema Harbour (Ghana) and the associated ecotoxicological risks. The results showed widespread DDTs, HCHs and PAHs contamination in the harbour sediments with mean concentrations ranging from 6.0-12.8, 2.8-12.7 and 2750-5130μg·kg(-1)d·w, respectively. The silt-clay and total organic carbon contents of the sediments poorly correlated with the pollutant concentrations. DDTs and HCHs contamination relate to past use of DDT and lindane, which under the anoxic harbour conditions resulted in disproportionately higher concentrations of p,p'-DDD and γ-HCH in the sediments...
December 1, 2016: Marine Pollution Bulletin
Susanne Kühn, Bernike van Werven, Albert van Oyen, André Meijboom, Elisa L Bravo Rebolledo, Jan A van Franeker
In studies of plastic ingestion by marine wildlife, visual separation of plastic particles from gastrointestinal tracts or their dietary content can be challenging. Earlier studies have used solutions to dissolve organic materials leaving synthetic particles unaffected. However, insufficient tests have been conducted to ensure that different categories of consumer products partly degraded in the environment and/or in gastrointestinal tracts were not affected. In this study 63 synthetic materials and 11 other dietary items and non-plastic marine debris were tested...
November 29, 2016: Marine Pollution Bulletin
Tajudeen A Oyehan, Assad A Al-Thukair
Contaminated sediment samples were collected from the Eastern Province, Saudi Arabia for isolation of pyrene- and phenanthrene-degrading bacteria by enrichment method. Four isolates were morphologically characterized as Gram-negative rod strains and 16S rRNA sequence analysis revealed the isolates as closely related to Pseudomonas aeruginosa, P. citronellolis, Ochrobactrum intermedium and Cupriavidus taiwanensis. Degradation of the polycyclic aromatic hydrocarbons (PAHs) by the latter three strains was investigated in liquid cultures...
November 29, 2016: Marine Pollution Bulletin
Antônia Santos, Rachel Ann Hauser-Davis, Manoel José Soares Santos, Salvatore Giovani De Simone
Numerous countries have been confronted with infectious diseases in mariculture activities, including fungi infections, although reports in scallops are scarce. Thus, this study aimed to investigate the occurrence of filamentous fungi in Nodipecten nodosus specimens from three marine farms in Southeastern Brazil. Eight fungi genera were observed in the branchial arches, intestine and muscle tissue of the scallop specimens. These include potentially toxin-producing species, such as Aspergillus, Penicillium and Fusarium...
November 29, 2016: Marine Pollution Bulletin
Marco R Hernandez, Mattias L Johansson, Yanyu Xiao, Mark A Lewis, Hugh J MacIsaac
Ballast water has been a major source of non-indigenous species introductions. The International Maritime Organization has proposed performance standard that will establish an upper limit for viable organisms in discharged ballast. Here we test different sampling efforts for zooplankton in ballast water on a commercial vessel. We fit different probability density functions to find the most representative and evaluated sampling efforts necessary to achieve error rates (α, β) of <0.05. Our tests encompassed four seasonal trials and five sample volumes...
November 29, 2016: Marine Pollution Bulletin
Xiaohui Yang, Pengbao Wu, Aijing Yin, Huan Zhang, Ming Zhang, Chao Gao
Concentrations of heavy metals in coastal soils, stream sediments and intertidal sediments of Yueqing Bay basin were analyzed to study their distribution and trace the possible sources. According to various single- and multi-index methods, heavy metal enrichment, especially for Cu, Zn, Cr and Ni in stream sediments, should draw environmental concern. Controlling factors such as inorganic scavengers, organic matter, sample grain size and hydrodynamic conditions were identified to influence the transportation and distribution of metals within coastal soils and sediments...
November 29, 2016: Marine Pollution Bulletin
Yoshihiro B Akiyama, Erina Iseri, Tomoya Kataoka, Makiko Tanaka, Kiyonori Katsukoshi, Hirotada Moki, Ryoji Naito, Ramrav Hem, Tomonari Okada
In the present study, we determined the common morphological characteristics of the feces of Mytilus galloprovincialis to develop a method for visually discriminating the feces of this mussel in deposited materials. This method can be used to assess the effect of mussel feces on benthic environments. The accuracy of visual morphology-based discrimination of mussel feces in deposited materials was confirmed by DNA analysis. Eighty-nine percent of mussel feces shared five common morphological characteristics...
November 28, 2016: Marine Pollution Bulletin
Kieran M Tierney, Graham K P Muir, Gordon T Cook, Gillian MacKinnon, John A Howe, Johanna J Heymans, David J Hughes, Sheng Xu
Ecosystem uptake and transfer of Sellafield-derived radiocarbon ((14)C) were examined within the West of Scotland marine environment. The dissolved inorganic carbon component of seawater, enriched in (14)C, is transported to the West of Scotland where it is transferred through the marine food web. Benthic and pelagic biota with variable life-spans living in the North Channel and Clyde Sea show comparable (14)C activities. This suggests that mixing of (14)C within the Irish Sea results in a relatively constant northwards dispersal of activity...
November 26, 2016: Marine Pollution Bulletin
Huizhen Li, Fei Wang, Jing You
: Bioaccumulation potential and associated ecological risk of sediment-bound DDT and its metabolites (DDXs) and heavy metals in Hailing Bay, a typical mariculture zone along the southern coast of China, were evaluated. The estuarine sediments were co-polluted by DDXs (120-4882ng/g dry wt.) and heavy metals (292-409mg/kg dry wt.). Both DDXs and metals in sediment were bioavailable to Nereis succinea, although the biota-sediment accumulation factors were less than 1 except for DDE. Significant transformation of DDT in organism was observed and DDE was the main metabolite...
November 26, 2016: Marine Pollution Bulletin
Meredith Evans, Jiqing Liu, Hernando Bacosa, Brad E Rosenheim, Zhanfei Liu
An important aspect of oil spill science is understanding how the compounds within spilled oil, especially toxic components, change with weathering. In this study we follow the evolution of petroleum hydrocarbons, including n-alkanes, polycyclic aromatic hydrocarbons (PAHs) and alkylated PAHs, on a Louisiana beach and salt marsh for three years following the Deepwater Horizon spill. Relative to source oil, we report overall depletion of low molecular weight n-alkanes and PAHs in all locations with time. The magnitude of depletion, however, depends on the sampling location, whereby sites with highest wave energy have highest compound depletion...
November 26, 2016: Marine Pollution Bulletin
Felipe Tucca, Heriberto Moya, Karla Pozo, Francesca Borghini, Silvano Focardi, Ricardo Barra
Growth of the aquaculture industry has triggered the need for research into the potential environmental impact of chemicals used by salmon farms to control diseases. In this study, the antiparasitic pesticides emamectin benzoate (EB), diflubenzuron (DI), teflubenzuron (TE), and cypermethrin (CP) were measured in sediments near salmon cages in southern Chile. Concentrations for EB were between 2.2 and 14.6ngg(-1), while the benzoylphenyl ureas DI and TE were detected in the ranges of 0.1 to 1.2ngg(-1) and 0...
November 25, 2016: Marine Pollution Bulletin
Mark Fonseca, Gregory A Piniak, Natalie Cosentino-Manning
Existing literature illustrates inconsistent responses of seagrasses to oil exposure, both in the field and in the laboratory. Here, we add a new study that combined morphometric, demographic and photophysiology assessments to determine the potential oiling impacts to eelgrass (Zostera marina) from the 2007 Cosco Busan event in San Francisco Bay. Shoot densities, reproductive status, and rhizome elongation of Z. marina were examined at sites with pre-spill data, and eelgrass photosynthetic efficiency was measured post-spill...
November 25, 2016: Marine Pollution Bulletin
Abolfazl Naji, Zinat Esmaili, Farhan R Khan
Currently little is known about the prevalence of plastics and microplastics (MPs) in the Persian Gulf. Five sampling stations were selected along the Strait of Hormuz (Iran) that exhibited different levels of industrialization and urbanization, and included a marine protected area. Debris was observed and sediments were collected for MPs extraction via fluidization/floatation methodology. The order of MP abundance (par/kg) generally reflected the level of anthropogenic activity: Bostanu (1258±291)>Gorsozan (122±23)>Khor-e-Yekshabeh (26±6)>Suru (14±4)>Khor-e-Azini (2±1)...
November 25, 2016: Marine Pollution Bulletin
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...
November 24, 2016: Marine Pollution Bulletin
Morgan S Pratchett, Andrew H Baird, Andrew G Bauman, John A Burt
Marked shifts in the composition of coral assemblages are occurring at many locations, but it is unknown whether these are permanent shifts reinforced by patterns of population replenishment. This study examined the composition of juvenile coral assemblages across the United Arab Emirates (UAE). Densities of juvenile corals varied significantly among locations, but were highest where coral cover was highest. Juvenile coral assemblages within the Persian Gulf were dominated by Porites, while no Acropora were recorded...
November 23, 2016: Marine Pollution Bulletin
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"