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Testing the efficiency of temperate benthic biotic indices in assessing the ecological status of a tropical ecosystem Texto completo
2016
Sivadas, Sanitha K. | Nagesh, Rahul | Gupta, G.V.M. | Gaonkar, Udaykumar | Mukherjee, Indranil | Ramteke, Darwin | Ingole, Baban S.
The objectives of the present study were to evaluate the ecological status of tropical coastal waters using the temperate benthic indices and examine the effect of seasonal variability on the performance of benthic indices. Macrobenthic samples were collected from northwest to southeast coast of India during 2003–2012 and we tested different univariate indices, ecological strategies, indicator species and multimetric indices. AMBI and multimetric indices performed satisfactorily in evaluating the ecological status. Seasonal variability on the biotic indices was observed during the southwest monsoon and fall intermonsoon period due to recruitment. Therefore, we recommended the non-monsoon period (January–May) as a suitable time of the year to use the indices for effective assessment of the Indian coastal waters. Results show that, the temperate benthic indices are efficient in assessing the tropical environmental status. However, complementary use of different indices is suggested for accurate assessment of the environmental status.
Mostrar más [+] Menos [-]Effects of short-term hypoxia and seawater acidification on hemocyte responses of the mussel Mytilus coruscus Texto completo
2016
Sui, Yanming | Kong, Hui | Shang, Yueyong | Huang, Xizhi | Wu, FangLi | Hu, Menghong | Lin, Daohui | Lu, Weiqun | Wang, Youji
Effects of short-term hypoxia and seawater acidification on hemocyte responses of the mussel Mytilus coruscus Texto completo
2016
Sui, Yanming | Kong, Hui | Shang, Yueyong | Huang, Xizhi | Wu, FangLi | Hu, Menghong | Lin, Daohui | Lu, Weiqun | Wang, Youji
Hypoxia often intensifies with rising dissolved CO2, but the concurrent effects of hypoxia and acidification on bivalves are largely unknown. In this study, immune responses of hemocytes in the mussel Mytilus coruscus were examined under six combinations of pH (7.3, 7.7 and 8.1) and dissolved oxygen (DO) concentrations (2mgL−1, 6mgL−1) for 72h. Generally, total hemocyte account, phagocytosis, esterase and lysosomal content were reduced under low DO and pH conditions, whereas hemocyte mortality and reactive oxygen species production increased under low DO and pH. Both hypoxia and low pH have negative effects on mussels, but the effects of pH are not as strong as DO. Moreover, significant interactions between DO and pH occurred. However, acidification generally doesn't aggravate the effects induced by hypoxia. Acidification and hypoxia may increase disease risk and impact the aquaculture of this species.
Mostrar más [+] Menos [-]Effects of short-term hypoxia and seawater acidification on hemocyte responses of the mussel Mytilus coruscus Texto completo
2016
Sui, Yanming | Kong, Hui | Shang, Yueyong | Huang, Xizhi | Wu, Fangli | Hu, Menghong | Lin, Daohui | Lu, Weiqun | Wang, Youji
Hypoxia often intensifies with rising dissolved CO2, but the concurrent effects of hypoxia and acidification on bivalves are largely unknown. In this study, immune responses of hemocytes in the mussel Mytilus coruscus were examined under six combinations of pH (7.3, 7.7 and 8.1) and dissolved oxygen (DO) concentrations (2 mg/ L, 6 mg/L) for 72 h. Generally, total hemocyte account, phagocytosis, esterase and lysosomal content were reduced under low DO and pH conditions, whereas hemocyte mortality and reactive oxygen species production increased under low DO and pH. Both hypoxia and low pH have negative effects on mussels, but the effects of pH are not as strong as DO. Moreover, significant interactions between DO and pH occurred. However, acidification generally doesn't aggravate the effects induced by hypoxia. Acidification and hypoxia may increase disease risk and impact the aquaculture of this species.
Mostrar más [+] Menos [-]Metagenomic analysis between free-living and cultured Epinephelus fuscoguttatus under different environmental conditions in Indonesian waters Texto completo
2016
Hennersdorf, Philipp | Mrotzek, Grit | Abdul-Aziz, Muslihudeen A. | Saluz, Hans Peter
Metagenomic analysis between free-living and cultured Epinephelus fuscoguttatus under different environmental conditions in Indonesian waters Texto completo
2016
Hennersdorf, Philipp | Mrotzek, Grit | Abdul-Aziz, Muslihudeen A. | Saluz, Hans Peter
In this study, we analyzed and compared feces of free-living and cultivated fish species, Epinephelus fuscoguttatus under different environmental conditions in Indonesian waters. Metagenome analysis was performed using Illumina MiSeq sequencing of the whole metagenomic DNA isolated from fish feces samples. The analysis covered both prokaryotic and eukaryotic DNA. Feces samples from mariculture fish revealed a highly stable distribution of several orders of bacteria when compared to samples from free-living fish, which were highly diverse and dominated by Vibrionales, Pseudomonales, Rhizobiales and non-classifiable Alphaproteobacteria. The eukaryotic content of the samples was dominated by residues of the host and nine additional fish species that formed a portion of the diet. Investigations on functional annotations for predominant bacterial taxa, using Gene Ontology enrichment, revealed a number of functions related to DNA metabolic processes, especially DNA repair, as well as antibiotic response in the free-living fish species.
Mostrar más [+] Menos [-]Metagenomic analysis between free-living and cultured Epinephelus fuscoguttatus under different environmental conditions in Indonesian waters Texto completo
2016
Philipp Hennersdorf, | Grit Mrotzek, | Abdul-Aziz, M. | Hanspeter Saluz,
Abstract not available | Philipp Hennersdorf, Grit Mrotzek, Muslihudeen A. Abdul-Aziz, Hans Peter Saluz
Mostrar más [+] Menos [-]Is existing legislation fit-for-purpose to achieve Good Environmental Status in European seas? Texto completo
2016
Boyes, Suzanne J. | Elliott, Michael | Murillas-Maza, Arantza | Papadopoulou, Nadia | Uyarra, Maria C.
Recent additions to marine environmental legislation are usually designed to fill gaps in protection and management, build on existing practices or correct deficiencies in previous instruments. Article 13 of the European Marine Strategy Framework Directive (MSFD) requires Member States to develop a Programme of Measures (PoM) by 2015, to meet the objective of Good Environmental Status (GES) for their waters by 2020. This review explores key maritime-related policies with the aim to identify the opportunities and threats that they pose for the achievement of GES. It specifically examines how Member States have relied on and will integrate existing legislation and policies to implement their PoM and the potential opportunities and difficulties associated with this. Using case studies of three Member States, other external impediments to achieving GES are discussed including uses and users of the marine environment who are not governed by the MSFD, and gives recommendations for overcoming barriers.
Mostrar más [+] Menos [-]Plastic ingestion by Atlantic cod (Gadus morhua) from the Norwegian coast Texto completo
2016
Bråte, Inger Lise N. | Eidsvoll, David P. | Steindal, Calin Constantin | Thomas, Kevin V.
Plastic ingestion by Atlantic cod (Gadus morhua) from the Norwegian coast Texto completo
2016
Bråte, Inger Lise N. | Eidsvoll, David P. | Steindal, Calin Constantin | Thomas, Kevin V.
This study documents the occurrence of microplastic (<5mm), mesoplastics (5–20mm) and macroplastic (>20mm) in Atlantic cod (Gadus morhua), a common and economically important species of marine fish in Norway. Fish stomachs (n=302) were examined from six different locations along the coast of Norway. Three percent of the individual stomachs contained items identified by Fourier transform infrared spectroscopy (FTIR) as synthetic polymers. Bergen City Harbour was a hotspot with 27% of the cod examined found to contain plastic. Polyester was the most frequently detected polymer. All bar one of the stomachs that contained plastic were full of organic stomach content, suggesting a plastic gut clearance rate similar to the ingested food. It is proposed that stomach fullness is an important metric in order to avoid underestimations when assessing the levels of microplastic ingested by fish.
Mostrar más [+] Menos [-]Plastic ingestion by Atlantic cod (Gadus morhua) from the Norwegian coast | Plastic ingestion by Atlantic cod (Gadus morhua) from the Norwegian coast Texto completo
2016
Bråte, Inger Lise N. | Eidsvoll, David P. | Steindal, Calin Constantin | Thomas, Kevin V
This study documents the occurrence of microplastic (< 5 mm), mesoplastics (5–20 mm) and macroplastic (> 20 mm) in Atlantic cod (Gadus morhua), a common and economically important species of marine fish in Norway. Fish stomachs (n = 302) were examined from six different locations along the coast of Norway. Three percent of the individual stomachs contained items identified by Fourier transform infrared spectroscopy (FTIR) as synthetic polymers. Bergen City Harbour was a hotspot with 27% of the cod examined found to contain plastic. Polyester was the most frequently detected polymer. All bar one of the stomachs that contained plastic were full of organic stomach content, suggesting a plastic gut clearance rate similar to the ingested food. It is proposed that stomach fullness is an important metric in order to avoid underestimations when assessing the levels of microplastic ingested by fish. | acceptedVersion
Mostrar más [+] Menos [-]Role of environmental particulate matters on corrosion of copper Texto completo
2016
Saha, D. | Pandya, A. | Singh, J.K. | Paswan, S. | Singh, D.D.N.
Effect of environmental particulate materials on kinetics and mechanism of corrosion of industrial grade copper exposed in different parts of India is investigated. It is observed that the level of particulate materials in the atmosphere has more dominant role than the acidic gases on initiation of corrosion, formation of protective patina on the surface of the exposed samples leading to mitigation of corrosion. The identification of corrosion products formed on the surface of exposed samples by Raman spectroscopy provides very vital information to explain the observed corrosion rate of the metal computed in different environments. Electrochemical anodic polarization of the exposed samples supports the mechanism proposed for accelerating and protective effect on corrosion of the metals exposed in different environments.
Mostrar más [+] Menos [-]Ballast water sediment elemental analysis Texto completo
2016
Maglić, Lovro | Zec, Damir | Frančić, Vlado
Sediment samples from the ballast water tanks of ships calling at the port of Rijeka in the Northern Adriatic were analysed using X-ray photoelectron spectroscopy (XPS) and secondary ion mass spectroscopy (SIMS) using caesium, argon and oxygen ion beams. The research was carried out in order to determine the sediment composition and relative abundance of the dominant elements. The results indicate that the sediment samples mostly consisted of compounds that originated from the deterioration of tank plates, tank coating residues and ballast operations such as clay, silt, sand and organic materials. No significant heavy metals or highly toxic elements were found. The research revealed some advantages and significant drawbacks of using XPS and SIMS for the routine analysis of sediment composition as a decision supporting tool for ballast water and sediment management.
Mostrar más [+] Menos [-]Organotins in fish muscle and liver from the Polish coast of the Baltic Sea: Is the total ban successful? Texto completo
2016
Filipkowska, Anna | Złoch, Ilona | Wawrzyniak-Wydrowska, Brygida | Kowalewska, Grażyna
Muscle and liver tissues of nine fish species were analyzed to assess butyltin and phenyltin contamination. The samples were collected from three basins located in the Southern Baltic Sea coastal zone that each represent different potential for organotin pollution. Maximum total concentrations of butyltin compounds (BTs) in the fish muscles and livers were 715 and 1132ng Sn g−1 d.w., respectively, whereas triphenyltin (TPhT) was not detected. In the muscle samples, the predominant compound in the sum of butyltins was tributyltin (TBT), while in the liver samples, tributyltin degradation products were found in the majority. The results demonstrate that 6–7years after the implementation of the total ban on harmful organotin use in antifouling paints, butyltins remain present in fishes from the Polish coast of the Baltic Sea. According to the HELCOM recommendation, eight samples exceeded the good environmental status boundary for tributyltin in seafood.
Mostrar más [+] Menos [-]Regional differences in plastic ingestion among Southern Ocean fur seals and albatrosses Texto completo
2016
Ryan, Peter G. | de Bruyn, P.J Nico | Bester, Marthán N.
Regional differences in plastic ingestion among Southern Ocean fur seals and albatrosses Texto completo
2016
Ryan, Peter G. | de Bruyn, P.J Nico | Bester, Marthán N.
We provide data on regional differences in plastic ingestion for two Southern Ocean top predators: Arctocephalus fur seals and albatrosses (Diomedeidae). Fur seals breeding on Macquarie Island in the 1990s excreted small (mainly 2–5mm) plastic fragments, probably derived secondarily from myctophid fish. No plastic was found in the scats of these seals breeding on three islands in the southwest Indian and central South Atlantic Oceans, despite myctophids dominating their diets at these locations. Compared to recent reports of plastic ingestion by albatrosses off the east coast of South America, we confirm that plastic is seldom found in the stomachs of Thalassarche albatrosses off South Africa, but found no Diomedea albatrosses to contain plastic, compared to 26% off South America. The reasons for such regional differences are unclear, but emphasize the importance of reporting negative as well as positive records of plastic ingestion by marine biota.
Mostrar más [+] Menos [-]Indoor air quality investigation of the school environment and estimated health risks: Two-season measurements in primary schools in Kozani, Greece Texto completo
2016
Kalimeri, Krystallia K. | Saraga, Dikaia E. | Lazaridis, Vasileios D. | Legkas, Nikolaos A. | Missia, Dafni A. | Tolis, Evangelos I. | Bartzis, John G.
Two primary schools and one kindergarten were selected in the city of Kozani, Greece in order to investigate the school environment, the indoor air pollutants that children are exposed to and possible health risks at school. In each school three classrooms and one outdoor position were monitored from Monday to Friday, in both non-heating (26/09/2011–14/10/2011) and heating (23/01/2012–10/02/2012) period. Temperature, relative humidity and CO2, were continuously monitored. Formaldehyde, benzene, trichloroethylene, pinene, limonene, NO2 and O3 were measured with diffusive samplers. CO was monitored every day (30 min/day). Radon was measured for four weeks with short term radon detectors. PM2.5 was gravimetrically determined while PM2.5 and PM10 fractions were measured using the optical light scattering technique. Building material emission testing for VOCs was performed using the Field and Laboratory Emission Cell (FLEC). The ventilation rate for each classroom was calculated based on the CO2 measurements.Results indicated that indoor air concentrations of the measured pollutants were within accepted limits with indicative ranges 1.5–9.4 μg/m3 for benzene, 2.3–28.5 μg/m3 for formaldehyde, 4.6–43 μg/m3 for NO2 and 0.1–15.6 μg/m3 for O3. Emissions from building materials seem to have a significant contribution to the indoor air quality. Very low ventilation rates (0.1–3.7 L/s per person) were observed, indicating inadequate ventilation and possible indoor air quality problems requiring intervention measures. The estimated average lifetime cancer risks for benzene, formaldehyde and trichloroethylene were very low.
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