Jintao Wang, and Wei Yu, and Xinjun Chen, and Yong Chen

The western winter-spring cohort of neon flying squid, Ommastrephes bartramii, is targeted by Chinese squidjigging fisheries in the northwest Pacific from August to November. Because this squid has a short lifespan and is an ecological opportunist, the dynamics of its stock is greatly influenced by the environmental conditions, which need to be considered in its assessment and management. In this study, an environmentally dependent surplus production (EDSP) model was developed to evaluate the st...

Guillermo Samperio-Ramos, and J. Magdalena Santana-Casiano, and Melchor González-Dávila, and Sonia Ferreira, and Manuel A. Coimbra

The variability in the extracellular release of organic ligands by <em>Emiliania huxleyi</em> under four different pCO₂ scenarios (225, 350, 600 and 900 μatm), was determined. Growth in the batch cultures was promoted by enriching them only with major nutrients and low iron concentrations. No chelating agents were added to control metal speciation. During the initial (IP), exponential (EP) and steady (SP) phases, extracellular release rates, normalized per cell and day, of dissolved o...

Damaris B. Neri, and Carla B. Kotzian, and Ana Emília Siegloch

Neste estudo, foi analisada a composição dos Heteroptera do curso médio da bacia do rio Jacuí, RS, Brasil, previamente à construção da U.H.E. Dona Francisca, bem como alguns fatores abióticos que poderiam afetar a distribuição e a abundância destes organismos. Nos ambientes lênticos, amostragens quantitativas foram realizadas utilizando-se peneiras, em seis localidades (janeiro 2000). Nos ambientes lóticos, as coletas foram feitas através de amostrador de Surber (de maio a outubro de 2000), priv...

Diego F. Lozano-Cortés, and Alan Giraldo, and Vanessa Izquierdo

One of the major stresses on corals is the settlement of suspended sediment on their surfaces. This leads to the blocking of light, the covering of the coral mucus surface and an increased risk of disease. For this reason sediment deposition on a reef is considered a highly important variable in coral reef studies. With the use of sediment traps and oceanographic sensors, the sediment deposition rate and water conditions during a rainy season (April-May 2009) on a Tropical Eastern Pacific coral ...

J. Xu, and P. J. Harrison, and W.-J. Cai, and A. Y. Ho, and K. Yin, and X.-C. Yuan

Data from seven cruises in three different environments including the Pearl River estuary, sewage discharge outfall, and eastern coastal/shelf waters were used to examine the seasonal variations in net community production (NCP) and the biologically active gases O₂ and CO₂. In the winter dry season, when monsoon-induced downwelling was dominant, NCP was negative (−84 ± 50 mmol C m⁻² d⁻¹) in all three regions. The negative NCP corresponded to O<sub>2</s...

Elizabeth Aidar, and Teresa C. S. Sigaud-Kutner, and Márcia C. Bicega, and Katya P. Schinke, and Sania M. F. Gianesella, and Elisabete S. Braga

The liquid effluent from an oil maritime terminal, with produced water as the main component, had its toxicity evaluated through toxicity tests with the diatom Skeletonema costatum. Two previously treated effluent samples (effluents A and B), were provided by PETROBRAS for the experiments. Both samples presented high salinity (67‰ for effluent A and 62‰ for effluent B) and low pH values (6.2), whereas total sulphide, phenol and nutrient content, dissolved/dispersed petroleum hydrocarbon concentr...

Biswadeep Das, and Rupenangshu K. Hazra

R. Kwok, and S. Kacimi

<p>We examine the variability of sea ice freeboard, snow depth, and ice thickness in three years (2011, 2014, and 2016) of repeat surveys of an IceBridge (OIB) transect across the Weddell Sea. Averaged over this transect, ice thickness ranges from 2.40±1.07 (2011) to 2.60±1.15&thinsp;m (2014) and snow depth from 35.8±11.5 (2016) to 43.6±10.2&thinsp;cm (2014), suggesting a highly variable but broadly thicker ice cover compared to that inferred from drilling and ship-based measurements. Spa...

Mironowa K. Ju.

The article is dedicated to the life and work of the Russian Neo-Kantianist Gavriil Gordon. The author addresses archive material and the memoires of Gavriil Gordon's children, which allow reconstructing certain episodes of his creative work.

Rigatos Gerasimos, and Busawon Krishna, and Serpanos Dimitrios, and Siadimas Vasilios, and Siano Pierluigi, and Abbaszadeh Masoud

A nonlinear optimal (H-infinity) control method is proposed for an electric ship's propulsion system that consists of an induction motor, a drivetrain and a propeller. The control method relies on approximate linearization of the propulsion system's dynamic model using Taylor-series expansion and on the computation of the state-space description's Jacobian matrices. The linearization takes place around a temporary equilibrium which is recomputed at each time-step of the control method. For the a...

C. Bozzetti, and Y. Sosedova, and M. Xiao, and K. R. Daellenbach, and V. Ulevicius, and V. Dudoitis, and G. Mordas, and S. Byčenkienė, and K. Plauškaitė, and A. Vlachou, and B. Golly, and B. Chazeau, and J.-L. Besombes, and U. Baltensperger, and J.-L. Jaffrezo, and J. G. Slowik, and I. El Haddad, and A. S. H. Prévôt

The widespread use of Aerodyne aerosol mass spectrometers (AMS) has greatly improved real-time organic aerosol (OA) monitoring, providing mass spectra that contain sufficient information for source apportionment. However, AMS field deployments remain expensive and demanding, limiting the acquisition of long-term datasets at many sampling sites. The offline application of aerosol mass spectrometry entailing the analysis of nebulized water extracted filter samples (offline-AMS) increases the spati...

Ranjan eRamasamy, and Sinnathamby Noble Surendran

Global climate change can potentially increase the transmission of mosquito vector-borne diseases such as malaria, lymphatic filariasis and dengue in many parts of the world. These predictions are based on the effects of changing temperature, rainfall and humidity on mosquito breeding and survival, the more rapid development of ingested pathogens in mosquitoes and the more frequent blood feeds at moderately higher ambient temperatures. An expansion of saline and brackish water bodies (water with...

A. Sluijs, and L. van Roij, and G. J. Harrington, and S. Schouten, and J. A. Sessa, and L. J. LeVay, and G.-J. Reichart, and C. P. Slomp

The Paleocene–Eocene Thermal Maximum (PETM, ~ 56 Ma) was a ~ 200 kyr episode of global warming, associated with massive injections of ¹³C-depleted carbon into the ocean–atmosphere system. Although climate change during the PETM is relatively well constrained, effects on marine oxygen concentrations and nutrient cycling remain largely unclear. We identify the PETM in a sediment core from the US margin of the Gulf of Mexico. Biomarker-based paleotemperature proxies (methylation of branc...

Md. Shahidul Haque, and Md. Asraful Haque, and Swapan Kumar Roy, and M.M.H. Khan, and Md. Mosharrof Hossain

Channa punctata varieties of fish are energetic and survive in critical environment although the molecular mechanism is not known. They were exposed to cold (4–8 °C) for 30 min, 1 h, 2 h and 4 h and the total protein contents in the liver were not significantly changed up to 4 h of cold exposure while a significantly increased protein level in the skeletal muscle was noted and maximal at 2 h. Groups of fish were exposed to Na2HAsO4 to examine its role on cold-induced protein synthesis in the ske...

Thanaporn Amnuaikit

Li Wang, and Xiaoyi Wang, and Xuebo Jin, and Jiping Xu, and Huiyan Zhang, and Jiabin Yu, and Qian Sun, and Chong Gao, and Lingbin Wang

The formation process of algae is described inaccurately and water blooms are predicted with a low precision by current methods. In this paper, chemical mechanism of algae growth is analyzed, and a correlation analysis of chlorophyll-a and algal density is conducted by chemical measurement. Taking into account the influence of multi-factors on algae growth and water blooms, the comprehensive prediction method combined with multivariate time series and intelligent model is put forward in this pap...

Farshid Kafilzadeh, and Faranak Dehdari

In this study amylase producing actinomycetes were isolated from the sediments of mangrove forests in the south of Iran and the rate of amylase activity was measured. The samples of sediments were collected from one hundred different places in mangrove forests of the south of Iran. Collected samples were diluted then they were purified on the starch (casein agar) culture and Woodruff. After that they were examined in terms of amylase production on agar–starch culture. The activity of the produce...

Marek Świrgoń, and Malgorzata Stramska

Ocean color satellite missions have provided more than 16-years of consistent, synoptic observations of global ocean ecosystems. Surface chlorophyll concentrations (Chl) derived from satellites have been traditionally used as a metric for phytoplankton biomass. In recent years interpretation of ocean-color satellite data has progressed beyond the estimation of Chl. One of the newer ocean color products is particulate organic carbon (POC) concentration. In this paper we carry out comparisons of s...

S. JOHER, and E. BALLESTEROS, and C. RODRÍGUEZ-PRIETO

This is a qualitative comparison of the distribution of macroalgal-dominated coastal detritic communities from the Western Mediterranean and the Northeastern Atlantic, based on our own data from the Balearic Islands (Western Mediterranean) and available data from literature. The macroalgal-dominated coastal detritic bottoms from both regions could be distinguished by the presence of a high number of regional exclusive non-carbonated species, and the presence of a high number of maërl-forming spe...

W. J. McKiver, and G. Sannino, and F. Braga, and D. Bellafiore

In this work we consider a numerical study of hydrodynamics in the coastal zone using two different models, SHYFEM (shallow water hydrodynamic finite element model) and MITgcm (Massachusetts Institute of Technology general circulation model), to assess their capability to capture the main processes. We focus on the north Adriatic Sea during a strong dense water event that occurred at the beginning of 2012. This serves as an interesting test case to examine both the models strengths and weaknesse...

A. Tsekeri, and A. Lopatin, and V. Amiridis, and E. Marinou, and E. Marinou, and J. Igloffstein, and N. Siomos, and S. Solomos, and P. Kokkalis, and P. Kokkalis, and R. Engelmann, and H. Baars, and M. Gratsea, and P. I. Raptis, and P. I. Raptis, and I. Binietoglou, and N. Mihalopoulos, and N. Mihalopoulos, and N. Kalivitis, and N. Kalivitis, and G. Kouvarakis, and N. Bartsotas, and G. Kallos, and S. Basart, and D. Schuettemeyer, and U. Wandinger, and A. Ansmann, and A. P. Chaikovsky, and O. Dubovik

The Generalized Aerosol Retrieval from Radiometer and Lidar Combined data algorithm (GARRLiC) and the LIdar-Radiometer Inversion Code (LIRIC) provide the opportunity to study the aerosol vertical distribution by combining ground-based lidar and sun-photometric measurements. Here, we utilize the capabilities of both algorithms for the characterization of Saharan dust and marine particles, along with their mixtures, in the south-eastern Mediterranean during the CHARacterization of Aerosol m...

Samuel Appelbaum, and Antonysiluvai Jesuarockiaraj

Following previous observations, this study was undertaken to determine the level of salt required in the diet of gilthead sea bream (Sparus aurata L.) juveniles in order to enhance growth performances and survival when rearing in inland brackish water with a salinity of 2.9‰ TDS (Total Dissolved Salts). The juveniles were reared for 10 weeks in twelve rearing tanks, each stocked with 65 fish. Four different test diets were prepared: a control diet without added salt, and three diets with 12%, 1...

Martha eGledhill, and Kristen N Buck

Iron (Fe) is an essential micronutrient for marine organisms, and it is now well established that low Fe availability controls phytoplankton productivity, community structure and ecosystem functioning in vast regions of the global ocean. The biogeochemical cycle of Fe involves complex interactions between lithogenic inputs (atmospheric, continental or hydrothermal), dissolution, precipitation, scavenging, biological uptake, remineralisation and sedimentation processes. Each of these aspects of F...

Orestis Schinas, and Arnd Graf von Westarp

The plans for the Maritime Silk Road affect the existing liner services. The purpose of this paper is to quantify using the terms of network theory the impact of these plans and to project the effects on the fleet, utilization, port throughput, and carbon footprint. The analysis is based on publicly available information and reasonable fleet deployment assumptions. It also considers current and alternative routing schedules from Shanghai to Europe. The impact of existing and expected emission co...

Ehsan Esmailian, and Hassan Ghassemi, and Hassan Zakerdoost

The proposed design methodology represents a new approach to optimize the propeller–hull system simultaneously. In this paper, two objective functions are considered, the first objective function is Lifetime Fuel Consumption (LFC) and the other one is cost function including thrust, torque, open water and skew efficiencies. The variables of the propeller geometries (Z, EAR, P/D and D) and ship hull parameters (L/B, B/T, T and CB) are considered to be optimized with cavitation, blades stress of p...

C. André, and D. Monfort, and M. Bouzit, and C. Vinchon

There are a number of methodological issues involved in assessing damage caused by natural hazards. The first is the lack of data, due to the rarity of events and the widely different circumstances in which they occur. Thus, historical data, albeit scarce, should not be neglected when seeking to build ex-ante risk management models. This article analyses the input of insurance data for two recent severe coastal storm events, to examine what causal relationships may exist between hazard character...

Keevallik, Sirje, and Männik, Aarne, and Hinnov, Juhan

The possibilities of using High Resolution Limited Area Model (HIRLAM) version 6.4.0 outputs to describe wind parameters in the coastal zone of Estonia were investigated. For this purpose output from 3-dimensional variational (3DVAR) analysis and 24 h forecast files were compared with measurements at nine coastal sites during January and April–December 2007. Special attention was paid to moderate and strong winds (wind speed > 5 m/s) that are responsible for sea level changes and high wave heigh...

Ygor Flávio de Moraes Santos, and Átyla Peeter Batista Veloso, and Rodrigo Maciel Calvet, and Maria Marlúcia Gomes Pereira, and Carina Maricel Pereyra, and Ana Maria Dalcero, and Adriana Mabel Torres, and Maria Christina Sanches Muratori

The sodium metabisulphite (SMB) is used in shrimp farming to prevent melanosis and the 5.0 ppm chlorine (CL) concentration used in the shrimp processing is efficient as a bactericide, but there is no evidence of the effectiveness of these chemical compounds as fungicides. Therefore, the aim of this study was to evaluate the in vitro effect of sodium metabisulphite (SMB) and chlorine (CL) on the growth of Aspergillus and Penicillium species isolated from marine shrimp in different stages of proce...

Héctor Toledo Muñoz, and Sara Zelada Muñoz, and Carmen Soto Martínez

A new didactical curriculum model for teaching science based on aquatic resources has been applied to a group four hundred and fourteen students from primary education, just in establishments situated on the coastal edge of the Tenth Region of Los Lagos, Chile. The themes of the learning strategy were suggested activities in science texts, drawn from interdisciplinary workshops involving classroom teachers, aquatic resources, professional didactic teaching, marine ecology experts, geneticist, se...

Gilda Schmidt

The phytoplankton Ks anã Vmax as a function of ammonium and nitrate concentrations were determined. The growth rate was estimated from measurements on synthesized chlorophyll-&#945; and the cell number in the. culture media. The uptake rate was determined as to the consumption of ammonium and nitrate after the nutrients depletion from culture media.<br>Foram determinadas a Ks e a Vmax do fi toplancton natural, em função da concen tração de amonia e nitrato. A velocida de de crescimento foi deter...

Pedro Henrique Cipresso Pereira, and João Lucas Leão Feitosa, and Beatrice Padovani Ferreira

The present study analyzed heterotypic schooling behavior and protective mimicry relationships involving species of the genus Haemulon and other coral reef fishes on coastal reefs at Tamandaré, Pernambuco State, Northeastern Brazil. The work was performed during 35 hours of direct observation using the "focal animal" method. The observed events involved 14 species of reef fish in eight different families. The phenomenon of mixed schooling appeared to be related to the large number of individuals...

Priscila Izabel Tremarin, and Hermes Moreira-Filho, and Thelma Alvim Veiga Ludwig

O estudo das Pinnulariaceae do rio Guaraguaçu baseou-se em 29 amostras planctônicas e perifíticas coletadas em seis estações de coleta ao longo do leito do rio. A análise qualitativa das amostras permitiu a identificação de 36 espécies, 14 variedades e uma forma taxonômica: Caloneis bacillum, C. hyalina, C. formosa, C. westii, Pinnularia acoricola, P. acrosphaeria, P. acrosphaeria f. minor, P. acuminata var. acuminata, P. acuminata var. novazealandica, P. borealis var. rectangularis, P. braunian...

Rafael A. Dias, and Vinicius A. G. Bastazini, and Andros T. Gianuca

Nearly all remnants of temperate grasslands in southeastern South America are used for livestock ranching and are subject to habitat degradation resulting from this activity. Exploring how habitat features affect the composition of grassland avifaunal communities is a first step to understand how current cattle-ranching management practices impact avian diversity. We used canonical ordination to test for relationships between five habitat variables and the composition of the bird community in co...

Lidia Dzierzbicka-Głowacka

The paper presents a one-dimensional Coupled Ecosystem Model (1<i>D</i>CEM) consisting of three submodels: a meteorological submodel for the physics of the upper layer and a biological submodel, which is also driven by output from the physical submodel. The biological submodel with a high-resolution zooplankton module and a simple prey-predator module consists of seven mass conservation equations. There are six partial second-order differential equations of the diffusion type for phytoplankton, ...

T.M.A. Silva, and L.G. Alves, and K.C.S. de Queiroz, and M.G.L. Santos, and C.T. Marques, and S.F. Chavante, and H.A.O. Rocha, and E.L. Leite

The brown algae Padina gymnospora contain different fucans. Powdered algae were submitted to proteolysis with the proteolytic enzyme maxataze. The first extract of the algae was constituted of polysaccharides contaminated with lipids, phenols, etc. Fractionation of the fucans with increasing concentrations of acetone produced fractions with different proportions of fucose, xylose, uronic acid, galactose, and sulfate. One of the fractions, precipitated with 50% acetone (v/v), contained an 18-kDa ...

A.C Fonseca E, and H. K Dean, and J Cortés

Coral reef status was surveyed in three south Pacific coral reefs of Costa Rica, one in Caño Island and two in Golfo Dulce, and the density, richness and distribution of non-colonial macro borers (>1 mm)was determined in dead and live coral fragments from these reefs. Based upon traditional indicators of degradation such as high particulate suspended matter and low live coral cover, the reefs at Caño Island are in better condition than those at Golfo Dulce. Reef degradation in Golfo Dulce is mai...

Patrick Reis-Santos, and Patrick Reis-Santos, and Rita P. Vasconcelos

Connectivity and population structure are influenced by physical, biological and ecological processes and interactions that impact over a range of temporal scales. Therefore the best inference on population connectivity may be achieved by using multiple and potentially complementary techniques that integrate over different spatio-temporal scales. In the present study, we examined natal origin, movement and population structure of European flounder Platichthys flesus and Senagelense sole Solea se...

Masahiko Nakata, and Keisuke Ishii, and Masahiro Sumie, and Mayumi Takano, and Hiroko Hirata, and Susumu Murata, and Yuichiro Takahashi, and Takeshi Murakoshi, and Haruhiko Sago

Objective: The aim of this study is to clarify the feasibility and efficacy of fetoscopic laser photocoagulation of placental vascular communicating vessels (FLP) on twin–twin transfusion syndrome (TTTS) after 26 weeks of gestation. Materials and Methods: This is a prospective pilot study investigating all cases of TTTS between 26 weeks and 27 weeks during 2012 and 2013 in Japan. The primary endpoints in this study were the feasibility of FLP and rate of harmful complications for the mother's he...

Michelle Greiver, and Jan Barnsley, and Babak Aliarzadeh, and Paul Krueger, and Rahim Moineddin, and Debra Butt, and Edita Dolabchian, and Liisa Jaakkimainen, and Karim Keshavjee, and David White, and David Kaplan

<strong>Background</strong> The quality of electronic medical record (EMR) data is known to be problematic; research on improving these data is needed. <strong>Objective</strong> The primary objective was to explore the impact of using a data entry clerk to improve data quality in primary care EMRs. The secondary objective was to evaluate the feasibility of implementing this intervention. <strong>Methods</strong> We used a before and after design for this pilot study. The participants were 13 co...

Anonymous

A. Malinka, and E. Zege, and G. Heygster, and L. Istomina

White ice (ice with a highly scattering granular layer on top of its surface) and snow-covered ice occupy a large part of the sea ice area in the Arctic, the former in summer, the latter in the cold period. The inherent optical properties (IOPs) and the reflectance of these types of ice are considered from the point of view of the light scattering and radiative transfer theories. The IOPs &ndash; the extinction and absorption coefficients and the scattering phase function &ndash; are derived wit...

Takeo eFujiwara, and Rie eMizuki, and Takahiro eMiki, and Claude eChemtob

Emotional numbing is a symptom of post-traumatic stress disorder (PTSD) characterized by a loss of interest in usually enjoyable activities, feeling detached from others, and an inability to express a full range of emotions. Emotional numbing is usually assessed through self-report, and is particularly difficult to ascertain among young children. We conducted a pilot study to explore the use of facial expression ratings in response to a comedy video clip, and to assess emotional reactivity among...

navid sharifi, and akbar amin bidbakhti

Programs related to recreation and tourism is considered economic, social and cultural phenomena. Some experts conceive tourism as a driving force for the economic development of countries. In this regard, adopting appropriate solutions to increase feelings of trust and security within tourists visiting a region is crucial in attracting tourists. The present research is descriptive-correlation type and offers a model capturing the relationship between social capital and the tourist boom in the C...

Soumya Patra, and Basant Kumar, and Kaushal K Harlalka, and Apoorva Jain, and H M Bhanuprakash, and K S Sadananda, and Harsha Basappa, and K Santhosh, and K S Rajith, and K S Bharathi, and C N Manjunath

Background: In acute decompensated heart failure (ADHF), diuretic use, the mainstay therapy for congestion, is associated with electrolyte abnormalities and worsening renal function. Vasopressin mediates fluid retention in heart failure. In contrast to diuretics, the vasopressin antagonist tolvaptan may increase net volume loss in heart failure without adversely affecting electrolytes and renal function. Hyponatremia (serum sodium concentration, <135 mEq/L) is a predictor of death among patients...

Roberto Blanes Andrés

This article introduces us in what must have been the Alicante export maritime trade destined to the capital of the Turia (Valencia) during large part of the reigning of Felipe the 4th. The date was compiled from «the Valencia Kingdom's Archive» more specifically from the section «Racional Maser, series Peatge del Mar-Sea Toll». The study of this information has given us the opportunity to get to know characteristics and various aspects of the trading dynamics established between these two citie...

Trina Fyfe, and Liz Dennett

Introduction: A well thought out, comprehensive search is the foundation for all systematic review research. Consequently, working on a first systematic review search can be intimidating. Articles and workshops, being less intensive than one-on-one training, are unlikely to instil enough confidence in one's ability to do a good job in this process. In this pilot program, an ongoing mentoring relationship was created as a means of building capacity and confidence in systematic review searching. D...

Lucy G. Hargreaves

Alessandro Lucchetti, and Claudio Vasapollo, and Massimo Virgili

The loggerhead sea turtle (Caretta caretta, Linnaeus, 1758) is the most abundant sea turtle species in the Mediterranean Sea, where commercial fishing appears to be the main driver of mortality. So far, information on sea turtle bycatch in Italy is limited both in space and time due to logistical problems in data collected through onboard observations and on a limited number of vessels involved. In the present study, sea turtle bycatch in Italian waters was examined by collecting fishermen’s inf...

J. J. Castro, and J. A. Santiago, and V. Hernández-García

Sixteen fish aggregation devices (FADs) were deployed in 50 to 500 m deep of water in the Canary Islands. Species composition and abundance were determined by visual census carried out by divers on 55 occasions from April to October 1995 and from August 1996 to May 1997. A total of 15 species representing nine families of fish were observed. Pseudocaranx dentex (Bloch and Schneider, 1810), Seriola spp. and Naucrates ductor (Linnaeus, 1758) were the most abundant species. The number of species as...

Ramzy B. Nessim, and Hermine R.Z. Tadros, and Amaal E.A. Abou Taleb, and Madelyn N. Moawad

Investigation on the major ions of seawater; Na+, K+, Ca++, Mg++, SO4− and Br− is based on more than 660 samples collected at 21 sections distributed along the Egyptian Mediterranean coast starting from Salloum to Arish during summer (2008), in addition to some samples taken at certain sections during spring (2008) and the winters of 2008, 2009 and 2010. In respect of the analysed major ions, the total average content (mg/l) and their corresponding chlorinity ratios are as follows: Na+; 12,337, ...