Seasonal patterns of age-composition of sylvan mosquito populations in Uganda (Diptera, Culicidae)

1963 ◽  
Vol 54 (2) ◽  
pp. 213-227 ◽  
Author(s):  
Philip S. Corbet
Keyword(s):  
Virus Isolation ◽  
Ground Level ◽  
Total Sample ◽  
Main Peak ◽  
Seasonal Patterns ◽  
Short Term ◽  
Age Composition ◽  
Tree Hole ◽  
Small Container ◽  
Age Grading

Fifty-two standardised weekly collections of female mosquitos were made by human catchers at ground-level in lake-side forest near Entebbe, Uganda. The numbers of nullipars and pars in each sample were recorded, in order to determine whether the capacity of these mosquito populations to transmit virus varied seasonally. Methods are described for handling large catches for the purpose of identifying and age-grading. The total sample comprised 31,978 mosquitos belonging to 37 or more species. Results for 15 species are presented in detail.The nulliparous rate (i.e., the number of nullipars as a percentage of total females) differs markedly between species, but relatively little within species. Certain species of Mansonia (Coquillettidia), mainly swamp breeders, have the highest nulliparous rate, and species of Aedes and Eretmapodites, which breed in small containers, have the lowest. In some species, biting females show a lower nulliparous rate than those caught resting.Culex annulioris Theo. and species of Mansonia, which are swamp breeders, have a main peak of abundance between May and July, during the main rains and when lake-level is highest. Species of Aedes (Stegomyia), which are tree-hole or small-container breeders, show small, irregular, short-term fluctuations in numbers.The number of pars, an epidemiologically important parameter, is absolutely highest at or soon after the time of greatest abundance. For certain bird-biting mosquitos, namely, Culex annulioris and species of Mansonia (Coquillettidia), most pars are found during the main rains, when susceptible hosts are also most numerous. Implications of these findings on virus-isolation programmes are briefly discussed.

Seasonal Variation of Suicide in the City of São Paulo, Brazil, 1996–2010

Crisis ◽  
2014 ◽  
Vol 35 (1) ◽  
pp. 5-9 ◽  
Author(s):  
Daniel Hideki Bando ◽  
Fernando Madalena Volpe
Keyword(s):  
Seasonal Pattern ◽  
Total Sample ◽  
Sao Paulo ◽  
Seasonal Patterns ◽  
São Paulo ◽  
Health Statistics ◽  
Males And Females ◽  
June July ◽  
The City ◽  
Over Time

Background: In light of the few reports from intertropical latitudes and their conflicting results, we aimed to replicate and update the investigation of seasonal patterns of suicide occurrences in the city of São Paulo, Brazil. Methods: Data relating to male and female suicides were extracted from the Mortality Information Enhancement Program (PRO-AIM), the official health statistics of the municipality of São Paulo. Seasonality was assessed by studying distribution of suicides over time using cosinor analyses. Results: There were 6,916 registered suicides (76.7% men), with an average of 39.0 ± 7.0 observed suicides per month. For the total sample and for both sexes, cosinor analysis estimated a significant seasonal pattern. For the total sample and for males suicide peaked in November (late spring) with a trough in May–June (late autumn). For females, the estimated peak occurred in January, and the trough in June–July. Conclusions: A seasonal pattern of suicides was found for both males and females, peaking in spring/summer and dipping in fall/winter. The scarcity of reports from intertropical latitudes warrants promoting more studies in this area.

scholarly journals Virus isolation studies suggest short-term variations in abundance in natural cyanophage populations of the Indian Ocean

2006 ◽  
Vol 86 (3) ◽  
pp. 499-505 ◽  
Author(s):  
Martha R.J. Clokie ◽  
Andrew D. Millard ◽  
Jaytry Y. Mehta ◽  
Nicholas H. Mann
Keyword(s):  
Indian Ocean ◽  
Surface Waters ◽  
Molecular Diversity ◽  
Virus Isolation ◽  
Short Term ◽  
Distinct Subgroup ◽  
Time Points ◽  
The Indian Ocean ◽  
Long Timescales ◽  
Time Point

Cyanophage abundance has been shown to fluctuate over long timescales and with depth, but little is known about how it varies over short timescales. Previous short-term studies have relied on counting total virus numbers and therefore the phages which infect cyanobacteria cannot be distinguished from the total count.In this study, an isolation-based approach was used to determine cyanophage abundance from water samples collected over a depth profile for a 24 h period from the Indian Ocean. Samples were used to infect Synechococcus sp. WH7803 and the number of plaque forming units (pfu) at each time point and depth were counted. At 10 m phage numbers were similar for most time-points, but there was a distinct peak in abundance at 0100 hours. Phage numbers were lower at 25 m and 50 m and did not show such strong temporal variation. No phages were found below this depth. Therefore, we conclude that only the abundance of phages in surface waters showed a clear temporal pattern over a short timescale. Fifty phages from a range of depths and time points were isolated and purified. The molecular diversity of these phages was estimated using a section of the phage-encoded psbD gene and the results from a phylogenetic analysis do not suggest that phages from the deeper waters form a distinct subgroup.

scholarly journals Birds and bats captured in a managed forest in Southwestern Brazilian Amazonia: Results and recommendations from a short-term study

2019 ◽  
Vol 6 (12) ◽  
pp. 283-295
Author(s):  
Diego Pedroza ◽  
Rair de Sousa Verde ◽  
Edson Guilherme
Keyword(s):  
Activity Pattern ◽  
Ground Level ◽  
Trophic Guilds ◽  
Clear Pattern ◽  
Managed Forest ◽  
Short Term ◽  
Term Study ◽  
Short Term Study ◽  
Pattern Of Variation ◽  
Capture Rates

Understanding the activity pattern and the height of capture of birds and bats can help to optimize the sampling of both groups. Our aimed was to determine the rates of capture at different times of day/night, and the overlap in the height of capture; classify the trophic guilds, and check variation in the capture rates of the birds and bats. We conducted the study in the Antimary State Forest, in March, 2017. We set mist-nets at the same location during five consecutive days, and were open between 06:00 h and 00:00 h. The birds presented a bimodal activity pattern, as well as bats. Bats were captured at higher levels than birds. Most of the birds captured were insectivores, where as most of the bats were frugivores. Neither group presented a clear pattern of variation in capture rates. Therefore, the first hours of the morning are fundamental for the capture of birds. For bats, we would recommend the captures only after 17:00 h. Mist-nets should be set at ground level for birds, whereas for bats, they should be set above a height of 0.5 m. Thus, the captures should be optimized.

Short-term effects of herbage allowance on milk production, milk composition and grazing time of cows grazing nitrogen-fertilized tropical grass pasture

1977 ◽  
Vol 17 (89) ◽  
pp. 892 ◽  
Author(s):  
TH Stobbs
Keyword(s):  
Milk Production ◽  
Milk Fat ◽  
Latin Square ◽  
Ground Level ◽  
Short Chain Fatty Acids ◽  
Lower Percentage ◽  
Panicum Maximum ◽  
Fat Percentage ◽  
Short Term ◽  
Short Term Effects

The short-term effects of varying the quantities of herbage allocated (15, 25, 35, 55 kg DM cow-1, day-1) to lactating Jersey cows strip grazing 3-week regrowths of nitrogen-fertilized Panicum maximum cv. Gatton panic pastures, upon the diet selected, milk production, milk and milk fat composition and grazing time, were measured. Sixteen cows were used in a latin-square design with experimental periods of 1 4 days. With increasing herbage allowance milk yields rose, averaging 8.9, 9.9, 10.4 and 10.6 kg milk cow-1, day-1 respectively. A lower solids-not-fat percentage in milk from cows receiving 15 kg DM cow-1, day-1 and a lower percentage protein from cows receiving 15 and 25 kg DM cow-1 day-1 indicated a lower intake of digestible energy by cows at these lower herbage allowances. Molar percentages of short-chain fatty acids in milkfat (C6, C8, C10, C14) increased linearly and oleic acid (C18:1) decreased linearly as herbage allowance increased, showing that a higher proportion of the milk fat was coming from energy in the feed and a smaller proportion from body reserves. Cows selectively grazed leaf from the uppermost layers of the swards. As herbage allowance was restricted, a higher proportion of pasture was eaten and this came mainly from pasture growing 10 cm or more above ground level. Total time spent grazing was similar for all herbage allowances but the proportion of night grazing was consistently lower at the higher intensities of grazing.

scholarly journals PENGARUH TANGGUNG JAWAB SOSIAL PERUSAHAAN TERHADAP KINERJA PERUSAHAAN PERBANKAN

2019 ◽  
Vol 11 (1) ◽  
pp. 15
Author(s):  
Heni Swastika ◽  
Titik Aryati
Keyword(s):  
Hypothesis Test ◽  
Total Sample ◽  
Short Term ◽  
Asset Turnover ◽  
Corporate Social ◽  
Long Term Performance ◽  
Term Performance ◽  
A Company ◽  
Positive Effect

<p class="Style1"><em>This Thesis is done in order to give empirical prove about Corporate Social </em><em>Responsibily (CSR) related to Company Financial Performance (productivity and value </em><em>of a company). In this Thesis, company's performance devided in short term </em><em>performance and long term performance. Company's short term performance is company's productivy based on Asset Turnover (ATO), while Company's long term </em><em>pe</em><em>4</em><em>formance </em><em>is company's value </em><em>based on Price to Book Value (PBV). Corporate Social Reponsibility (CSR) performance is measured with Sustainability Report Disclosure Index (SRDI). Population used in this thesis is the company that have been registered in Bursa Efek Indonesia (BEI) in a certain period between 2012 until 2014. Total sample for this Thesis are 31 Banking company which is chosen using purposive sampling method. The data for this thesis is analyzed using classical assumption test and hypothesis test using Doubled Linear Regression. This research proves that Corporate Social Responsibility (CSR) brings positive effect related to Productivity of a Company and Value of a Company.</em></p>

scholarly journals OCCUPATIONAL MORTALITY AND MORBIDITY AMONG COAL WORKERS AND MINING COMMUNITIES PROXIMATE TO COAL MINING AREAS- A CASE STUDY OF JAINTIA HILLS DISTRICT IN MEGHALAYA

2021 ◽  
pp. 49-60
Author(s):  
Wistful In Excelsis Nongrem
Keyword(s):  
Household Survey ◽  
Ground Level ◽  
Total Sample ◽  
Small Scale ◽  
Mortality And Morbidity ◽  
Individual Level ◽  
Mining Areas ◽  
Jaintia Hills ◽  
Mining Coal ◽  
Coal Workers

The coal sector of Meghalaya provides the rural people and migrants the means of livelihood. It is an artisanal and small-scale mining which obtain minerals illegally. The present study examines the working conditions and conditions of work of coal workers at the mines which endangers the lives of miners daily. The researcher conducted a household survey with a total sample size of 180 households. Data were collected at the household and individual level surveyed from different coal bearing villages. The problems of environmental degradation are a growing concern to the mined and unmined areas yet on the other side the more complex effects are that unscientific mining is also inextricably associated to different health hazards. The result shows that most mining households with 53% performed work at very deep underground pits of a depth higher than 121 feet below the ground level and 46% of the households reveals to have work in narrow rat holes which are dug horizontally and the distance of its ranging from 1000-1500 metres. Meanwhile the illegal activity pushes to continue extraction into the remote pristine forests which are far from government hospitals, schools, have no transportation service and complete absence of work safety conduct. KEYWORDS: Informal mining, coal workers, rat-hole mines, mortality, morbidity, health conditions, Jaintia Hills, Meghalaya.

Bundelkhand Development Package, Drought and the Development Question in India

Social Change ◽  
2018 ◽  
Vol 48 (3) ◽  
pp. 398-416 ◽  
Author(s):  
Sudhir Kumar Suthar
Keyword(s):  
Ground Level ◽  
Primary Sources ◽  
Policy Framework ◽  
Sources Of Information ◽  
Short Term ◽  
Government Data ◽  
Developmental Policies ◽  
Developmental Policy

This article discusses the case of the Bundelkhand Development Package (BDP). It shows how such short-term developmental policies for drought-affected regions in the country lack long-term policy imagination. The research reveals that there are major gaps between the government’s version of the package’s implementation and the situation at the ground level. The politics behind the package has failed to generate a more cohesive and consensus-based developmental policy framework for the region. Consequently, even after almost a decade, many parts of India continue to face farmers’ suicides and other calamities. The article largely analyses published government data on the progress of the package. It also includes some interviews and narratives as primary sources of information.

Impact of Alternate Fuels on Stationary Gas Turbine Operations and Siting

1974 ◽  
Author(s):  
F. W. Lipfert
Keyword(s):  
Air Quality ◽  
Gas Turbine ◽  
Ground Level ◽  
Quality Standards ◽  
Ambient Air ◽  
Particulate Emissions ◽  
Ambient Air Quality ◽  
Short Term ◽  
Home Heating ◽  
Alternate Fuels

An analysis of gas turbine ambient air quality impact is presented, from the standpoint of the acceptability of alternate fuels having higher sulfur content and possibly higher particulate emissions. Various plume rise formulas are compared, and formulas are given for maximum ground level concentrations for both short term (1 to 3 hr) and intermediate (3 to 24 hr) periods. The results show that the U.S. Federal Air quality standards may allow large gas turbine complexes (∼500 mw) burning up to 1% sulfur fuel, for example. Taking advantage of this capability could increase the supply of lower sulfur fuels for home heating and/or transportation use.

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