Factors affecting abundance and oviposition rates of a field population of the Old World screw-worm fly, Chrysomya bezziana (Diptera: Calliphoridae)

2004 ◽  
Vol 94 (4) ◽  
pp. 359-368 ◽  
Author(s):  
R.J. Mahon ◽  
H. Ahmad ◽  
K.G. Wardhaugh
Keyword(s):  
Weather Conditions ◽  
Total Rainfall ◽  
Old World ◽  
Factors Affecting ◽  
Malaysian Population ◽  
Early Evening ◽  
Catch Rates ◽  
Trap Catches ◽  
The Relationship ◽  
Chrysomya Bezziana

AbstractSentinel cattle and a grid of swormlure-baited sticky traps were used to monitor a Malaysian population of the Old World screw-worm fly, Chrysomya bezziana Villeneuve. Observations were carried out on an isolated cattle station at monthly intervals during the period August 1996 to June 2000. The number of flies caught was unaffected by weather conditions at the time of trapping, but was positively correlated with the total rainfall and the average daily air temperature prevailing 15–28 days earlier, when trapped flies were still juveniles. Trap catches were biased in favour of females, but daily catch rates of both sexes increased significantly the longer traps were open, suggesting that efficacy was related to the differential volatility of the chemicals comprising swormlure. Oviposition on sentinel cattle occurred mostly in late afternoon or early evening but increased significantly as the wound aged. Oviposition rates were positively correlated with female catch rates, but the relationship was curvilinear, suggesting that fly populations may be subject to some form of density-dependent constraint. Consistent differences in oviposition rates on sentinel cattle at different localities on the cattle station suggested the existence of highly clumped, quasi-stationary populations. Differences in trap catches between traps located in pastoral areas and those sited in nearby oil palm or rubber plantations supported this interpretation of the data. These findings are discussed in relation to the use of the sterile insect technique for the control of screw-worm fly infestations.

scholarly journals Factors affecting waterfowl hunting and harvest at the Evros delta, Greece

2020 ◽  
Vol 150 ◽  
Author(s):  
Savas Kazantzidis ◽  
Christos Astaras ◽  
Ioakim Vasiliadis ◽  
Eleni Makrygianni ◽  
Vassilis Ilias ◽  
...  
Keyword(s):  
Habitat Management ◽  
Weather Conditions ◽  
Abundant Species ◽  
Protected Species ◽  
Factors Affecting ◽  
Management Actions ◽  
Hunting Activity ◽  
Wintering Waterfowl ◽  
Waterfowl Hunting ◽  
The Relationship

The Evros delta is one of the most important wetlands for wintering waterfowl in Greece and the most popular among waterfowl hunters. This study addresses hunting activity and harvest while also investigating the relationship between weather conditions and hunting activity to suggest ways of improving waterfowl management. We counted wintering waterfowl and hunter numbers, and conducted hunter bag surveys during December–February over four hunting seasons. We calculated a 10-day goose and duck Preferential Shooting Index (PSI), which is the ratio of observed number of shot birds to the number of birds expected to have been shot if the birds were shot in proportion to their availability. Common Teal, Mallard and Greater White-fronted Goose were the most abundant species both in the field and in hunter bags. The mean number of hunters/day was 99.9, with each one shooting on average 2.5 birds/day. The overall waterfowl harvested accounted for 1.3% of the total waterfowl population. For geese this proportion was six times higher (8.7%), while for ducks alone and protected species was 1.2% and 1.4% respectively. Geese were shot more often than expected (PSI 6.55), while ducks and protected species were shot according to their availability (PSI 0.86 and 1.02, respectively). Wind speed, precipitation and geese number in the field were the best predictors of overall harvest and number of hunters. To reduce goose overshooting and the probability of protected species being accidentally shot, we suggest habitat management actions for the geese feeding areas and hunters’ awareness raising.

scholarly journals Identification of Weather Conditions Associated with the Occurrence, Severity, and Incidence of Black Seed Disease of Strawberry Caused by Mycosphaerella fragariae

2018 ◽  
Vol 108 (1) ◽  
pp. 83-93 ◽  
Author(s):  
Odile Carisse ◽  
Vanessa McNealis
Keyword(s):  
Nonlinear Models ◽  
Weather Conditions ◽  
Total Rainfall ◽  
Crop Losses ◽  
Black Seed ◽  
Management Actions ◽  
Disease Occurrence ◽  
Sporadic Disease ◽  
Mycosphaerella Fragariae ◽  
The Relationship

Black seed disease (BSD) of strawberry is a sporadic disease caused by Mycosphaerella fragariae. Because little is known about potential crop losses or the weather conditions conducive to disease development, fungicides are generally not applied or are applied based on a preset schedule. Data collected from 2000 to 2011 representing 50 farm-years (total of 186 strawberry fields) were used to determine potential crop losses and to study the influence of weather on disease occurrence and development. First, logistic regression was used to model the relationship between occurrence of BSD and weather variables. Second, linear and nonlinear regressions were used to model the number of black seed per berry (severity) and the percentage of diseased berries (incidence). Of the 186 fields monitored, 78 showed black seed symptoms, and the number of black seed per berry ranged from 1 to 10, whereas the percentage of diseased berries ranged from 3 to 32%. The most influential weather variable was total rainfall (in millimeters) in May, with a threshold of 103 mm of rain (absence of BSD < 103 mm < presence of BSD). Similarly, nonlinear models with the total rainfall in May accurately predicted both disease severity and incidence (r = 0.94 and 0.97, respectively). Considering that management actions such as fungicide application are not needed every year in every field, these models could be used to identify fields that are at risk of BSD.

Residents and Tourists as a Complementary Target Markets of Outdoor Event Organizes in Terms of Variable Weather Conditions. The Case of the Saint Dominic’s Fair in Poland

2021 ◽  
Vol 12 (4) ◽  
pp. 895
Author(s):  
Robert BĘBEN ◽  
Izabela DEMPC ◽  
Sylwia KUCZAMER-KŁOPOTOWSKA
Keyword(s):  
Weather Conditions ◽  
Base Station ◽  
Social Changes ◽  
Factors Affecting ◽  
Market Participants ◽  
Mobile Phone Base Station ◽  
Variable Weather ◽  
The Impact ◽  
The Relationship ◽  
Target Markets

The development of technology, climate change as well as the cultural and social changes cause people to change their behavior, modify priorities and adapt to the new situation. Effectiveness and competitiveness, therefore, require up-to-date information on the market participants and factors affecting their behavior. As such, the aim of this article is to illustrate the impact of the weather conditions on participants’ attendance at various urban outdoor events, crucial for a leisure market. The study presents the relationship between the number of residents and tourists visits at the St. Dominic’s Fair in Gdańsk during individual days of the event and the weather conditions (temperature, precipitation, and sunlight intensity). As one of the data illustration methods, mobile phone-base-station logs were used to analyze consumer behavior. The study proved varying behavior of the residents and the tourists participating in the same event under different weather conditions emphasize these two diverse target markets’ complementarities.

Exploring Strategic Factors for Promoting Blood Donation Campaign

2019 ◽  
Vol 5 (3) ◽  
pp. 79
Author(s):  
Nur Shahrulliza Muhammad ◽  
Fairus Hamdan ◽  
Helmi Norman ◽  
Amie Azida Yunus
Keyword(s):  
Blood Donation ◽  
Subjective Norms ◽  
Motivating Factors ◽  
Public And Private ◽  
Factors Affecting ◽  
The Public ◽  
Malaysian Population ◽  
Strategic Factors ◽  
Donation Intention ◽  
The Relationship

Approximately 2.2 percent of the Malaysian population donates blood each year, compared to the standard expectation of 5 percent. It is a sign that this country will experience insufficient blood supply in the future. This worrying statistic has led to the exploration of blood donation decision-making conducted worldwide for the purpose to understand the factors that will help to encourage the publics to donate blood. Understanding the intention-based Theory of Planned Behavior (TPB) helps the researchers to develop targeted campaigns based on specified factors from the pool survey. These TPB factors among Malaysian adults have not yet been fully investigated. Thus, the survey was administered to respondents concerning potential motivating factors based on the suggested TPB elements in their decision to donate blood. The study was conducted on Malaysian adults working in the public and private sectors. This study was to identify the correlation and regression value to identify the relationship between the factors and to infer causal relationships between the factors. The result shows that there is a significant relationship between the subjective norms with the blood donation intention. The potential discouraging factors need to be addressed to ensure future decision whether or not to donate blood might be inflected. However, this study has pointed out for further investigation on factors affecting the donor intention and decision to donate the blood among Malaysian adults.

Factors affecting blue goose nesting success

1971 ◽  
Vol 49 (2) ◽  
pp. 223-234 ◽  
Author(s):  
John Michael Harvey
Keyword(s):  
Weight Loss ◽  
Heat Loss ◽  
Weather Conditions ◽  
Incident Radiation ◽  
Nesting Success ◽  
Factors Affecting ◽  
Herring Gulls ◽  
Simulated Environment ◽  
Weather Parameters ◽  
The Relationship

Blue geese at McConnell River, N.W.T., lost 20% of eggs, mostly late in incubation. Parasitic jaegers and herring gulls were attracted to the colony and were efficient at finding eggs although geese defended their nests strongly. Since egg loss could only occur in the absence of both geese, jaegers, and gulls acted as scavengers rather than predators. Factors causing desertion were the true causes of egg loss. These may have been inexperience of younger geese, or starvation during incubation.During nesting, geese had very little to eat and lost about 25% of spring weight. While the birds were fasting, weight loss is a function of heat loss, in turn controlled by weather conditions. The relationship between heat loss and several weather parameters was determined by means of a water-heated model goose in a simulated environment. This relationship allowed prediction of heat loss, and hence weight loss, from air temperature, wind speed, incident radiation, and goose surface temperature.Severe weather could result in considerable weight loss and it is suggested that this impaired the goose's ability to incubate steadily. Extreme weight loss could result in death, and many nesting geese were found apparently starved during the hatch.

The Relationship Analysis of Temperature and Electric Load

2012 ◽  
Vol 256-259 ◽  
pp. 2644-2647 ◽  
Author(s):  
Heng Hua Shi ◽  
Wen Guo Weng ◽  
Zheng Gan Zhai ◽  
Xiao Le Zhang
Keyword(s):  
Electric Power ◽  
Power Supply ◽  
Weather Conditions ◽  
Living Standard ◽  
Electric Load ◽  
Factors Affecting ◽  
Large Cities ◽  
Electric Power Supply ◽  
Relationship Analysis ◽  
The Relationship

With the improvement of the living standard of the people and the limit of the electric power supply, the shortage problem of the electric power are more and more serious in large cities. There are many factors affecting the requirement of urban electric power supply such as urban population, the structure and the scale of economic, the he weather conditions, etc. Based on the actual data of Beijing from 2008 year to 2009 year, we quantitatively analyze the relationship of temperature and electric load with regression analysis method. The result can provide the changing rules of the electric load with temperature and give some suggestions on improving urban electric power supply.

The analysis and standardisation of trap catches of Lucilia cuprina (Wiedemann) (Diptera: Calliphoridae)

1983 ◽  
Vol 73 (4) ◽  
pp. 609-617 ◽  
Author(s):  
W. G. Vogt ◽  
T. L. Woodburn ◽  
R Morton ◽  
B. A. Ellem
Keyword(s):  
Relative Humidity ◽  
Solar Radiation ◽  
Weather Conditions ◽  
Time Of Day ◽  
Lucilia Cuprina ◽  
Weather Variables ◽  
Wind Speeds ◽  
Air Temperatures ◽  
Catch Rates ◽  
Trap Catches

AbstractField populations of Lucilia cuprina (Wied.) in New South Wales were sampled for periods of 3 h on numerous occasions between 1975 and 1982 using West Australian blowfly traps. Ambient temperature, wind speed, relative humidity and solar radiation explained 77·4% of the within-day deviance of the catches. Temperature alone accounted for 74·9% of this deviance, indicating that the other variables, although significant, did not greatly affect trap catches. As air temperatures increased, log catch rates increased linearly up to 26°C and then remained constant up to 35°C. Wind speeds above 25 m/s caused a linear decline in log catch rates. Log catch rates increased linearly as solar radiation increased and decreased linearly as relative humidity increased. Changes in catch rates with time of day were explained almost entirely by the four weather variables, i.e. there was no evidence that intrinsic behavioural changes with time of day affected catch rates. The combined effects of the four weather variables accounted for 47·1 % of the between-day variation in trap catches. Trap catches that have been standardised, i.e. adjusted to a ‘ standard’ set of weather conditions, provide relative measures of population size which differ from absolute measures by a constant (unknown) scaling factor.

Poetic Trespass

2014 ◽  
Author(s):  
Lital Levy
Keyword(s):  
Twentieth Century ◽  
Visual Art ◽  
Prose Poetry ◽  
Old World ◽  
History And Literature ◽  
Political Boundaries ◽  
Depth Study ◽  
Emile Habiby ◽  
The Relationship ◽  
The Way

A Palestinian-Israeli poet declares a new state whose language, “Homelandic,” is a combination of Arabic and Hebrew. A Jewish-Israeli author imagines a “language plague” that infects young Hebrew speakers with old world accents, and sends the narrator in search of his Arabic heritage. This book brings together such startling visions to offer the first in-depth study of the relationship between Hebrew and Arabic in the literature and culture of Israel/Palestine. More than that, the book presents a captivating portrait of the literary imagination's power to transgress political boundaries and transform ideas about language and belonging. Blending history and literature, the book traces the interwoven life of Arabic and Hebrew in Israel/Palestine from the turn of the twentieth century to the present, exposing the two languages' intimate entanglements in contemporary works of prose, poetry, film, and visual art by both Palestinian and Jewish citizens of Israel. In a context where intense political and social pressures work to identify Jews with Hebrew and Palestinians with Arabic, the book finds writers who have boldly crossed over this divide to create literature in the language of their “other,” as well as writers who bring the two languages into dialogue to rewrite them from within. Exploring such acts of poetic trespass, the book introduces new readings of canonical and lesser-known authors, including Emile Habiby, Hayyim Nahman Bialik, Anton Shammas, Saul Tchernichowsky, Samir Naqqash, Ronit Matalon, Salman Masalha, A. B. Yehoshua, and Almog Behar. By revealing uncommon visions of what it means to write in Arabic and Hebrew, the book will change the way we understand literature and culture in the shadow of the Israeli–Palestinian conflict.

The number of employed as a macroeconomic indicator of working time dynamics

2020 ◽  
Vol 16 (5) ◽  
pp. 935-945
Author(s):  
I.A. Zaikova
Keyword(s):  
Comparative Analysis ◽  
Manufacturing Sector ◽  
Working Hours ◽  
Working Time ◽  
Labor Costs ◽  
Factors Affecting ◽  
Time Dynamics ◽  
Developed Economies ◽  
The Relationship ◽  
Macroeconomic Indicator

Subject. The working time of workers at any stage of economic development is a value reflecting the level of labor productivity. Any progress in productivity contributes to changes in the volume of labor costs and the number of employed. Depending on the relationship between the total volume of labor costs and the number of employed, the duration of working time per one worker may change (it may increase, decrease, or remain unchanged). Objectives. The study aims to confirm the importance of such a macroeconomic indicator as the number of employed in varying working hours. Methods. The study rests on the comparative analysis of countries with developed economies based on some indicators like dynamics of the working time fund, dynamics of the number of employed, average number of hours worked during the year per employee, etc. The analyzed timespan is 25 years (from 1991 to 2016). Results. The comparative analysis revealed that in the non-production sphere and the economy as a whole the macroeconomic determinants correlate so that the length of working time per worker reduces. When considering the analysis results for the manufacturing sector, no single trend was identified. Conclusions. One of the key factors affecting the change in working hours is the number of employed. The relationship between the working time fund and the number of employed directly determines the dynamics of working time per worker.

Sign in / Sign up

Export Citation Format

Share Document