The relationship between environmental conditions and activity of the giant barred frog (Mixophyes iteratus) on the Coomera River, south-east Queensland

2007 ◽  
Vol 55 (2) ◽  
pp. 89 ◽  
Author(s):  
Amelia J. Koch ◽  
Jean-Marc Hero
Keyword(s):  
Population Density ◽  
Leaf Litter ◽  
Radio Telemetry ◽  
Climatic Conditions ◽  
Lower Number ◽  
Cold Weather ◽  
Activity Levels ◽  
Climatic Variable ◽  
Individual Activity ◽  
The Relationship

Determining the population density of ectotherms is often confounded by individual activity levels, which are highly dependent on ambient climatic conditions. In this study we used radio-telemetry and streamside surveys to examine the influence of local climatic conditions on individual activity levels (detectability) and streamside density of a population of endangered giant barred frog (Mixophyes iteratus) along the Coomera river in south-east Queensland. Temperature was the most important climatic variable influencing the behaviour and hence detectability of M. iteratus. The results indicated that males bury under the leaf litter during cold conditions (<18°C) so fewer were detected during surveys. Although females were also found to bury under the leaf litter in cold weather, no significant relationship between exposure and streamside density was detected. This is likely to be due to the lower number of females detected during surveys. The streamside density of juveniles was significantly related to temperature and rainfall, but little of the variance in the data was explained by climatic conditions, despite greater numbers of juveniles being found than adults. These results indicate that, for increased efficiency, surveys of Mixophyes iteratus should be undertaken when temperatures exceed 18°C.

Observations on the bionomics of the free-living stages of Trichostrongylus vitrinus

1984 ◽  
Vol 58 (1) ◽  
pp. 49-58 ◽  
Author(s):  
J. H. Rose ◽  
A. J. Small
Keyword(s):  
Tap Water ◽  
Climatic Conditions ◽  
Cold Weather ◽  
Free Living ◽  
Faecal Pellets ◽  
Infective Larvae ◽  
Laboratory Development ◽  
The Relationship ◽  
Very High ◽  
Continuous Freezing

AbstractEggs of Trichostrongylus vitrinus in faecal pellets deposited on grass plots each month from April 1981 to March 1982 developed into infective larvae. From October to March development was slow and mortality of the pre-infective stages was very high. From April to September development was more rapid. The weather was generally dry and mortality of the pre-infective stages was high on plots with short herbage but was lower on most of the plots with long herbage, especially in July and August. In the laboratory, development of eggs into infective larvae was completed at temperatures ranging from 4°C to 27°C in faecal pellets which were either kept moist or dried out slowly, but not in faecal pellets which dried out rapidly. The rate of development increased as the temperature rose. Infective larvae survived for up to 16 months on the herbage of grass plots; some survived during very cold weather in the winter of 1981/82. In the laboratory, infective larvae suspended in tap water survived even longer at 4°C and 10°C but not at higher temperatures. They were rapidly killed by continuous freezing. They Survived for up to 8 weeks when subjected to desiccation, The relationship between climatic conditions and the development and survival of the free-living stages is discussed

Winter performance of a cross-flow automatically controlled naturally ventilated (ACNV) pig finishing house

1986 ◽  
Vol 1986 ◽  
pp. 130-130
Author(s):  
A T Smith ◽  
I A Barrie
Keyword(s):  
Natural Ventilation ◽  
Cross Flow ◽  
Good Control ◽  
Climatic Conditions ◽  
Cold Weather ◽  
Lower House ◽  
Wide Range ◽  
Air Speed ◽  
Ventilation Rates ◽  
The Relationship

Automatically Controlled Natural Ventilation (ACNV) has been shown to give good control over ventilation rates in pig houses under a wide range of climatic conditions (1, 2 and 3). Ventilation control is the principal means of governing the house temperature. A lower house temperature implies higher ventilation rates and a lower concentration of airborne contaminants. In cold weather, therefore, there is an incentive to set the house temperature as low as practical considerations will allow. One important constraint is the temperature variation within the house. The present study was undertaken to determine the magnitude of the temperature variations occurring in a commercial pig finishing house during cold weather. External weather was monitored to determine the relationship between internal temperature patterns and the weather. In addition the use of ceiling fans was investigated to assess their influence on the temperature distribution and air speed at pig level.

ЗУБРЫ НА СЕВЕРЕ РОССИИ — НАСТОЯЩЕЕ И БУДУЩЕЕ

2019 ◽  
pp. 42-44
Author(s):  
I.V. GUSAROV ◽  
V.A. OSTAPENKO ◽  
T.V. NOVIKOVА
Keyword(s):  
Biological Diversity ◽  
Climatic Conditions ◽  
Economic Consequences ◽  
European Bison ◽  
Rare And Endangered Species ◽  
The North ◽  
Rare And Endangered ◽  
Relationship Of ◽  
First Time ◽  
The Relationship

Впервые в мире создана популяция зубров на территории 60 градусов северной широты. В новых климатических условиях разведения и сохранения зубров определены и проанализированы факторы существования вида на севере Европейской части РФ. Выявлены признаки, динамика численности, которые являются составной частью системы, предназначенной для управления биоразнообразием. Интродукция, являясь процессом введения в экосистему нехарактерных для нее видов, может усиливать изменения биоценозов как положительно, так и отрицательно. Насколько быстро и успешно проходит процесс адаптации заселенного вида, и усматривается его влияние на окружающую среду зависит дальнейшее существование зубров и в целом биоразнообразия. В статье обсуждаются вопросы взаимоотношения зубров с другими видами копытных и хозяйственной деятельностью человека, а также дальнейшим использованием зубров в сельскохозяйственном производстве. Пластичность зубров, выявление изменений и их анализ при вселении видов в новые условия обитания необходимы не только для определения развития или деградации биоценозов и в целом экосистемы, но и прогноза социально-экономических последствий интродукции как одного из методов сохранения редких и исчезающих видов фауны.For the first time in the world, a bison population has been created in an area of 60 degrees north latitude. In the new climatic conditions of breeding and preservation of bison, the factors of the species existence in the north of the European part of the Russian Federation are identified and analyzed. The signs, dynamics of abundance, which are an integral part of the system designed to manage biodiversity are identified, since the preservation of biological diversity on the planet is one of the main problems of our time. Introduction, being the process of introducing non-typical species into an ecosystem, can enhance changes in biocenoses, both positively and negatively. The question posing sounds especially when it comes to such a large hoofed animal as the European bison. How quickly and successfully the process of adaptation of the universe takes place and its environmental impact is seen depends on the continued existence of bison and biodiversity in general. The article discusses the relationship of bison with other types of ungulates and human activities, as well as the further use of bison in agricultural production. How these issues will be resolved positively depends on the future of these animals. Thus, the plasticity of bison, the identification of changes and their analysis, with the introduction of species into new habitat conditions is necessary not only to determine the development or degradation of biocenoses and the ecosystem as a whole, but also to predict the socio-economic consequences due to the introduction as one of the methods of preserving rare and endangered species of fauna.

scholarly journals Climate and the spread of COVID-19

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Simiao Chen ◽  
Klaus Prettner ◽  
Michael Kuhn ◽  
Pascal Geldsetzer ◽  
Chen Wang ◽  
...  
Keyword(s):  
Cell Phone ◽  
Visual Inspection ◽  
Climatic Conditions ◽  
Air Travel ◽  
P Value ◽  
Age Dependency ◽  
Similar Extent ◽  
Health Measures ◽  
Age Dependency Ratio ◽  
The Relationship

AbstractVisual inspection of world maps shows that coronavirus disease 2019 (COVID-19) is less prevalent in countries closer to the equator, where heat and humidity tend to be higher. Scientists disagree how to interpret this observation because the relationship between COVID-19 and climatic conditions may be confounded by many factors. We regress the logarithm of confirmed COVID-19 cases per million inhabitants in a country against the country’s distance from the equator, controlling for key confounding factors: air travel, vehicle concentration, urbanization, COVID-19 testing intensity, cell phone usage, income, old-age dependency ratio, and health expenditure. A one-degree increase in absolute latitude is associated with a 4.3% increase in cases per million inhabitants as of January 9, 2021 (p value < 0.001). Our results imply that a country, which is located 1000 km closer to the equator, could expect 33% fewer cases per million inhabitants. Since the change in Earth’s angle towards the sun between equinox and solstice is about 23.5°, one could expect a difference in cases per million inhabitants of 64% between two hypothetical countries whose climates differ to a similar extent as two adjacent seasons. According to our results, countries are expected to see a decline in new COVID-19 cases during summer and a resurgence during winter. However, our results do not imply that the disease will vanish during summer or will not affect countries close to the equator. Rather, the higher temperatures and more intense UV radiation in summer are likely to support public health measures to contain SARS-CoV-2.

scholarly journals Effect of Weave Structure on Thermo-Physiological Properties of Cotton Fabrics

2015 ◽  
Vol 15 (1) ◽  
pp. 30-34 ◽  
Author(s):  
Sheraz Ahmad ◽  
Faheem Ahmad ◽  
Ali Afzal ◽  
Abher Rasheed ◽  
Muhammad Mohsin ◽  
...  
Keyword(s):  
Thermal Resistance ◽  
Cotton Fabrics ◽  
Air Permeability ◽  
Climatic Conditions ◽  
Plain Weave ◽  
Weave Structure ◽  
Physiological Properties ◽  
The Relationship

Abstract This paper aims to investigate the relationship between fabric weave structure and its comfort properties. The two basic weave structures and four derivatives for each selected weave structure were studied. Comfort properties, porosity, air permeability and thermal resistance of all the fabric samples were determined. In our research the 1/1 plain weave structure showed the highest thermal resistance making it suitable for cold climatic conditions. The 2/2 matt weave depicted the lowest thermal resistance which makes it appropriate for hot climatic conditions.

scholarly journals Daily Sitting for Long Periods Increases the Odds for Subclinical Atheroma Plaques

2021 ◽  
Vol 10 (6) ◽  
pp. 1229
Author(s):  
Jose Luis Perez-Lasierra ◽  
Martin Laclaustra ◽  
Pilar Guallar-Castillón ◽  
Jose Antonio Casasnovas ◽  
Jose Antonio Casajús ◽  
...  
Keyword(s):  
Physical Activity ◽  
Subclinical Atherosclerosis ◽  
Sitting Time ◽  
Health Study ◽  
Activity Levels ◽  
Cross Sectional ◽  
Trained Personnel ◽  
Atherosclerosis Development ◽  
Sectional Analysis ◽  
The Relationship

Sedentarism is a risk factor for cardiovascular disease (CVD), but currently it is not clear how a sedentary behavior such as long sitting time can affect atherosclerosis development. This study examined the relationship between sitting time and the prevalence of carotid and femoral subclinical atherosclerosis. A cross-sectional analysis based on a subsample of 2082 participants belonging to the Aragon Workers’ Health Study was carried out. Ultrasonography was used to assess the presence of plaques in carotid and femoral territories; the validated Spanish version of the questionnaire on the frequency of engaging in physical activity used in the Nurses’ Health Study and the Health Professionals’ was used to assess physical activity and sitting time; and demographic, anthropometric, and clinical data were obtained by trained personnel during the annual medical examination. Participants were categorized into <9 h/day and ≥9 h/day sitting time groups. After adjusting for several confounders, compared with participants that remain seated <9 h/day, those participants who remain seated ≥9 h/day had, respectively, OR = 1.25 (95%CI: 1.01, 1.55, p < 0.05) and OR = 1.38 (95%CI: 1.09, 1.74, p < 0.05) for carotid and any-territory plaque presence. Remaining seated ≥9 h/day is associated with higher odds for carotid and any-territory plaque presence independently of physical activity levels and other cardiovascular risk factors.

scholarly journals The relationship between terpenes and flammability of leaf litter

2009 ◽  
Vol 257 (2) ◽  
pp. 471-482 ◽  
Author(s):  
Elena Ormeño ◽  
Blanca Céspedes ◽  
Iván A. Sánchez ◽  
Angel Velasco-García ◽  
José M. Moreno ◽  
...  
Keyword(s):  
Leaf Litter ◽  
The Relationship

Maximal Oxygen Uptake and Daily Physical Activity in 7- to 12-Year-Old Boys

1993 ◽  
Vol 5 (4) ◽  
pp. 357-366 ◽  
Author(s):  
Hazzaa M. Al-Hazzaa ◽  
Mohammed A. Sulaiman
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Oxygen Uptake ◽  
Maximal Oxygen Uptake ◽  
Open Circuit ◽  
Daily Physical Activity ◽  
Activity Level ◽  
Activity Levels ◽  
School Time ◽  
The Relationship

The present study examined the relationship between maximal oxygen uptake (V̇O2max) and daily physical activity in a group of 7- to 12-year-old boys. V̇O2max was assessed through the incremental treadmill test using an open circuit system. Physical activity level was obtained from heart rate telemetry outside of school time for 8 hrs during weekdays and during 40 min of physical education classes. The findings indicated that the absolute value of V̇O2max increased with age, while relative to body weight it remained almost the same across age, with a mean of 48.4 ml · kg−1 · min−1. Moreover, heart rate telemetry showed that the boys spent a limited amount of time on activities that raise the heart rate to a level above 160 bpm (an average of 1.9%). In addition, V̇O2max was found to be significantly related to the percentage of time spent at activity levels at or above a heart rate of 140 bpm, but not with activity levels at or above a heart rate of 160 bpm.

Letters to the Editor

PEDIATRICS ◽  
1963 ◽  
Vol 31 (6) ◽  
pp. 1058-1059
Author(s):  
WILLIAM A. SILVERMAN
Keyword(s):  
Population Density ◽  
Nosocomial Infections ◽  
Specific Recommendation ◽  
Letters To The Editor ◽  
Airborne Infection ◽  
The Relationship

I was saddened to read that Doctor Harvie thinks the Committee on Fetus and Newborn has contributed to creeping authoritarianism by making a specific recommendation after evaluating evidence concerning the relationship between "spacing out" and airborne infection in hospital nurseries. Moreover I think he has misinterpreted the Committee's recommendations if he believes that they have advised nurseries to place sole reliance on reducing population density in order to minimize the risk of nosocomial infections. As Doctor Harvie comments, different modes of spread may be involved in the various types of infection that can be acquired in a newborn nursery.

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