Long-term incubation of adult Nereis virens (Annelida: Polychaeta) in copper-spiked sediment: The effects on adult mortality, gametogenesis, spawning and embryo development

2013 ◽  
Vol 128-129 ◽  
pp. 1-12 ◽  
Author(s):  
G.J. Watson ◽  
J. Pini ◽  
A. Leach ◽  
G. Fones
Keyword(s):  
Embryo Development ◽  
Adult Mortality ◽  
Nereis Virens ◽  
Spiked Sediment

Mending Broken Hearts

2012 ◽  
Vol 53 (1) ◽  
pp. 33-49 ◽  
Author(s):  
Ellen L. Idler ◽  
David A. Boulifard ◽  
Richard J. Contrada
Keyword(s):  
Medical Records ◽  
Lower Risk ◽  
Adult Mortality ◽  
Men And Women ◽  
Never Married ◽  
The Social ◽  
Using Data ◽  
Long Term Mortality

Marriage has long been linked to lower risk for adult mortality in population and clinical studies. In a regional sample of patients ( n = 569) undergoing cardiac surgery, we compared 5-year hazards of mortality for married persons with those of widowed, separated or divorced, and never married persons using data from medical records and psychosocial interviews. After adjusting for demographics and pre- and postsurgical health, unmarried persons had 1.90 times the hazard of mortality of married persons; the disaggregated widowed, never married, and divorced or separated groups had similar hazards, as did men and women. The adjusted hazard for immediate postsurgical mortality was 3.33; the adjusted hazard for long-term mortality was 1.71, and this was mediated by married persons’ lower smoking rates. The findings underscore the role of spouses (both male and female) in caregiving during health crises and the social control of health behaviors.

scholarly journals Tracing Long- and Short-term Migrants for Participation in Demographic and Epidemiological Studies: Evidence from Senegal

Field Methods ◽  
2019 ◽  
Vol 32 (1) ◽  
pp. 38-57
Author(s):  
Mufaro Kanyangarara ◽  
Laetitia Douillot ◽  
Gilles Pison ◽  
Cheikh Tidiane Ndiaye ◽  
Valerie Delaunay ◽  
...  
Keyword(s):  
Rural Areas ◽  
Statistical Power ◽  
Epidemiological Studies ◽  
Adult Mortality ◽  
Short Term ◽  
Middle Income ◽  
Middle Income Countries ◽  
Contact Information

Migration of participants in demographic and epidemiological studies results in missing data. One approach to reduce resulting losses in statistical power and potential biases is to follow up migrants at their new residence. We describe the follow-up of migrants who were eligible for participation in a trial of a new questionnaire to measure adult mortality in Niakhar, Senegal. We conducted a short inquiry in the migrant’s last known household to obtain contact information and then attempted to contact and interview 661 migrants who resided in Dakar, Mbour, and rural areas close to Niakhar. About two-thirds of migrants were successfully enrolled in the study. Having a contact phone number and knowing the name of the head of compound at destination increased the likelihood of successful enrollment. Following up migrants in demographic studies is feasible in low- and middle-income countries, including long-term migrants who have not been contacted for extended periods of time.

scholarly journals Age-Independent Adult Mortality in a Long-Lived Herb

Diversity ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 187 ◽  
Author(s):  
Edelfeldt ◽  
Lindell ◽  
Dahlgren
Keyword(s):  
General Pattern ◽  
Cost Of Reproduction ◽  
Mortality Rates ◽  
Adult Mortality ◽  
Trade Offs ◽  
Age Dependent ◽  
Annual Mortality ◽  
Age Independent ◽  
Long Term Studies

Relative to mammals and birds, little is known about the mortality trajectories of perennial plants, as there are few long-term demographic studies following multiple yearly cohorts from birth to death. This is particularly important because if reproductively mature individuals show actuarial senescence, current estimations of life spans assuming constant survival would be incorrect. There is also a lack of studies documenting how life history trade-offs and disturbance influence the mortality trajectories of plants. We conducted Bayesian survival trajectory analyses (BaSTA) of a 33-year individual-based dataset of Pulsatilla vulgaris ssp. gotlandica. Mortality trajectories corresponded to “Type III” survivorship patterns, with rapidly decreasing annual mortality rates for young plants, but with constant mortality for reproductively mature individuals. We found trade-off effects resulting in a cost of growth for non-reproductive plants but no apparent cost of reproduction. Contrarily to our expectation, young plants that had previously shrunk in size had a lower mortality. However, accounting for trade-offs and disturbance only had minor effects on the mortality trajectories. We conclude that BaSTA is a useful tool for assessing mortality patterns in plants if only partial age information is available. Furthermore, if constant mortality is a general pattern in polycarpic plants, long-term studies may not be necessary to assess their age-dependent demography.

Effects of bait collection on Nereis virens populations and macrofaunal communities in the Solent, UK

2007 ◽  
Vol 87 (3) ◽  
pp. 703-716 ◽  
Author(s):  
G.J. Watson ◽  
P. Farrell ◽  
S. Stanton ◽  
L.C. Skidmore
Keyword(s):  
Management Strategies ◽  
Species Conservation ◽  
Organic Content ◽  
Long Term Effects ◽  
Nereis Virens ◽  
Community Needs ◽  
General Decline ◽  
The Mean ◽  
Repeat Sampling

The Solent European Marine Sites contain many tiers of habitat and species conservation, but also high levels of bait collection. Effective management strategies must be founded on up-to-date and locally based information from relevant studies of the impacts; these have been lacking for the collection of Nereis virens, a key bait species. The impacts on macrofauna were assessed through two approaches; (a) undug and dug sites in the Solent were compared over two years of repeat sampling; and (b) monitoring the long-term effects of simulated bait collection at an undug site through five years of yearly sampling. Dug sites had significantly higher densities of N. virens, but the mean weight was found to be significantly lower than those collected from the undug sites, but percentage maturity was not different. Organic content and sediment particle sizes differed between sites, and only the presence of gravel had a significant positive correlation with density. No clear patterns of other macrofauna species present were evident, although there was a significantly lower density of the terebellid polychaete Neoamphitrite figulus at the dug sites. Simulated bait collection did not alter overall macrofauna diversity, but certain species were affected. Abundance of N. figulus and the commensal Harmothoë glabra remained consistently lower in the dug area, whilst Cerastoderma edule numbers were reduced initially, but recovered. Numbers of Nephtys hombergii declined in both areas, but at a significantly greater rate in the dug area. A general decline in the abundance of many species, irrespective of digging, occurred over the period. The importance of these changes in Nereis virens populations and in the macrofauna community needs to be investigated prior to any management decisions on collection.

A Survey of Macro Damages from Non-Communicable Chronic Diseases: Another Challenge for Global Governance

2011 ◽  
Vol 11 (1) ◽  
pp. 1850220 ◽  
Author(s):  
David A. Mayer-Foulkes
Keyword(s):  
Risk Factors ◽  
Economic Growth ◽  
Chronic Diseases ◽  
Global Governance ◽  
Negative Impact ◽  
Nutrition Transition ◽  
Adult Mortality ◽  
World Health ◽  
Preventive Action

Non-communicable chronic diseases (NCDs) are currently the largest global cause of adult mortality, one of the principal burdens of disease in developed and underdeveloped countries. Their main causes are well known, tobacco use, unhealthy diet, physical inactivity and the harmful use of alcohol. The prevalence of these risk factors is directly related to the activities of transnational corporations (TNCs). For example, just the TNC budgets dedicated to advertising risky consumption are larger than the budget of the World Health Organization. A literature survey shows that NCDs have important long-term macroeconomic impacts, whose detailed evaluation has only just begun. The sheer burden on the working and aged population implies strong impacts on labor, saving and investment, as well as increased human capital depreciation. These will all impact long-term economic growth. It is a research priority to quantify these impacts. However, in the context of globalization, NCD is developing faster than its rigorous analysis. Research results show that what is needed is preventive action. This requires a global institutional framework capable of controlling NCD risk factors, which can also promote health and economic growth in general. Developing legal mechanisms to slow the negative impact of the deficient nutrition transition would be a step in that direction. Global markets need to be balanced with global governance holding TNCs responsible for their impact, promoting cooperative solutions when available, and taxing them so that they carry their fair share of social weight.

scholarly journals Effect of long-term caffeine administration to mice on in vitro fertilization and embryo development using oocytes

2013 ◽  
Vol 12 (4) ◽  
pp. 167-171 ◽  
Author(s):  
Hidemi Yokota ◽  
Yoshimasa Yokota ◽  
Mikako Yokota ◽  
Yasuyuki Araki ◽  
Yasuhisa Araki
Keyword(s):  
In Vitro Fertilization ◽  
Embryo Development ◽  
Vitro Fertilization

scholarly journals As the Wind Blows: The Effects of Long-Term Exposure to Air Pollution on Mortality

2019 ◽  
Vol 18 (4) ◽  
pp. 1886-1927 ◽  
Author(s):  
Michael L Anderson
Keyword(s):  
Air Pollution ◽  
Los Angeles ◽  
Infant Health ◽  
Short Form ◽  
Adult Mortality ◽  
Significant Loss ◽  
Adult Health ◽  
Life Years ◽  
The Impact

Abstract There is strong evidence that short-run fluctuations in air pollution negatively impact infant health and contemporaneous adult health, but there is less evidence on the causal link between long-term exposure to air pollution and increased adult mortality. This project estimates the impact of long-term exposure to air pollution on mortality by leveraging quasi-random variation in pollution levels generated by wind patterns near major highways. I combine geocoded data on the residence of every decedent in Los Angeles over three years, high-frequency wind data, and Census short form data. Using these data, I estimate the effect of downwind exposure to highway-generated pollutants on the age-specific mortality rate by using orientation to the nearest major highway as an instrument for pollution exposure. I find that doubling the percentage of time spent downwind of a highway increases mortality among individuals 75 or older by 3.8%–6.5%. These estimates are robust and imply significant loss of life years.

scholarly journals Will prenatal exposure to SARS-CoV-2 define a birth cohort with accelerated aging in the century ahead?

2020 ◽  
pp. 1-5
Author(s):  
Molly Crimmins Easterlin ◽  
Eileen M. Crimmins ◽  
Caleb E. Finch
Keyword(s):  
Cohort Studies ◽  
Birth Cohort ◽  
Influenza Pandemic ◽  
Accelerated Aging ◽  
Adult Mortality ◽  
In Utero ◽  
Respiratory Syndrome Virus ◽  
Maternal Infection ◽  
1918 Influenza

Abstract The 1918 Influenza pandemic had long-term impacts on the cohort exposed in utero which experienced earlier adult mortality, and more diabetes, ischemic heart disease, and depression after age 50. It is possible that the Coronavirus Disease 2019 (COVID-19) pandemic will also have long-term impacts on the cohort that was in utero during the pandemic, from exposure to maternal infection and/or the stress of the pandemic environment. We discuss how COVID-19 disease during pregnancy may affect fetal and postnatal development with adverse impacts on health and aging. Severe maternal infections are associated with an exaggerated inflammatory response, thromboembolic events, and placental vascular malperfusion. We also discuss how in utero exposure to the stress of the pandemic, without maternal infection, may impact health and aging. Several recently initiated birth cohort studies are tracking neonatal health following in utero severe acute respiratory syndrome virus 2 (SARS-CoV-2) exposure. We suggest these cohort studies develop plans for longer-term observations of physical, behavioral, and cognitive functions that are markers for accelerated aging, as well as methods to disentangle the effects of maternal infection from stresses of the pandemic environment. In utero exposure to COVID-19 disease could cause developmental difficulties and accelerated aging in the century ahead. This brief review summarizes elements of the developmental origins of health, disease, and ageing and discusses how the COVID-19 pandemic might exacerbate such effects. We conclude with a call for research on the long-term consequences of in utero exposure to maternal infection with COVID-19 and stresses of the pandemic environment.

Sign in / Sign up

Export Citation Format

Share Document