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Results 251 - 300 of 691
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Aasen John - - 2005
The Protoceratium reticulatum cell density at Flodevigen reached a maximum of 2200 cells/L on 16 May 2001. The levels of yessotoxins (YTXs) in blue mussels (Mytilus edulis) at the same site increased sharply by 14 May and peaked on 28 May, after which they steadily declined. No other algal species ...
Norberg Karen - - 2004
If two-parent care has different consequences for the reproductive success of sons and daughters, then natural selection may favour adjustment of the sex ratio at birth according to circumstances that forecast later family structure. In humans, this partnership-status hypothesis predicts fewer sons among extra-pair conceptions, but the rival 'attractiveness' hypothesis ...
Freeman Natalie C G - - 2004
An environmental measurement and correlation study of infant and toddler exposure to pesticides was carried out in a colonia south of the city of Laredo, Texas. As part of the study, homes were visited during the late spring or summer, and during the winter of 2000-2001. At each visit, families ...
Carrión-Baralt Jose R - - 2004
A substantial body of evidence from dozens of studies in many different countries suggests an excess number of individuals with schizophrenia are born in winter months. The presence of a seasonality effect in regions with year-round warm climate, however, has rarely been examined. The major purpose of this project was ...
Chowers Yehuda - - 2004
OBJECTIVE: The main objective is to study whether the month of birth is associated with the development of Crohn's disease (CD) in the Israeli Jewish population. BACKGROUND: It was suggested that perinatal exposure to infectious agents may have a role in the pathogenesis of CD. Due to the seasonal nature ...
Page Richard L - - 2004
OBJECTIVES: We postulated that the pattern of death would be nonrandom with respect to temporal variables. BACKGROUND: Previous studies have demonstrated increased sudden death is associated with periods of relative stress, and overall mortality is associated with temporal variables. METHODS: In the Antiarrhythmics Versus Implantable Defibrillators (AVID) registry, vital status ...
Messias Erick - - 2004
BACKGROUND: In some reports, summer birth has been associated with deficit schizophrenia. Deficit schizophrenia and nondeficit schizophrenia also differ in several other ways. OBJECTIVE: To conduct a combined analysis of the published and unpublished data sets from the northern hemisphere that relate deficit and nondeficit schizophrenia to month of birth. ...
Ahlgren Cecilia - - 2005
In the present study, we found no association between multiple sclerosis (MS; definite and probable, n = 211) and birth order (p = 0.1411). The observed number of first-born patients did not differ significantly from the expected number (p = 0.0871). While there was a significantly high birth order (n ...
Ngom Pa T - - 2004
BACKGROUND: In rural Gambians, the season of birth strongly predicts adult mortality. Those born during the harvest season have longer life spans than do those born during the hungry season, and the deaths associated with infectious diseases suggest permanent early-life influences on immunity. Thymic measurements showed significantly smaller thymuses in ...
Tsutsui Toshihiko - - 2004
The breeding season was investigated in 174 female cats that were acclimated under a natural photoperiod, and determined the interval between birth and initial estrus (puberty) was determined in 125 cats. Although the breeding season differed noticeably among individual animals, the mean was 180.4 +/- 3.0 (SE) days between the ...
Holm B - - 2004
The aim of this study was to investigate whether selection for number of live born piglets has led to prolonged parturition and increased requirement for birth assistance, resulting in increased numbers of stillborn piglets. Data were collected from 6,718 primiparous Norwegian Landrace sows farrowing between 2001 and 2003. The need ...
Lapina Kateryna - - 2004
Fine aerosol (PM2.5) measurements obtained from the first year of operation of the nationwide network of PM2.5 monitors were studied with the factor analysis technique of positive matrix factorization (PMF). PM2.5 mass concentration data were extracted from the Atmospheric Information Retrieval System (AIRS) database of the U.S. Environmental Protection Agency ...
Brown-Douglas C G CG Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, Dunedin, New - - 2004
There is little information on age, weight and time of year of puberty in Thoroughbred horses, and the interpretation of such data is difficult due to the wide variety of descriptions of the onset of puberty. To examine the age, bodyweight and date of onset of puberty in Thoroughbreds born ...
Borchert Daniel M - - 2004
A series of studies were conducted to examine the residual activity and toxicity of the ecdysone agonists tebufenozide and methoxyfenozide to codling moth, Cydia pomonella (L.), and oriental fruit moth, Grapholita molesta (Busck), in North Carolina apple systems. Methoxyfenozide exhibited greater activity than tebufenozide against codling moth eggs in dose-response ...
Lupton C J - - 2004
An experiment was designed to evaluate the effects of five sire breeds (Dorset, Finnsheep, Romanov, Texel, and Montadale), two dam breeds (Composite III [CIII] and northwestern whiteface [WF]), and three shearing seasons (December, February, and April, corresponding to August, October, and December breeding seasons) and their interactions on wool and ...
Raj Shammi - - 2005
A study on the relationship between latex yield and antecedent environmental data was undertaken for five clones (RRII203, RRII118, RRIM600, RRII105 and GT1) of Hevea brasiliensis (rubber) in Agartala, northeast India, a region in which rubber is not traditionally cultivated. The explained variance for the regression equations based on parameters ...
Mishra M K - - 2004
To explore the role of TH in the control of seasonality [i.e., photoperiodic testicular growth, photorefractoriness, and postnuptial (prebasic) molt] in American tree sparrows (Spizella arborea), we performed experiments in which THX males were simultaneously photostimulated and given TH replacement therapy. In the first experiment, equimolar concentrations (1X = 1.3 ...
Kirby M F - - 2004
The determination of hepatic ethoxyresorufin O-deethylase (EROD) has been used to assess the induction of the mixed function oxygenase system (MFO) of flounder (Platichthys flesus) in UK estuaries. Induction of the MFO system denotes possible exposure to certain organic contaminants (e.g. polycyclic aromatic hydrocarbons, polychlorinated biphenyls) and its measure has ...
Tabor Kimberly L - - 2004
Studies of carrion-insect succession on domestic pig, Sus scrofa L., were conducted in the spring and summer of 2001 and 2002 in Blacksburg, VA, to identify and analyze the successional patterns of the taxa of forensic importance in southwest Virginia. Forty-seven insect taxa were collected in the spring. These were ...
Greksa Lawrence P - - 2004
The Old Order Amish are a healthy and well-nourished natural fertility population, so that the timing of births is not influenced by behaviours to limit family size, undernutrition or disease. The present study examines the monthly distribution of 8160 births occurring between 1920 and 1991 in the Geauga Settlement in ...
Benderlioglu Zeynep - - 2004
Fluctuating asymmetry (FA) refers to random, small deviations from perfect bilateral symmetry in morphological traits. These minor deviations from the ideal phenotype reflect environmental and genetic perturbations experienced during ontogeny. FA has been associated with negative health outcomes and many developmental disorders in humans. The prevalence of developmental disorders and ...
Daniel Milan - - 2004
In 1993 the incidence of tick-borne encephalitis (TBE) showed a sharp rise in Central Europe and has remained high since--with some slight fluctuation. This increase is clearly evident in the Czech Republic and it could be roughly characterised as twofold in 1993-2001 in comparison with 1984-1992 (5,240:2,441 human cases). As ...
Ciprandi Giorgio - - 2004
BACKGROUND: Nasal obstruction is a typical symptom of allergic rhinitis. Allergic rhinitis is characterized by a Th2-dependent inflammation. The aim of this study was to evaluate the possible relationships between allergic inflammation, including inflammatory cells and cytokine pattern, and nasal airflow in patients with nasal obstruction due to seasonal allergic ...
Ogawa G - - 2004
Several reports have described the seasonal variation of multiple sclerosis (MS) attacks in the European countries and in the US. Some have insisted that attacks occurred more frequently in winter or spring. We investigated the possibility of a seasonal variation in the frequency of MS attacks among patients in Japan. ...
Wei Miao - - 2004
Based on the variation of site 34, 46, 241, 305 and 322 in the 18S-ITS1 rDNA sequence, 19 Carchesium polypinum populations collected from eight provinces of China were separated into northern and southern population along the delineation between the Yangtze River and the Pearl River. This geographic distribution pattern of ...
Huber S - - 2004
BACKGROUND: At high latitudes the external environment varies with season, and therefore the season of birth may contribute to the developmental processes during the perinatal period. METHODS: We investigated the association between birth season and measures of reproductive performance (offspring count, percentage childless individuals) in a contemporary sample of women ...
Abel Ernest L - - 2004
We reexamined the relationship between month and season of birth and handedness in male professional baseball players listed in Lahman's Baseball Archive Vol. 4.5 database. The sample of 8,016 individuals (left-handed = 1,658; right-handed = 6,358) played major league baseball between 1900-2001. A slightly higher, but statistically significant, percentage of ...
Moore Sophie E - - 2004
BACKGROUND: Analysis of data from rural Gambia has previously shown that being born during the annual hungry season strongly influences susceptibility to mortality from infectious disease in young adulthood, possibly through an influence on immune function. In rural Bangladesh pregnancies are exposed to similar seasonality. The current paper uses data ...
Mohamed Noha Saleh - - 2004
The aim of this study is to analyze levels, trend and seasonal patterns of under-5 mortality in Alexandria. In order to fulfill this aim, a retrospective study is conducted to collect recorded data about under-5 deaths and live births from 1996 to 2001 from Health Information Center and CAPMAS in ...
King Rosalind Berkowitz - - 2004
Researchers in psychology have focused a great deal of attention on the potential greater predisposition to achievement among first-born children relative to their siblings. Focusing on the United States as an example, a time series of the first birth ratio is used to show how the changing prevalence of first ...
Puc MaƂgorzata - - 2004
The aim of the study was to analyse the ragweed (Ambrosia) pollination in Szczecin (western Poland) in the years 2000-2002. Measurements were performed by the volumetric and gravimetric method. Pollen seasons were defined as the periods of 90 % of the total catch. Ragweed pollen is known as a very ...
James William H - - 2004
It has been established that the probability that a man is homosexual is positively related to his number of older brothers, but not older sisters when the brothers are accounted for. This is known as the 'fraternal birth order' effect. In the past, efforts have been made to explain this ...
Gallagher Shaun - - 2004
This paper argues that Frith's (1992) account of the positive symptoms of schizophrenia in terms of a disruption of metarepresentational self-monitoring is inadequate in several specific ways. More generally, this paper argues against top-down explanations for the loss of the sense of agency in such symptoms. In addition, even if ...
Kicha Alla A - - 2003
Seasonal variations in the levels of polar steroids including polyhydroxylated steroids and related glycosides in digestive organs of the starfish Patiria (=Asterina) pectinifera have been studied. The concentration of polar steroids is related to the annual reproductive cycle of the starfish and periods of active feeding. Two peaks in concentrations ...
Heideman Paul D - - 2003
Differences among species and among years in reproductive seasonality (the tendency for clusters of events to fall at approximately the same point in each year) and synchrony (amount of clustering of events within a year) have been intensively studied in bats, but are difficult to assess. Here, we use randomization ...
Karley A J - - 2003
Populations of many phloem-feeding aphid species in temperate regions increase exponentially in early summer and then 'disappear', usually over a time-scale of a few days, in July. To understand these dynamics, empirical investigation of the causes and modelling of the processes underlying population change are required. Numbers of the aphids ...
Melnikov Vladimir N - - 2003
OBJECTIVES: To assess associations between mean age at death from cardiovascular disease (myocardial infarction, acute heart failure, ischemic heart disease and stroke) and sex, education, socio-professional status, marital status, region of residence at birth, month and season of birth and of death in dependence of climatic conditions. DESIGN: A retrospective ...
Collinson A C - - 2003
In rural Gambia, birth season predicts infection-related adult mortality. Seasonal factors in early life may programme the immune system, possibly via an effect on thymic development. This study tested whether thymus size in rural Gambian infants is affected by birth season, defined as January-June (harvest, few infections) versus July-December (hungry, ...
Dauvilliers Yves - - 2003
STUDY OBJECTIVES: A loss of hypocretin neurons has been observed in human narcolepsy; however, the cause of this disorder is still unknown. While family history and genetic factors are important individual risk factors for narcolepsy, environmental factors also contribute to the pathogenesis of the disease. The aim of the study ...
Jeppesen D L DL Department of Paediatrics, Hvidovre Hospital, University of Copenhagen, Denmark. - - 2003
The report on the influence of seasonal factors on thymic size in early life describes a pattern of ultrasonographically measured thymic growth in Gambian infants including the finding of a smaller thymus in the hungry season. These factors raise a number of important questions: Is the size of the thymus ...
Bersani G - - 2003
OBJECTIVE: Obstetric complications may be an etiologically important factor in the development of schizophrenia. The aim of this study was to evaluate whether the risk for developing schizophrenia in adult life is increased in individuals with more severe obstetric complications at birth. METHODS: To this end, mothers were interviewed to ...
Danubio Maria Enrica - - 2003
Reconstruction of human ecosystems and their stability over time provides knowledge of the processes of adaptability developed by isolated communities. Seasonality of vital events is a good indicator of the effects of different 'traditional' lifestyles, which in turn depend on the ecological context in which a population developed specific subsistence ...
Fleitmann Dominik - - 2003
A high-resolution oxygen-isotope record from a thorium-uranium-dated stalagmite from southern Oman reflects variations in the amount of monsoon precipitation for the periods from 10.3 to 2.7 and 1.4 to 0.4 thousand years before the present (ky B.P.). Between 10.3 and 8 ky B.P., decadal to centennial variations in monsoon precipitation ...
Nakagawa Naofumi - - 2003
Based on long-term, although intermittent, observations (2 years 4 months of 14 years), we present data on birth seasonality, age at first birth, interbirth intervals, mortality rates, age at first emigration, and population change of a wild population of West African patas monkeys ( Etythrocebus patas patas) in northern Cameroon. ...
Bogaert Anthony F - - 2003
A late fraternal birth order has been demonstrated numerous times in homosexual men. Body size has been less studied with regard to the development of sexual orientation and has demonstrated contradictory results. In this research, the relations among fraternal birth order, body size, and sexual orientation were examined in a ...
Mäki Pirjo - - 2003
OBJECTIVE: Problems in the early mother-infant relation pose a hypothetical risk factor of schizophrenia. We studied the association between very early separation and later development of schizophrenia or other psychoses in a unique data set. METHOD: The index cohort consisted of 3020 subjects born in 1945-1965 in Finland who were ...
Fooden Jack - - 2003
Japanese macaques, Macaca fuscata, exhibit an annual reproductive cycle that apparently is maintained intrinsically. Translocation of nine troops to new latitudes within the northern hemisphere has had minimal effect on the timing of birth seasonality in these troops; translocation of one troop to the southern hemisphere has resulted in a ...
Eastwood S L - - 2003
The neuropathological features of schizophrenia are suggestive of a developmentally induced impairment of synaptic connectivity. Semaphorin 3A (sema3A) might contribute to this process because it is a secreted chemorepellant which regulates axonal guidance. We have investigated sema3A in the cerebellum (an area in which expression persists in adulthood), and measured ...
Merchant J C - - 2003
A survey of rabbit populations in the southern tablelands of New South Wales, Australia, was carried out to establish the pattern of occurrence of myxomatosis in preparation for a deliberate release of myxoma virus. Myxomatosis was first detected in December and cases were found on most sites through to May. ...
Davies Geoffrey - - 2003
Based on the epidemiological finding that individuals with schizophrenia tend to be born in winter/spring when compared to the general population, we examined (1) the strength and timing of this effect in Northern Hemisphere sites, and (2) the correlation between the season of birth effect size and latitude. Studies were ...
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