Sentences with phrase «as sex ratios»

Descriptive analyses looked at sex composition preferences of men and women, as well as the sex ratio at last birth.

Not exact matches

And the overwhelming ratio to «lust» books vs. «gift of sex» books is because dealing with lust is much more prevalent in society than enjoying the gift of sex as God intended.

Besides skewing the sex ratio, the hormone could be disrupting the animals» reproduction, a concern because American crocodiles are already listed as vulnerable, and this part of Costa Rica is a stronghold for the species.

«Sexual dimorphism is very common, as is sex ratio variation.

As a result, the species can shape the ecosystem differently depending on the sex ratio of the population,» Palkovacs said.

In that year China is expected to overtake Japan as the world's most aging society, and the number of working - age men without female counterparts will peak at 29 million (and that's assuming that the sex ratio at birth begins to drop tomorrow).

For example, according to the Shettles method, having sex as close to the moment of ovulation as possible is supposed to skew the ratio towards boys: the Y chromosome is smaller, so the reasoning is that Y - carrying sperm swim faster and are first to reach the egg.

By observing groups of flour beetles in the laboratory, Melbourne and Alan Hastings, a mathematical ecologist at the University of California, Davis, demonstrated that random variations in sex ratios and physical differences, such as body size, greatly contribute to the overall threat of extinction.

Among his recent findings: When the sex ratio is low (too many women), women are more slender; when women are in short supply, as was the case in the United States in the 1950s, women are more curvaceous, perhaps because they are trying to look the part of traditional wife and mother.

They have also discovered that the animals are contaminated with a synthetic hormone known as 17α - methyltestosterone, or MT, which may be shifting the sex ratio toward males.

Barber's studies, which often look at patterns in 40 countries or more, have shown the power of the sex ratio in predicting such things as the rate of nonmarital births, the practice of polygyny, and even the likelihood that men will grow facial hair.

Sex ratios in sub-Saharan Africa are a bit more balanced, and the sex gaps in education, work outside the home and child mortality are not as larSex ratios in sub-Saharan Africa are a bit more balanced, and the sex gaps in education, work outside the home and child mortality are not as larsex gaps in education, work outside the home and child mortality are not as large.

Anthropological studies have suggested that there are consistent sex differences in the ratio of the lengths of the index and ring fingers (expressed as 2D: 4D), with men showing a lower average 2D: 4D than women.

They stress that inclusive fitness ideas have helped yield insights into many biological phenomena, such as why social insects have skewed sex ratios.

If there are too many males or females in a given year, however, an individual will often spawn as a member of the rarer sex, keeping the sex ratio balanced.

While working as a social demographer at the Chinese Academy of Social Sciences in 2008, Song became interested in the sex ratio decline that came out of the devastating Great Chinese Famine in the mid-20th century.

He saw the famine as a natural experiment for the adaptive sex ratio adjustment hypothesis.

It has not promoted social counterstrategies such as female gregariousness, pair living, or changes in group size and sex ratio, but is successfully prevented by female sexual promiscuity, a paternity dilution strategy.

This has been shown to have a small but significant impact on population size by increasing the number of breeding birds, as well as influencing the sex ratio.

Professor Suckling added: «The sex differences in the limbic system include areas often implicated in psychiatric conditions with biased sex ratios such as autism, schizophrenia, and depression.

Tu and colleagues compared these serologic biomarkers to traditional risk factors (age, sex, smoking, family history, symptoms) in a large Chinese population - based screening analysis.70 Pepsinogen I and II, as well as the pepsinogen I / II ratio, were assessed in combination with a gastrin subset gastrin - 17 and H pylori antibody (HP IgG).

What is known from global studies is that exposure to biologically active compounds, even at ng / L concentrations, can impact endocrine systems in nature and manifest as negative impacts like altered gene regulation, the presence of mixed reproductive tissues (intersex) and skewed sex ratios.

This is also important as previous evidence indicates that different neonicotinoids may exert opposing effects on bumblebee queen production and sex ratios of colonies.

Disproportionate mortality of males, presumably an important cause of the change in sex ratio of the snow leopard population in Tost, is reported in several carnivores as resulting from human - induced factors such as poaching and retaliatory killing, including Amur tigers in southeast Russia [32], leopards in South Africa [34], and cougars in the Pacific Northwest [33], although there are exceptions (e.g. tiger population in Panna, Central India, that had turned male - biased prior to extinction due to poaching; [36], [37]-RRB-.

The change in sex ratio of snow leopards in Tost was accompanied by a potential decline in the number of cubs per female over the study period as the female population increased.

PCBs are related to a class of compounds known as dioxins, specifically 2,3,7,8 - TCDD (tetrachloro - dibenzodioxin), which has been implicated as a cause of altered sex ratio, especially in relation to paternal exposures.

The web - based calculator computed gains in total cardiovascular disease - free life expectancy using age, sex, smoking, blood pressure, hypertension, lipids, diabetes, glucose, body mass index, waist - to - hip ratio, and creatinine as variables.

Having attended a number of singles events, Joanna Fanning, a banking PA from Friern Barnet, is pleasantly surprised by the ratio of the sexes: «There's practically the same number of men as there are women here,» she says.

CANADIAN PRESS — July 17 — May to December romances, such as the one between Ashton Kutcher and Demi Moore, could be the answer to the growing sex ratio imbalance in Canada.

In any case, there are many legislation - dependent factors (Qualitative such as education, occupation security, sex, etc, payment history; or Quantitative such as age, liquidity and leverage ratios, etc).

The female - biased sex ratio of some western gull colonies may have been the result of pollution by pesticides that acted like estrogen and made some male embryos develop as females.

In shows selected by artists where there is no consciousness of sex, as in the American Abstract Artist shows which began in the late 1930s or the Artists Annuals of the early 1950s, the ratio seemed to be between one third and one quarter women.

The policy (which is one of population control, not birth control) has had dreadful costs, including widespread female infanticide, a lopsided sex ratio and horrors such as mass sterilisation and forced abortions.

Gather the required data to draft the health index of the region such as birth rate, death rate, sex ratio, common diseases or disorders, minimum nutrition intake, per capita income etc..

SMRs were calculated as follows: standard death rates by five year age group were obtained using ABS Australian death data for 2006 and the ABS estimated resident Australian population for the Census year 2006 [14]; these rates were applied to the ABS estimated Aboriginal and Torres Strait Islander population NSW 2007 [2] by sex and five year age group and summed to obtain the expected number of Aboriginal and Torres Strait Islander deaths; finally, the ratios of observed number of deaths for the three groups «as reported», the algorithm and «at least one report» were compared to the expected number of deaths to give SMRs for the three groups.

As I have posted over and over again in this blog, evolutionary psychologists expect that only some men pursue short - term mating strategies (e.g., given their own mate value, physical attractiveness, attachment experiences, local pathogen levels, local sex ratios, and so forth; see Gangestad & Simpson, 2000).