Sentences with phrase «reproductive rate»

«Its strategy for survival is based on a high reproductive rate, so [the Saiga] produce triplets and have the highest fetal biomass of any mammal.

Rising temperatures due to global warming have boosted the beetles» numbers by increasing their reproductive rate and reducing their winter die - off.

Though wild dogs can often recover faster from population decreases due to their high reproductive rate, the researchers concluded that such practices place added pressure on species that are already suffering from habitat loss and restricted ranges and require further action to monitor and minimize.

The western harvest mouse has a high potential reproductive rate.

In another contrast with other canids, the reproductive rate was lower for captive - born island foxes, the opposite of what is usually observed in other canid species.

Actually, there are scientists who have presented studies showing that TNR decreases colony size — i.e., showing that in - migration does not make up for the reduced reproductive rate.

The 10, 20, or even 100 ppm colloidal silvers aren't concentrated enough to kill billions of virus cells quickly enough to overpower the reproductive rate of the virus... so you don't get the results and it seems like the silver isn't working.

Their short life span and fast reproductive rate, makes it possible to investigate biological processes in many subjects, at all stages of the life cycle.

As the authors also observed in previous works, some aphids showed different chromosome numbers also comparing cells belonging to a same individual «forgetting» that chromosome instability within individuals should be typical of malignant cells and not of healthy insects showing a high reproductive rate.

When shielded from blue light, however, the bugs» reproductive rate dropped by more than 90 %, the team reports in tomorrow's issue of Science.

According to Lee, elephants exhibit the classical mammalian pattern of a decline in reproductive rate after age 49, followed by up to sixteen years of post-reproductive survival.

These factors, along with an inherently slow reproductive rate, continue to threaten the remaining Hawaiian monk seal population.

«The reproductive rate, at least in Sierra Leone and Liberia, was higher at the beginning of the epidemic.

The authors have also estimated the so - called reproductive rate of the virus in each country, which represents the average number of people that each infected person in turn infects.

Fisheries quotas, even though they were responsibly set and followed by fishers, decreased the reproductive rate.

In other words, to acheive such a reproductive rate, a woman would have to have a child every 3.3 years every year from 15 — 45.

Most social conservatives know that the main determinant of reproductive rates in America isn't patriotism but religion.

And with one of the highest reproductive rates in the animal kingdom, this isn't a great leap of logic.

Hopefully, Vasalgel placement can be an option for other captive colonies, including zoos, that want to manage reproductive rates while allowing for social housing.»

Bat populations are generally susceptible to decline because of low reproductive rates, and many species congregate at a limited number of locations during critical stages of their natural history cycle (i.e. hibernacula and maternity colonies).

Mountain lions occur at far lower densities than deer, and so any loss of their prey can have disporportionate impacts on their reproductive rates and overall abundance.»

You see the effect of this in reproductive rates, with the month of June showing the highest rate of conception.

Worse yet, smaller females are less fertile than large ones, meaning the few remaining females have suboptimal reproductive rates.

«Daughters of long - lived mothers lived longer themselves and had higher reproductive rates.»

For long - lived species such as humans, chimpanzees, whales and some birds, longer survival is associated with higher reproductive rates and a loss in fertility only at an extremely old age.

«Not acting is not an option because the life histories of these flying, nocturnal mammals — characterized by long generation times and low reproductive rates — mean that population recovery is unlikely for decades or even centuries, if at all,» said McCracken.

As a first step, the report recommends «building affordable surveillance systems» to detect population changes, including reproductive rates, which can be a simple indicator of a species» health.

Given these high reproductive rates, it stands to reason that, in only a few years, carefully planned and implemented sterilization programs could produce a dramatic reduction in the number of unwanted companion animals born.

[43] Insufficient nourishment leads to lower reproductive rates in adult females and lower survival rates in cubs and juvenile bears, in addition to poorer body condition in bears of all ages.

Low reproductive rates: Whales have naturally low reproductive rates, making many species extremely vulnerable to increasing pressure from whaling.

The shift in food availability due to climate fluctuations has already hurt the reproductive rates of the endangered North Atlantic right whale.

Novelist Michael Crichton, in State of Fear, ends with an appendix comparing the theory of global warming to the theory of eugenics — the belief, prominently promoted by Nazis, that the gene pool of the human species was degenerating due to higher reproductive rates of «inferior» people.

A cascade of impacts beginning with reduced sea ice will be manifested in reduced adipose stores leading to lowered reproductive rates because females will have less fat to invest in cubs during the winter fast.

Studies after the Exxon Valdez spill in 1989 found that oil ingested by marine life accumulates in tissues, lowering reproductive rates and increasing disease and mortality rates.

This stabilization was due to: 1) Social effects of globalization that reduced reproductive rates below replacement levels, 2) Several genetic engineering disasters between 2020 and 2035 that killed tens of millions of people, 3) A nuclear exchange in the MidEast in 2021 that lead to a mini - «nuclear winter,» cutting average temperatures by five degrees for a year, and 4) A punitive tax on non-renewable carbon - based energy quadrupled costs and led to more efficient use of energy resources.

Not exact matches

For example, countries in the Caribbean currently own the highest abortion rates (65 per 1,000 women of reproductive age).

Proponents for an individual's reproductive rights support data suggesting comprehensive sex education and birth control reduce abortion rates when young people have access to them.

The lowest abortion rates in the world - less than 10 per 1,000 women of reproductive age - are in Europe, where abortion is legal and available

Our impressive fertility rates are due to our commitment to cutting edge reproductive technology, which has made us one of the top fertility clinics in the nation.

She visits OBGYN, perinatal, urology, family practice and internal medicine offices to educate them on The Fertility Center of Las Vegas by providing information on the practice, advances in reproductive endocrinology and infertility, new clinical trial research, success rates and other important information.

The U.S. has considered many factors, such as advanced maternal age, more reproductive technology, and higher rates of premature births for its high mortality rate, but the rate is simply much too high.

Each year, reproductive endocrinologists are required to report in vitro fertilization (IVF) delivery rates to both the CDC and SART, the main organization of professionals dedicated to the practice of assisted reproductive technologies in the United States.

«We know there's a high rate of [problems] but it's not known why,» said Dr. Richard J. Paulson, chief of reproductive endocrinology and infertility at the University of Southern California Keck School of Medicine in Los Angeles.

This rise and variation in rates is due to the use of reproductive techniques, and is partly accounted for by more births to older women and more multiple births in women from more affluent backgrounds (Smith 2014).

More recently, rates of higher order births (three or more infants) have declined as changes in assisted reproductive techniques (ART) to reduce multiple pregnancies have been implemented (Smith 2014; Umstad 2013).

The twin birth rate in the U.S. has surged over the last 30 years, mostly because of reproductive technologies including in vitro fertilization.

This follows a review and meta - analysis published today (Wednesday) in Human Reproduction one of the world's leading reproductive medicine journals, that shows a strong link between low vitamin D concentrations in women and lower live birth rates after ART compared to women who have the right amount of vitamin D in their bodies.

Because the beetles developed at more or less constant rates relative to temperature, Logan was able to describe the relationship between reproductive success and temperature as a series of mathematical formulas.

But there was no difference in growth rate, shell length, or time to reproductive maturity between asexual females with three genomic copies and those with four, ruling out that theory.

«In our study, transgender youth decided to pursue fertility preservation at much lower rates than we would have expected from research on reproductive desires of transgender adults, which suggests that about half want biological children and over a third would have considered preserving their fertility if techniques had been available and offered to them,» said lead author Diane Chen, PhD, a pediatric psychologist with the Gender & Sex Development Program at Lurie Children's and in the Department of Psychiatry and Behavioral Sciences at Northwestern University Feinberg School of Medicine.