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Mating in Medical News

Meat for sex in wild chimpanzees

... ONE April 8, 2009. How females choose their mating partners and why males hunt and share meat with ... whereby males and females exchange meat for mating access. However, there has been little evidence ... that sharing meat with females improves a males' mating success. Although males were more likely to share ...

Study garners unique mating photos of wild gorillas

... gorillas have been observed and photographed mating in such a manner. The photographs were part of ... been known to frequently employ ventro-ventral mating positions. On a few occasions, mountain gorillas ... Park Zoo. We cant say how common this manner of mating is, but it has never been observed with western ...

Zoologists: Lusty voles, mindless of danger, mate like rabbits

... interpret the results of new research on the mating habits and nervous systems of prairie voles. An ... instead ranging across other males turf and mating with other males females. Alexander Ophir, a ... repeated attacks but sometimes successfully mating with females. What we think is that animals that ...

January American Naturalist highlights

... of selection on floral traits that influence the mating system and contribute to reproductive isolation. ... models for the evolution of assortative mating under frequency-dependent disruptive selection ... resolution? In the genes eye view, female mating frequency is difficult to understand. A ...

Chemical come-on successfully lures lovesick lampreys to traps

... use to attract spawning females can lure them into traps and foil the mating process of the destructive invasive species, according to Michigan State ... baited with synthetic pheromone, fishery managers could prevent them from mating and reduce lamprey populations. The synthetic pheromone also could be used ...

Fish diet to avoid fights

... revealed fish use the threat of punishment to keep competitors in the mating game in line, have taken the work a step further to discover that ... we noticed that only the largest two individuals, a male and female, had mating rights within the group, explains Dr Marian Wong. All other group members ...

Mosquito mating mechanism could lead to new attack on dengue and yellow fever

... Cornell researchers have identified a mating mechanism that possibly could be adapted to prevent female mosquitoes from ... 63 proteins that male mosquitoes transfer to Aedes aegypti females during mating and are thought briefly to change the females' physiology and behavior, in ...

JCI table of contents: Nov. 8, 2007

... as Cre. The role of GPCRs in beta-cells in the pancreas was determined by mating ROSA26PTX mice with mice expressing Cre only in pancreatic beta cells. ... Taar1, and Par2 in regulating insulin release by pancreatic beta cells. By mating ROSA26PTX mice with other strains of mice expressing Cre in a tissue or ...

Discovery in amber reveals ancient biology of termites

... in amber. It was just published in Parasites and Vectors , a professional journal. This particular termite was probably flying around while mating in a wet, humid tropical forest in what is now Myanmar during the Early Cretaceous period the age of the dinosaurs. It may have been attacked by a ...

Fish in U.S. Rivers Tainted With Common Medications

... This study is part of a federal strategy to address the issue. Previous research has concluded that behavior vital for fish survival, such as mating and fighting, can be affected if too much antidepressant residue collects in their systems. While other studies have found pharmaceuticals and ...

This February Discovery en Espanol Delves Into The Subconscious World of Attraction in 'Science of Sex Appeal'

... are not ovulating, while women shoot back with copulins, which makes men find all of them sexy. The truly tantalizing mix and varied signals in the mating dance of life, as explored in SCIENCE OF SEX APPEAL, lifts the covers to reveal the astounding science behind what makes us click with one another. ...

New Study Data: JANUVIA™ (sitagliptin) Significantly Reduced Blood Sugar Levels and Was Not Associated with Hypoglycemia in Elderly Patients with Type 2 Diabetes

... for 4 weeks prior to mating, during mating, up to scheduled termination (approximately 8 weeks total) and females were treated 2 weeks prior to mating through gestation day 7. No adverse effect on fertility was observed at 125mg/kg (approximately 12 times human exposure at the MRHD of 100mg/day ...

Economic Update: You Should Invest (in Your Appearance)

... although most of us will never do the 'princess wave' wearing a tiara -- we are, nevertheless, competing for career opportunities, social status, and mating privileges, in a very youth-oriented, image-driven society. Fortunately for many of us, we've just entered an era where medical and surgical ...

LabBits: A media tip sheet from the MBL in Woods Hole

... stick our heads underwater, the right instruments can reveal a symphony of sound. The noisemakers range from the low-frequency bass tones of a fish mating ritual to the roar of a motorboat. The study of how underwater animals hear is a growing topic in marine science, especially with regards to naval ...

Hermaphrodites, predatory actions and fertility decline are among topics at behavior conference

... assistant professor ecology and evolutionary biology, Yale University, on "When Theory Meets Data: What We Don't Know About Sexual Selection and mating Systems," Nico Michiels, professor in zoology at the University Tuebingen, Germany, on "Hermaphrodites: Sexual Opportunists with a Long Term ...

Which came first, social dominance or big brains? Wasps may tell

... calyces did not differ between the males and females, specific subregions were larger in each sex. Males rely on vision when they leave the nest for mating opportunities, and the part of the calyx that receives visual input was larger. In contrast, most female interaction takes place on the nest, where ...

Transparent fish to make human biology clearer

... Drugs and genes could be tested in the living fish, with direct observation of results, White says. White created the transparent fish simply by mating two existing zebrafish breeds. Zebrafish have three pigments in their skinreflective, black, and yellow. White mated a breed that lacks reflective ...

Transparent Fish Gives New Window on Disease

... in a living organism. In normal zebrafish, embryos are transparent but adults become opaque. The new permanently transparent fish, created by mating two existing zebrafish breeds, is described in the Feb. 7 issue of Cell Stem Cell . Currently, researchers studying human diseases in animals ...

For the fruit fly, everything changes after sex

... behaviour of the fruit fly Drosophila melanogaster. Two years ago, the team was able to identify the fruitless gene as a key regulator of mating behaviour. For 20 years, scientists have been trying to identify another molecular switch which changes the behaviour of female insects after ...

GlaxoSmithKline Obtains Exclusive U.S. OTC Marketing Rights to MEVACOR(R) (lovastatin) from Merck & Co., Inc.

... 8/307 compared to 4/289 in the control group; affected rat fetuses/total: 6/324 compared to 2/308 in the control group). Female rats dosed before mating through gestation at 80 mg/kg/day also had fetuses with skeletal malformations (affected fetuses/total: 1/152 compared to 0/171 in the control ....

In birds, expecting to mate leads to higher fertilization rates

... mate with the same female compete to fertilize her eggs, paternity will favor the male that received a signal or conditioned stimulus before the mating session. Using quail, Matthews put the males into two chambers for thirty minutes; they repeated this for five days. One chamber was green and ...

NIH awards Phylonix phase II SBIR to develop zebrafish models for eye diseases

... for drug screening: they are small, inexpensive to maintain, and easily bred in large numbers. Zebrafish eggs are externally fertilized and a single mating produces 100-200 eggs. Single embryos can be maintained in fluid volumes as small as 100 microliters for the first six days of development and ...

Is there really a 'mommy' gene in women?

... away from motherhood will necessarily be bred out. In this way future generations of women will inherit a stronger genetic predisposition for mating and having children as a priority in their lives. Dr. Aarssen predicts that an increased desire for marriage and having children, in both men and ...

Not all risk is created equal

... mean they will take risks in all areas." The types of risks identified include competition with other individuals; competition with other groups; mating and allocating resources for mate attraction; environmental risks (chasing a bear or skydiving); and fertility risks. The study showed that our ...

Females avoid incest by causing male relatives to leave home

... because it is genetically hazardous. They can either do this by moving away from home or, like humans, by learning who their relatives are and not mating with them. Like most mammals though, male hyenas do not contribute to the rearing of their offspring, making it highly unlikely that females know ...

Another Sexual Attraction is Possible ...

... towards them, even on the darkest nights. Such mating recognition systems tend to be very specific, ... thought to play a major role in the evolution of mating barriers and in the formation of new species. ... used for meeting, they may not be used for mating per se. Performing crosses and backcrosses ...

Biochemical Chip Solves Cell-mating Puzzle

... the important role a certain protein plays in the mating habits of yeast cells. The finding could lead to ... when they want to merge, engaging in a type of mating behaviour. Human cells 'talk' to one another in a ... to understand this process." During the mating process, yeast cells use pheromones to catch the ...

The Chemistry Of Sexual Attraction Between Male And Female Elephants

... competitors and influences the female elephants mating interest. The researchers argue that ... "luteal" phase were examined, a mild mating interest was seen when there was more of plus ... the study further and possibly understand the mating behavior in other mammalian species. ...

Sex Played A Vital Role For Evolution Of Infectious Diseases

... Same-sex mating between two less harmful yeast strains might have ... of fungal samples, the researchers suggest that mating between two less harmful fungal strains of the same sex or mating type produced the more virulent form. That strain ...

An Enzyme That Turns a One –time Experience into a long-time Memor

... studied female mice and how they remembered their mating partner. They discovered that with only one ... exposed to her partner’s scent even a month after mating will continue her pregnancy. Investigators say ... female memorizes her partner’s scent during the mating process. Researchers say norepinephrine is a ...

Enzyme Associated With Memory

... studied female mice and how they remembered their mating partner. They discovered that with only one ... exposed to her partner’s scent even a month after mating will continue her pregnancy. Investigators say ... female memorizes her partner’s scent during the mating process. Researchers say norepinephrine is a ...

Enzyme Associated with Memory

... studied female mice and how they remembered their mating partner. They discovered that with only one ... exposed to her partner’s scent even a month after mating will continue her pregnancy. Investigators say ... female memorizes her partner’s scent during the mating process. Researchers say norepinephrine is a ...

Fishes Use Threat of Punishment in Mating Process

... that fishes use the threat of punishment to keep would-be jumpers in the mating queue firmly in line and the social order stable. Their discovery, ... this threshold, a challenge is on as the junior fish tries to jump the mating queue and the superior one responds by trying to drive it out of the ...

Research Suggests Mens Sexual Behavior Adapts to Perceived Threats

... with the idea of animals competing for mates before sex occurs, through mating displays such as bright feathers or butting antlers, we are finding more evidence that there is also competition after mating occurs, says author Todd K. Shackelford. An alternative way of ...

Top 10 Reasons Why People Are Obese

... during pregnancy. * Darwinian natural selection * Assortative mating Fat people mating with fat people begets fat offspring Dr. Robert Kushner, medical ...

Natural Selection in Butterflies

... that, thanks to Wolbachia, when males of H. bolina, commonly known as the Blue Moon or Great Eggfly butterfly, become a rare commodity, the number of mating sessions for both males and females jumps, possibly as an attempt to sustain the population despite the odds. Charlat added that the ...

Spouse may "drive You to Drink" but also can Protect You from Alcohol

... saw that the additional influence of the partner's behavior tended to reduce the likelihood of problem drinking. Grant says that although non-random mating means that a person with genetic risks for alcohol problems will tend to marry another with a propensity toward alcohol dependence, it appears that ...

When Smell Cells Fail They Call In Stem Cell Reserves

... damaged cells; rather, they allowed the previously known stem cells to do all the repair work. The ability to smell is crucial for eating, mating and survival, and its important that the olfactory system be fully operational all the time, explains Reed. The HBCs act as a fail-safe to ensure ...

Invasion of Cicada Hordes Feared in US Midwest

... are ringing across the Midwest over the possible invasion of cicadas. Well they dont bite or sting. But they can be quite a nuisance . For their mating calls that produce a din that can overpower ringing telephones, lawn mowers and power tools. Cicadas live only about 30 days as adults, and their ...
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(Date:11/6/2014)... occur because of metastasis, yet progress in preventing ... , "It,s been particularly challenging to design drugs ... fellow in systems biology at Harvard Medical School. ... after they,ve already metastasized." , Gujral and colleagues ... help researchers better understand how metastasis begins. Their ...
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(Date:11/4/2014)... PA) – Temple University School of Medicine announced ... winner, an initiative funded by the Bill & ... Professor of Obstetrics, Gynecology and Reproductive Sciences; and ... Temple University School of Medicine will pursue an ... "Maternal Blood Biomarkers to Assess Fetal Neurodevelopment.", Grand ...
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