Sure enough, they found that males with larger forehead patches than the year before also fathered more sons than they had done the previous year, whereas those with smaller forehead patches fathered more daughters.
The result was that the hungry birds were more likely to have sons, and the plump ones daughters.
They return home with a burning nationalism that propels people like the Sumers to beget even more sons.
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Indeed, in the best territories pairs will not have sons unless there are more than two helpers at the nest.
Jenny Sanford briefly looked at mounting a race in the Republican-leaning congressional district along the state's southern coast, but she decided against it, saying her job as a mother to the couple's four sons was more important.
The series my sons favored were milder, more immersive, with stories that reflected child-size dramas: tantrums, sharing, and fantasies of adventure in the larger world.
Not long ago, in the hope that our sons might become a little more Matsigenka, my husband and I gave them a new job: unloading the grocery bags from the car.
As the years have passed since I posted my first video, my husband and I have welcomed two more sons to our family and my creativity and energy is mostly being poured into them rather than the videos these days.
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Oren Alexander, one of the developer's sons and a co-listing broker, said the sale had been in the works for more than six months and was done in cash.
Mother birds fed the lower quality diet, however, later produced far more sons than daughters.
As king, Salman might choose to nominate Ahmed as crown prince, or Salman might seek to do a deal with the more powerful senior princes represented on the Allegiance Council, in order to ensure their agreement to one of his own sons becoming crown prince.
Lewis will walk away from the game because he wants to spend more time with his two sons.
Parents tend to be more protective of their daughters than their sons because the familial costs of pregnancy are higher.
American forces attacked an Iraqi convoy, thought to contain Saddam Hussein and his sons but more probably sheep smugglers, near the border with Syria.
More striking was the phenomenon's sensitivity to timing: sons conceived at the height of the famine (March-April 1945) showed the highest relative risk of schizophrenia.
In 1977 Gill began dividing his time between the stores in Indonesia and the buying office in Singapore as his father gave his sons more responsibility in day-to-day operations.
Most unmarried sons in Japan are, these days, eldest sons, and the prospect of caring for their ever-more antique parents is not altogether enticing for an educated young Japanese woman.
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It has gone, too, in cities such as Shanghai and Beijing, where a survey recently found that many people said they would prefer a daughter on the grounds that daughters were more likely to care for their aged parents than sons.
Having taken Gucci to America, Aldo, one of Guccio's sons, battled his brother Rodolfo for more control and ended up cheapening the Gucci brand through over-licensing.
Because flashy, dominant males tend to mate with disproportionately more females than dull, unassuming ones it makes sense to focus on bringing the best sons to the peak of perfection with a hormone injection that makes them look even flashier than their genes alone would allow.
Married to a fellow doctor, and with two young sons, Dr Kim said he joined Dartmouth "to be more effective at making the world a better place".
The lead plaintiff in this class action, Van-Ness Crawford, has three sons who are forced to attend a high school at which more than 80% of the students are failing mathematics.
"I'm all for bringing more kids into the game and having more tournaments with all kinds of balls and rackets, " said Wayne Bryan, whose sons, Bob and Mike, are the world's top doubles team.
This time he has moved back across the pond to his own Great Britain and forward more than a century, to the dying days of the first Windsor monarch and his succession by two sons.
Until now, the company has remained strictly a family affair, but some industry observers believe Jacques' sons Christian and Olivier Courtin-Clarins--at the helm since 2000--might be more open to a sale than their father.
Until now, the company has remained strictly a family affair, but some industry observers believe Jacques' sons Christian and Olivier Courtin-Clarins--at the helm since 2000--might be more open to a sale than was their father.
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