Researchers have found a clue to understand the mechanism behind why females live longer than males.
A study from the University of Exeter showed that male flies die earlier than their female counterparts when forced to evolve with the pressures of mate competition and juvenile survival.
Male IBS Patients Experience Greater Interpersonal Difficulties Compared to Females
Male patients of irritable bowel syndrome (IBS) are more stressed and experience more interpersonal difficulties compared to female patients.
Advertisement
The research used populations of the fly Drosophila simulans that had evolved under different selection regimes. The study shows that mate competition (sexual selection), along with survival (natural selection), was tougher on male ageing than it is on females reducing their lifespan by about a third.
Professor David Hosken from Biosciences at the University of Exeter said that they found dramatic differences in the effects of sexual and natural selection on male and female flies. These results could help explain the sex differences in lifespan seen in many species, including humans, and the diverse patterns of ageing we observe in nature.
![High-fat Meal More Dangerous for Males Than Females: Study]( "High-fat Meal More Dangerous for Males Than Females: Study")
A new study reveals high-fat meals have a different effect on male and female brains. Differences in male brains lead to greater inflammation and increased health risks in males.
The flies were subjected to elevated or relaxed sexual and natural selection and left to evolve in these conditions. To elevate sexual selection groups of males were housed with single females. A stressful temperature was used to elevate natural selection.
Males court females by singing, dancing and smelling good but their efforts come at considerable cost and this cost is amplified when they also have to cope with stressful temperatures.
The results of the study showed that under relaxed sexual and natural selection, male and female flies had very similar lifespans - around 35 days. However males that evolved under elevated sexual selection and elevated natural selection had a much shorter lifespan - just 24 days - and died seven days earlier than females under the same conditions.
Both sexual selection and natural selection were found to affect lifespan but their effects were greatest on males. The findings show that the sexes can respond differently to the same selection regimes.
The study is published in the journal Functional Ecology.
Source: ANI
High-fat Meal More Dangerous for Males Than Females: Study
A new study reveals high-fat meals have a different effect on male and female brains. Differences in male brains lead to greater inflammation and increased health risks in males.
Advertisement
The flies were subjected to elevated or relaxed sexual and natural selection and left to evolve in these conditions. To elevate sexual selection groups of males were housed with single females. A stressful temperature was used to elevate natural selection.
Males court females by singing, dancing and smelling good but their efforts come at considerable cost and this cost is amplified when they also have to cope with stressful temperatures.
The results of the study showed that under relaxed sexual and natural selection, male and female flies had very similar lifespans - around 35 days. However males that evolved under elevated sexual selection and elevated natural selection had a much shorter lifespan - just 24 days - and died seven days earlier than females under the same conditions.
Both sexual selection and natural selection were found to affect lifespan but their effects were greatest on males. The findings show that the sexes can respond differently to the same selection regimes.
The study is published in the journal Functional Ecology.
Source: ANI
Scientists Look to Exploit Females' Natural Resistance to Infection
Females are naturally more resistant to respiratory infections than males.
Advertisement
Advertisement
|
Advertisement
Latest Research News
Link between chromosome length and biological aging marker discovered. The finding helps explain why people with longer telomeres have a lower dementia risk.
Integrated structural biology helps discover how the cystic fibrosis transmembrane conductance regulator (CFTR) works.
Link between advanced paternal age and higher risks for reproductive and offspring medical problems has been discovered.
Can gene astrology predict disease risk? Yes, your genes can determine your future health and disease risk.
Injury to the white matter explains why football players are at an increased risk for cognitive and behavioral problems later in life.