A new study has suggested that males who evolve in male-dominated populations become far better at securing females than those who grow up in monogamous populations.
According to new research into the behavior of fruit flies at the University of Sheffield, the researchers found that males, who evolved in polyandrous populations, where sexual competition was fierce, are much more likely to outcompete the other males and successfully mate, regardless of the population the female comes from.
The study that appeared in Journal of Evolutionary Biology, led by Dr Allan Debelle and Dr Rhonda Snook in the University’s Department of Animal and Plant Sciences, looked at the mating patterns of fruit flies after they evolved for 100 generations in either polyandrous populations (where several males have to compete for a single female) and monogamous populations (where each male has access to only one female).
In the past, the authors had tested whether or not the courtship behavior of these fruit flies had become different between the populations.
They had found that monogamous females now prefer the courtship of monogamous males, and polyandrous females now prefer the courtship of polyandrous males – a result of the joint evolution of males and females.
Interestingly, in this study, the scientists also observed that monogamous female fruit flies seem more reluctant to mate with polyandrous male fruit flies – but yet in 80 per cent of the cases this didn’t matter because polyandrous males outcompeted monogamous males.
Dr Allan Debelle, who conducted the study as part of his PhD at the University of Sheffield with his supervisor Dr. Rhonda Snook and co-author Professor Mike Ritchie from the University of St.
Andrews, said these results also have implications for how we look at the emergence of new species: “Our research shows that when males evolve under intense sexual competition, they become more and more competitive, and basically turn into ‘super males’.
“This suggests sexual competition can have two opposing evolutionary consequences. It can make courtship behaviour change between populations, which could then prevent matings between them, and lead to more diversification and eventually new species.
“But sexual competition can also produce very competitive individuals, who will mate successfully with everyone, and act against this diversification.”
Dr Rhonda Snook, a co-author of the study and Reader in the University’s Department of Animal and Plant Sciences, added: “Understanding how new species form remains one of the most enduring problems in evolutionary biology.Follow @gorkhapost
NC consults experts on govt’s policies and programs
KATHMANDU — The main opposition party, Nepali Congress, has taken suggestions from experts regarding the government’s policies and programs.
A meeting of the Nepali Congress parliamentary party convened at the parliamentary party’s office in Singha Durbar today consulted with the economists and former bureaucrats on the policies and programs of the government.
The government presented its policies and programs for the fiscal year 2018/19 in the Federal Parliament on Monday.
Deliberations will be held on the policies and programs in the House of Representatives and the National Assembly from Wednesday.
NC leader Dilendra Prasad Badoo, talking to the National News Agency, RSS, said that the meeting reviewed the government’s policies and programs and also discussed on issues the party would speak on in parliament.
Before this, the Nepali Congress had decided to put its views in parliament by forming thematic committees.Follow @gorkhapost