Science

Choosing mates using logic

Ipsita Herlekar explains how fruit flies have been found to use logical reasoning when choosing partners

Choosing mates using logic

A new study has discovered that fruit flies (Drosophila melanogaster), unlike many of us make rational decisions while choosing partners.

Experiments were conducted by scientists from the University of British Columbia and University of Washington, where, individual male flies were given the choice of choosing between two females as their mates. Male fruit flies were paired with 10 different females flies of different genetic strains. With as many as 2700 trials using different combination of male and female fruit flies, it was found that males were able to pick out females that are most likely to produce the maximum amount of offspring.

The males were also found to be consistent in their choices, choosing females ranking higher in the hierarchy over the others. For example; if female fruit fly A is the highest in rank, followed by B, C, D and so on, males, when given a choice between A and B, always chose A. Similarly when given a choice between B and C, the males chose B. The ranking ranking of a female fruit fly relates to the amount of offspring it is able to produce.

Similar experiments were conducted but, after impairing either the sense of smell or the sight of the male fruit flies, their mate choosing pattern remained unchanged. However, when both their eyesight and sense of smell were impaired, the males failed to detect the ranking hierarchy in females, leading the scientists to conclude that the choices made earlier were based on a combination of visual and olfactory cues.

Making decisions based on logic has always been associated as a trait unique to humans. This study turns out to be among the first of its kind, providing evidence that some species besides humans may also be capable of rational decision making.processes.

From Issue 1654

27th Jan 2017

Discover stories from this section and more in the list of contents

Explore the edition

Read more

Peter Haynes to take over Provost role in October

News

Peter Haynes to take over Provost role in October

Professor Peter Haynes has been appointed as the new Provost and Deputy President of Imperial College. The current  Vice-Provost for Education and Student Experience, Haynes will succeed the outgoing Provost, Professor Ian Walmsley, who has served in the role since 2018. Imperial President Hugh Brady said Professors Haynes and Walmsley

By Guillaume Felix
Why RAG’s bungee jump event never took place

News

Why RAG’s bungee jump event never took place

Earlier this academic year, Imperial Raising and Giving (RAG), had announced the return of their charity bungee jump after a hiatus of 10 years. The event, however, was postponed several times, and Felix can now reveal why it was cancelled. The event, initially scheduled for November 13th, was postponed several

By Mohammad Majlisi and Nadeen Daka
Palestine protests ramp up as year ends and tensions rise

News

Palestine protests ramp up as year ends and tensions rise

Saturday 7th June: Pro-Palestinian protestors hold banners as they stand on ALERT at the Great Exhibition Road Festival. Tuesday 10th June: A student announces a hunger strike asking for Imperial to investigate Islamophobia and anti-Arab racism, form a student-staff working group on ethical investment, and divest from arms companies accused

By Mohammad Majlisi