Oxford University scientists have found that flies living with their brothers cause less harm to females during courting than those living with unrelated flies. The study found that unrelated male flies compete more fiercely for females’ attention than related flies resulting in shorter lifespans for males and reduced fecundity for females. 'In large populations brothers don’t need to compete so much with each other for female attention since their genes will get passed on if their sibling mates successfully anyway' Dr Tommaso Pizzari of Oxford University’s Department of Zoology who led the study said. 'Their more relaxed attitude to
