Mother knows best: finches choose chicks' gender
Female parrot finches can match their offspring's gender to prevailing living conditions, producing more sons in lean times, scientists in Australia said Wednesday.
The old primates' club: Even male monkeys ride their fathers' coattails to success
(Phys.org) -- If you're a male born to a father who's a strong and enduring community leader, you're far more likely than your less fortunate peers to become a leader yourself, due to the wide range of social ...
High-energy lifestyles led to evolution of the sexes
Scientists are a step closer to explaining one of the most enduring mysteries of modern biology; why are there males and females?
To flirt or not to flirt, that is the question
(PhysOrg.com) -- After studying male desert goby fish, a team of Monash researchers has suggested that male sexual behaviour is primed to produce the greatest number of offspring.
Scientists show that female fruit flies can be 'too attractive' to males
Females can be too attractive to the opposite sex -- too attractive for their own good -- say biologists at UC Santa Barbara. They found that, among fruit flies, too much male attention directed toward attractive ...
Housing shortage alters reproductive behaviour in blue tits
(PhysOrg.com) -- Increased competition for rare breeding sites causes female blue tits to invest more time in their current brood, to spend more time feeding their offspring and also to produce more male offspring ...
Tiny male spiders can get a leg over—as long as they're picky
Males will mate with anything. Well, that is the general view, one that exists because of a simple biological underpinning: females are reproductively limited by costly gestation, while males are only limited ...
Superdaddy Pyros keeps Pyrenees bear numbers up
The number of bears roaming the Pyrenees remained stable at a minimum of 22 last year, thanks largely to the continued virility of Pyros, the undisputed daddy of the colony.
Male chimpanzees choose their allies carefully
Study finds male chimpanzees may increase their chances of siring offspring by recognizing the importance of third-party relationships.
Single spider dads caring for eggs suffer no disadvantages despite parenting costs
Single fatherhood is a challenge many arachnids undertake, guarding eggs laid by females despite the costs to their own health and mating benefits, but the news may not be all bad for these dads.
Multiple husbands serve as child support and life insurance in some cultures: researcher
(Phys.org) -- Marrying multiple husbands at the same time, or polyandry, creates a safety net for women in some cultures, according to a recent study by a University of Missouri researcher. Extra husbands ...
Contact with 'rivals' changes male behavior
Males consistently change their mating behaviour depending on whether they have spent time with other males before mating, according to new findings by scientists at the University of East Anglia (UEA).
Family composition determines success of great tit parents
Great tits who have as many sons as daughters acquire more grandchildren than great tits with an uneven family composition. That is because their children are reproductively more successful concludes NWO researcher Reinder ...
Polyandry drives increased embryo viability
An experimental evolutionary study on house mice (Mus musculus) has found multiple mating is beneficial for both males and females.