Fruit fly sperm compels females to do housework after sex sessionSeptember 30th, 2009 WASHINGTON - After sex, female fruit flies ditch the usual siesta in favour of extra foraging and searching for places to lay her eggs, a new study has found. The study showed that it is all down to a chemical or 'sex peptide' produced by male fruit flies.
'Randy' male sea lion 'dies of exhaustion' after series of marathon rompsJuly 22nd, 2009 LONDON - A 19-year-old male sea lion from California has mated himself to death at an animal park in Germany. The lion, called Mike, died of exhaustion after a series of marathon lovemaking sessions with his female counterparts in Nuremberg.
Matings with attractive males may be less fertile than those with unattractive onesJuly 10th, 2009 WASHINGTON - A team of University College London and University of Oxford researchers say that a study on the evolution of ejaculation strategies has shown that attractive males release fewer sperm per mating to maximise their chances of producing offspring across a range of females. Writing about their findings in the journal American Naturalist, the researchers say that their findings suggest that, paradoxically, matings with attractive males may be less fertile than those with unattractive ones.
Smart males ration sperm to maximise offspringJuly 10th, 2009 LONDON - Attractive males release fewer sperm per mating to maximise their chances of producing offspring across a range of females, according to a new study. The findings by researchers at UCL (University College London) and the University of Oxford suggest that, paradoxically, mating with attractive males may be less fertile than those with unattractive ones.
Male sea-horses prefer bigger femalesJuly 8th, 2009 LONDON - Male sea-horses prefer bigger females for sex and for bigger offspring, a recent study has revealed. This finding is consistent with predictions on the importance of female body size for reproduction in this species.
Male seahorses prefer large femalesJuly 8th, 2009 WASHINGTON - Swiss scientists have found that male seahorses have a strong preference for large females when it comes to selecting a mating partner. According to Beat Mattle and Tony Wilson from the Zoological Museum at the University of Zurich in Switzerland, by being choosy and preferring large females, they are likely to have more and bigger eggs, as well as bigger offspring,
Seahorses have a unique mode of reproduction: male pregnancy.
Quiet guys in the corner, not flashy ones, score more with femalesJune 19th, 2009 WASHINGTON - Being heavily focused on keeping up appearance might serve as a successful "advertisement" for attracting mates, however, in some species, like stickleback fish, it's the caring ones who score. Yale scientists theorize that when males must provide care for the survival of their offspring, the males' signals will consistently be honest - and they may devote more of their energy to caring for their offspring than to being attractive.
Sport hunters depleting lion and cougar populations in US and AfricaJune 18th, 2009 WASHINGTON - A new study has indicated that sport hunters are depleting lion and cougar populations in the United States and Africa. The study was led by Craig Packer, a University of Minnesota professor and renowned authority on lion behavior, who worked with an international team of conservationists.
Baboon mums 'exploit' chaperonesJune 17th, 2009 LONDON - A new study has shown that male and female baboons form platonic friendships. But while the females clearly benefit, it is a mystery what males get from such relationships.
Feminine looking "sneaker" goby male fish end up getting the most sexJune 16th, 2009 WASHINGTON - Researchers at McMaster University have discovered the existence of two types of males of a fiercely invasive fish spreading through the Great Lakes, which might help explain how they rapidly reproduce. They revealed that in addition to round goby males, which guard the nest from predators and look after their offspring, there exists what scientists call "sneaker" males - little males that look like females and sneak into the nests of the larger males.
Why male flies favour longer copulation timesJune 12th, 2009 WASHINGTON - A study on flies of the species Drosophila montana has shown that females engaged in extended intercourse wait longer before they mate again, increasing the first fly's chances of fathering offspring. Published in the open access journal BMC Evolutionary Biology, the study explains why males favour longer copulation times.
Even bad tutors can's make birds sing badlyMay 28th, 2009 LONDON - Male canaries sing well even when they are exposed to tutors lacking basic features of the song of their species. The learning of birdsong resembles speech learning in humans.
Birds sing well even when exposed to bad tutorsMay 28th, 2009 WASHINGTON - A new study by German researchers has revealed that male canaries sing well even when they are exposed to tutors lacking basic features of the song of their species. The learning of birdsong is similar to speech learning in humans.
Jealous female gorillas offer sex to prevent males from philanderingMay 15th, 2009 LONDON - Jealous female gorillas use sex as a tool to prevent males from having sex with other females, even when they themselves cannot conceive, according to a study. In the study, Tara Stoinski and colleagues at Zoo Atlanta in Georgia analysed how often four captive female gorillas invited sex or copulated over two years.
Bees and ants are true team playersMarch 23rd, 2009 LONDON - In a new research, scientists from Edinburgh and Oxford Universities have found that bees and ants are true team players unlike other creatures who seek safety in numbers for selfish reasons. According to a report by BBC News, the scientists, using mathematical models to study "swarm behaviour", found that bison or fish want to get to the centre of large groups to keep themselves safe from predators.
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