Small family size increases the wealth of descendants but reduces evolutionary success
Scientists have taken a step closer to solving one of life's mysteries – why family size generally falls as societies become richer.
Key to evolutionary fitness: Cut the calories
Charles Darwin and his contemporaries postulated that food consumption in birds and mammals was limited by resource levels, that is, animals would eat as much as they could while food was plentiful and produce as many offspring ...
High social status, maternal support play important role in mating success of male bonobos
(PhysOrg.com) -- Success makes sexy - this does not only apply to human beings, but also to various animals. Male bonobos appear to benefit from this phenomenon as well.
Successful mothers get help from their friends: Dolphin study
(PhysOrg.com) -- Female dolphins who have help from their female friends are far more successful as mothers than those without such help, according to a landmark new study.
Early growth trajectories have long-term effects on fitness, study finds
(PhysOrg.com) -- Food supply and environmental conditions affect the growth rates of organisms, which in turn influence future survival and reproduction. A new study by researchers at the University of California, ...
For monogamous sparrows, it doesn't pay to stray (but they do it anyway)
It's quite common for a female song sparrow to stray from her breeding partner and mate with the male next door, but a new study shows that sleeping around can be costly.
Male competition over females: An evolutionary engine of genital evolution
When a female mates with several males, these will compete over the fertilization her eggs. This is an important evolutionary force that has led to the evolution of a diversity of male sexual organ morphologies. ...
Study shows the impact of polyandry on reproductive success in fire salamanders
Researchers at Bielefeld University and the Technische Universität Braunschweig are the first to confirm the benefit of multiple paternities for a vertebrate under completely natural conditions. Together ...
How the daisy got its spots... and why
Dark spots on flower petals are common across many angiosperm plant families and occur on flowers such as some lilies, orchids, and daisies. Much research has been done on the physiological and behavioral ...
Rapid growth in adolescence leads to fewer offspring, biologists find
University of California, Riverside biologists working on guppies - small freshwater fish that have been the subject of long-term studies - report that rapid growth responses to increased food availability ...
Mating rivalry among furred and feathered: Variety is spice of life
Birds do it. Bees do it. Fish, lobsters, frogs and lizards do it, too. But when it comes to securing a mate in the animal world, variety is literally the spice of life.
Toucans wearing GPS backpacks help Smithsonian scientists study seed dispersal
Nutmeg-loving toucans wearing GPS transmitters recently helped a team of scientists at the Smithsonian Tropical Research Institute in Panama address an age-old problem in plant ecology: accurately estimating ...
Female spiders prefer the sperm of gift-bearing males
Research published today in Proceedings of the Royal Society B has provided evidence that females prefer males who bring them gifts- at least in the case of the nursery web spider.
Having a strong personality may be the difference between thriving and failing, according to new research
When the chips are down, having a strong personality may be the difference between thriving and failing, according to new research which studied how aphids reacted when faced with predatory ladybirds.