(PhysOrg.com) -- A new study from the University of Reading highlights how climate change is having a detrimental effect on an endangered tropical bird population.
When it comes to producing more offspring, larger female hyenas outdo their smaller counterparts.
(PhysOrg.com) -- For insects, as for humans, mating can involve complicated interactions between males and females, with each partner engaging in rituals or behaviors that influence the other.
Researchers at Columbia University Medical Center have discovered that the skeleton acts as a regulator of fertility in male mice through a hormone released by bone, known as osteocalcin.
Up until now it was unknown whether males of the great bustard (Otis tarda), an emblematic bird in Spain and endangered at a global level, transmit information on their weight, size, and age through their plumage. For the ...
(PhysOrg.com) -- Some animals produce more offspring than others do. Hormones like prolactin and corticosterone can exercise a crucial influence on the behaviour of birds in the breeding season and therefore on their reproductive ...
The reproductive success of men and women is influenced by the food they receive at an early stage in life, according to new research by the University of Sheffield.
Since 1871, when Charles Darwin wrote The Descent of Man, it has been widely accepted that "Variability is the necessary basis for the action of selection." Variability is associated with the ability to adapt, which is clearly ...
(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.
Does the environment encountered early in life have permanent and predictable long-term effects in adulthood? Such effects have been reported in numerous organisms, including humans.