Big whales, on the other hand, will have big female calves that will grow into long mothers with strong reproductive potential. For baleen whale mothers, investing energy in female calves is the best ...

Some male whales compete for mates, but competition might not be as significant a pressure as female size because small female whales will likely struggle to reproduce and raise healthy young. Big ...

Long baleen whale mothers are more likely to have female calves than males, according to a new study led by the University of Washington. The findings contradict a popular evolutionary theory ...