Mama orcas are forgoing having more young and instead dote on their existing sons.
Killer whale mothers are sacrificing their own reproductive prospects to guarantee the future success of their sons.
Researchers have found that this doting mother-son relationship is true amongst the 73 resident orcas that currently make up the"southern resident" population, a group that inhabits the waters off the coasts of Washington state and British Columbia.
While sticking with their moms may prove beneficial for the males, the daughters, on the other hand, are cut off entirely from prey sharing by their moms once they reach sexual maturity, typically sometime between 6 and 10 years of age, according to the statement.So, why are mom orcas giving their sons preferential treatment and not their daughters? Researchers think it all comes down to an evolutionary cost/benefit analysis.
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