Killer whale sons need their mom throughout their ... a child or a grandchild means another mouth to feed and more competition for reproduction. If the pod gets too big, there may not be enough ...

leading to particularly high concentrations in top predators like killer whales. DDTs are known as endocrine disruptors, with potential adverse effects on reproduction and immunity. They can bind ...

There only 73 remaining southern resident killer whales. While there is no definitive ... specifically when it comes to reproduction. Michael Weiss of the Centre for Research in Animal ...

These killer whales off the coast of Washington State ... Mom’s grandchild tally however can make up for her own limited reproduction as she coddles her sons, the whale records show.

This means that sons do not just negatively impact their mothers reproduction rate until they ... selection for longer lifespans in female killer whales, while late-life reproductive conflict ...

“The answer is yes – killer whale mothers pay a high cost in terms of their future reproduction to keep their sons alive.” In the study, researchers used data from 1982 to 2021 on 40 females ...

A massive killer whale swam deep into Yaquina Bay, hunting alone and stunning onlookers. Here's what we know about T049C — ...

A killer whale mom, who shot to fame after she carried her dead calf’s corpse with her for more than two weeks in a harrowing tale of grief, has lost another baby, scientists revealed.

It’s not clear what the behavior means. Southern resident killer whales are critically endangered and most likely on a path toward extinction. A killer whale was spotted balancing a salmon on ...