Male orcas (in the back) remain in close association with their mothers throughout their lives, which may allow them to benefit in several ways from the social support provided by a postreproductive mother. Photo: Michael Wenger. Postmenopausal female orcas are very...
This is how scientists imagine the fish-hunting orca ancestor Rododelphis stamatiadisi based on the fossil findings discovered by the international team: Image: Rossella Falen Orcas and false killer whales(Orcinus orca and Pseudorca crassidens) living today are known...
Orcas live in clans led by a female. Depending on whether they are Residents or Transients, the members are more or less closely related to each other. Theoretically, therefore, menopause should occur less or not at all in the leader. But the researchers were wrong....