1. Why Do Orcas Go Through Menopause?
Menopause is rare in the animal kingdom. But why did this trait evolve at all?
When human females live past the age of reproduction, they can provide additional adult supervision—and thus a better chance of survival—for their grandchildren. And according to a new study, the same benefit may have led to the evolution of menopause in orcas.
At the Guardian, Mark Riley Cardwell explains the new findings.

"The researchers believe the reasons for the menopause in killer whales lie in their unusual social structure. Male and female offspring continue to live with their mothers for the duration of their mothers’ life, with males returning to their mothers’ sides after mating with females in other family groups. The mothers take a leading role in the whales’ 40-strong family groups after they stop producing eggs, and share their expertise of when and where food will be available with their younger relatives.
“‘The possible benefits of menopause for killer whales are that the mothers can care for their children and grandchildren and avoid reproductive competition with their daughters,’ said [lead researcher Darren] Croft.”

For more information on menopausal orcas, check out the Guardian article here.
Image via Wikimedia Commons

    Why Do Orcas Go Through Menopause?

    Menopause is rare in the animal kingdom. But why did this trait evolve at all?

    When human females live past the age of reproduction, they can provide additional adult supervision—and thus a better chance of survival—for their grandchildren. And according to a new study, the same benefit may have led to the evolution of menopause in orcas.

    At the Guardian, Mark Riley Cardwell explains the new findings.

    "The researchers believe the reasons for the menopause in killer whales lie in their unusual social structure. Male and female offspring continue to live with their mothers for the duration of their mothers’ life, with males returning to their mothers’ sides after mating with females in other family groups. The mothers take a leading role in the whales’ 40-strong family groups after they stop producing eggs, and share their expertise of when and where food will be available with their younger relatives.

    “‘The possible benefits of menopause for killer whales are that the mothers can care for their children and grandchildren and avoid reproductive competition with their daughters,’ said [lead researcher Darren] Croft.”

    For more information on menopausal orcas, check out the Guardian article here.

    Image via Wikimedia Commons

     
  2. Oct 17th, 2013     sciencebiologymenopauseorcakiller whale
    Comments
    blog comments powered by Disqus
  1. downwhereitswetter reblogged this from trynottodrown
  2. miumiumiao reblogged this from udaitaxim
  3. udaitaxim reblogged this from lifeisjustatheory
  4. lisacaramel reblogged this from breakfast-with-satan
  5. buythevalleyofthestars reblogged this from breakfast-with-satan
  6. peculiarminds reblogged this from breakfast-with-satan
  7. chiefragealot reblogged this from aloemami
  8. aloemami reblogged this from breakfast-with-satan
  9. poorpauvrecoeur reblogged this from breakfast-with-satan
  10. miisseliizabeth reblogged this from breakfast-with-satan
  11. oursecretslikeseeds reblogged this from breakfast-with-satan
  12. a-social-butterflye reblogged this from breakfast-with-satan
  13. wetheyoung reblogged this from breakfast-with-satan
  14. happybeyond-thought reblogged this from breakfast-with-satan
  15. caileysweetman7 reblogged this from breakfast-with-satan
  16. janevandergeest reblogged this from breakfast-with-satan
  17. unordiinary reblogged this from smoothtides
  18. l00neytune reblogged this from smoothtides
  19. caareless reblogged this from breakfast-with-satan
  20. laughinganddying reblogged this from gaydayparade
  21. peaceoutmotherfuckers reblogged this from breakfast-with-satan
  22. l1vel1keyouweredying reblogged this from breakfast-with-satan
  23. smoothtides reblogged this from breakfast-with-satan
  24. krysserdinsky reblogged this from breakfast-with-satan
  25. sataniism reblogged this from breakfast-with-satan
  26. doesitoffenddyou reblogged this from breakfast-with-satan