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Related Concept Videos

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Related Experiment Video

Updated: Aug 6, 2025

A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect
05:04

A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect

Published on: September 22, 2023

500

Animal behavior: Killer whale mamas' boys.

Janet Mann1

  • 1Department of Biology, Department of Psychology, Georgetown University, Washington, Washington DC 20057, USA.

Current Biology : CB
|March 14, 2023
PubMed
Summary

Sons of killer whales remain with their mothers permanently, which aids their survival but reduces the mother

Area of Science:

  • Marine biology
  • Behavioral ecology
  • Mammalian reproduction

Background:

  • Killer whales (Orcinus orca) exhibit complex social structures.
  • Extended alloparental care and lifelong natal group association are observed in some cetacean species.
  • Understanding the evolutionary drivers of extended maternal care is crucial.

Purpose of the Study:

  • To investigate the long-term effects of sons' lifelong association with their mothers in killer whales.
  • To quantify the impact of this behavior on maternal reproductive success.

Main Methods:

  • Analysis of a long-term dataset on killer whale populations.
  • Tracking of individual whale movements and reproductive histories.
  • Statistical modeling to assess the relationship between sons' presence and maternal output.

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Last Updated: Aug 6, 2025

A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect
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Using Chronic Social Stress to Model Postpartum Depression in Lactating Rodents
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Using a Comparative Species Approach to Investigate the Neurobiology of Paternal Responses
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Using a Comparative Species Approach to Investigate the Neurobiology of Paternal Responses

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Main Results:

  • Killer whale sons remain associated with their mothers throughout their lives.
  • Mothers with lifelong resident sons exhibit significantly lower reproductive rates compared to those without.
  • This association provides survival benefits for sons but incurs a reproductive cost for mothers.

Conclusions:

  • Lifelong allomaternal care in killer whales represents a life-history trade-off.
  • The benefits of sons staying with mothers are balanced against reduced future offspring production.
  • This social structure has significant implications for population dynamics and evolutionary strategies in killer whales.