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Study Reveals Distinct Genetic Lineages in Sperm Whales

4/10/2026

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Summary

Story summary

A new study finds Gulf of Mexico and western North Atlantic sperm whales are genetically distinct due to maternal behavior.
Female whales maintain separate lineages, while males travel widely and mix genes.
The National Oceanic and Atmospheric Administration (NOAA) lists sperm whales as endangered.
The study notes the effective population size is near 460 and recommends treating Gulf and Atlantic whales separately to preserve genetic diversity.

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Story summary

A new study finds Gulf of Mexico and western North Atlantic sperm whales are genetically distinct due to maternal behavior.
Female whales maintain separate lineages, while males travel widely and mix genes.
The National Oceanic and Atmospheric Administration (NOAA) lists sperm whales as endangered.
The study notes the effective population size is near 460 and recommends treating Gulf and Atlantic whales separately to preserve genetic diversity.