Shark eye lens isotope records reveal lifetime diet and habitat use patterns

Sora L. Kim

5h ago· 59 min readenNews

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Summary

This article presents a scientific study using eye lens layers (laminae) in sharks as a biochemical archive to reconstruct lifetime diet preferences and habitat use. The method allows researchers to track ecological signals sequentially through time, providing a unique opportunity to document entire life histories of elusive chondrichthyans (sharks, skates, rays, and chimeras). This approach is particularly valuable for understanding how long-lived, mobile species respond to ecological change, with implications for conservation and management as anthropogenic disturbances continue to impact marine ecosystems.

Key quotes

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Eye lens layers (laminae) provide a biochemical archive that records these ecological signals sequentially through time, creating a unique opportunity to reconstruct entire life histories.

Documenting lifetime diet preference and habitat use is critical for understanding how long-lived, mobile species respond to ecological change, yet such data remain sparse.

This approach is especially valuable for elusive chondrichthyans (sharks, skates, rays, and chimeras), whose ecological importance as meso- to apex predators is increasingly recognized.

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1. Tracking diet and habitat use over the lifetime of highly mobile, long-lived species is critical for effective conservation and management, particularly as anthropogenic disturbances continue to...