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Bioluminescent Bacterial Imaging In Vivo
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Published on: November 4, 2012

Cryptic bioluminescence in a midwater shrimp.

J A Warner, M I Latz, J F Case

    Science (New York, N.Y.)
    |March 16, 1979
    PubMed
    Summary

    The mesopelagic shrimp Sergestes similis uses bioluminescence to camouflage against downwelling light. Its light output rapidly adjusts to match background intensity, originating from the hepatopancreas.

    Area of Science:

    • Marine Biology
    • Bioluminescence Research
    • Crustacean Physiology

    Background:

    • The mesopelagic shrimp Sergestes similis exhibits ventral bioluminescence.
    • This light emission is crucial for counter-illumination camouflage in the ocean's twilight zone.

    Purpose of the Study:

    • To investigate the characteristics and control of bioluminescence in Sergestes similis.
    • To identify the source and sensory mechanisms of light production and detection.

    Main Methods:

    • Spectral analysis of light emission.
    • Masking experiments to identify photoreceptors.
    • Observation of light output modulation in response to changing illumination.

    Main Results:

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  • Sergestes similis produces ventrally directed bioluminescence matching downward light intensity.
  • Light output is rapidly modulated to match background light changes.
  • The hepatopancreas is the source of light emission, with characteristics similar to oceanic light.
  • Compound eyes or adjacent tissues are involved in detecting background light.

    • Conclusions:

    • Sergestes similis possesses a sophisticated counter-illumination system.
    • The shrimp can actively control its bioluminescence for camouflage.
    • This adaptation is vital for survival in the visually complex mesopelagic environment.