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Hiding opaque eyes in transparent organisms: a potential role for larval eyeshine in stomatopod crustaceans.

The Journal of experimental biology·2014
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Shrimps that pay attention: saccadic eye movements in stomatopod crustaceans.

Philosophical transactions of the Royal Society of London. Series B, Biological sciences·2014
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The molecular genetics and evolution of colour and polarization vision in stomatopod crustaceans.

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Long-term Lethal Toxicity Test with the Crustacean Artemia franciscana
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Visual Rhythms in Stomatopod Crustaceans Observed in the Pseudopupil.

T W Cronin

    The Biological Bulletin
    |January 6, 2018
    PubMed
    Summary

    Mantis shrimps exhibit circadian rhythms influencing their vision. These endogenous rhythms optimize nocturnal eye function for enhanced sensitivity and dynamic range, particularly in species active at night.

    Area of Science:

    • Animal physiology
    • Chronobiology
    • Crustacean vision

    Background:

    • Endogenous rhythms significantly impact animal visual functions.
    • Circadian processes are crucial for adapting sensory systems to environmental cycles.

    Purpose of the Study:

    • To investigate visual rhythms in two stomatopod crustacean species: Squilla empusa (nocturnal/diurnal) and Gonodactylus oerstedii (diurnal).
    • To understand how circadian rhythms affect visual function, specifically pupillary responses, in different light conditions.

    Main Methods:

    • Intracellular optical physiology techniques were employed.
    • Reflectance from the deep pseudopupil of compound eyes was monitored.
    • Experiments were conducted under constant conditions for up to two weeks.

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    Main Results:

    • Both Squilla empusa and Gonodactylus oerstedii displayed circadian rhythms in visual function.
    • Squilla empusa showed a stronger pupillary response during subjective night, with increased pupillary reflectance during subjective day.
    • Rhythms in Gonodactylus oerstedii were of lower amplitude and harder to detect.

    Conclusions:

    • Circadian rhythms play a vital role in optimizing nocturnal vision for sensitivity and dynamic range in arthropods.
    • Species-specific differences in visual rhythms may reflect adaptations to different activity patterns.
    • Endogenous rhythms are fundamental to the adaptive strategies of visual systems in crustaceans.