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Related Experiment Videos

Apparent water permeability as a physiological parameter in crustaceans

Rasmussen, Andersen

    The Journal of Experimental Biology
    |January 1, 1996
    PubMed
    Summary

    Apparent water permeability (AWP) measurements using isotope tracers provide reliable physiological data for aquatic invertebrates. This review confirms AWP

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    Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics·2000

    Area of Science:

    • Environmental science
    • Aquatic biology
    • Physiology

    Background:

    • Apparent water permeability (AWP) is estimated using isotope-labeled water flux measurements.
    • The validity of AWP calculations has been questioned, limiting its use in osmotic and fluid homeostasis studies.
    • This review synthesizes three decades of AWP research in aquatic invertebrates.

    Purpose of the Study:

    • To review the application and validity of AWP calculations in aquatic invertebrates.
    • To present data from 24 arthropod species, primarily decapod crustaceans.
    • To explore AWP as a potential biomarker for metal exposure.

    Main Methods:

    • Review of published experiments using isotope-labeled water flux measurements.
    • Analysis of AWP data across various species and environmental conditions.
    • Comparison of AWP results with other physiological studies.

    Main Results:

    • AWP measurements show good inter-investigator agreement across species.
    • AWP is influenced by environmental factors (salinity, temperature, trace metals) and intrinsic factors (ecdysis, life stage).
    • AWP variations reflect physiological strategies in changing environments.

    Conclusions:

    • AWP calculations offer reliable physiological data for crustaceans when methodological limitations are considered.
    • AWP can be a valuable tool for understanding aquatic invertebrate physiology and adaptation.
    • Future applications of AWP in non-crustacean marine invertebrates and as a biomarker are proposed.

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