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Temperature adaptation in fish.

M W Smith

    Biochemical Society Symposium
    |January 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Goldfish intestinal adaptation to temperature changes occurs in three steps, affecting ion transport and cell function over weeks. This research details the biochemical and functional shifts in fish intestines following thermal stress.

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    Area of Science:

    • Physiology
    • Biochemistry
    • Cell Biology

    Background:

    • Environmental temperature significantly impacts fish physiology, particularly secretory epithelial tissues.
    • Sudden temperature shifts necessitate adaptive responses in fish intestinal function.

    Purpose of the Study:

    • To elucidate the adaptive mechanisms of goldfish intestinal tract to sudden environmental temperature changes.
    • To detail the temporal sequence of functional and biochemical adaptations in fish intestines.

    Main Methods:

    • Observational study detailing adaptive steps in goldfish intestinal tract.
    • Analysis of microvillar membrane permeability to sodium.
    • Investigation of phospholipid composition and amino acid transport.
    • Assessment of sodium-pump activity and cell synthesis.

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    Main Results:

    • Adaptation occurs in three distinct stages over weeks.
    • Stage 1 (15-20h): Altered non-electrolyte transport and sodium permeability.
    • Stage 2 (32-48h): Changes in membrane phospholipids and amino acid transport.
    • Final stage: Regulation of sodium-pump activity linked to cell synthesis.

    Conclusions:

    • Goldfish intestinal adaptation to temperature is a multi-step process involving ion transport and membrane composition.
    • Phospholipid fatty acyl composition changes correlate with altered membrane function.
    • Long-term adaptation involves sodium-pump regulation and cellular turnover.