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Iron metabolism in pigeons.

J Ramis, J Planas

    Quarterly Journal of Experimental Physiology and Cognate Medical Sciences
    |October 1, 1978
    PubMed
    Summary

    Pigeons exhibit rapid iron uptake and high plasma iron turnover compared to other birds. Their blood rapidly incorporates iron, with ribs and sternal keel being key sites for red blood cell production in young birds.

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    Area of Science:

    • Avian hematology
    • Iron metabolism
    • Comparative physiology

    Background:

    • Understanding avian hematological parameters is crucial for assessing health and physiological adaptations.
    • Iron is vital for erythropoiesis and oxygen transport in all vertebrates.

    Purpose of the Study:

    • To investigate key hematological parameters in urban pigeons.
    • To compare iron turnover and distribution in pigeons with other avian species.
    • To identify the role of specific organs in iron metabolism.

    Main Methods:

    • Determination of hemoglobin, hematocrit, erythrocyte count, reticulocyte count, plasma iron, and total iron-binding capacity.
    • Radioisotope (59Fe) studies to measure plasma iron turnover and organ distribution.
    • Comparative analysis with published data from turkeys, ducks, and chickens.

    Main Results:

    • No significant sex-based differences were observed in the measured hematological parameters.
    • Pigeons demonstrated the highest plasma iron turnover values relative to body weight among the studied avian species.
    • Radioiron rapidly accumulated in pigeon blood, reaching 98% of the injected dose by day 2, with a linear decrease thereafter.
    • The liver showed an inverse relationship with blood iron levels, while the heart maintained a constant iron content.

    Conclusions:

    • Urban pigeons possess a highly efficient iron uptake and transport system, particularly in their circulatory blood.
    • The ribs and sternal keel are identified as significant erythropoietic organs in young pigeons.
    • Pigeon iron metabolism differs notably from that of domestic fowl, ducks, and turkeys, especially on a per-body-weight basis.

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