Fish Physiology and Biochemistry

, Volume 15, Issue 6, pp 481–489 | Cite as

Hematological response in fish: pronephric and splenic involvements in the goldfish,Carassius auratus L.

  • A. H. Houston
  • W. C. Roberts
  • J. A. Kennington


Pronephric and splenic involvements in erythropoiesis and in stress-induced hematological response by goldfish,Carassius auratus, were examined under conditions of minimal stress and following transient (3h) temperature-induced elevation of O2 demand and transient (3h) exposure to hypoxia. Although hemoglobin content and red cell numbers were little affected, the ontogenic composition of the circulating erythrocyte population was significantly altered by both types of respiratory challenge and also by the stresses associated with capture, air exposure during transfer and intraperitoneal administration of label. Juvenile cell numbers increased sharply while mature erythrocyte abundances declined. Consistent with this, [3H] methylthymidine-labeled cell numbers rose in both spleen and pronephros following imposition of stress. Splenic erythropoietic activity was modest relative to that of the pronephros. Our observations point to a readily triggered response involving: [1] release of cells reservoired in the spleen and pronephros, [2] increased erythropoiesis and [3] karyorrhexis. We suggest that while the magnitude of response may depend on the quality and magnitude of the imposed stress, its central features are essentially constant.


goldfish hematological response erythropoiesis spleen pronephros 


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Copyright information

© Kugler Publication bv Amsterdam 1996

Authors and Affiliations

  • A. H. Houston
    • 1
  • W. C. Roberts
    • 1
  • J. A. Kennington
    • 1
  1. 1.Department of Biological SciencesBrock UniversitySt. CatharinesCanada

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