Immunological reactions in the early onthogenesis of Atlantic salmon and humpback salmon

Abstract

The data on the inflammation and regeneration processes in the Atlantic salmon and humpback salmon at the early stages of onthogenesis during the action of the damaging agent are presented. Phagocyte phenomena related to the physiological displacement of the yolk into the organs and tissues of embryos are observed in tissues of the developing embryos. Inflammation processes are accompanied by accumulation of tissue liquid in the mesoderm derivatives and by increase of hydrophilia of cellular elements. Formation of inflammation processes accompanied by simultaneous slowing of regeneration processes rate is registered in pre-larvae and larvae. Regeneration becomes the final stage of an organism reaction to the damage. Inflammation reaction components in juvenile salmon of the current year and yearlings are already developed. Phagocytes of the epithelial origin are found at the early stages of inflammation. A typical leucocyte ''wall'' is formed at the later inflammation stages. Epithelium is growing into the wound canal and separates dead cells from the cluster of leucocytes. Trauma of the striped muscle fibres in one area does not lead to necrosis of the whole muscle segment in the yearlings.