TISSUE SPECIFICITY IN EMBRYONIC AND ADULT CYMATOGASTER AGGREGATA STUDIED BY SCALE TRANSPLANTATION

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Abstract
Adults and newly-born individuals of the viviparous perch, C. aggregata reject scale homografts after a short period of time. The time required for graft rejection is in approximately inverse proportion to the age of the animals. Increased sensitivity to scale homografts results from successive transplantation. Intra-ovarian larvae are incapable of rejecting homografts. Pregnant females can transfer homograft sensitivity to intra-ovarian larvae. It is hypothesized that circulating antibody is transferred to the larvae via the ovarian fluid and the larval hindgut.