HYPERPLASIA OF THE ADRENAL CORTICAL TISSUE IN PACIFIC SALMON (GENUS ONCORHYNCHUS) AND RAINBOW TROUT (SALMO GAIRDNERII) ACCOMPANYING SEXUAL MATURATION AND SPAWNING

摘要: A comparative study was made of the histological changes occurring in adrenal cortical tissue Pacific salmon, sea-run steelhead trout, and non-migratory rainbow trout at various stages their life cycles with purpose ascertaining whether there exists a relationship between degree hyperplasia spawning survival thereafter. These three fishes show varying post-spawning outcomes from death all salmon to partial mortality usual trout. The tissue, found cephalic end kidney, consists sexually immature fish small isolated groups characteristic cells which are usually associated branches cardinal vein. With onset gonadal development begin increase number by time sexual maturity is reached steelhead, marked present. this hyperplastic larger than those an...