EFFECTIVENESS OF STRIPED CATFISH TESTIS FLOUR EXTRACT IN MASCULINIZATION OF GUPPY FISH (POECILIA RETICULATA, PETERS) USING THE PREGNANT FEMALE IMMERSION METHOD - Gumelar, Muhammad Gugum; Herman, Roffi Grandiosa; Yustiati, Ayi; Iskandar, Iskandar (Jurnal Perikanan Unram, 2025)