Efektivitas Ekstrak Cabe Jawa (Piper Retrofractum) Terhadap Maskulinisasi Ika…

Guppy fish (Poecilia reticulata) as known as million fish is one of the most popular freshwater ornamental fish that is in high demand in society and is an export commodity. Morphologically, guppies have a beautiful tail shape and has attractive color especially males, so males have higher commercial than female guppies. An attemp to increase the male sex ratio is masculinization guppies gravid…