: Gelatin was extracted from skins and fins of silver carp fish named fitofague by acidic and alkaline
methods with the yield 7.5% in acidic and 6.5% in alkaline method. Quality factors of gelatin such as nutritional
components, gel strength, viscosity and melting temperature in two type’s gelatin were determined and
compared with each other. Rheological properties of alkaline gelatin like gel strength and viscosity are higher
than acidic gelatin. Gelatin derived from silver carp wastes have higher protein content (86-88%) and lower gel
temperature (7-10°C) than mammalian gelatin. In conclusion gelatin extracted from fitofague wastes has good
quality and can be used in the food industries