The waste scrap from the North Pacific squid processing was used as raw material.Effect of extrusion process parameters on the physical properties of extruded squid protein using a twin screw extruder was studied employing response surface methodology.Twin extrusion cooking running parameters,feed moisture,barrel temperature and screw speed were examined as input variables.Meanwhile,as output variables,physical properties of the resultant extrudates included moisture and bulk density.Results showed that moi...