Optimization of Extraction Conditions of Collagen and Its Characterization from Skin of Jumbo flying squid (Dosidicus gigas) ON THE SELECTIVITIES OF NILAPARVATA LUGENS (STAL) AND SOGATELLA FURCIFERA (HORVATH) FOR RICE PLANTS FED BY IDENTICAL OR ALTERNATIVE PLANTHOPPER SPECIES IN ADVANCE Composition and Optimization of Extraction of Collagen from Navodon septentionalis Skin Using Response Surface Methodology