To avoid destructive sampling for conservation and genetic assessment, we isolated the DNA of clam Cyclina sinensis from their feces. DNA electrophoresis and PCR amplification were used to determine the quality of fecal DNA. And we analyzed the effects of different conditions on the degradation of feces and fecal DNA. | Fecal DNA isolation and degradation in clam Cyclina sinensis: Noninvasive DNA isolation for conservation and genetic assessment