the motility of the sperm was found to decrease with increasing field strength.the ability of the electroporated sperm to fertilize salmon ova was comparable to the control sperm.the rates of development of the control and treated embryos were similar.Succesful transfer of DNA was indicated by Southern analysis. Depending on the electroporation condition,1 out of 20 fry in one experiment, and 2 out of 20 fry in a second experiment showed hybridization to pRSV-lacZ DNA. whether the plasmid DNA detected in these fry was integrated or not is not clear,but three bands were detected in all the positive fly.