The Edge morning radio host sent the image through the Snapchat social media took, which allows a user to send a photo for a set length of time before it disappears, The New Zealand Herald on Sunday reported.
Harvey said he meant to send the image to radio producer Sophie Hallwright and immediately apologized to Pascoe after he realized his mistake.
"So sorry about that Snapchat. I know you like beef and lamb ... but nobody deserves a surprise pork sausage," he said.
Pascoe tweeted about the incident just before winning a gold medal in the 100-meter freestyle at the IPC Championship swimming meet in Canada.
"Just finished eating dinner and opened Snapchat. #awkward surprise," she wrote.
Harvey's employer, Mediaworks, condemned the incident, but said it wouldn't take an disciplinary action against their employee.
"It was a stupid thing to do," said program director Leon Wratt. "No one feels stupider than Dom himself but he has apologized. No disciplinary action is planned."