Two competing Russian groups, Ecoresoursy and VNIRO, say they have figured out how to make caviar without killing the fish. In both cases, the sturgeon gets a hormone injection to make it ovulate,
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/sturgeon-surgeons-extract-caviar-live-fish-will-eggs-sell
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-wall-street-journal-hong-kong
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fisheries