| Sealworm infestation in various fish species, especially cod, has become a chronic cosmetic problem for fish processing industry in North Atlantic fishing nations. Various methods have been developed over the years for detection of sealworms in fish tissue. However, all of them are labor intensive and sealworms cannot be detected when embedded deeper than 6 mm in the fish tissue.;The potential of employing ultrasonic waves to detect sealworms embedded deep in the fish tissue was demonstrated. Attenuation of ultrasound in the frequency range from 1.0 and 12.25 MHz was studied in Atlantic cod, haddock, ocean catfish, and sealworms. The effect of freezing of cod and sealworms on the attenuation was also studied, with the radiation force technique at 20... |
