In the present study, a total of 871 farmed fish, 612 gilthead sea bream (Sparus aurata L.) and 259 European sea bass (Dicentrarchux labrax L.), were examined for the presence of anisakid larvae. Two diagnostic methods were applied, visual inspection and artificial digestion based on the degradation of fish soft tissue in an acidified pepsin enzyme solution. None of the samples examined in this study contained any anisakid parasite. The results suggest that consumption of these farmed fish species carries a minimal risk of exposure to these nematodes in this region.

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The fattening of bluefin tuna is a very important economic activity for Spanish aquaculture, and mainly for the Mediterranean area. The feeding is supplied exclusively by bait consisting of complete copies of small pelagic fish and cephalopods like squid. The amount of bait needed to feed these animals is very considerable, since it is estimated between 2 and 10%. The D. G. Livestock and Fisheries within Epidemiological Surveillance Pilot Program in Aquatic Animal Inland Murcia Region started in 2006, provides for the realization of a series of regular checks on the bait used on tuna farms in Murcia´s coast. The objective is to evaluate in a practical way possible transmission of viral diseases to the local wildlife and the rest of aquaculture farms located in the area. In this paper reflects the results of the first four years of this monitoring program.