LARVAL ANISAKIDS (NEMATODA, ASCARIDOIDEA) IN HORSE MACKEREL (TRACHURUS-TRACHURUS) FROM THE FISH MARKET IN GRANADA, SPAIN

Horse mackerel (Trachurus trachurus) from the fish market in Granada, southern Spain, were surveyed for anisakid nematodes. The fish came fr om fishing ports all over the country. Larval anisakids were found in 39.4% of the fish examined; 26.1% were infected with third-stage larva e (L3s) of Anisakis simplex 0.3%, with A. physeteris L3s; 31.1%, with Hysterothylacium aduncum L3s; and 1.7%, with fourth-stage larvae (L4s) of Hysterothylacium sp. Horse mackerel from Mediterranean Sea coastal ports (South and Southeast Spain) had the lowest levels of infection, and those from Cantabrian Sea coastal ports (North Spain) had the hig hest. The variation in infection levels with host size (age) and seaso n of capture are surveyed.