عنوان مقاله [English]
Sefidroud is one of the important water resources of Gilan province and recognition of parasitic condition of this river’s fishes, is very important in determination of juvenile’s destination that are released every year by North Fisheries. In a study of 25 samples of Spirlin in Sefidroud River that were caught in spring 1391, in 3 fishes Glochidia were found. The glochidia is a special microscopic larval stage of some freshwater mussels, aquatic bivalve mollusks in the family’s Unionidae and Margaritiferidae, the river mussels and European freshwater pearl mussels. These fishes were studied of biology, age and sexuality. Also the size and position of larvae were studied. Fishes were 2+ and 3+ and all of them were female. Maximum length of larvae was 1.6 mm and minimum length was 0.8 mm, also maximum height of these larvae was 0.9 mm and minimum height was 0.5 mm.