تالاب گميشان (جنوب شرق درياي خزر) RUTILUS RUTILUS CASPICUS مطالعه سن و رشد ماهي كلمه

Study of age and growth of Caspian roach (Rutilus rutilus caspicus) in Gomishan wetland (Southeastern Caspian Sea)

This study was carried out to determine age and growth of Caspian Roach (Rutilus rutilus caspicus) in Gomishan wetland during November 1998 to May 2000. 240 female specimens and 306 male specimens were aged by scale count method. The growth was estimated based on Ford-walford method. The result showed that 8+ was the oldest age group for both sexes. The most abundant ages were 3-5 years. The maximum growth was observed between 1+ and 2+. The growth slowed down after 2+.