Fig. 4
From: First reference on reproductive biology of Butis koilomatodon in Mekong Delta, Vietnam
Monthly variation of gonadosomatic index of male and female Butis koilomatodon in Duyen Hai – Tra Vinh (a), Cu Lao Dung – Soc Trang (b), Tran De – Soc Trang (c), Hoa Binh – Bac Lieu (d), Dong Hai – Bac Lieu (e) and Dam Doi – Ca Mau (f)