Figure 1From: Use of black carp (Mylopharyngodon piceus) in biological control of intermediate host snails of fish-borne zoonotic trematodes in nursery ponds in the Red River Delta, VietnamSnail density in nursery ponds before (open column) stocking with fry and with 2 black carp specimens (BC) or only fry (control) and 3 months later (shaded column) in three households in Nam Dinh Province, Vietnam 2011. Error bars show 95% confidence limits.Back to article page