Can round goby (Neogobius melanostomus) caught by rod and line be used for diet analysis?

Sample structure and diet of round gobies ( Neogobius melanostomus ) captured by angling (ANG) and electrofishing (EF) at adjacent sites in their native distribution range (Bulgarian Danube) were compared to determine whether ANG fish could be used for diet analysis. In total, 100 round gobies were captured, 52 through angling and 48 by electrofishing. EF fish were significantly smaller than ANG fish, though modal size was comparable. There was...