Figure 1 in The influence of flood pulses on the reproductive strategy of two species of passalid beetle in the fluvial archipelago of Anavilhanas, Amazon, Brazil

Figure 1. Variation in the water level of the Negro River plotted against the monthly abundance of larvae of Passalus abortivus collected between April 1996 and March 1997 from 10 islands on the alluvial plain, which is periodically inundated, at the ecological station of Anavilhanas, Novo Airão, Amazonas State, Brazil. Notes: Line, abundance of larvae; columns, average level (m).