Figure 1.

Developmental plasticity of male calls of N. triops. (a) Schematic call structures of versed summer call (black trace) and continuous winter call (grey trace). (b) Temperature dependencies of summer and winter calls. Filled diamonds indicate amplitude modulation (AM) rates (double-pulse rates) of summer calls and open diamonds indicate rates of winter calls (data and regression lines from Whitesell & Walker 1978). Filled circle indicates mean AM rate (±s.d.) of calls of summer males (n=25) and the open circle indicates that of winter males (n=15) raised in this study.