Fig 3. Spectrograms of identified sciaenid fish calls detected in the May River.

(A) Black drum Pogonias cromis; (B) silver perch Bairdiella chrysoura; (C) spotted seatrout Cynoscion nebulosus; and (D) red drum Sciaenops ocellatus. Spectrograms were created using a rectangular window with window length of 0.1 s and window overlap 90% from original 2 min wav files. Brighter colors indicate higher received sound pressure levels.