Laboratory experiments demonstrate that the hissing of the Chinese alligator can effectively inhibit movement of flower fish Ptychobarbus kaznakovi

摘要: Acoustic barriers, which can deter fish from accessing hazardous areas, have the potential to protect valuable stocks. Previous studies demonstrated that some prey species detect and avoid their predators using sound cues. Such anti-predator responses may be used in acoustic barriers hinder movement of fish. In this study, phonotaxic flower (Ptychobarbus kaznakovi) were investigated a playback approach an outdoor fiberglass tank. By alternating speakers sounds emitted playbacks pure tones (500–3000 Hz) as references, broadband recording Chinese alligator Alligator sinensis hissing (0.05–5 kHz) was broadcast underwater speakers. The numbers transverse swimming speeds assessed. Only 15% responded with one response, while had average 8.4 during 5-min trials when exposed (sound hissing). reacted by away significantly faster than they did tones. Our results suggest effective deterrent for repelling