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Full-Text Articles in Life Sciences
Grunt Variation In The Oyster Toadfish Opsanus Tau: Effect Of Size And Sex, Michael L. Fine, Tyler D. Waybright
Grunt Variation In The Oyster Toadfish Opsanus Tau: Effect Of Size And Sex, Michael L. Fine, Tyler D. Waybright
Biology Publications
As in insects, frogs and birds, vocal activity in fishes tends to be more developed in males than in females, and sonic swimbladder muscles may be sexually dimorphic, i.e., either larger in males or present only in males. Male oyster toadfish Opsanus tau L produce a long duration, tonal boatwhistle advertisement call, and both sexes grunt, a short duration more pulsatile agonistic call. Sonic muscles are present in both sexes but larger in males. We tested the hypothesis that males would call more than females by inducing grunts in toadfish of various sizes held in a net and determined incidence …
Pectoral Sound Generation In The Blue Catfish Ictalurus Furcatus, Yasha Mohajer, Zachary Ghahramani, Michael L. Fine
Pectoral Sound Generation In The Blue Catfish Ictalurus Furcatus, Yasha Mohajer, Zachary Ghahramani, Michael L. Fine
Forensic Science Publications
Catfishes produce pectoral stridulatory sounds by “jerk” movements that rub ridges on the dorsal process against the cleithrum. We recorded sound synchronized with high-speed video to investigate the hypothesis that blue catfish Ictalurus furcatus produce sounds by a slip–stick mechanism, previously described only in invertebrates. Blue catfish produce a variably paced series of sound pulses during abduction sweeps (pulsers) although some individuals (sliders) form longer duration sound units (slides) interspersed with pulses. Typical pulser sounds are evoked by short 1–2 ms movements with a rotation of 2°–3°. Jerks excite sounds that increase in amplitude after motion stops, suggesting constructive interference, …