褐菖鲉发声系统形态结构及其发声特征研究

分别采用形态学和模拟领地入侵的方法研究了褐菖鲉发声系统和发声特征。结果表明，褐菖鲉发声系统由鱼鳔肌和鱼鳔组成。鱼鳔肌前方附着于颅骨的翼耳骨，后经第1～7肋骨，与鱼鳔背后侧部相连。在领地入侵模拟实验中，褐菖鲉发出了连续脉冲的“咕噜噜”声音，其平均脉冲周期为(32.6±2.6) ms，平均脉冲间隔为(51.8±81.4) ms, 主频为68～175 Hz。对单个声音脉冲中包涵的正弦波型的能量周期分析发现：其声音主频与最大能量周期的倒数一致，表明褐菖鲉是采用鱼鳔肌收缩的发声机制。

The morphology of sonic system and sound characteristics of the Marbled rockfish Sebasticus marmoratus

Many fishes are capable of producing sounds for communication. Sound characteristics and sound production system of marbled rockfish Sebasticus marmoratus were investigated. The sound production system consists of swimbladder and swimbladder muscles. The muscles originate on the base of the pterotic bones of skull, pass the I VII ribs, then attach on the posterior portion of the swimbladder dorsolaterally. During dyadic agonistic encounters, the fish produce the sounds that consist of a series of individual pulses with average duration of (32.6±2.6) ms, average interpulse intervals of (51.8±81.4) ms, and dominant frequency of 68-175 Hz from fish about 13 cm in body length. The dominant frequency is consistent with the reciprocal of second energy cycle of pulse. The results suggested that the sound was produced by the contracting and relaxation of swimbladder muscles.