Lee Hung-Tai, Huang Bao-Quey, Liao Cheng-Hsin
Department of Environmental Biology and Fisheries Science, National Taiwan Ocean University, Keelung 20224, Taiwan.
Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 20224, Taiwan.
Biology (Basel). 2022 Mar 13;11(3):438. doi: 10.3390/biology11030438.
Sound production in the blackmouth croaker () was characterized using acoustic, morphological, and histochemical methods. Their calls consisted of a train of two to seven pulses; the frequency ranged from 180 to 3000 Hz, with a dominant frequency of 326 ± 40 Hz. The duration of each call ranged from 80 to 360 ms. Male possess a pair of bilaterally symmetric sonic muscles attached to the body wall adjacent to the swim bladder. The average diameter of the sonic muscle fibers was significantly shorter than that of the abdominal muscle fibers. Semithin sections of the sonic muscle fibers revealed a core-like structure (central core) and the radial arrangement of the sarcoplasmic reticulum and myofibrils. Numerous mitochondria were distributed within the central core and around the periphery of the fibers. Most of the fibers were identified as Type IIa on the basis of their myosin adenosine triphosphatase activities, but a few were identified as Type IIc fibers. All sonic muscle fibers exhibited strong oxidative enzyme activity and oxidative and anaerobic capabilities. The features suggest that the sonic muscles of are morphologically and physiologically adapted for fast twitching and fatigue resistance, which support fish vocalization.
使用声学、形态学和组织化学方法对黑口鱼（）的发声进行了表征。它们的叫声由两到七个脉冲组成；频率范围为180至3000赫兹，主频为326±40赫兹。每次叫声的持续时间为80至360毫秒。雄性有一对附着在靠近鳔的体壁上的双侧对称发声肌肉。发声肌肉纤维的平均直径明显短于腹肌纤维。发声肌肉纤维的半薄切片显示出一种核心样结构（中央核心）以及肌浆网和肌原纤维的放射状排列。大量线粒体分布在中央核心内和纤维周边。根据肌球蛋白三磷酸腺苷酶活性，大多数纤维被鉴定为IIa型，但有少数被鉴定为IIc型纤维。所有发声肌肉纤维都表现出很强的氧化酶活性以及氧化和无氧能力。这些特征表明，黑口鱼的发声肌肉在形态和生理上适应快速抽搐和抗疲劳，这有助于鱼类发声。
