Sensory cues for the gradual frequency fall responses of the gymnotiform electric fish, Rhamphichthys rostratus.
Sensory cues for the gradual frequency fall responses of the gymnotiform electric fish, Rhamphichthys rostratus.
复制标题
裸形电鱼 Rhamphichthys rostratus 频率逐渐下降反应的感官线索。
DOI：
10.1007/bf00190176
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Guo,YX
中科院分区：
文献类型：
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作者：
Kawasaki,M;Prather,J;Guo,YX
脉冲型裸形电鱼 Rhamphichthys rostratus 中电器官放电 (EOD) 的一种鲜为人知的频移行为（逐渐频率下降）的感觉线索被确定。我们发现频率逐渐下降的发生与更常见的瞬时相移行为无关，并且是由于邻近鱼的 EOD 对鱼自身 EOD 的感觉反馈的扰动所致。以下成分被认为是鱼自己和邻居的 EOD 脉冲的信号混合中的基本特征：（1）邻居的脉冲必须放置在鱼自己的脉冲的几毫秒内，（2）邻居的脉冲以低频（0.2-4 Hz）单独呈现，就足够了，（3）单个脉冲呈现的频率必须低于 4 Hz，（4） 由邻近脉冲的这种插入引起的鱼自身脉冲的感觉反馈必须包含高频分量：在这些低频下鱼自身EOD反馈的正弦幅度调制不会引起频率逐渐下降。波浪型裸形电鱼的干扰避免反应（JAR）需要跨身体表面的差异刺激，但对于这种行为来说并不是必需的。我们提出在中枢神经系统的幅度处理通路内级联高通和低通频率滤波器作为逐渐频率下降响应的机制。
The sensory cues for a less known form of frequency shifting behavior, gradual frequency falls, of electric organ discharges (EODs) in a pulse-type gymnotiform electric fish,Rhamphichthys rostratus, were identified. We found that the gradual frequency fall occurs independently of more commonly observed momentary phase shifting behavior, and is due to perturbation of sensory feedback of the fish's own EODs by EODs of neighboring fish. The following components were identified as essential features in the signal mixture of the fish's own and the neighbor's EOD pulses: (1) the neighbor's pulses must be placed within a few millisecond of the fish's own pulses, (2) the neighbor's pulses, presented singly at low frequencies (0.2–4 Hz), were sufficient, (3) the frequency of individual pulse presentation must be below 4 Hz, (4) amplitude modulation of the sensory feedback of the fish's own pulses induced by such insertions of the neighbor's pulses must contain a high frequency component: sinusoidal amplitude modulation of the fish's own EOD feedback at these low frequencies does not induce gradual frequency falls. Differential stimulation across body surfaces, which is required for the jamming avoidance response (JAR) of wave-type gymnotiform electric fish, was not necessary for this behavior. We propose a cascade of high-pass and low-pass frequency filters within the amplitude processing pathway in the central nervous system as the mechanism of the gradual frequency fall response.