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首页> 外文期刊>Journal of Fish Biology >The electric organ discharges of the Petrocephalus species (Teleostei: Mormyridae) of the Upper Volta System
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The electric organ discharges of the Petrocephalus species (Teleostei: Mormyridae) of the Upper Volta System

机译：上伏系统的头脑类（Teleostei：Mormyridae）的电器官放电

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摘要

In this study, a first comparative investigation of all four species of Petrocephalus (P. bovei, P. bane, P. soudanensis and P. cf. pallidomaculatus) present in the Upper Volta system and their electric organ discharges (EOD) was conducted. It was found that P. bovei was the most widespread (in terms of habitat use), but in several places P. bovei, P. soudanensis and P. cf. pallidomaculatus occurred syntopically. All species emitted a triphasic signal, and with very few exceptions, the Petrocephalus species of the Upper Volta system could clearly be identified on the basis of their EOD waveforms. The most obvious differences between species in EOD waveforms were in amplitude of the last phase, total duration and fast Fourier transformation (FFT) peak frequency. No sexual dimorphism was present in the EOD of any species although external dimorphism, i.e. an indentation at the base of the anal fin of mature males, was common. The EOD waveform diversity in the Upper Volta principally resembled that found in four sympatric Petrocephalus species from the OgoouE system (Gabon) and might play a role in species recognition and speciation processes.
机译：在这项研究中，对上部Volta系统中存在的所有四种头目（P. bovei，P。bane，P。soudanensis和P. cf. pallidomaculatus）及其电器官放电（EOD）进行了比较研究。据发现，博韦疟原虫是最广泛的（就栖息地利用而言），但在几个地方，博韦疟原虫，苏东疟原虫和参比木pallidomaculatus发生在同位。所有物种均发出三相信号，除了极少数例外，可以根据其EOD波形清楚地识别上沃尔特系统的Petrocephalus物种。 EOD波形中种类之间最明显的差异在于最后一个相位的振幅，总持续时间和快速傅里叶变换（FFT）峰值频率。尽管外部双态性（即成熟雄性的肛门鳍根部有凹痕）是普遍存在的，但任何物种的EOD中都没有性双态性。上沃尔特地区的EOD波形多样性主要类似于在OgoouE系统（加蓬）的四个同伴的Petrocephalus物种中发现的EOD波形多样性，并且可能在物种识别和物种形成过程中起作用。

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