Does Pulsatile Urea Excretion Serve as a Social Signal in the Gulf Toadfish Opsanus beta?*
Does Pulsatile Urea Excretion Serve as a Social Signal in the Gulf Toadfish Opsanus beta?*
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脉冲尿素排泄是否可以作为海湾蟾蜍 Opsanus beta 的社交信号？*
DOI：
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发表时间：
2005
影响因子：
1.6
通讯作者：
P. Walsh
中科院分区：
文献类型：
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作者：
K. Sloman;M. McDonald;J. Barimo;O. Lepage;S. Winberg;C. Wood;P. Walsh
这项研究评估了蟾蜍脉冲式排泄尿素可以作为社会信号的假设。在第一个实验中，测量了成对的优势蟾蜍和从属蟾蜍的生理参数。下级蟾蜍的循环血浆皮质醇浓度升高，即使在插管后这种效应仍然存在。在第二个实验中，一对鱼中的一条被注射了 14C-尿素，并记录了社交过程中尿素脉冲的发生。社会地位并不影响脉冲的顺序，也就是说，在社交遭遇中，是占主导地位的鱼还是从属鱼首先发出脉冲。然而，在八对中有七对中，两条蟾蜍在 2 小时内彼此发出脉冲，这表明鱼之间存在某种形式的交流。在第三个也是最后一个实验中，观察了蟾蜍对尿素（天然或合成）的反应。蟾蜍有避免合成尿素的倾向，但对含有蟾蜍尿素的水没有明显的行为反应。脉冲事件似乎并不像之前假设的那样在社交过程中发挥着不可或缺的作用，但蟾蜍对中脉冲的时间接近表明存在一定的信息传递。
This study evaluated the hypothesis that the pulsatile excretion of urea by toadfish could serve as a social signal. In the first experiment, physiological parameters were measured in pairs of dominant and subordinate toadfish. Subordinate toadfish had elevated concentrations of circulating plasma cortisol, an effect maintained even after cannulation. In the second experiment, one fish of a pair was injected with 14C‐urea, and the occurrence of urea pulses during social encounters was documented. Social status did not influence the order of pulsing, that is, whether a dominant or subordinate fish pulsed first during a social encounter. However, in seven out of eight pairs, both toadfish pulsed within 2 h of each other, indicating some form of communication between fish. In the third and final experiment, the response of toadfish to urea (natural or synthetic) was observed. There was a tendency for toadfish to avoid synthetic urea but there was no apparent behavioural response to water containing toadfish urea. Pulsing events do not appear to play an integral role during social encounters as previously hypothesised, but the close timing of pulses in toadfish pairs suggests some transfer of information.