Decoupled Evolution between Senders and Receivers in the Neotropical Allobates femoralis Frog Complex.
Decoupled Evolution between Senders and Receivers in the Neotropical Allobates femoralis Frog Complex.
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DOI：
10.1371/journal.pone.0155929
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Amézquita A
中科院分区：
文献类型：
--
作者：
Betancourth-Cundar M;Lima AP;Hӧdl W;Amézquita A
在声学通信过程中，声音信息从发送者传输到接收者，通常会导致行为的变化。在一个系统中，发送者的进化变化不会导致接收者的相应调整，通信和物种识别可能会失败。然而，发送者和接收者之间进化解耦的可能性很少被研究。以其形态、遗传和声学上的广泛变异而著称的青蛙种群分布在大叶蛙的隐蔽物种复合体中。我们假设，股骨吸虫声音信号的地理变异与通过雄性-雄性识别的变化而在交流中的地理变化相关。为了验证这一假说，我们在亚马逊流域的八个地点对带有两个、三个和四个音符的广告呼叫的回放实验进行了语音定向反应，对男性呼叫识别进行了量化。然后，我们在系统发育框架中重建了召唤音符号码的祖先状态，并评估了最近共同祖先的特征状态是否预测了当前对两个、三个和四个音符的相对反应。在大多数种群中，男性对广告叫声的音向性反应的概率受到叫声中频和音符数量的强烈影响。正向趋音性对于每个个体群体的叫声是完全的，在一些群体中，对于异位叫声也是部分的；然而，在两个群体中，个体同样地识别两个、三个或四个音符的叫声。这一证据与我们的系统发育比较方法的结果相结合，支持了在雌雄复合体的雄性-雄性通信系统中发送者和接收者之间解耦进化的假说。因此，信号识别的进展似乎比通话慢得多。
During acoustic communication, an audible message is transmitted from a sender to a receiver, often producing changes in behavior. In a system where evolutionary changes of the sender do not result in a concomitant adjustment in the receiver, communication and species recognition could fail. However, the possibility of an evolutionary decoupling between sender and receiver has rarely been studied. Frog populations in the Allobates femoralis cryptic species complex are known for their extensive morphological, genetic and acoustic variation. We hypothesized that geographic variation in acoustic signals of A. femoralis was correlated with geographic changes in communication through changes in male-male recognition. To test this hypothesis, we quantified male call recognition using phonotactic responses to playback experiments of advertisement calls with two, three and four notes in eight localities of the Amazonian basin. Then, we reconstructed the ancestral states of call note number in a phylogenetic framework and evaluated whether the character state of the most recent common ancestor predicted current relative responses to two, three and four notes. The probability of a phonotactic response to advertisement calls of A. femoralis males was strongly influenced by the call mid-frequency and the number of notes in most populations. Positive phonotaxis was complete for calls from each individual's population, and in some populations, it was also partial for allotopic calls; however, in two populations, individuals equally recognized calls with two, three or four notes. This evidence, in conjunction with our results from phylogenetic comparative methods, supports the hypothesis of decoupled evolution between sender and receiver in the male-male communication system of the A. femoralis complex. Thus, signal recognition appears to evolve more slowly than the calls.