Geographical variation in the echolocation calls of bent-winged bats, Miniopterus fuliginosus
Geographical variation in the echolocation calls of bent-winged bats, Miniopterus fuliginosus
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弯曲翅蝙蝠（Miniopterus fuliginosus）回声定位呼叫的地理差异
DOI：
10.1016/j.zool.2018.05.005
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发表时间：
2018-12-01
期刊：
影响因子：
2
通讯作者：
Feng, Jiang
中科院分区：
文献类型：
--
作者：
Zhang, Chunmian;Jiang, Tinglei;Feng, Jiang
进化生物学家长期以来一直对动物声音信号的地理变异背后的进化力量感兴趣。然而，驱动声学变化的进化力量仍然不清楚。在这项研究中，我们量化的回声定位呼叫的峰值频率在8个长翼蝠蝙蝠殖民地的地理变化，并评估驱动声学分歧的力量。我们的结果表明，七个菌落具有非常相似的峰值频率，而只有一个菌落显著高于其他菌落。这种相似性的回声定位呼叫频率之间的七个殖民地可能是由于频繁的扩散和迁移，导致男性介导的核基因的渗透。这种渗透增强了基因流动并削弱了生态选择，并且还增加了同种存在下的相互作用。声学距离与形态距离、气候差异、地理距离和mtDNA遗传距离之间均未发现显著相关。然而，在声学距离的变化显着正相关与nDNA遗传距离，即使控制了地理距离。有趣的是，排除了呼叫频率最高的殖民地后，呼叫分歧与遗传距离之间的关系不再显著，这可能是由于其他7个蜂群之间的遗传距离最小。在一个殖民地中观察到的回声定位呼叫的最高频率可能是由于该地区响亮的背景噪音而受到选择压力的影响。两者合计，这些结果表明，地理分歧的回声定位电话可能不会受到遗传漂变，而是，强烈的选择压力引起的背景噪声可能会导致声学和遗传分化JXT和其他殖民地之间。
Evolutionary biologists had a long-standing interest in the evolutionary forces underlying geographical variation in the acoustic signals of animals. However, the evolutionary forces driving acoustic variation are still unclear. In this study, we quantified the geographical variation in the peak frequencies of echolocation calls in eight Miniopterus fuliginosus bat colonies, and assessed the forces that drive acoustic divergence. Our results demonstrated that seven of the colonies had very similar peak frequencies, while only one colony was significantly higher than the others. This similarity in echolocation call frequency among the seven colonies was likely due to frequent dispersal and migration, leading to male-mediated infiltration of nuclear genes. This infiltration enhances gene flow and weakens ecological selection, and also increases interactions in the presence of conspecifics. Significant correlations were not observed between acoustic distances and morphological distances, climatic differences, geographic distances or mtDNA genetic distances. However, variation in acoustic distances was significantly positive correlated with nDNA genetic distance, even after controlling for geographic distance. Interestingly, the relationship between call divergence and genetic distance was no longer significant after excluding the colony with the highest call frequency, which may be due to the minimal genetic distance among the other seven colonies. The highest frequencies of echolocation calls observed in the one colony may be shaped by selection pressure due to loud background noise in the area. Taken together, these results suggest that geographic divergence of echolocation calls may not be subject to genetic drift, but rather, that the strong selective pressure induced by background noise may lead to acoustic and genetic differentiation between JXT and the other colonies.