Echolocation in the bat, Rhinolophus capensis: the influence of clutter, conspecifics and prey on call design and intensity.
Echolocation in the bat, Rhinolophus capensis: the influence of clutter, conspecifics and prey on call design and intensity.
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DOI：
10.1242/bio.201511908
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发表时间：
2015-05-18
期刊：
影响因子：
2.4
通讯作者：
Ratcliffe JM
中科院分区：
文献类型：
--
作者：
Fawcett K;Jacobs DS;Surlykke A;Ratcliffe JM
回声定位蝙蝠不仅暴露在自己叫声的回声中，而且经常接触到同种蝙蝠和其他蝙蝠的信号。对于发射短的调频信号的物种，例如维斯利酮类化合物，在这种情况下观察到了频率和时间域的调整。然而，使用长持续时间、恒定频率的蝙蝠可能会面临特殊的挑战，因为这些蝙蝠应该不太能够避免时间和频率重叠。在这里，我们研究了高占空比蝙蝠的回声定位叫声设计，当蝙蝠在大型室外飞行室中以同种或异种飞行时。我们将这些录音与蝙蝠在同一飞行室内和较小的飞行室内单独飞行并捕食被拴住的飞蛾的录音进行了比较。我们发现不同条件下卡氏沼虾叫声的占空比或峰值频率没有差异。然而，在同种或卵翅目昆虫的存在下，短翅小蜂在其叫声的末端产生了更长的调频向下扫频，其最低频率低于单独飞行时。与单独飞行或与同种蝙蝠一起飞行时相比，在较大的高负载循环蝙蝠--斜纹夜蝠的存在下，冠毛蝙蝠产生的叫声更短。这些变化类似于从开阔的环境飞行到更杂乱的环境中的维斯普利翁。它们与与其他蝙蝠一起飞行时观察到的维斯普利酮的差异并不相似。同样，与vespertilinys不同的是，同种对中的响声强度比单独使用时要低15分贝。
Echolocating bats are exposed not only to the echoes of their own calls, but often the signals of conspecifics and other bats. For species emitting short, frequency modulated signals e.g. vespertilionoids, adjustments in both the frequency and time domain have been observed in such situations. However, bats using long duration, constant frequency calls may confront special challenges, since these bats should be less able to avoid temporal and frequency overlap. Here we investigated echolocation call design in the highduty cycle bat, Rhinolophus capensis, as bats flew with either a conspecific or heterospecific in a large outdoor flight-room. We compared these recordings to those made of bats flying alone in the same flight-room, and in a smaller flight room, alone, and hunting tethered moths. We found no differences in duty cycle or peak frequency of the calls of R. capensis across conditions. However, in the presence of a conspecific or the vespertilionoid, Miniopterus natalensis, R. capensis produced longer frequency-modulated downward sweeps at the terminus of their calls with lower minimum frequencies than when flying alone. In the presence of the larger high-duty cycle bat, R. clivosus, R. capensis produced shorter calls than when flying alone or with a conspecific. These changes are similar to those of vespertilionoids when flying from open to more cluttered environments. They are not similar to those differences observed in vespertilionoids when flying with other bats. Also unlike vespertilinoids, R. capensis used calls 15 dB less intense in conspecific pairs than when alone.
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影响因子：
2.7
作者：
Jacobs, David S.;Barclay, Robert M. R.;Walker, Maryalice H.
通讯作者：
Walker, Maryalice H.
DOI：
10.1139/z04-074
发表时间：
2004-06-01
期刊：
CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE
影响因子：
--
作者：
Ratcliffe, JM;ter Hofstede, HM;Spanjer, G
通讯作者：
Spanjer, G
影响因子：
2
作者：
Bartonicka, T.;Rehak, Z.;Gaisler, J.
通讯作者：
Gaisler, J.
影响因子：
2.3
作者：
JONES, G;RAYNER, JMV
通讯作者：
RAYNER, JMV
DOI：
10.1007/s00359-012-0739-9
发表时间：
2012-09-01
影响因子：
2.1
作者：
Furusawa, Yuto;Hiryu, Shizuko;Riquimaroux, Hiroshi
通讯作者：
Riquimaroux, Hiroshi