A species' demographic history gives important context to contemporary population genetics and a possible insight into past responses to climate change; with an individual's genome providing a window into the evolutionary history of contemporary populations. Pairwise sequentially Markovian coalescent (PSMC) analysis uses information from a single genome to derive fluctuations in effective population size change over the last ~5 million years. Here, we apply PSMC analysis to two European nightjar () genomes, sampled in Northwest and Southern Europe, with the aim of revealing the demographic history of nightjar in Europe.
View Article and Find Full Text PDFIn this paper, techniques for time-frequency analysis and investigation of bat echolocation calls are studied. Particularly, enhanced resolution techniques are developed and/or used in this specific context for the first time. When compared to traditional time-frequency representation methods, the proposed techniques are more capable of showing previously unseen features in the structure of bat echolocation calls.
View Article and Find Full Text PDFSoprano pipistrelles exhibit considerable plasticity in both the structure and rate of echolocation call production. In search phase in the laboratory, calls are produced either as a single pulse per wingbeat cycle, or as double pulses. The amplitude of double pulses is reduced compared to the preceding single pulse.
View Article and Find Full Text PDFRousettus aegyptiacus Geoffroy 1810 is a member of the only genus of Megachiropteran bats to use vocal echolocation, but the structure of its brief, click-like signal is poorly described. Although thought to have a simple echolocation system compared to that of Microchiroptera, R. aegyptiacus is capable of good obstacle avoidance using its impulse sonar.
View Article and Find Full Text PDF