This paper reports theoretical and experimental studies on spatio-temporal dynamics in the choruses of male Japanese tree frogs. First, we theoretically model their calling times positions as a system coupled mobile oscillators. Numerical simulation well calculation order parameters show that exhibits bistability between two-cluster antisynchronization wavy antisynchronization, by assuming frogs are attracted to edge simple circular breeding site. Second, change shape site from circle...

Significance This study shows how an animal dynamically and rationally controls its sensing navigates to capture multiple prey items. To perform this study, we extracted sonar attention flight of foraging wild bats from both empirical data mathematical modeling. We show that the directed their toward not only immediate but also next prey. In addition, numerical simulation a possibility select suitable paths for consecutive capture. Hence, echolocating plan by distributing among items, which...

Flight paths of echolocating Japanese house bats, Pipistrellus abramus, were tracked during insect hunting in a natural setting using 32-microphone array. The array surrounded the foraging area, locating each bat, and determined directional aim sonar beam. Successive interceptions, indicated by feeding "buzzes" post-buzz pauses, occurred singly at intervals from over 20 s down to multiple interceptions 2–3 intervals. Bats flew on looping, curved paths. Turning radius tightened as rate...

This letter reports synchronization phenomena and mathematical modeling on a frustrated system of living beings, or Japanese tree frogs (Hyla japonica). While an isolated male frog calls nearly periodically, he can hear sounds including other males. Therefore, the spontaneous calling behavior interacting males be understood as coupled oscillators. We construct simple but biologically reasonable model based experimental results two frogs, extend to three theoretically predict occurrence rich...

We experimentally observed synchronized calling behavior of male Japanese tree frogs Hyla japonica; namely, while isolated single called nearly periodically, a pair interacting synchronously almost in antiphase or inphase. In this study, we propose two types phase-oscillator models on different degrees approximations, which can quantitatively explain the phase and frequency properties experiment. Moreover, it should be noted that, although second model is obtained by fitting to experimental...

We employ a mathematical model (a phase oscillator model) to describe the deterministic and stochastic features of frog choruses in which male frogs attempt avoid call overlaps. The with general interaction term is identified using Bayesian approach, it qualitatively reproduces stationary dynamical empirical data. In addition, we quantify magnitude attention paid among from model, then analyse relationship between behavioural parameters statistical approach. Our analysis demonstrates...

Abstract In many animals, males aggregate to produce mating signals that attract conspecific females. These leks, however, also eavesdropping predators and parasites lured by the signal. This study investigates acoustic preferences of eavesdroppers attracted natural choruses in a Neotropical frog, túngara frog ( Engystomops pustulosus ). particular, we examined responses frog‐biting midges variation call properties signaling rates chorus. use calls frogs localize them obtain blood meal....

Abstract Haematophagous insects can rely on specialized host‐seeking behaviors to locate hosts. Some frog‐biting flies, for example, eavesdrop the conspicuous acoustic signals produced by male frogs and toads. Using such auditory cues a host imposes an additional challenge: how recognize appropriate sounds when different frog species produce calls with varying properties. The limited knowledge of antennal hearing in dipteran hinders our ability understand eavesdropping flies detect calls....

We recorded time series data of calls Japanese tree frogs (Hyla japonica; Nihon-Ama-Gaeru) and examined the dynamics experimentally observed not only through linear analysis such as power spectra but also nonlinear reconstruction orbits with delay coordinates different kinds recurrence plots, namely conventional plot (RP), isodirectional (IDRP), iso-directional neighbors (IDNP).The results show that a single frog called nearly periodically, pair periodically alternately in almost anti-phase...

In dense mating aggregations, such as leks and choruses, acoustic signals produced by competing male conspecifics often overlap in time. When at a fine temporal scale the ability of females to discriminate between individual is reduced. Yet, despite this cost, males some species deliberately their with those conspecifics, synchronizing signal production chorus. Here, we investigate two hypotheses synchronized Japanese treefrog ( Buergeria japonica ): (1) increased female attraction chorus...

Prey pursuit by an echolocating bat was studied theoretically and experimentally. First, a mathematical model proposed to describe the flight dynamics of single prey. In this model, angle affected angles related path moving prey, that is, from prey Numerical simulation showed success rate capture high, when mainly used minimize distance also difference in directions itself Second, parameters were estimated according experimental data obtained video recordings taken while Japanese horseshoe...

Interactions using various sensory cues produce sophisticated behaviour in animal swarms, e.g. the foraging of ants and flocking birds fish. Here, we investigate behavioural mechanisms frog choruses from viewpoints mathematical modelling its application. Empirical data on male Japanese tree frogs demonstrate that (1) neighbouring avoid call overlaps with each other over a short time scale (2) they collectively switch between calling state silent long scale. To reproduce these features,...

Abstract Acoustic noise from automobile traffic impedes communication between signaling animals. To overcome the acoustic interference imposed by anthropogenic noise, species across taxa adjust their behavior to increase signal saliency. As most of spectral energy is concentrated at low frequencies, with lower frequency signals are expected be more affected. Thus, low‐frequency under stronger pressure behaviors avoid auditory masking than higher signals. Similarly, for a multiple types that...

Many animals use sounds produced by conspecifics for mate identification. Female insects and anuran amphibians, instance, acoustic cues to localize, orient toward approach conspecific males prior mating. Here we present a novel technique that utilizes multiple, distributed sound-indication devices miniature LED backpack visualize record the nocturnal phonotactic of females Australian orange-eyed tree frog (Litoria chloris) both in laboratory arena animal's natural habitat. Continuous...

A mathematical model is proposed to describe the nonlinear dynamics of echolocation behavior a bat during free flight in an enclosed chamber. In model, dynamically controls its and pulse directions (φf φp respectively), avoid collision with multiple walls chamber; namely, varies φf repulsively from closest wall, minimizing difference between φp. Numerical simulation specific parameter values demonstrates that can successfully fly chamber while emitting pulses along inner periphery...

[abstFig src='/00290001/24.jpg' width='300' text='Sound-to-light conversion devices, Fireflies, in Oki Island and their lighting pattern of frog calling' ] While many robots have been developed to monitor environments, most studies are dedicated navigation locomotion use off-the-shelf sensors. We focus on a novel acoustic device its processing software, which is designed for swarm environmental monitoring equipped with the device. This paper demonstrates that devices useful biological field...

We propose an identification method of sound source locations in outdoor areas by employing direction-of-arrival (DOA) measurements obtained from a microphone array. In determining the sources, at least two microphones must record same sound. Existing methods implicitly assume that sources are distributed area surrounded arrays. They also imply "sound-observable" range should exceed maximum distance between microphones. field, however, microphone-array-deployable limited as just our field...

Animals that aggregate in leks to attract mates often time the production of their mating signals against neighboring conspecifics. Such signal timing usually falls into general patterns within these aggregations, which can be categorized based on amount overlap between signals. In many species, individuals produce an alternating pattern, avoiding reduce interference and increase mate attraction. contrast, some species synchrony, maximizing interference. The prevalence function...

We have analyzed time series data of sound on interactive calling behavior two male Japanese tree frogs (Hyla japonica; Nihon-Ama-Gaeru). First, we extracted mainly corresponding to respective from the single calls by free and cross-platform editor Audacity. Then, quantitatively timing inter-call intervals frogs. Finally, characterized nonstationarily temporal change analysis cross recurrence plot. The results shown that a pair called in almost anti-phase synchronization after short-term...