The smell of familiarity: conspecific faeces influence roost exploration and occupation in wild Bechstein's bats

Animal Behaviour, Journal Year: 2025, Volume and Issue: 224, P. 123182 - 123182

Published: April 24, 2025

Language: Английский

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Neural oscillations in the fronto-striatal network predict vocal output in bats

PLoS Biology, Journal Year: 2020, Volume and Issue: 18(3), P. e3000658 - e3000658

Published: March 19, 2020

The ability to vocalize is ubiquitous in vertebrates, but neural networks underlying vocal control remain poorly understood. Here, we performed simultaneous neuronal recordings the frontal cortex and dorsal striatum (caudate nucleus, CN) during production of echolocation pulses communication calls bats. This approach allowed us assess general aspects mammals unique evolutionary adaptations bat echolocation. Our data indicate that before vocalization, a distinctive change high-gamma beta oscillations (50–80 Hz 12–30 Hz, respectively) takes place striatum. Such precise fine-tuning could allow animals selectively activate motor programs required for either or vocalizations. Moreover, functional coupling between striatal areas, occurring theta oscillatory band (4–8 Hz), differs markedly at millisecond level, depending on whether are navigational mode (that is, emitting pulses) social (emitting calls). Overall, this study indicates fronto-striatal provide correlate

Language: Английский

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Internal State: Dynamic, Interconnected Communication Loops Distributed Across Body, Brain, and Time

Integrative and Comparative Biology, Journal Year: 2021, Volume and Issue: 61(3), P. 867 - 886

Published: June 8, 2021

Internal state profoundly alters perception and behavior. For example, a starved fly may approach consume foods that it would otherwise find undesirable. A socially engaged newt remain in the presence of predator, whereas solitary attempt to escape. Yet, definition internal is fluid ill-defined. As an interdisciplinary group scholars spanning five career stages (from undergraduate full professor) six academic institutions, we came together provide operational could be useful understanding behavior function nervous systems, at timescales relevant individual. In this perspective, propose define through integrative framework centered on dynamic interconnected communication loops within between body brain. This informed by synthesis historical contemporary paradigms used neurobiologists, ethologists, physiologists, endocrinologists. We view as composed both spatially distributed networks (body-brain loops), temporally mechanisms weave neural circuits, physiology, Given wide spatial temporal scales which operates-and therefore broad range defined-we choose anchor our body. Here focus studies highlight body-to-brain signaling; represented endocrine signaling, brain sensory signaling. potentially unites disparate often scientists grappling with body-brain interactions. invite others join us examine approaches question assumptions study underlying dynamics state.

Language: Английский

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An automatic classifier of bat sonotypes around the world

Methods in Ecology and Evolution, Journal Year: 2021, Volume and Issue: 12(12), P. 2432 - 2444

Published: Sept. 18, 2021

Abstract Bioacoustics is one of the most popular methods in bat research. Bat species are identifiable through their echolocation call features (e.g. peak frequency, duration, bandwidth) but amounts recordings to process generally require help machine learning algorithms. Yet, classifiers only developed some areas world and it may take dozens years before they available everywhere because reference calls still lacking for numerous species. Our goal was develop a universal classifier that would classify sonotypes according shape frequency. To achieve this, we first defined eight sonotype categories cover all shapes worldwide. We then trained using random forest decision trees with database 1,154,835 labelled sound events containing non‐bat sounds from four continents. After classification, group detected probability scores predicted category tested performance our on different set originating five Depending tested, (area under ROC curve) ranged between 0.77 0.99 low‐quality (SNR < 25 dB). Performance 0.89 1 middle‐ or high‐quality ≥ The feeding buzz classification 0.93 0.98 depending SNR. not social calls; majority them were classified as sonotype. an open data format can be used by anyone study bats around world. It spot acoustically described which developed, even detect yet. grouping frequency describe communities compare composition acoustic niches across time space. This allows monitoring assessment conservation issues any region

Language: Английский

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Information transfer about food as a reason for sociality in bats

Mammal Review, Journal Year: 2018, Volume and Issue: 49(2), P. 113 - 120

Published: Dec. 22, 2018

Abstract Information transfer about food is a potential reason for sociality in many animals. If an animal better informed, it should then be able to adjust its behaviour and reduce the uncertainty of finding variable world. Given remarkable range social systems ecological niches bats throughout world, are well‐suited as model review mechanisms fitness consequences information food. The aim this manuscript was conduct systematic literature their bats. found under various conditions, including groups males temperate regions, or females subtropical mixed tropical regions. Bats can learn indirectly, example via chemical cues carried by breath body frugivorous bats, acoustic from feeding buzzes insectivorous majority playback studies captivity wild showed stronger intra‐specific inter‐specific attraction than silence controls search phase calls. also directly, signals intended attract, repel even jam echolocation conspecifics. Social foraging categorised local enhancement, information‐centre hypothesis, group sharing, depending on type sources used. Fitness actor's recipient's perspective remain poorly investigated date. Recent suggest balance benefits prey searching costs interference that may condition size. future use wide array methods promises reveal exciting insights

Language: Английский

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Bat sonar and wing morphology predict species vertical niche

The Journal of the Acoustical Society of America, Journal Year: 2019, Volume and Issue: 145(5), P. 3242 - 3251

Published: May 1, 2019

The use of echolocation allows insectivorous bats to access unique foraging niches by locating obstacles and prey with ultrasounds in complete darkness. To avoid interspecific competition, it is likely that sonar features wing morphology co-evolved species vertical distribution, but due the technical difficulties studying flight dimension, this has never been demonstrated empirical measurements. authors equipped 48 wind masts arrays two microphones located distribution a community 19 bat groups over their annual activity period (&gt;8000 nights). tested correlation between proportion flights at height acoustic calls as well morphology. found call peak frequency bandwidth are good predictors space regardless strategies (i.e., gleaning, hawking, or detecting flutter). High aspect ratios high loadings were associated proportions time spent height, confirming hypotheses from literature.

Language: Английский

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High frequency social calls indicate food source defense in foraging Common pipistrelle bats

Scientific Reports, Journal Year: 2020, Volume and Issue: 10(1)

Published: April 1, 2020

Abstract Social calls have the function to coordinate behavior of animals. In presence conspecifics foraging Common pipistrelle bats ( P. pipistrellus) emitted, in addition typical echolocation signals, two types social calls: complex and an as-of-yet undescribed, short, frequency-modulated call type with high terminal frequency, which we term “high frequency call”. By recording flight acoustic free flying pairs pipistrellus array four microphones were able determine their three-dimensional paths attribute emitted particular behavioral situations. Complex at further inter-individual distances large bearing angles conspecifics, whereas produced significantly shorter smaller angles. These associated chasings eviction intruder. We assume that emission both by reflects a two-stage-process occupation defense food patch. use claim patch switch agonistic behaviors, including emissions, when they defend territory against

Language: Английский

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Acoustic Context Modulates Natural Sound Discrimination in Auditory Cortex through Frequency-Specific Adaptation

Journal of Neuroscience, Journal Year: 2021, Volume and Issue: 41(50), P. 10261 - 10277

Published: Nov. 8, 2021

Sound discrimination is essential in many species for communicating and foraging. Bats, example, use sounds echolocation communication. In the bat auditory cortex there are neurons that process both sound categories, but how these respond to acoustic transitions, is, streams followed by a communication sound, remains unknown. Here, we show context, leading sequence target changes neuronal discriminability of versus calls awake bats sexes. Nonselective fire equally well absence context become category selective when present. On contrary, prefer turn into nonselective ones added. The presence leads an overall response suppression, strength this suppression stimulus specific. Suppression strongest belong same category, e.g.,echolocation echolocation. A neuron model stimulus-specific adaptation replicated our results silico . predicts selectivity inputs arriving cortex, as two forms adaptation, presynaptic frequency-specific acting cortical stimulus-unspecific postsynaptic adaptation. addition, predicted effects can last up 1.5 s after offset synaptic tuned low-frequency (communication signals) have shortest decay constant SIGNIFICANCE STATEMENT We studied responses isolated call mixtures (1) populations coexist including discriminate social from driven ethologically different types; (2) (i.e., other natural preceding sound) affects manner could not be based on sounds; (3) computational similar those used explaining rodents account observed sounds. This depends segregated feedforward inputs, depression,

Language: Английский

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Hearing sensitivity and amplitude coding in bats are differentially shaped by echolocation calls and social calls

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2021, Volume and Issue: 288(1942), P. 20202600 - 20202600

Published: Jan. 6, 2021

Differences in auditory perception between species are influenced by phylogenetic origin and the perceptual challenges imposed natural environment, such as detecting prey- or predator-generated sounds communication signals. Bats well suited for comparative studies on since they predominantly rely echolocation to perceive world, while their social calls most environmental have low frequencies. We tested if hearing sensitivity stimulus level coding bats differ high low-frequency ranges measuring brainstem responses (ABRs) of 86 belonging 11 species. In species, was equally good at both high- ranges, amplitude more finely coded higher frequency ranges. Additionally, we conducted a analysis combining our ABR data with published 27 Species-specific peaks correlated peak frequencies pup isolation calls, suggesting that changes evolved response calls. Overall, study provides comprehensive assessment bat capacities date highlights evolutionary pressures acting sensory perception.

Language: Английский

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Neural Response Selectivity to Natural Sounds in the Bat Midbrain

Neuroscience, Journal Year: 2020, Volume and Issue: 434, P. 200 - 211

Published: Jan. 7, 2020

Language: Английский

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