Understanding variation in behavioural responses to human-induced rapid environmental change: a conceptual overview

Animal Behaviour, Journal Year: 2013, Volume and Issue: 85(5), P. 1077 - 1088

Published: March 26, 2013

Language: Английский

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Negative impact of traffic noise on avian reproductive success

Journal of Applied Ecology, Journal Year: 2010, Volume and Issue: 48(1), P. 210 - 219

Published: Dec. 13, 2010

Summary 1. Traffic affects large areas of natural habitat worldwide. As a result, the acoustic signals used by birds and other animals are increasingly masked traffic noise. Masking important to territory defence mate attraction may have negative impact on reproductive success. Depending overlap in space, time frequency between noise vocalizations, such ultimately exclude species from suitable breeding habitat. However direct success has not previously been reported. 2. We monitored avian vocal activity during season alongside busy Dutch motorway. measured variation spectrum tested for effects using long‐term data great tits Parus major . 3. Noise levels decreased with distance motorway, but we also found substantial spatial independent distance. varied temporally March being noisier than April, daytime night‐time. Furthermore, weekdays were clearly weekends. Importantly, overlapped as well vocalization behaviour over area. 4. had effect females laying smaller clutches areas. Variation band that overlaps most lower part tit song best explained observed variation. 5. Additionally, recorded April number fledglings, clutch size, better March. 6. Synthesis applications under noisy conditions can carry cost, even common urban Such costs should be taken into account when protecting threatened species, argue knowledge spatial, temporal spectral species‐specific will effective management. provide some cost‐effective mitigation measures speed reduction or closing roads season.

Language: Английский

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Ecology, sexual selection and speciation

Ecology Letters, Journal Year: 2011, Volume and Issue: 14(6), P. 591 - 602

Published: March 6, 2011

The spectacular diversity in sexually selected traits among animal taxa has inspired the hypothesis that divergent sexual selection can drive speciation. Unfortunately, speciation biologists often consider isolation from natural selection, even though evolve an ecological context: both preferences and are subject to selection. Conversely, while behavioural ecologists may address effects on communication, they rarely measure consequences for population divergence. Herein, we review empirical literature addressing mechanisms by which interact during We find convincing evidence any of these scenarios is thin. However, available data strongly support various diversifying emerge interactions between environmental heterogeneity. suggest evaluating evolutionary requires a better integration behavioural, research.

Language: Английский

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Sound on the rebound: Bringing form and function back to the forefront in understanding nonhuman primate vocal signaling

Evolutionary Anthropology Issues News and Reviews, Journal Year: 2001, Volume and Issue: 10(2), P. 58 - 71

Published: Jan. 1, 2001

Language: Английский

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Essay on Contemporary Issues in Ethology: Variation among Mammalian Alarm Call Systems and the Problem of Meaning in Animal Signals

Ethology, Journal Year: 1993, Volume and Issue: 93(3), P. 177 - 197

Published: Jan. 12, 1993

Abstract Understanding the information conveyed by animal signals requires studies of both production and perception. It is important to determine relationship between signal morphology circumstances production, way signaller behavior varies with motivational state role context in mediating responses signals. Alarm calls are well‐suited research this type because they widespread birds mammals typically evoke unambiguous responses. We review alarm calling primates ground‐dwelling sciurid rodents, concentrating especially on whether these systems may be viewed as ‘functionally referential’, that is, conveying sufficient about an event for receivers select appropriate Comparisons physical, behavioral habitat characteristics species suggest incompatibility escape required avoid different classes predators have been factor evolution functionally referential calls.

Language: Английский

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Anthropogenic noise affects risk assessment and attention: the distracted prey hypothesis

Biology Letters, Journal Year: 2010, Volume and Issue: 6(4), P. 458 - 461

Published: Feb. 17, 2010

Many studies have focused on the effects of anthropogenic noise animal communication, but only a few looked at its effect other behavioural systems. We designed playback experiment to test predation risk assessment. found that in response boat motor playback, Caribbean hermit crabs (Coenobita clypeatus) allowed simulated predator approach closer before they hid. Two hypotheses may explain how affected assessment: it masked an approaching predator's sound; and/or reallocated some crabs' finite attention, effectively distracting them, and thus preventing them from responding threat. no support for first hypothesis: silent looming object still got during playbacks than silence. However, we attentional when added flashing lights further distract crabs, were able more closely with alone. Anthropogenic sounds prey make vulnerable predation.

Language: Английский

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Reduction of physiological stress by urban green space in a multisensory virtual experiment

Scientific Reports, Journal Year: 2019, Volume and Issue: 9(1)

Published: July 12, 2019

Abstract Although stress is an increasing global health problem in cities, urban green spaces can provide benefits. There is, however, a lack of understanding the link between physiological mechanisms and qualities spaces. Here, we compare effects visual stimuli (360 degree virtual photos environment, forest, park) to congruent olfactory (nature city odours) auditory (bird songs noise) on recovery. Participants (N = 154) were pseudo-randomised into participating one three environments subsequently exposed (operationalised by skin conductance levels). The park but not area, provided significant reduction. High pleasantness ratings environment linked low responses for some extent auditory, stimuli. This result indicates that may be better at facilitating reduction than Currently, planners prioritise when planning open spaces, should also consider multisensory qualities.

Language: Английский

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Beaked Whales Respond to Simulated and Actual Navy Sonar

PLoS ONE, Journal Year: 2011, Volume and Issue: 6(3), P. e17009 - e17009

Published: March 14, 2011

Beaked whales have mass stranded during some naval sonar exercises, but the cause is unknown. They are difficult to sight can reliably be detected by listening for echolocation clicks produced deep foraging dives. Listening these clicks, we documented Blainville's beaked whales, Mesoplodon densirostris, in a underwater range where sonars regular use near Andros Island, Bahamas. An array of bottom-mounted hydrophones detect when they click anywhere within range. We used two complementary methods investigate behavioral responses sonar: an opportunistic approach that monitored whale multi-day exercises involving tactical mid-frequency sonars, and experimental using playbacks simulated control sounds tagged with device records sound, movement, orientation. Here show both exposure conditions stopped echolocating dives moved away. During actual were primarily periphery range, on average 16 km away from transmissions. Once exercise stopped, gradually filled center over 2-3 days. A satellite outside exercise, returning days post-exercise. The tags measure acoustic reactions one controlled each military sonar, killer calls, band-limited noise. reacted three sound at pressure levels below 142 dB re 1 µPa stopping followed unusually long slow ascents their combined results indicate similar disruption behavior avoidance different contexts, exposures well those regulators define disturbance.

Language: Английский

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Birds and Anthropogenic Noise: Are Urban Songs Adaptive?

The American Naturalist, Journal Year: 2010, Volume and Issue: 176(4), P. 465 - 475

Published: Aug. 16, 2010

In cities with intense low‐frequency traffic noise, birds have been observed to sing louder and at a higher pitch. Several studies argue that song pitch is an adaptation reduce masking from it has even suggested the divergence between urban nonurban songs might lead reproductive isolation. Here we present models of signal transmission compare benefits raised amplitude in terms sound transmission. We chose two bird species areas, great tit (Parus major) blackbird (Turdus merula). For both species, calculated communication distances response different levels noise their natural forest habitats. found increase vocal increased distance only marginally. contrast, adjustments had strong significantly larger effect. Our results indicate frequency changes are not very effective mitigating noise. Increased be but physiological side effect singing high amplitudes or epiphenomenon urbanization related

Language: Английский

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Low-frequency songs lose their potency in noisy urban conditions

Proceedings of the National Academy of Sciences, Journal Year: 2011, Volume and Issue: 108(35), P. 14549 - 14554

Published: Aug. 19, 2011

Many animal species communicate with their mates through acoustic signals, but this communication seems to become a struggle in urbanized areas because of increasing anthropogenic noise levels. Several bird have been reported increase song frequency by which they reduce the masking impact spectrally overlapping noise. However, it remains unclear whether such behavioral flexibility provides sufficient solution noisy urban conditions or there are hidden costs. Species may rely on low frequencies attract and impress females, use high may, therefore, come at cost reduced attractiveness. We studied potential tradeoff between signal strength detection successful species, great tit ( Parus major). show that low-frequency songs males is related female fertility as well sexual fidelity. experimentally impair male–female efficiency depends presence Our data reveal response advantage for high-frequency during signaling conditions, whereas likely be preferred. These critical our understanding wild-ranging birds, provide evidence being linked reproductive success affected noise-dependent efficiency.

Language: Английский

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