DEGRADATION CHARACTERISTICS OF GOLDEN LION TAMARIN<i>LEONTOPITHECUS ROSALIA</i>TWO-PHRASE LONG CALLS: IMPLICATIONS FOR CALL DETECTION AND RANGING IN THE EVERGREEN FOREST

Sabatini, Vera; Ruiz‐Miranda, Carlos R.; Dabelsteen, Torben

doi:10.1080/09524622.2011.9753640

Cited by 10 publications

(9 citation statements)

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“…This is presumably caused by scattering in the frequency and structure of the call by the surrounding dense vegetation of the forest in which those calls are produced (Wiley, 1991). Similar effects of the dense understory vegetation have been reported in acoustic signals of birds and mammals (Dabelsteen et al, 1993;Sabatini et al, 2011;Sandoval, Barrantes et al, 2015;Sandoval, Dabelsteen et al, 2015;Piza & Sandoval, 2016). The attenuation and degradation found in the common dink frog were similar to those reported in vocalizations adapted to be transmitted effectively within dense vegetation, such as in antbird species (Nemeth et al, 2001) and rufous-and-white wrens .…”

Section: Discussionmentioning

confidence: 56%

“…We compared the signal degradation and attenuation of calls in the transmission experiments using general linear mixed models (LMM), for each response variable (signal-to-noise ratio, excess attenuation, tail-to-signal ratio, and blur ratio), following the approach used in similar experiments Graham et al, 2017;Nemeth et al, 2006;Sabatini et al, 2011;Sandoval, Dabelsteen et al, 2015;Vargas-Castro et al, 2017). The GLMM included the distance (four levels), speaker position (three levels), and the interaction of these predictor variables as fixed factors.…”

Section: Discussionmentioning

confidence: 99%

“…Hence, sound transmission experiments allow better-controlled hypotheses testing. Furthermore, sound transmission experiments have been widely used to test the transmission properties of several animal sounds (e.g., frogs, birds, and mammals) in different habitats (Boncoraglio & Saino, 2007;Ey & Fischer, 2009;Gerhardt, 1994;Graham et al, 2017;Nemeth et al, 2001;Velásquez et al, 2018), or to compare different call types (Piza & Sandoval, 2016;Sabatini et al, 2011) and song types (Penna & Solís, 1998;Sandoval, Dabelsteen et al, 2015;Vargas-Castro et al, 2017), providing evidence on how sound reverberation improves sound transmission (Nemeth et al, 2006;Slabbekoorn & Smith, 2002), with different vegetations types (Graham et al, 2017;Velásquez et al, 2018), or at different heights Nemeth et al, 2001).…”

Section: Me Thodsmentioning

confidence: 99%

“…Additionally, we measured the level of background noise before the start of each stimulus and after applying the filter settings of each call. As in other studies (Dabelsteen et al, 1993;Sabatini et al, 2011;Sandoval, Dabelsteen et al, 2015), we considered that the background noise before each stimulus was the same that overlapped the calls during the experiment.…”

Section: Sound Analysismentioning

confidence: 99%

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Male orientation on vocalization perches could optimize acoustic signal transmission in anurans

et al. 2020

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Acoustic signals are distorted by vegetation, wind currents, or other sounds when transmitted through the environment. Consequently, vocalizations with features that optimize sound transmission or behaviors that improve the efficacy of communication have evolved in many animal species. Among behavioral strategies, some species call from perches above the ground to increase the propagation distance of their acoustic signals. However, the orientation in the perch also influences the transmission of the vocalizations, so that frogs calling from different orientations (i.e., horizontal, upward, or downward) may affect differently the quality and efficacy of sound transmission. We implemented a sound transmission experiment to test for the effect of calling orientation (upward, downward, and horizontal) and distance on the attenuation and degradation of advertisement calls in the common dink frog Diasporus diastema. We broadcasted and re‐recorded advertisement calls at 2 m height, setting the speaker in three directions (upward, downward, and horizontal) to simulate different signaler orientations. We found that attenuation of the advertisement calls is significantly reduced when the speaker was directed either upward or downward, rather than horizontally. However, the degradation of call is lower when the speaker is direct horizontally. Since calls produced from either upward or downward orientations could travel farther, they could be used to signal male spatial location, while calls produced from a horizontal position could provide information on male quality at shorter distances at advanced phases of courtship.

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Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Section: Me Thodsmentioning

confidence: 99%

Section: Sound Analysismentioning

confidence: 99%

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Male orientation on vocalization perches could optimize acoustic signal transmission in anurans

et al. 2020

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“…The surveyor used playback equipment (digital recorder and speaker) to play GLT vocalizations at 30, 60, 90 and 120 m from the estimated center of the group. We selected those distances based on previous research on the attenuation of GLT calls in the forest [35, 36]. The calls used for playbacks were obtained from social groups unknown to the study groups.…”

Section: Methodsmentioning

confidence: 99%

Estimating population sizes to evaluate progress in conservation of endangered golden lion tamarins (Leontopithecus rosalia)

Miranda

Morais

Dietz³

et al. 2019

PLoS ONE

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Efforts to reverse the decline of endangered golden lion tamarin monkeys have been relatively successful because the Brazilian organization dedicated to the species’ conservation (Associação Mico-Leão-Dourado, AMLD) relies on science-based computer modeling to determine the number of tamarins necessary to achieve demographic and genetic goals, and a process of strategic planning to achieve those goals. Accurate estimates of the numbers of tamarins in forest fragments are essential to evaluate progress in achieving goals and adapt strategies as necessary. In this report we present the results of a new method to survey the number of tamarins in the wild, a modification of the point transect with lures procedure. Using this method, we estimate that in 2014 there were approximately 3,700 golden lion tamarins in 41,400 hectares of Atlantic Forest. Of these, 59% are from remnant wild populations, 34% are descendants of captive-born reintroduced animals and 7% are descendants of wild translocated groups. The number of tamarins and amount of forest estimated in this survey exceeded values necessary to meet AMLD’s definition of a viable population, determined to be 2,000 tamarins in 25,000 hectares of connected and protected forest. However, the seven forest blocks and their tamarin populations are not yet adequately connected and protected. AMLD’s strategic plan to achieve a viable population of golden lion tamarins includes 12 strategies that mitigate these and other threats or contribute directly to the conservation goal. The point transect with lures survey method provides a way to evaluate progress in achieving that goal and adapt strategies as appropriate.

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Primate Habitat Acoustics

Brown

Waser

2017

Springer Handbook of Auditory Research

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DEGRADATION CHARACTERISTICS OF GOLDEN LION TAMARINLEONTOPITHECUS ROSALIATWO-PHRASE LONG CALLS: IMPLICATIONS FOR CALL DETECTION AND RANGING IN THE EVERGREEN FOREST

Cited by 10 publications

References 46 publications

Male orientation on vocalization perches could optimize acoustic signal transmission in anurans

Male orientation on vocalization perches could optimize acoustic signal transmission in anurans

Estimating population sizes to evaluate progress in conservation of endangered golden lion tamarins (Leontopithecus rosalia)

Primate Habitat Acoustics

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