Hearing and Sound Production in the Aquatic Salamander, Amphiuma means

Crovo, Jenna A.; Zeyl, Jeffrey N.; Johnston, Carol E.

doi:10.1655/herpetologica-d-15-00026.1

Cited by 5 publications

(5 citation statements)

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“…The most notable aspect of newt underwater sounds is their high peak frequency. Values of mid-high frequency clicks are above known peak frequencies in other salamander taxa (Gehlbach & Walker, 1970; Wyman & Thrall, 1972; Davis & Brattstrom, 1975; Crovo, Zeyl & Johnston, 2016). Specifically, peak frequencies of underwater sounds in European taxa were about 4 kHz higher than in Amphiuma and more than 10 kHz higher than in other species.…”

Section: Discussionmentioning

confidence: 82%

“…Although underwater sound production has previously been reported in four families of caudate amphibians, i.e., Ambystomatidae, Proteidae, Salamandridae, and Sirenidae (Gehlbach & Walker, 1970; Wyman & Thrall, 1972; Davis & Brattstrom, 1975; Crovo, Zeyl & Johnston, 2016), our study is the first to analyze species, sex, and individual variation in this trait. Parameters of produced clicks highly overlapped between species and sexes.…”

Section: Discussionmentioning

confidence: 88%

“…Terrestrial salamanders produce low intensity sounds, such as hisses, clicks, or squeaks, when threatened, during mating or agonistic encounters. Some species produce underwater clicks, squeaks, or hissing sounds (Gehlbach & Walker, 1970; Wyman & Thrall, 1972; Davis & Brattstrom, 1975; Crovo, Zeyl & Johnston, 2016), for which the purpose is unknown. It may play a role in social interactions (Gehlbach & Walker, 1970; Davis & Brattstrom, 1975), in echolocation (Gehlbach & Walker, 1970), or are unintentional (Maslin, 1950).…”

Section: Introductionmentioning

confidence: 99%

“…Although caudate amphibians lack an ear opening and middle ear, this poses no limitation for their high frequency hearing underwater. Their ability to detect sounds covers wide frequency ranges (Bulog & Schlegel, 2000), whereas others reported declining underwater hearing abilities towards high frequencies (Crovo, Zeyl & Johnston, 2016; Zeyl & Johnston, 2016). Despite mixed information about the extent of underwater hearing in salamanders, their conspecific sound detection ability may depend not only on hearing capabilities but also on acoustic divergence between individuals, sexes, or species occupying the same habitat, similar to anurans (Littlejohn, 1977; Gerhardt & Schwartz, 1995; Leininger & Kelley, 2015; but see Amézquita et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Underwater sound production varies within not between species in sympatric newts

Hubácek

Šugerková

Gvoždı́k

2019

PeerJ

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Sound production is a widespread phenomenon among animals. Effective sound use for mate or species recognition requires some acoustic differentiation at an individual or species level. Several species of caudate amphibians produce underwater sounds, but information about intra- and interspecific variation in their acoustic production is missing. We examined individual, sex, and species variation in underwater sound production in adults of two sympatric newt taxa, Ichthyosaura alpestris and Lissotriton vulgaris. Individual newts produced simple low- (peak frequency = 7–8 kHz) and mid-high frequency (14–17 kHz) clicks, which greatly overlap between sexes and species. Individual differences explained about 40–50% of total variation in sound parameters. These results provide foundations for further studies on the mechanisms and eco-evolutionary consequences of underwater acoustics in newts.

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Underwater sound production varies within not between species in sympatric newts

Hubácek

Šugerková

Gvoždı́k

2019

PeerJ

View full text Add to dashboard Cite

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“…In contrast, the auditory pars inferior is known to demonstrate interspecific morphological variation indicating adaptation for auditory specialization, exemplified by variation in the elongation and coiling of the mammalian cochlea to support extended frequency ranges of acoustic sensitivity. Salamanders have an unspecialized, atympanic ear and are non-vocal in general (but see Gehlbach and Walker 1970;Thurow and Gould 1977;Brodie 1978;Crovo et al 2016); therefore, the salamander otic region is not expected to experience strong directional selection for auditory function. Under relaxed selection, the structures of the salamander ear may show somewhat random phenotypic variation, but are primarily expected to retain an unspecialized form.…”

Section: Discussionmentioning

confidence: 99%

Bony labyrinth morphometry reveals hidden diversity in lungless salamanders (Family Plethodontidae): Structural correlates of ecology, development, and vision in the inner ear

2019

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Lungless salamanders (Family Plethodontidae) form a highly speciose group that has undergone spectacular adaptive radiation to colonize a multitude of habitats. Substantial morphological variation in the otic region coupled with great ecological diversity within this clade make plethodontids an excellent model for exploring the ecomorphology of the amphibian ear. We examined the influence of habitat, development, and vision on inner ear morphology in 52 plethodontid species. We collected traditional and 3D geometric morphometric measurements to characterize variation in size and shape of the otic endocast and peripheral structures of the salamander ear. Phylogenetic comparative analyses demonstrate structural convergence in the inner ear across ecologically similar species. Species that dwell in spatially complex microhabitats exhibit robust, highly curved semicircular canals suggesting enhanced vestibular sense, whereas species with reduced visual systems demonstrate reduced canal curvature indicative of relaxed selection on the vestibulo‐ocular reflex. Cave specialists show parallel enlargement of auditory‐associated structures. The morphological correlates of ecology among diverse species reveal underlying evidence of habitat specialization in the inner ear and suggest that there exists physiological variation in the function of the salamander ear even in the apparent absence of selective pressures on the auditory system to support acoustic behavior.

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The role of freshwater bioacoustics in ecological research

et al. 2020

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Conventional methodologies used to estimate biodiversity in freshwater ecosystems can be nonselective and invasive, sometimes leading to capture and potential injury of vulnerable species. Therefore, interest in noninvasive surveying techniques is growing among freshwater ecologists. Passive acoustic monitoring, the noninvasive recording of environmental sounds, has been shown to effectively survey biota in terrestrial and marine ecosystems. However, knowledge of the sounds produced by freshwater species is relatively scarce. Furthermore, little is known about the representation of different freshwater taxonomic groups and habitat types within the literature. Here we present results of a systematic review of research literature on freshwater bioacoustics and identify promising areas of future research. The review showed that fish are the focal taxonomic group in 44% of published studies and were studied primarily in laboratory aquaria and lotic habitats. By contrast, lentic habitats and other taxonomic groups have received relatively little research interest. It is particularly striking that arthropods are only represented by 26% of studies, despite their significant contributions to freshwater soundscapes. This indicates a mismatch between the representation of taxonomic groups within the freshwater bioacoustic literature and their relative acoustic contribution to natural freshwater soundscapes. In addition, the review indicates an ongoing shift from behavioral studies, often with focus on a single taxonomic group, towards fieldbased studies using ecoacoustic approaches. On the basis of this review we suggest that future freshwater bioacoustics research should focus on passive acoustic monitoring and arthropod sound, which would likely yield novel insights into freshwater ecosystem function and condition.

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Hearing and Sound Production in the Aquatic Salamander, Amphiuma means

Cited by 5 publications

References 15 publications

Underwater sound production varies within not between species in sympatric newts

Underwater sound production varies within not between species in sympatric newts

Bony labyrinth morphometry reveals hidden diversity in lungless salamanders (Family Plethodontidae): Structural correlates of ecology, development, and vision in the inner ear

The role of freshwater bioacoustics in ecological research

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