On the Evolution of Acoustic Communication Systems in Vertebrates

Norris, Kenneth S.; Evans, Evan C.

doi:10.1007/978-1-4684-7493-0_71

Cited by 7 publications

(2 citation statements)

References 26 publications

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“…Selective advantages should accrue to juveniles in aquatic environments that are able to perceive the vocalizations of adults (Evans and Norris , Norris and Evans ). Solntseva () noted that unusual adaptations of the middle ears in cetaceans appear at early developmental stages.…”

Section: Results Of Mann‐whitney U Tests Comparing Juveniles and Adulmentioning

confidence: 99%

Precocial development within the tympanoperiotic complex in cetaceans

Lancaster

Ary

Krysl

et al. 2014

Marine Mammal Science

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At birth, obligatory aquatic mammals must be capable of independent locomotion, surfacing to breathe and maintaining contact with the mother. Precocial development in marine mammals has been described with respect to the importance of respiratory centers in the brain, sensory organs, and the neuromuscular integration of the locomotory system (Buhl and Oelschl€ ager 1988, Oelschl€ ager and Kemp 1998, Rauschmann et al. 2006. Hoyte (1961) found that the cavities of the cochlea, vestibule, and semicircular canals of rabbits were fully grown at birth, whereas the size of the tympanic bulla increased in diameter in the first 22 d of life. However, the systematic representation in previous studies is narrow, and only limited quantitative data on the growth of the middle ear have been reported. Here we present preliminary data on the relative size of the tympanic bulla in comparison to head and body size across a broad spectrum of cetaceans.We collected two data sets to address this question. Homologous measurements were made on skulls and tympanic bullae from 10 adults and 10 juveniles for Tursiops truncatus (Delphinidae) and Pontoporia blainvillei (Iniidae). In T. truncatus we selected animals that had age estimates based on gingival growth layers, and in P. blainvillei, individuals with known body weights. To reduce the effect of geographic variation, we selected specimens of T. truncatus that were categorized as being from either coastal or intermediate populations ranging from New Jersey to North Carolina. All specimens of P. blainvillei were from the population of the estuary of the Rio de la Plata. In order to consider this question in a broader taxonomic context, we 1 Corresponding author (wlancaster@csus.edu).

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Section: Results Of Mann‐whitney U Tests Comparing Juveniles and Adulmentioning

confidence: 99%

Precocial development within the tympanoperiotic complex in cetaceans

Lancaster

Ary

Krysl

et al. 2014

Marine Mammal Science

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“…To generate sound, animals must produce some sort of vibration using morphological structures. These vibrations may be generated in a number of ways, including percussion (Arcadi et al, 1998; Schaller, 1963), cavitation (Koukouvinis et al, 2017), and stridulation (Norris & Evans, 1988); however, many terrestrial air‐breathing animals produce vibrations for vocalization by forcing air from the respiratory system through a valve. In terrestrial mammals, this valve is called the glottis or vocal cords.…”

Section: Introductionmentioning

confidence: 99%

The roar of Rancho La Brea? Comparative anatomy of modern and fossil felid hyoid bones

Deutsch,

Brian Langerhans,

Flores

et al. 2023

Journal of Morphology

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Animal vocalization is broadly recognized as ecologically and evolutionarily important. In mammals, hyoid elements may influence vocalization repertoires because the hyoid apparatus anchors vocal tissues, and its morphology can be associated with variation in surrounding soft‐tissue vocal anatomy. Thus, fossil hyoid morphology has the potential to shed light on vocalizations in extinct taxa. Yet, we know little about the hyoid morphology of extinct species because hyoid elements are rare in the fossil record. An exception is found in the Rancho La Brea tar pits in Los Angeles, California, where enough hyoids have been preserved to allow for quantitative analyses. The La Brea Tar Pits and Museum houses one of the largest and most diverse collections of carnivore fossils, including hyoid elements from the extinct felids Smilodon fatalis and Panthera atrox. Here, we found that extant members of Felinae (purring cats) and Panthera (roaring cats) showed characteristic differences in hyoid size and shape that suggest possible functional relationships with vocalization. The two extinct taxa had larger and more robust hyoids than extant felids, potentially reflecting the ability to produce lower frequency vocalizations as well as more substantial muscles associated with swallowing and respiration. Based on the shape of the hyoid elements, Panthera atrox resembled roaring cats, while Smilodon fatalis was quite variable and, contrary to suggestions from previous research, more similar overall to purring felids. Thus P. atrox may have roared and S. fatalis may have produced vocalizations similar to extant purring cats but at a lower frequency. Due to the confounding of vocalization repertoire and phylogenetic history in extant Felidae, we cannot distinguish between morphological signals related to vocalization behavior and those related to shared evolutionary history unrelated to vocalization.

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Cetacean Acoustics

Au¹,

Lammers²

2007

Springer Handbook of Acoustics

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On the Evolution of Acoustic Communication Systems in Vertebrates

Cited by 7 publications

References 26 publications

Precocial development within the tympanoperiotic complex in cetaceans

Precocial development within the tympanoperiotic complex in cetaceans

The roar of Rancho La Brea? Comparative anatomy of modern and fossil felid hyoid bones

Cetacean Acoustics

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