Hearing in Nonarthropod Invertebrates

Budelmann, Bernd U.

doi:10.1007/978-1-4612-2784-7_10

Cited by 78 publications

(101 citation statements)

References 64 publications

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“…The cephalopod statocyst is an inertial accelerometer, which contains a dense statolith attached to sensory hair cells [21][22][23][24][25][26] . When vulgaris are benthic species that initially freeze when threatened 16) .…”

Section: Discussionmentioning

confidence: 99%

Behavioral Responses to Underwater Sound in the Small Benthic Octopus Octopus ocellatus

Kaifu

Segawa

Tsuchiya

2007

J. Marine Acoust. Soc. Jpn.

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Section: Discussionmentioning

confidence: 99%

Behavioral Responses to Underwater Sound in the Small Benthic Octopus Octopus ocellatus

Kaifu

Segawa

Tsuchiya

2007

J. Marine Acoust. Soc. Jpn.

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“…In contrast to most invertebrate sensory systems, vertebrate hair cells are connected to the central nervous system (CNS) via separate neurons grouped into distinct ganglia (Fritzsch, 1988b). Among invertebrates, such sensory cells without axons exist also in some cephalopods (Budelmann, 1992). Among cephalochordates, sensory cells without axons have been described for the lancelet, a likely vertebrate ancestor (Conway Morris, 2000) and ascidians (Burighel et al, 2003).…”

Section: Evolution Of the Ear: Molecular Origin Of Mechanosensorymentioning

confidence: 99%

“…Interestingly, some Mollusca, but not insects, have separate sensory cells and sensory neurons (Budelmann, 1992). Thus, neurotrophin-mediated cell survival may have evolved in conjunction with the bHLH gene recruitment to distinct sensory neuron formation.…”

Section: Fit the Increasing Complexity Of Ear Developmentmentioning

confidence: 99%

Molecular Conservation and Novelties in Vertebrate Ear Development

Fritzsch

Beisel

2003

Current Topics in Developmental Biology

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Evolution shaped the vertebrate ear into a complicated three-dimensional structure and positioned the sensory epithelia so that they can extract specific aspects of mechanical stimuli to govern vestibular and hearing-related responses of the whole organism. This information is conducted from the ear via specific neuronal connections to distinct areas of the hindbrain for proper processing. During development, the otic placode, a simple sheet of epidermal cells, transforms into a complicated system of ducts and recesses. This placode also generates the mechanoelectrical transducers, the hair cells, and sensory neurons of the vestibular and cochlear (spiral) ganglia of the ear. We argue that ear development can be broken down into dynamic processes that use a number of known and unknown genes to govern the formation of the threedimensional labyrinth in an interactive fashion. Embedded in this process, but in large part independent of it, is an evolutionary conserved process that induces early the development of the neurosensory component of the ear. We present molecular data suggesting that this later process is, in its basic aspects, related to the mechanosensory cell formation across phyla and is extremely conserved at the molecular level. We suggest that sensory neuron development and maintenance are vertebrate or possibly chordate novelties and present the molecular data to support this notion.

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“…The hair cells of the maculae are also polarized (Budelmann, 1979). In addition to linear and angular acceleration, squid can detect, and be affected by, the particle motion component of sound, with the statocyst effectively acting as an accelerometer and a simple auditory system (Packard et al, 1990;Budelmann et al, 1992;Mooney et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…The statocyst is analogous to the fish otolith system (Fay, 1974) and, to some extent, may share functions of the inner ear hair cells of higher vertebrates (Yost, 1994). Because squid are now considered to respond to some acoustic components, there is concern that increases in ocean noise may damage statocyst hair cells and impact their hearing (Packard et al, 1990;Budelmann et al, 1992;Kaifu et al, 2008;Hu et al, 2009;André et al, 2011;Mooney et al, 2012;Solé et al, 2013). Additionally, squid have been a model species in physiology and neuroscience since the classic experiments by Hodgkin and Huxley on the nature of the action potential Huxley, 1945, 1952), and their use is growing in other areas such as the study of camouflage and animal-bacterial symbioses (Hanlon, 2007;Lee et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Aminoglycoside-Induced Damage in the Statocyst of the Longfin Inshore Squid, Doryteuthis pealeii

Scharr

Mooney

Schweizer

et al. 2014

The Biological Bulletin

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Abstract. Squid are a significant component of the marine biomass and are a long-established model organism in experimental neurophysiology. The squid statocyst senses linear and angular acceleration and is the best candidate for mediating squid auditory responses, but its physiology and morphology are rarely studied. The statocyst contains mechano-sensitive hair cells that resemble hair cells in the vestibular and auditory systems of other animals. We examined whether squid statocyst hair cells are sensitive to aminoglycosides, a group of antibiotics that are ototoxic in fish, birds, and mammals. To assess aminoglycoside-induced damage, we used immunofluorescent methods to image the major cell types in the statocyst of longfin squid (Doryteuthis pealeii). Statocysts of live, anesthetized squid were injected with either a buffered saline solution or neomycin at concentrations ranging from 0.05 to 3.0 mmol l Ϫ1 . The statocyst hair cells of the macula statica princeps were examined 5 h post-treatment. Anti-acetylated tubulin staining showed no morphological differences between the hair cells of saline-injected and non-injected statocysts. The hair cell bundles of the macula statica princeps in aminoglycoside-injected statocysts were either missing or damaged, with the amount of damage being dose-dependent. The proportion of missing hair cells did not increase at the same rate as damaged cells, suggesting that neomycin treatment affects hair cells in a nonlethal manner. These experiments provide a reliable method for imaging squid hair cells. Further, aminoglycosides can be used to induce hair cell damage in a primary sensory area of the statocyst of squid. Such results support further studies on loss of hearing and balance in squid.

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Hearing in Nonarthropod Invertebrates

Cited by 78 publications

References 64 publications

Behavioral Responses to Underwater Sound in the Small Benthic Octopus Octopus ocellatus

Behavioral Responses to Underwater Sound in the Small Benthic Octopus Octopus ocellatus

Molecular Conservation and Novelties in Vertebrate Ear Development

Aminoglycoside-Induced Damage in the Statocyst of the Longfin Inshore Squid, Doryteuthis pealeii

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