Otolith regularities

Lychakov, D. V.; Rebane, Yu. T.

doi:10.1016/s0378-5955(00)00026-5

Cited by 95 publications

(104 citation statements)

References 55 publications

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“…To simulate the mechanics of CO 2 -altered otoliths, we applied the size and relative density data from sagittal otoliths in our experiment to a mathematical model of otolith motion in response to an 0.8-nm amplitude sinusoidal acoustic wave (27,28). Our simulation demonstrated that when subjected to the same sound stimulus, the estimated CO 2 -driven increase in relative otolith mass results in an increased displacement amplitude compared with control otoliths (Fig.…”

Section: Resultsmentioning

confidence: 94%

“…Alteration of otolith size, density, and mass has direct impacts on otolith mechanics and influences sensory function (27)(28)(29). To simulate the mechanics of CO 2 -altered otoliths, we applied the size and relative density data from sagittal otoliths in our experiment to a mathematical model of otolith motion in response to an 0.8-nm amplitude sinusoidal acoustic wave (27,28).…”

Section: Resultsmentioning

confidence: 99%

“…The need for auditory or vestibular sensitivity may also be life history specific. Many bottom dwelling fish species possess large otoliths relative to their body size, which may indicate an ecological need for high auditory and vestibular sensitivity (28). In contrast, highly mobile pelagic species often possess small otoliths relative to their body size, implying less sensitivity (28).…”

Section: Resultsmentioning

confidence: 99%

“…Many bottom dwelling fish species possess large otoliths relative to their body size, which may indicate an ecological need for high auditory and vestibular sensitivity (28). In contrast, highly mobile pelagic species often possess small otoliths relative to their body size, implying less sensitivity (28). Because these traits have likely evolved to suit the particular ecological needs of a species, benthic species may find increased otolith mass advantageous, whereas such changes may be detrimental for pelagic species.…”

Section: Resultsmentioning

confidence: 99%

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Ocean acidification alters the otoliths of a pantropical fish species with implications for sensory function

Bignami¹,

Enochs

Manzello

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

125

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Ocean acidification affects a wide diversity of marine organisms and is of particular concern for vulnerable larval stages critical to population replenishment and connectivity. Whereas it is well known that ocean acidification will negatively affect a range of calcareous taxa, the study of fishes is more limited in both depth of understanding and diversity of study species. We used new 3D microcomputed tomography to conduct in situ analysis of the impact of ocean acidification on otolith (ear stone) size and density of larval cobia (Rachycentron canadum), a large, economically important, pantropical fish species that shares many life history traits with a diversity of high-value, tropical pelagic fishes. We show that 2,100 μatm partial pressure of carbon dioxide (pCO 2 ) significantly increased not only otolith size (up to 49% greater volume and 58% greater relative mass) but also otolith density (6% higher). Estimated relative mass in 800 μatm pCO 2 treatments was 14% greater, and there was a similar but nonsignificant trend for otolith size. Using a modeling approach, we demonstrate that these changes could affect auditory sensitivity including a ∼50% increase in hearing range at 2,100 μatm pCO 2 , which may alter the perception of auditory information by larval cobia in a high-CO 2 ocean. Our results indicate that ocean acidification has a graded effect on cobia otoliths, with the potential to substantially influence the dispersal, survival, and recruitment of a pelagic fish species. These results have important implications for population maintenance/replenishment, connectivity, and conservation efforts for other valuable fish stocks that are already being deleteriously impacted by overfishing. P resent day atmospheric CO 2 concentration is higher than at any point in the past 800,000 y (1), driving unprecedented anthropogenic ocean acidification in pelagic (2) and coastal environments (3). Future climate scenarios project further decline in ocean pH (4-6) at a rate of change faster than any experienced in the last 300 million years (7). Although ocean acidification is known to influence a diversity of marine organisms (8), it is a particular concern for vulnerable larval stages critical to population replenishment and connectivity (9). Recently, the impact of ocean acidification on the larval stages of invertebrate and vertebrate marine species has attracted increased attention; however, experiments on larval fishes raised under projected ocean acidification scenarios have produced mixed results (10, 11). The days-to month-long pelagic larval period is an ecologically vital ontogenetic phase in marine fishes because it constitutes the primary mode of dispersal in many species (9) and represents the life stage most susceptible to mortality (12). During this phase, the sensory abilities of larval fishes are important determinants of survival (13) and ultimately influence the persistence of viable populations. Therefore, the study of ocean acidification impacts on sensory function in fishes is of critical imp...

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Ocean acidification alters the otoliths of a pantropical fish species with implications for sensory function

Bignami¹,

Enochs

Manzello

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

125

View full text Add to dashboard Cite

show abstract

“…These "ear rocks" are initially dome-like in structure (Fig. 1D), but will, with age, take on complex shapes consistent with the shape of the underlying sensory maculae, and with the biophysical requirements of each maculae for the sensing of motion and sound (Das, 1994;Lychakov and Rebane, 2000). Otolith formation begins with the aggregation of free-floating protein core particles, identifiable at 18-20 h post-fertilization (hpf).…”

Section: Structure and Development Of The Otoconial And Otolithic Memmentioning

confidence: 99%

Mixing model systems: Using zebrafish and mouse inner ear mutants and other organ systems to unravel the mystery of otoconial development

Hughes

Thalmann

et al. 2006

Brain Research

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Human vestibular dysfunction is an increasing clinical problem. Degeneration or displacement of otoconia is a significant etiology of age-related balance disorders and Benign Positional Vertigo (BPV). In addition, commonly used antibiotics, such as aminoglycoside antibiotics, can lead to disruption of otoconial structure and function. Despite such clinical significance, relatively little information has been compiled about the development and maintenance of otoconia in humans. Recent studies in model organisms and other mammalian organ systems have revealed some of the proteins and processes required for the normal biomineralization of otoconia and otoliths in the inner ear of vertebrates. Orchestration of extracellular biomineralization requires bringing together ionic and proteinaceous components in time and space. Coordination of these events requires the normal formation of the otocyst and sensory maculae, specific secretion and localization of extracellular matrix proteins, as well as tight regulation of the endolymph ionic environment. Disruption of any of these processes can lead to the formation of abnormally shaped, or ectopic, otoconia, or otoconial agenesis. We propose that normal generation of otoconia requires a complex temporal and spatial control of developmental and biochemical events. In this review, we suggest a new hypothetical model for normal otoconial and otolith formation based on matrix vesicle mineralization in bone which we believe to be supported by information from existing mutants, morphants, and biochemical studies.

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Interspecific Variations of Inner Ear Structure in the Deep‐Sea Fish Family Melamphaidae

Deng

Wagner

Popper

2013

The Anatomical Record

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Inner ear structures are compared among three major genera of the deep-sea fish family Melamphaidae (bigscales and ridgeheads). Substantial interspecific variation is found in the saccular otoliths, including the presence of a unique otolithic "spur" in the genera Melamphaes and Poromitra. The variation in the saccular otolith is correlated with an increase in the number of hair bundle orientation groups on the sensory epithelia from the genera Scopelogadus to Poromitra to Melamphaes. The diverse structural variations found in the saccule may reflect the evolutionary history of these species. The sensory hair cell bundles in this family have the most variable shapes yet encountered in fish ears. In the saccule, most of the hair bundles are 15-20 lm high, an exceptional height for fish otolithic end organs. These bundles have large numbers of stereovilli, including some that reach the length of the kinocilium. In the utricle, the striolar region separates into two unusually shaped areas that have not been described in any other vertebrates. The brains in all species have a relatively small olfactory bulb and optic tectum, as well as an enlarged posterior cerebellar region that is likely to be involved in inner ear and lateral line (octavolateral) functions. Data from melamphaids support the hypothesis that specialized anatomical structures are found in the ears of some (if not most) deep-sea fishes, presumably enhancing their hearing sensitivity.

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Otolith regularities

Cited by 95 publications

References 55 publications

Ocean acidification alters the otoliths of a pantropical fish species with implications for sensory function

Ocean acidification alters the otoliths of a pantropical fish species with implications for sensory function

Mixing model systems: Using zebrafish and mouse inner ear mutants and other organ systems to unravel the mystery of otoconial development

Interspecific Variations of Inner Ear Structure in the Deep‐Sea Fish Family Melamphaidae

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