Olfaction in Aquatic Vertebrates

Tierney, Keith B.

doi:10.1002/9781118971758.ch23

Cited by 34 publications

(9 citation statements)

References 170 publications

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“…In the olfactory organ of osteognathostome fish, singular mucus producing goblet cells are scattered throughout the nonsensory nasal epithelia (Byrd & Brunjes, ), but no evidence of OBPs or the like has been provided yet. Contrary to the generally accepted assumption that glandular secretions containing odorant binding proteins are not essential for fish olfaction (Tierney, ), our findings give rise to another hypothesis: specialised glandular structures seem to be involved in the olfactory mechanisms of the lungfish accessory olfactory system: in the nonsensory portions of the crypts of both investigated species, groups of elongated alcian blue‐positive cells (particularly strongly stained in L. paradoxa ) can be observed. These glandular cells have already been suggested to participate in the olfactory process of the epithelial crypt sensory cells (Nakamuta et al, ).…”

Section: Discussioncontrasting

confidence: 99%

“…These observations give rise to the hypothesis that waterborne chemical stimuli within the nasal cavity may be captured at the crypt entrance (by binding protein‐containing mucus) and transported via bands of motile cilia towards the sensory surface inside the crypt. The use of cilia in order to obtain a targeted water flow through the olfactory organ has been described in different fish species (Døving, ; Tierney, ). Furthermore, lungfish exhibit a characteristic sniffing behaviour, accompanied by a buccal pumping mechanism, which also causes an extension of the nasal sac (Derivot, ; Derivot, Mattei, Godet, & Dupé, ).…”

Section: Discussionmentioning

confidence: 99%

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Epithelial crypts: A complex and enigmatic olfactory organ in African and South American lungfish (Lepidosireniformes, Dipnoi)

Wittmer

Nowack

2017

Journal of Morphology

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African lungfish (Protopterus) seem unique among osteognathostomes in possessing a potential vomeronasal organ homolog in form of accessory epithelial crypts within their nasal cavity. Many details regarding structural and functional properties of these crypts are still unexplored. In this study, we reinvestigate the issue and also present the first data on epithelial crypts in the South American lungfish Lepidosiren paradoxa. The nasal cavities of L. paradoxa and Protopterus annectens were studied using histology, scanning electron microscopy, and alcian blue and PAS staining. In both species, the epithelial crypts consist of a pseudostratified sensory epithelium and a monolayer of elongated glandular cells, in accordance with previously published data on Protopterus. In addition, we found a new second and anatomically distinct type of mucous cell within the duct leading into the crypt. These glandular duct cells are PAS positive, whereas the elongated glandular cells are stainable with alcian blue, suggesting distinct functions of their respective secretions. Furthermore, the two lungfish species show differently structured crypt sensory epithelia and external crypt morphology, with conspicuous bilaterally symmetrical stripes of ciliated cells in L. paradoxa. Taken together, our data suggest that stimulus transport into the crypts involves both ciliary movement and odorant binding mucus.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Epithelial crypts: A complex and enigmatic olfactory organ in African and South American lungfish (Lepidosireniformes, Dipnoi)

Wittmer

Nowack

2017

Journal of Morphology

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“…In fish, the projections of the diverse types of ORNs reach different sectors of the olfactory bulb, although there is also evidence that a small subpopulation of ORNs projects directly to the ventral region of the telencephalon (Hara & Zielinski, 2007; Tierney, 2015). Electrophysiological studies in trout and channel catfish have confirmed that different types of odorants are processed in different parts of the olfactory bulb, generating a gross general odotopy (Friedrich & Korsching, 1997; Hara & Zhang, 1998; Nikonov & Caprio, 2004; Nikonov & Caprio, 2005; Nikonov, Finger & Caprio, 2005; Rolen & Caprio, 2007).…”

Section: Introductionmentioning

confidence: 99%

An update on anatomy and function of the teleost olfactory system

Olivares

Schmachtenberg

2019

PeerJ

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About half of all extant vertebrates are teleost fishes. Although our knowledge about anatomy and function of their olfactory systems still lags behind that of mammals, recent advances in cellular and molecular biology have provided us with a wealth of novel information about the sense of smell in this important animal group. Its paired olfactory organs contain up to five types of olfactory receptor neurons expressing OR, TAAR, VR1- and VR2-class odorant receptors associated with individual transduction machineries. The different types of receptor neurons are preferentially tuned towards particular classes of odorants, that are associated with specific behaviors, such as feeding, mating or migration. We discuss the connections of the receptor neurons in the olfactory bulb, the differences in bulbar circuitry compared to mammals, and the characteristics of second order projections to telencephalic olfactory areas, considering the everted ontogeny of the teleost telencephalon. The review concludes with a brief overview of current theories about odor coding and the prominent neural oscillations observed in the teleost olfactory system.

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Section: Olfactory Coding In Teleostsmentioning

confidence: 99%

Peer Review #2 of "An update on anatomy and function of the teleost olfactory system (v0.1)"

Manzini¹

2019

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About half of all extant vertebrates are teleost fishes. Although our knowledge about anatomy and function of their olfactory systems still lags behind that of mammals, recent advances in cellular and molecular biology have provided us with a wealth of novel information about the sense of smell in this important animal group. Its paired olfactory organs contain up to five types of olfactory receptor neurons expressing OR, TAAR, VR1and VR2-class odorant receptors associated with individual transduction machineries. The different types of receptor neurons are preferentially tuned towards particular classes of odorants, that are associated with specific behaviors, such as feeding, mating or migration. We discuss the connections of the receptor neurons in the olfactory bulb, the differences in bulbar circuitry compared to mammals, and the characteristics of second order projections to telencephalic olfactory areas, considering the everted ontogeny of the teleost telencephalon. The review concludes with a brief overview of current theories about odor coding and the prominent neural oscillations observed in the teleost olfactory system.

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Olfaction in Aquatic Vertebrates

Cited by 34 publications

References 170 publications

Epithelial crypts: A complex and enigmatic olfactory organ in African and South American lungfish (Lepidosireniformes, Dipnoi)

Epithelial crypts: A complex and enigmatic olfactory organ in African and South American lungfish (Lepidosireniformes, Dipnoi)

An update on anatomy and function of the teleost olfactory system

Peer Review #2 of "An update on anatomy and function of the teleost olfactory system (v0.1)"

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