Micro‐ and macro‐morphology of the olfactory organ of <i>Syngnathus typhle</i> (Syngnathidae, Actinopterygii)

Dymek, Jakub; Rosenqwist, Gunilla; Kuciel, Michał; Lauriano, Eugenia Rita; Capillo, Gioele; Zaccone, Giacomo; Żuwała, Krystyna

doi:10.1111/azo.12328

Cited by 8 publications

(6 citation statements)

References 53 publications

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“…The smallest olfactory repertoires occur in ocean sunfish Mola mola (28 genes) and broad-nosed pipefish Syngnathus typhle (35 genes). These extreme reductions of olfactory receptor diversity evolved independently and in parallel with the simplification of the olfactory organ, which is a small, flat olfactory epithelium in both species [10,23] (Fig. 2A).…”

Section: Coevolution Of Olfactory Organ and Olfactory Gene Repertoirementioning

confidence: 99%

Coevolution of the olfactory organ and its receptor repertoire in ray-finned fishes

et al. 2022

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Background Ray-finned fishes (Actinopterygii) perceive their environment through a range of sensory modalities, including olfaction. Anatomical diversity of the olfactory organ suggests that olfaction is differentially important among species. To explore this topic, we studied the evolutionary dynamics of the four main gene families (OR, TAAR, ORA/VR1 and OlfC/VR2) coding for olfactory receptors in 185 species of ray-finned fishes. Results The large variation in the number of functional genes, between 28 in the ocean sunfish Mola mola and 1317 in the reedfish Erpetoichthys calabaricus, is the result of parallel expansions and contractions of the four main gene families. Several ancient and independent simplifications of the olfactory organ are associated with massive gene losses. In contrast, Polypteriformes, which have a unique and complex olfactory organ, have almost twice as many olfactory receptor genes as any other ray-finned fish. Conclusions We document a functional link between morphology of the olfactory organ and richness of the olfactory receptor repertoire. Further, our results demonstrate that the genomic underpinning of olfaction in ray-finned fishes is heterogeneous and presents a dynamic pattern of evolutionary expansions, simplifications, and reacquisitions.

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Section: Coevolution Of Olfactory Organ and Olfactory Gene Repertoirementioning

confidence: 99%

Coevolution of the olfactory organ and its receptor repertoire in ray-finned fishes

et al. 2022

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“…Size and often the number of lamellae increase during fish development up to maturity. Some fish do not possess olfactory rosettes and the olfactory epithelium lines walls of the olfactory chamber, for example, in syngnathids (Dymek et al ., 2020) and mudskippers (Kuciel, Zuwala & Jakubowski, 2011; Kuciel, Zuwała & Satapoomin, 2013).…”

Section: Introductionmentioning

confidence: 99%

Structural diversity of olfactory organs in Osteoglossiformes

2020

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Osteoglossomorpha, an ancient Teleostei group, exhibits many ancestral structural features. Herein, we describe the diversity in morphology of olfactory organs of air-breathing Pantodon buchholzi, Arapaima gigas, and Gymnarchus niloticus in terms of adaptations to short ventures out of water and compare the results with the water-breathing Osteoglossum bicirrhosum. We demonstrate the presence of olfactory rosettes within the olfactory chamber in all studied species and additionally a peculiar cudgel-shaped structure in P. buchholzi. The typical olfactory rosette with centrally located elongate median raphe and two rows of olfactory lamellae was found only in P. buchholzi. In A. gigas, the olfactory lamellae arranged in semicircular manner were merged to small median raphe. Osteoglossum bicirrhosum and G. niloticus lacked median raphe, while the olfactory lamellae were ordered nearly parallel or circular, respectively. Olfactory epithelium lining the olfactory lamellae was unfolded only in P. buchholzi and G. niloticus. In contrast, in O. bicirrhosum and A. gigas convexities formed by nonsensory cells and concavities made by the sensory component were observed. Among the olfactory sensory neurons, ciliated and microvillus neurons were found in all studied species. Crypt-like cells were noted only in P. buchholzi, whereas rod-like cells were unique for A. gigas. The substantial morphological variation of the olfactory organ structure and ultrastructure in the studied osteoglossiforms may be explained by the early division of Osteoglossomorpha within Teleostei and long-term, independent evolution within the families.

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“…the Siluriformes, such as white catfish (Ameiurus catus) and wels catfish (Silurus glanis); and the Characiformes, such as red-bellied piranha (Pygocentrus nattereri) and Mexican tetra (Astyanax mexicanus; Dymek et al, 2020;Fishelson, 1997;Hara, 1975;Lazzari et al, 2014;Teichmann, 1954;Yamamoto & Ueda, 1979). More comparative data are clearly needed before we can understand the evolution of sensory systems in teleosts.…”

Section: Discussionmentioning

confidence: 99%

The role of visual and olfactory cues in social decisions of guppies and zebrafish

Santacà

Dadda

Bisazza

2021

Preprint

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Vision and olfaction are expensive to maintain, and in many taxa there appears to be a trade-off in investment between the two sensory systems. Previous work has suggested that guppies (Poecilia reticulata) and zebrafish (Danio rerio) may differ in the relative importance they place on these two senses in social interactions. In this study, we directly examined this issue by experimentally contrasting olfactory and visual information in social situations. In the first experiment, we found that guppies spent more time where conspecifics were visible than where they could smell them. On the contrary, zebrafish spent significantly more time in an empty compartment containing smell of conspecifics than in a compartment in which they only saw them. The difference was not large, suggesting that both species integrate various types of information to locate a nearby shoal. In two subsequent experiments, we studied the role of vision and smell in the discrimination of the quality of the social group, namely the number and the familiarity of its members. Zebrafish and guppies were confirmed to rely on different senses to estimate the size of a social group, whereas they did not differ in the discrimination of familiar and non-familiar conspecifics which appears to be based equally on the two senses. Similarly to what happens in other vertebrate clades, we suggest that, among teleosts, there are large differences in the relative importance of the different senses in the perception of the external world.

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Micro‐ and macro‐morphology of the olfactory organ of Syngnathus typhle (Syngnathidae, Actinopterygii)

Cited by 8 publications

References 53 publications

Coevolution of the olfactory organ and its receptor repertoire in ray-finned fishes

Coevolution of the olfactory organ and its receptor repertoire in ray-finned fishes

Structural diversity of olfactory organs in Osteoglossiformes

The role of visual and olfactory cues in social decisions of guppies and zebrafish

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