Gross Morphology and Evolution of the Mechanoreceptive Lateral-Line System in Teleost Fishes (Part 2 of 2)

Webb, Jacqueline F.

doi:10.1159/000316061

Cited by 10 publications

(16 citation statements)

References 30 publications

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“…Still, not much is known about the specific details of this hypertrophy. In general, these organs develop during the larval stages and lose the ability to regenerate during ontogenesis45. The cupula can grow continuously, to replace the wear of the terminal portion678; however, the detached structures that we report here vary in number according to fish size and also temporally.…”

mentioning

confidence: 79%

Novel structure in sciaenid fish skulls indicates continuous production of the cephalic neuromast cupula

Pombo

Turra

2016

Sci Rep

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The presence of a conspicuous and frequent but never-described structure in the skull cavities of sciaenid fish was noted during population studies in an urbanized bay. The ultrastructure closely resembles the cupula of neuromasts, an organ associated with the perception of the environment in teleost fish. The bodies were recorded detached in both preserved and freshly sampled individuals and without associated cilia. Prominent characteristics are acellularity, the elliptic-conic shape composed of stack-like protein lamellas, and a mesh-like appearance in cross section. These acellular lamellar cephalic bodies (ALCBs) were more abundant in larger individuals and showed temporal peaks of abundance independently of the fish size. The conic and lamellar features suggest that the deposition of protein layers follows fish growth, and the bimodality of the size of these structures in individuals indicates temporal peaks of production. These results indicate that these ALCBs are a consequence of the accretion of the cupula of neuromasts at a faster rate than they degrade. Given the novelty of this structure and the increasing records of diseases of marine organisms worldwide, an important question is whether these bodies occur subsequently to some environmental change and whether their accumulation in the skull cavities has consequences to fish health.

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mentioning

confidence: 79%

Novel structure in sciaenid fish skulls indicates continuous production of the cephalic neuromast cupula

Pombo

Turra

2016

Sci Rep

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“…The lateral line is sensory that allows fish to sense objects and motion in their local environment (Wark and Peichel, 2010). The lateral line always contains mechanoreceptors and often, but not always, electroreceptors (Webb, 1989). The lateral line divided into two subsystems; mechanoreceptive neuromasts and electroreceptive ampullary and tuberous organs.…”

Section: Discussionmentioning

confidence: 99%

“…The epidermis comprised of stratified aquamous epithelium with many malpigian, club and mucus cells and the dermis composed of stratum adiposum or spongiosum and compactum (El Zoghby et al, 2016). The lateral line system always contains mechanoreceptors and often electroreceptors (Webb, 1989). The superficial neuromasts contained few hair and support cell and were smaller than canal neuromasts (Northcutt and Bleckmann, 1993), while Dijkgraaf (1963) stated that the superficial neuromasts distinguished within canal neuromasts or on papillae and they appeared by projections of cupula whether they were in grooves or pits.…”

Section: Introductionmentioning

confidence: 99%

Micro-Morphological investigation of the Skin of the Larval and Adult Stages of the African Catfish (Clarias gariepinus)

Derbalah¹,

El‐Gendy²,

Alsafy³

et al. 2017

AJVS

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Key words: Catfish, Skin, Immunohistochemistry, SEM, TEM The current study aimed to explore the skin sructure at the larval and adult stages of the African catfish. Of the previous studies on the skin morphology of fish, none has researched the detailed skin differentiation at the larval and adult stages of the African catfish. Here by light microscopic investigation, the skin of the larva after hatching consisted of two layers of simple squamous epithelium. The skin of the 5-6 day old larva consisted of more than one layer of flattened to oval cells, continuous layer of melanocytes and club cells showed up. The skin of the 15-days old larva distinguished into epidermis, dermis and hypodermis. While the skin of the adult catfish, the epidermis consisted of three layers a basal layer of cuboidal or columnar cells, middle layer of polyhedral cells and surface layer of flattened cells. Its mucous cells were oval in shape having foamy cytoplasm. Its club cells had acidophilic cytoplasm and some cells were binucleated. At the lateral line, a group of elongated neuromasts viewed between the club cells. Langerhans like cell showed a positive reaction with CD 1a. The dermis divided into stratum spongiusm and stratum compactum. At lateral line beneath the hypodermis, the neuromast canal detected. By SEM, no any evidence of taste buds pores and neuromast detected at the newly hatched larva. Different forms of neuromast appeared on the surface as small epidermal protrusions at the 6-day old larva. In addition, the neuromast at the epidermal protrusion appeared with long and short hair bundles. While, the skin of the adult catfish, the surface epithelium showed many projections, the broken epidermis showed a large club cells, melanocytes with cytoplasmic processes and pores. By TEM of the adult catfish, the surface cells had (microridges), desmosomes distinguished between the neighboring epidermal surface cells. The club cells cytoplasm had scanty organelles, two types of club cells identified; the first type with no vesicular secretion and the second type with fibrillar cytoplasm. The plasma membrane showed many invaginations. The study recorded two types of neuromast; superficial neuromast and canal neuromast set in the dermis. No neurmast detected at the 1 st day larva afterthat it appeared and incresead in number and its shape changed from simillar hair cells to long and short hair bundles.

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“…These neuromasts are located either on the skin surface of the fish (superficial neuromasts) or in bony canals embedded within the dermis (canal neuromasts; Fig. 1) (Webb, 1989). Water movements near the fish's skin surface cause the cupula to be deflected by viscous drag, opening mechanotransduction channels on the stereovilli to depolarize the sensory hair cells and generate neural action potentials (reviewed in van Netten and McHenry, 2014).…”

Section: What Is the Lateral Line System?mentioning

confidence: 99%

“…With >30,000 species of fishes, there is huge diversity in lateral line localization and morphology, which can have functional implications (Webb, 1989(Webb, , 2014. Canal morphology (i.e.…”

Section: Future Researchmentioning

confidence: 99%

Mechanosensory signaling as a potential mode of communication during social interactions in fishes

Butler

Maruska

2016

Journal of Experimental Biology

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Signals produced during social interactions convey crucial information about the sender's identity, quality, reproductive state and social status. Fishes can detect near-body water movements via the mechanosensory lateral line system, and this sense is used during several common fish behaviors, such as schooling, rheotaxis and predator-prey interactions. In addition, many fish behaviors, such as aggressive lateral displays and reproductive body quivers, involve fin and body motions that generate water movements that can be detected by the lateral line system of nearby fish. This mechanosensory system is well studied for its role in obstacle avoidance and detection of inadvertent hydrodynamic cues generated during schooling and predator-prey interactions; however, little research has focused on the role of mechanosensory communication during social interactions. Here, we summarize the current literature on the use of mechanosensation-mediated behaviors during agonistic and reproductive encounters, as well as during parental care. Based on these studies, we hypothesize that mechanosensory signaling is an important but often overlooked mode of communication during conspecific social interactions in many fish species, and we highlight its importance during multimodal communication. Finally, we suggest potential avenues of future research that would allow us to better understand the role of mechanosensation in fish communication.

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Gross Morphology and Evolution of the Mechanoreceptive Lateral-Line System in Teleost Fishes (Part 2 of 2)

Cited by 10 publications

References 30 publications

Novel structure in sciaenid fish skulls indicates continuous production of the cephalic neuromast cupula

Novel structure in sciaenid fish skulls indicates continuous production of the cephalic neuromast cupula

Micro-Morphological investigation of the Skin of the Larval and Adult Stages of the African Catfish (Clarias gariepinus)

Mechanosensory signaling as a potential mode of communication during social interactions in fishes

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