Histology and morphometry of the skin of the trident goby Tridentiger brevispinis (Perciformes, Gobiidae)

Abstract

The Korean trident goby, Tridentiger brevispinis, lives in adverse habitats that can easily become hypoxic due to low precipitation, regional dry periods, and high amounts of solar radiation. Histological and morphometric studies revealed the goby’s specialized skin (35.4–150.0 μm in thickness), consisting of an epidermis and dermis. The thicker epidermis comprises an outermost surface layer (having taste buds, stratified flattened cells, mucous cells, pigment cells, and stratified polygonal cells), middle layer (having stratified polygonal cells), and stratum germinativum (stratified columnar cells). In particular, the dermis has scales, well-developed vascularization, and a few blood capillaries just above the basement membrane, and a reduced diffusion distance was present in the lateral body. Consequently, adaptations such as thicker epidermis, well-developed vascularization, few blood capillaries, and a reduced diffusion distance may provide cutaneous respiration for survival in poorly oxygenated water during the periodic dry season.

Histology and morphometry of the skin of purple spaghetti-eel Moringua raitaborua (Anguilliformes, Moringuidae)

“…These ndings support the presence of more MC s of the operculum of M. raitaborua, which feeds on burrowing sh or invertebrates living in the sand and dig into bottom substrate using its head as ecology, at least in genus Moringua (Smith, 1997). Kim, 2022). In this study, M. raitaborua showed reduced diffusion distance (268.8 ± 58.7 µm), which was similar to and affected strongly by ET (covariance, P < 0.001) in all skin regions, indicating that capillaries of M. raitaborua can get close to the basement membrane of the SL.…”

“…This percentage rises to 50% in amphibious mudskippers, which spend much of their lives in air (Graham, 2011). Teleosts have histologically adapted skin to allow for cutaneous respiration through the following mechanisms (Beon et al, 2013;Glover et al, 2013;Kim, 2022): a thicker epidermis with diverse gland and large cells; the presence of intraepithelial blood capillaries; a de ned lymphatic space at the basal layer of epidermis; well-vascularized connective tissue, an absence of scales; and other speci c multicellular adaptations related to gas exchange.…”

“…With such environmental conditions, brackish water-dwelling shes are exposed to considerable skin stress that requires physiological tolerance of rapid changes in salinity, dissolved oxygen levels, pH, and water volume (Hu and Cai, 2013;Robbins and Lisle, 2018). While researching the histology of shes inhabiting intertidal pools and estuarine standing water, dermal vascularization (as in Rhinogobius brunneus and Tridentiger brevispinis) was found in the skin of M. raitaborua (Kim, 2022;. This study aims to describe the skin structure and analyze the morphometry of the epidermal thickness and diffusion distance of M. raitaborua, along with their relevance to cutaneous respiration.…”

Histology and morphometry of the skin of purple spaghetti-eel Moringua raitaborua (Anguilliformes, Moringuidae)

“…This percentage rises to 50% in amphibious mudskippers, which spend much of their lives in air (Graham 2011 ). Teleosts have histologically adapted skin to allow for cutaneous respiration through the following mechanisms (Beon et al 2013 ; Glover et al 2013 ; Kim 2022 ): a thicker epidermis with diverse gland and large cells; the presence of intraepithelial blood capillaries; a defined lymphatic space at the basal layer of epidermis; well-vascularized connective tissue, an absence of scales; and other specific multicellular adaptations related to gas exchange.…”

“…While researching the histology of fishes inhabiting intertidal pools and estuarine standing water, dermal vascularization (as in Rhinogobius brunneus and Tridentiger brevispinis ) was found in the skin of M . raitaborua (Kim 2022 ; Kim et al 2022 ). This study aims to describe the skin structure and analyze the morphometry of the epidermal thickness and diffusion distance of M .…”