Kim Hyun-Tae
Department of Science Education, Jeonju National University of Education, Jeonju, 55101, Republic of Korea.
Appl Microsc. 2022 Aug 9;52(1):8. doi: 10.1186/s42649-022-00077-y.
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.
韩国三齿虾虎鱼（Tridentiger brevispinis）生活在恶劣的栖息地，由于降水量低、区域干旱期和大量太阳辐射，这些栖息地很容易缺氧。组织学和形态学研究揭示了这种虾虎鱼特殊的皮肤（厚度为35.4 - 150.0微米），它由表皮和真皮组成。较厚的表皮包括最外层（有味蕾、复层扁平细胞、黏液细胞、色素细胞和复层多边形细胞）、中间层（有复层多边形细胞）和生发层（复层柱状细胞）。特别的是，真皮有鳞片、发达的血管化，并且在基底膜上方有一些毛细血管，鱼体侧面的扩散距离缩短。因此，诸如较厚的表皮、发达的血管化、少量毛细血管和缩短的扩散距离等适应性特征，可能为虾虎鱼在周期性旱季低氧水中生存提供皮肤呼吸功能。
