Boyd R B, DeVries A L, Eastman J T, Pietra G G
Cell Tissue Res. 1980;213(3):361-7. doi: 10.1007/BF00237884.
The fine structure of the secondary lamellae of gills was examined in two cold-water marine teleosts, the winter flounder, Pseudopleuronectes americanus, and the antarctic cod, Trematomus borchgrevinik. In both species the overall lamellar fine structure is similar to that of other marine teleosts. The major variations in cellular organization involve the distribution of both the "chloride cells" and the mucous cells on the secondary lamellae of P. americanus. At winter water temperatures of +2.5 degrees C, significantly more chloride and mucous cells are present than in summer with water temperatures of +15.2 degrees C. Both cell types are routinely present throughout the length of a secondary lamella as far as the lamellar tip. The chloride cells on the secondary lamellae are always situated in the inner layer of epithelium deep to the outer pavement cells. T. borchgrevinki shows no apparent difference in the distribution of mucous cells either at its normal water temperature of -1.9 degrees C or at a temperature of +4 degrees C, the upper limit of its thermal tolerance to which some specimens were adapted in the aquarium. Chloride cells were never observed on the secondary lamellae of T. borchgrevinki. This suggests that low environmental water temperatures may be related to the distribution of mucous cells and chloride cells on the secondary lamella of the teleost gill.
对两种冷水海洋硬骨鱼——美洲拟庸鲽（Pseudopleuronectes americanus）和南极鳕（Trematomus borchgrevinik）鳃小片的精细结构进行了研究。在这两个物种中，鳃小片的整体精细结构与其他海洋硬骨鱼相似。细胞组织的主要差异涉及美洲拟庸鲽鳃小片上“氯细胞”和黏液细胞的分布。在水温为2.5摄氏度的冬季，氯细胞和黏液细胞的数量明显多于水温为15.2摄氏度的夏季。这两种细胞类型在鳃小片的整个长度上直至小片尖端都有规律地存在。鳃小片上的氯细胞总是位于上皮内层，在外表皮细胞之下。南极鳕在其正常水温-1.9摄氏度或水温4摄氏度（一些标本在水族箱中适应的热耐受上限温度）时，黏液细胞的分布没有明显差异。在南极鳕的鳃小片上从未观察到氯细胞。这表明低环境水温可能与硬骨鱼鳃小片上黏液细胞和氯细胞的分布有关。
