Histological Characteristics of Selected Organs of Pseudecheneis sulcatus

Pseudecheneis sulcatus , an omnivorous fish, is one of the protected species in the Binglangjiang basin. Through histological sections and microphotographic observation, this paper analyzes the histological characteristics of oesophagus, stomach, intestine, liver, kidney, eggs, barbels, and brain of P. sulcatus . The results show that P. sulcatus contains a short oesophagus with numerous goblet cells, a stomach with the muscularis mucosae and gastric glands, and an intestine with long and complex mucosal folds, corresponding to its omnivorous habit. The boundaries of hepatic lobules are indistinct, and the size of hepatocytes is large. The cerebellum is small, which is in line with its benthic living habits. The barbels of P. sulcatus have numerous taste buds while having fewer goblet cells. In addition, all the eggs of P. sulcatus collected in this survey are at stage III of development, indicating that it has the univoltine ovary. There is no significant difference in the kidney compared with other teleost fishes. This study enriches the basic biological content of P. sulcatus and provides basic data for its artificial reproduction and resource protection, thereby effectively protecting this species and the biodiversity of the Binglangjiang.