Figure 3 from Histological and histochemical study on the alimentary canal in Walking catfish (Claris batrachus) and piranha (Serrasalmus nattereri) | Semantic Scholar (2024)

The morphology, histology and histochemically the digestive tract of European catfish, Silurus glanis was examined, finding numerous deep longitudinal folds, squamous epithelium with numerous mucous cells which react positively to PAS and AB stains.

The results of the present study provide subsidies for a better understanding of the intestinal morphology of teleosts and provide valuable information for phylogenetic studies.

Gut morpho-histology did not respond to salinity changes, however, there was a significant reduction of mucosal height, goblet cell numbers and muscularis thickness upon food deprivation.

The obtained histomorphological differences in esophagus of both fish species may be attributed to their different feeding habits and type of food.

Alimentary tract of domestical catfish, oesophagus, gastric and intestines is investigated by Haematoxilin Eosin and histology of alimentary tract was revealed from tunica mucosa, submucosa, and serosa.

It was demonstrated that pyloric caeca in H. huso like other sturgeon fish were attached to each other and formed an organ called pylic caeca with a long leaf-shaped villi.

The stomach of the farmed African catfish was investigated in this study to establish its basic anatomy and produce baseline data for further investigative research, help fish clinicians in pathology and aid nutritionists in feed management.

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Anatomical and histological features of the digestive tract are consistent with the omnivorous habit of both these species and the three portions of the intestine showed no histological differences.

Eithelial secretory cells were found in the oesophagus, which synthesized a large quantity of sialosulphoglycoproteins likely to be related to a protective role and the surface epithelium of the stomach synthesizes and secretes acid and neutral GPs, probably related to the movement of fluids and to the absorption of easily digested substrates, respectively.

The analysis of data obtained in this study suggests that after 5‐DPH catfish larvae have morphologically completed digestive tracts.

The combination of species-specific histochemical differences in mucus and general histological and ultrastructural differences within the post-gastric regions between these species suggest a correlation between lumenal environmental conditions/histology and natural prey preference.

The paddlefish (Polyodon spathula) is one of the most primitive and unique freshwater fishes of North America, adapted as a plankton filter‐feeder and probably aids in selecting and entangling the food.

The results suggest that the pharyngeal cavity with the gustative corpuscles would induce the gastric secretion whereas the oesophagus is mainly involved in the transport of the food bolus to the stomach with the aid of abundant secretion of mucus.

The histological and histochemical characteristics of the intestine and the ultrastructure of it's mucosa were studied in rainbow trout and revealed that the wall of the intestines is composed of the tunica mucosa, tunica submucosa, Tunica muscularis and tunica serosa.

The histology of the digestive tract of the amberjack was studied using light and scanning electron microscopy to show variation in the different regions of the gut: acid mucines are found in the oesophagus, pyloric stomach, caeca, intestine and rectum, whereas neutral mucosubstances dominate in the anterior portion of the stomach.

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