COPYRIGHT on the article "Endocrine cells in the enteric mucosa of an important brazilian hybrid fish". DOI: http://doi.org/10.6008/CBPC2318-2881.2022.002.0004
ID Fraction: Collection Year 2022 #534 NFT Stock of CBPC (Brazil)

Abstract: The jundiara (Pseudoplatystoma reticulatum x Leiarius marmoratus) is a hybrid widely cultivated in Brazil due to its organoleptic characteristics, rusticity, for being easy to cultivate, and for having a pleasant flavor. The endocrine cells of the intestinal tract play an important role in fish nutrition, being related to enteric digestion and absorption. The objective of this study was to investigate the presence of endocrine cells in the intestinal tract of catfish. Ten fish were necropsied and three fragments collected from each region of the intestine were fixed in formalin, histologically processed and the slides were stained using the Grimelius and modified Masson-Fontana techniques. The argyrophil and argentaffin endocrine cells were found in the intestinal mucosa distributed between the enterocytes and calliciform cells and in the lamina propria. Two types of cells were observed regarding their opening, (i) open to the lumen (ii) closed surrounded by connective tissue in the lamina propria. Knowledge of the intestinal morphology in hybrid species is important because it can contribute significantly to the management and adaptation of captive species.