Morphological, histological and histochemical analysis of the digestive tract of Trachelyopterusstriatulus (Siluriformes: Auchenipteridae)
Autor: | Tiago Casarim Pessali, José Enemir dos Santos, Marcella L. dos Santos, Fábio Pereira Arantes |
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Jazyk: | angličtina |
Rok vydání: | 2015 |
Předmět: |
mucosubstances
Pathology medicine.medical_specialty Brush border Stomach omnivorous Stratified squamous epithelium Anatomy Biology Pharyngeal teeth Epithelium medicine.anatomical_structure Tongue Gastric glands catfish morphology lcsh:Zoology medicine biology.protein Animal Science and Zoology Amylase lcsh:QL1-991 |
Zdroj: | Zoologia (Curitiba), Vol 32, Iss 4, Pp 296-305 (2015) |
ISSN: | 1984-4689 |
Popis: | The digestive tract of Trachelyopterus striatulus (Steindachner, 1877) was studied using morphological, histological, and histochemical techniques. The barbels, lips and tongue had stratified squamous epithelium with mucous, claviform cells, and taste buds. Trachelyopterus striatulus had a dental plaque with villiform teeth. The bucopharyngeal cavity was formed by the gill apparatus and pharyngeal teeth with vilifform denticles. The oesophagus presented stratified squamous epithelium with mucous cells and taste buds. The stomach included cardiac, fundic, and pyloric regions and a simple prismatic epithelium with prismatic cells that reacted positively to periodic acid-Schiff (PAS) and amylase+PAS. Only the cardiac and pyloric regions responded positively to alcian blue pH 2.5 (Ab pH 2.5) and alcian blue pH 0.5 (Ab pH 0.5). The cardiac and fundic regions exhibited tubular gastric glands. The intestine was 118.90 ± 22.49 mm long with an intestinal coefficient (CO) of 0.83 ± 0.13. The epithelium was simple prismatic with a brush border and goblet cells, and a greater number of goblet cells were found in the caudal region of the intestine. The mucous cells and goblet cells reacted positively to PAS, amylase+PAS, Ab pH 2.5, and Ab pH 0.5. We analysed if the function of the mucosubstances and morphological characteristics of the digestive tract of T. striatulus are compatible with omnivorous feeding habit. |
Databáze: | OpenAIRE |
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