Gabriella A Benchaya, Adriane C Ramires, Amanda Maria Picelli, Marcela Dos Santos Magalhães
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引用次数: 0
摘要
这项研究的目的是描述超鳞蜥消化道的特征及其与已描述的该物种饮食和觅食行为的关联。研究人员在巴西亚马孙州马瑙斯市附近的森林地区捕获了五只蜥蜴。采集舌头、食道、胃、小肠和大肠碎片,固定后进行光学显微镜检查。舌头中央有透明软骨,舌尖的乳头和舌根的腺体对阿尔新蓝呈阳性反应。食道黏膜呈褶皱状,由黏液上皮和鹅口疮细胞覆盖,对 PAS 和阿尔新蓝呈阳性反应。贲门区和胃底区存在胃腺,而且所有区域都对 PAS 呈阳性反应。小肠和大肠的褶皱和绒毛均有变化,鹅口疮细胞的数量和排列也有变化。小肠的粘液和鹅口疮细胞在 PAS 中呈阳性染色,而只有鹅口疮细胞在 Alcian 蓝中呈阳性。这些研究结果表明,亚马逊潜蜥的消化道器官(主要是舌头和胃)的形态与伏地觅食和主要以小型无脊椎动物为食有关。
Morphological description of the digestive tract of the Amazonian Diving Lizard Uranoscodon superciliosus (Linnaeus, 1758) and its associations to the diet and foraging mode.
The study aimed to characterize the digestive tract of Uranoscodon superciliosus and its associations to the diet and foraging behavior already described for the species. Five lizards were captured in forest areas near the city of Manaus, Amazonas, Brazil. Tongue, oesophagus, stomach, small and large intestines fragments were collected, fixed, and processed for light microscopy. Hyaline cartilage was present in the center of the tongue, and the papillae from the apex and glands from the radix showed positive reaction to Alcian blue. The oesophagus presented a folded mucosa, covered by an epithelium with mucous and goblet cells positive to PAS and Alcian blue. There was presence of gastric glands in the cardic and fundic stomach regions, plus all the regions reacted positively to PAS. Fold and villi variations in both small and large intestine were noted, as well as the number and arrangement of goblet cells. Mucous and goblet cells from the small intestine were positively stained in PAS, while only the goblet cells were Alcian blue positive. These findings indicate that the Amazonian Diving Lizard's digestive tract organs, mainly the tongue and stomach, present morphologies associated to ambush-type foraging and a specific diet largely based on small invertebrates.
期刊介绍:
The Brazilian Academy of Sciences (BAS) publishes its journal, Annals of the Brazilian Academy of Sciences (AABC, in its Brazilianportuguese acronym ), every 3 months, being the oldest journal in Brazil with conkinuous distribukion, daking back to 1929. This scienkihic journal aims to publish the advances in scienkihic research from both Brazilian and foreigner scienkists, who work in the main research centers in the whole world, always looking for excellence.
Essenkially a mulkidisciplinary journal, the AABC cover, with both reviews and original researches, the diverse areas represented in the Academy, such as Biology, Physics, Biomedical Sciences, Chemistry, Agrarian Sciences, Engineering, Mathemakics, Social, Health and Earth Sciences.