[صفحه اصلی ]   [Archive]  
:: صفحه اصلي :: درباره نشريه :: آخرين شماره :: تمام شماره‌ها :: جستجو :: ثبت نام :: ارسال مقاله :: تماس با ما ::
:: دوره 18، شماره 4 - ( 6-1398 ) ::
جلد 18 شماره 4 صفحات 981-995 برگشت به فهرست نسخه ها
Structure and ultrastructure studies of the digestive tract of the endangered Qinling lenok (Brachymystax tsinlingensis Li, 1966)
چکیده:   (208 مشاهده)

The aim of this study was to investigate the structure and ultrastructure of the digestive tract of Qinling lenok (Brachymystax tsinlingensis Li, 1966), a cold water Salmonidae fish, an endangered teleost species, with high potential for controlled rearing in Shaanxi Province of China, by light and electron microscopy. Morphological data of the digestive tract are important for understanding fish nutrition, pathological or physiological alterations. The histological structure of Qinling lenok consists of four layers: mucosa, submucosa, muscularis and serosa. Taste buds were found in lips and esophagus. The esophageal mucosa consists of undifferentiated mucous cells and surface epithelial cells. The U-shaped stomach was divided into cardiac, fundic and pyloric region. There are numerous gastric glands in the submucosa layer of the cardiac and fundic stomach, but none of them are present in the pyloric region. The convoluted tube-shape intestine is lined by simple columnar epithelial cells with microvilli at the apical surface, with an intestinal coefficient of 0.61. There are numerous goblet cells in the intestine. Finger-like pyloric caeca were found in the front of intestine tube, with number ranged from 42 to 88. In ultrastructural level, mucous and glandular cells in the stomach were found, the glandular cell with well-developed tubulovesicular system, a great amount of pepsinogen granules, mitochondria and Golgi apparatus. The enterocytes with abundant microvilli contained mitochondria and lysosome, and mucous granules of goblet cells were apparent in the intestine. High density of lipid droplets of pyloric caeca might be concerned with fat-absorption. The present study suggests that the digestive tract of Qinling lenok is similar to other carnivorous fishes, in relation to its feeding habits.

متن کامل [PDF 829 kb]   (96 دریافت)    
نوع مطالعه: پژوهشي | موضوع مقاله: Biology & physiology
دریافت: ۱۳۹۵/۷/۳ | پذیرش: ۱۳۹۶/۵/۲۸
ارسال نظر درباره این مقاله
نام کاربری یا پست الکترونیک شما:

CAPTCHA


XML   English Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Xiong D, Meng Y, Yu H, Liu X, Liu H. Structure and ultrastructure studies of the digestive tract of the endangered Qinling lenok (Brachymystax tsinlingensis Li, 1966) . IJFS. 2019; 18 (4) :981-995
URL: http://jifro.ir/article-1-2400-fa.html

Structure and ultrastructure studies of the digestive tract of the endangered Qinling lenok (Brachymystax tsinlingensis Li, 1966) . مجله علوم شیلاتی ایران. 1398; 18 (4) :981-995

URL: http://jifro.ir/article-1-2400-fa.html



دوره 18، شماره 4 - ( 6-1398 ) برگشت به فهرست نسخه ها
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
Persian site map - English site map - Created in 0.05 seconds with 32 queries by YEKTAWEB 3991