PRE-HATCH DEVELOPMENT OF LOWER DIGESTIVE TRACT IN TURKEY (Meleagris gallopavo)

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dc.contributor.advisorS. Maya
dc.contributor.authorHELNA MARIA WILSON
dc.date.accessioned2020-07-23T06:59:45Z
dc.date.available2020-07-23T06:59:45Z
dc.date.issued2018
dc.description.abstractPre-hatch developmental pattern of lower digestive tract in Beltsville White turkey was studied to investigate the morphogenesis and histogenesis and to derive its relationship with age and body weight. Materials for the study were collected from 60 embryos on third, fourth, sixth, ninth, twelfth, fifteenth, eighteenth, twenty-first, twenty-fourth and twenty-seventh day of incubation, and compared with those from six, day-old poults. Observations on morphology, histology, histochemistry, electron microscopy, morphometry and micrometry were carried out and data were analysed statistically to find out the relationship. In the present study, all the divisions of the primitive gut viz., foregut, midgut and hindgut were apparent during the fourth day of incubation. The regional differentiation of the primitive gut into different segments of lower digestive tract viz. duodenum, jejunum, ileum, caeca, colo-rectum and coprodeum, occurred by sixth day of incubation. The parameters of the segments of the lower digestive tract became grossly measurable by 15th day of incubation. The intestines were completely retracted into the body cavity by 27th day of incubation. There was significant increase in the weight and length of lower digestive tract and that of its segments as the age advanced. The histological examination of the segments revealed well developed tunica mucosa, tunica muscularis, tunica serosa and an inconstant tunica submucosa. The longitudinal folds of the tunica mucosa indicating future villi were obvious by 15th day of incubation in the present study, which differentiated further with advancement of age. All layers of the small and large intestines increased in thickness as age advanced and became similar to the adult structure by 21st day of incubation. The intestinal epithelium presented three types of cells, viz. chief cells, goblet cells and argentaffin cells and the epithelium of the villi formed crypts of Lieberkuhn by 24th day of incubation. The study revealed that the growth of the segments of the lower digestive tract was highly correlated with increase in body weight and age of the embryo during the prehatch period, confirming the early maturing nature of the digestive system.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810149680
dc.keywordsPRE-HATCH DEVELOPMENT LOWER DIGESTIVE TRACT TURKEY (Meleagris gallopavo)en_US
dc.language.isoenen_US
dc.pages93en_US
dc.publisherCOLLEGE OF VETERINARY AND ANIMAL SCIENCES, POOKODE WAYANADen_US
dc.research.problemPRE-HATCH DEVELOPMENT OF LOWER DIGESTIVE TRACT IN TURKEY (Meleagris gallopavo)en_US
dc.subVeterinary Anatomy and Histologyen_US
dc.subjectnullen_US
dc.themePRE-HATCH DEVELOPMENT OF LOWER DIGESTIVE TRACT IN TURKEY (Meleagris gallopavo)en_US
dc.these.typeM.V.Sc.en_US
dc.titlePRE-HATCH DEVELOPMENT OF LOWER DIGESTIVE TRACT IN TURKEY (Meleagris gallopavo)en_US
dc.typeThesisen_US
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