Morphometrical and histological comparative analyses of omnivorous birds gastrointestinal tract презентация

The aim:
to compare morphometric and histological parameters of glandular stomach and duodenum of model omnivorous bird species.
The tasks:
- to study summer ration of Jay (Garrulus glandarius) and Magpie Ordinary (Pica pica) ( family Corvidae);
- to define morphological features of jay’s and magpie’s gastrointestinal tracts;
- to investigate and compare histological glandular stomach and duodenum structure of the given bird species.

Place of study
Jay (Garrulus glandarius)
Magpie Ordinary (Pica pica)

The research scheme

Summer feed composition of birds
Jay
Magpie

Morphometric characteristics of glandular stomach

Histological structure of glandular stomach
Magpie (*48)
Jay (*48)
1 - mucous membrane
2 - digestive glands of the submucosa
3 - muscular coat

Morphometric characteristics of duodenum

Histological structure of the duodenum
Jay (*56)
Magpie (*56)
1- layer of fibers
2 - layer of digestive glands (crypts)
3 - muscular coat
1
2
3

Conclusions
1) Differences in summer food composition of magpies and jays in the Stavropol region were analyzed. The main feed components for magpies are invertebrates (67%), while for jays - vertebrates (76%).
2) A connection between the histological structure of gastrointestinal tracts and basic birds’ feeds was determined.
a) presence of a large number of insects in the magpie diet resulted in the development of muscle membranes in glandular stomach;
b) development of muscle membranes in both magpies’ and jays’ glandular stomach and muscle plate was found;
c) inverse relation between intestine villi length and thickness of the birds was defined. A short magpies bowel wall layer of fibers is 72% and Jays intestine length - 66%.