The Plasticity and Morphofunctional Organization of the Digestive System of Waders (Charadrii) as Migrants

M. Kovtun, I. Lykova, L. P. Kharchenko
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引用次数: 3

Abstract

Abstract The results of the macro-micromorphological structure of the digestive system of the waders and comparative analysis with the migrants of the Aves are presented. It was revealed that the digestive system of waders at the anatomical level has a universal structure typical for representatives of class Aves. As a result of histological studies of the structure of the digestive tract, it was found that the feature of the wall of the waders small intestine is the dense location of the crypt in its own plate of the mucous membrane throughout its length. High proliferative capacity of cambial crypt cells and their multilayered location provide high secretory and regenerative activity of enterocytes, which helps to restore the mucous membrane and intensify the digestive processes, especially during the active feeding of the waders at the migration stopover points. At this time, the length and mass of the intestine, the mass of the stomach and the liver increase, what is considered as a reaction to a large number of feeds in the intensive feeding of birds and indicates the plasticity of their digestive system. It is shown that the change in the morphometric parameters of the waders digestive system organs depending on the migration situation is an integral part of the adaptive mechanism of the migratory birds, which provides the basic need of the organism - fat accumulation. Th e content of general liver lipids, abdominal fat and thoracic muscles in 6 species of tundra warblers with varying degrees of fat accumulation at the migration stopover points in the Azov-Black Sea region was studied.
候鸟涉禽消化系统的可塑性和形态功能组织
摘要本文报道了涉禽消化系统的大微形态结构,并与候鸟进行了比较分析。结果表明,在解剖水平上,涉禽的消化系统具有典型的鸟类代表的普遍结构。由于对消化道结构的组织学研究,发现涉禽小肠壁的特征是整个长度的隐窝在其自身的粘膜板中的密集位置。形成层隐窝细胞的高增殖能力和它们的多层位置提供了肠细胞的高分泌和再生活性,这有助于恢复粘膜和加强消化过程,特别是在迁徙中途停留点的涉禽主动进食期间。此时,肠道的长度和质量,胃和肝脏的质量增加,这被认为是鸟类密集饲养中对大量饲料的反应,表明它们的消化系统具有可塑性。研究表明,涉禽消化系统器官形态计量参数随迁徙情况的变化是候鸟适应机制的重要组成部分,它提供了生物脂肪积累的基本需要。研究了亚速海-黑海地区6种不同脂肪积累程度的冻土带莺在迁徙中转站的一般肝脏脂质、腹部脂肪和胸肌含量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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