The present study aimed to investigate the macroscopic structure of the gastrointestinal tract (GIT) of Schizothorax esocinus Heckel, 1838. The surface architecture of the buccopharynx, oesophagus and the entire intestinal tract of S. esocinus has been examined under scanning electron microscope (SEM) after fixing in 2.5% glutaraldehyde buffered with 0.1 M sodium cacodylate at pH 7.3 for 18–48 hours and post-fixation for two hours at room temperature in 1% osmium tetra oxide buffered at pH 7.3 with 0.1 M cacodylate. The mucosal surface of buccopharynx, esophagus, intestinal bulb, and intestine reveal prominent longitudinal major or primary mucosal folds which are further subdivided into the series of irregular and well-circumscribed folds called minor or secondary folds. However, in the intestinal bulb and intestine, the longitudinal major or primary folds themselves form wavy or zigzagging patterns along the mucosal surface. The fine structure of the surface epithelium further shows that the apical surfaces of the epithelial cells are ped with finger-print like microridges, arranged in various patterns and regularly spaced. The rectal mucosa, on the other hand, displays a highly irregular type of major mucosal folds. The separation can’t be seen between major mucosal folds. A thin film of mucous spread over the mucosal folds and the numerous pores through which mucous cells release their content has also been noted along the rectal mucosa. This investigation suggests the possible role of different digestive organs in relation to feeding, digestion, storage, absorption, and various other physiological processes, thereby providing a knowledge necessary to the understanding of pathological or physiological alterations in both aquaculture and natural environment.
Delhi, the capital city of India, which is the concern of this chapter, has its own significance as it is the seat of governance, learning, and the healthcare service provider. Capital cities though inhabit people from every region and tend to be overcrowded, but in Delhi, the situation is not only the nature of a capital city, but also the industrial and commercial centre of high order in the northern zone of India, which is creating a number of environmental problems, such as air and water pollution, slum development, congested housing, etc. The chapter discusses all causes of Delhi's environmental problems like atrophy of political will, mismanaged urbanisation, court interventions, etc., and finally, the chapter tries to find out possible solutions in a detailed manner keeping in view the measures taken by other countries like China to deal with such problems.
The district Anantnag right from its inception is known as the major supplier of agricultural produce, because major portion of population of the district comprised of rural areas and were involved in agricultural activities as their main source of income. The non-seriousness of authorities has forced the agricultural section of society to look for some other options. Within a short span of time rice and maize the major crops were replaced by fruit and willow plantation at a larger scale. This shift to new plantation has proved very beneficial as compared to other crops. Kashmiri apple has become very popular throughout the country. Its high demand has really opened the new ways of development. Similarly the willow cricket bats of Kashmir have earned the world reputation. The new module to a certain extent has revived the trade links of Kashmir. One the one hand it has proved to be fruitful business but on the other it has started to bring miseries in shortage of food and very soon people have to face the severe crisis of food. The food at present is procured from other parts of country. During earlier times people were producers, but at present they have become consumers. The authorities have never tried to improve the quality of main crops of valley that resulted in its decline.
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