• S S Guraya

      Articles written in Proceedings – Animal Sciences

    • Morphological and histochemical changes in the follicular epithelium during follicular growth in the crowCorvus splendens

      R K Chalana S S Guraya

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      Morphological and histochemical changes in the follicular epithelium have been studied during folliculogenesis in the crow (Corvus splendens) ovary. The follicular epithelium is single-layered in primordial and early previtellogenic, pseudostratified in late-previtellogenic, multilayered in early vitellogenic and again becomes single-layered in late-vitellogenic oocytes. Two types of follicle cells have been distinguished on the basis of their structure and cytochemical properties. Some of the follicle cells separate from the follicular epithelium and invade the ooplasm where they seem to be reabsorbed by the latter. The amount of lipids and proteins increases in the follicular epithelium as the oocyte grows. Simultaneously the nature of lipids and proteins changes, as revealed by various histochemical reactions. The follicular epithelium, at all stages of follicular growth, shows moderate reactions for acid phosphatase and NAD-diaphorase. The significance of the structural and histochemical changes in the follicular epithelium during oogenesis have been discussed.

    • Seasonal variations in the lipid composition of ram (Ovis aries) testis

      G S Bilaspuri S S Guraya

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      The seasonal variations in the various categories of lipids have been investigated by dividing the year into five seasons, i.e. spring, summer, rains, autumn and winter. The data have been analysed by using student’st-test. Non-significant seasonal variations (p<0.05) are found when all the seasons are compared for total lipids, non-polar lipids, glycerides and unidentified lipids and the ratio of phospholipids and non-polar lipids. All the various lipid components and their ratios vary non-significantiy (p<0.05) in summer vs autumn, summer vs winter and autumn vs winter. Some lipid components vary significantly at different levels when seasons are compared. The significance of the results has been discussed.

    • Effect of castration on some hydrolytic enzymes in the rat vas deferens: A histochemical study

      S S Guraya Arbans J Kaur

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      A histochemical study has been made of alterations in some hydrolytic enzymes such as alkaline phosphatase, acid phosphatase and 5’-nucleotidase of the vas deferens of sexually mature albino rats following bilateral testectomy. Three weeks after operation, vas deferens shows a significant decrease in the activities of acid phosphatase, alkaline phosphatase and 5’-nucleotidase indicating conspicuous metabolic alterations and reduction in transport mechanisms following removal of the source of androgens.

    • Effects of aqueous and lipoidal extracts of the wall of preovulatory follicles on the ovary of growing chicks

      R K Parshad G Grewal S S Guraya

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      Effects of continuous intramuscular administration of the lipoidal and aqueous extracts of the wall of the largest preovulatory follicle (3·8–4·0 cm), to chicks from 11 to 29 weeks on alternate days have been studied on the ovarian growth, follicular growth and atresia, and the onset of ovulation. The lipoidal and aqueous extracts appear to have antagonistic effects on the follicular growth and atresia. Chicks injected with lipid extract show increased ovarian weight, enhanced follicular growth and egg laying started at 22nd week which is earlier to 25th week in control birds. The onset of egg laying was delayed in chicks injected with aqueous extract of largest follicle wall by 4 weeks as compared to control birds. Their ovaries showed decreased rate of follicular growth and increased follicular atresia as a result of which abundant amount of lipid-rich interstitial gland tissue of thecal origin accumulates in them.

    • Histochemical distribution of tetrazolium reductases, dehydrogenases and lipids in the follicular wall of normal and atretic follicles in the ovary of the Indian gerbilTatera indica (Muridae: Rodentia)

      V R Parshad S S Guraya

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      The comparison of the histochemical features of the follicular wall in normal and atretic follicles of corresponding stages in the ovaries of Indian gerbilTatera indica revealed conspicuous changes in amount of lipids and activities of NADH- and NADPH tetrazolium reductases, δ5-3β-hydroxysteroid dehydrogenase and 17α-hydroxysteroid dehydrogenase and succinate- and lactate dehydrogenases in the granulosa layers during follicular growth and atresia. The thecal layers showed a progressive increase in their amounts during follicular growth and these enzymes are not affected significantly by atresia. Atresia resulted in increased amounts of lipids in the granulosa cells and decreased activities of succinate- and lactate dehydrogenases and NADH- and NADPH tetrazolium reductases during latter stages of degeneration.

    • The germ cell types and spermiogenesis in rose-ringed parakeetPsittacula krameri (Scopoli)

      H R Dang S S Guraya

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      By employing haematoxylin-eosin, iron haematoxylin, PAS and Feulgen reaction techniques, a morphological study has been made of spermatogenic cells in sexually matured parakeetPsittacula krameri. Type-A, intermediate and B spermatogonia occur in addition to type Ao (stem spermatogonia). The Ao spermatogonia is the major constituent of the testis during the regression period. Types A and B are further subdivided on the basis of nuclear size and appearance. The leptotene, zygotene, pachytene and diplotene are also differentiated into early and late stages. The spermatocytes at metaphase have also been observed but their number is very few indicating their very short life period. The round spermatids have also been subdivided into two types (i) spermatids with distinct chromatin (ii) spermatids with homogenously stained nuclei. Spermiogenesis has been subdivided into seventeen stages. The study will serve as a fundamental tool in establishing the correlation between gonadotrophins and seasonal reproductive cyclicity of the parakeets.

    • Histoenzymological differences in the envelope of white and stages of rapidly growing yellow follicles in the ovary of crow (Corvus splendens)

      R K Parshad S S Guraya

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      Histoenzymological differences in the localization and intensities of succinate and lactate dehydrogenases, tetrazolium reductases and steroid dehydrogenases have been studied in the follicular envelope of white and stages of yellow follicles of the crow ovary. The activities of these enzymes in the thecal gland cells show a progressive increase during follicular growth. The granulosa layer of white follicle is devoid of Δ5-3β-hydroxysteroid dehydrogenase which appear and show a gradual increase in the rapidly growing yellow follicles along with other enzymes.

    • Evaluation of brodifacoum against house murids of Garhwal Himalaya (India)

      C Sheikher N Ahmad S S Guraya

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      Brodifacoum (WBA 8119) was tested at various concentrations (0·02, 0·01, 0·005, 0·0025 and 0·00125%) by choice tests in laboratory against house murids vizRattus rattus gangutrianus Hinton andMus musculus Linnaeus of Garhwal Himalaya. It was fairly acceptable and produced 100% mortality of both the target species at all levels of its concentrations except at 0·00125% level causing 83·3% mortality inRattus rattus gangutrianus and 100% inMus musculus. The mean period of mortality is increased with the decrease in the concentration, the range being 3–17 days. In house trial a short exposure of 1-night of moist brodifacoum (0·0025%) bait after pre-baiting for 3-nights produced 100% murids mortality which was significantly (P<0·01) higher than that achieved in a similar trial with dry brodifacoum bait.

    • Qualitative and quantitative changes in lipids along the length of female reproductive system of the poultry nematodeAscaridia galli (Schrank 1788)

      D S Jitla V R Parshad S S Guraya

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      Qualitative and quantitative studies have been made of lipids along the length of the female reproductive system of the poultry nematode,Ascaridia galli. Adult specimens were collected in 0·9% saline from the intestines of naturally infected fowls. The quantitative studies have revealed significant (P=0·05) differences of total lipids, phospholipids, sterols, free fatty acids and glycerides and significantly (P<0·001) higher amounts of non polar than polar lipids in different regions of the reproductive system. The qualitative studies have showed that the germinal, growth and maturation regions of the ovary, oviduct and uterus contained 7, 7, 6, 6, 10 fractions respectively of polar and 12, 12, 12, 11, 10 fractions respectively of non polar lipids.

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