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Assam Agricultural University, Jorhat

Assam Agricultural University is the first institution of its kind in the whole of North-Eastern Region of India. The main goal of this institution is to produce globally competitive human resources in farm sectorand to carry out research in both conventional and frontier areas for production optimization as well as to disseminate the generated technologies as public good for benefitting the food growers/produces and traders involved in the sector while emphasizing on sustainability, equity and overall food security at household level. Genesis of AAU - The embryo of the agricultural research in the state of Assam was formed as early as 1897 with the establishment of the Upper Shillong Experimental Farm (now in Meghalaya) just after about a decade of creation of the agricultural department in 1882. However, the seeds of agricultural research in today’s Assam were sown in the dawn of the twentieth century with the establishment of two Rice Experimental Stations, one at Karimganj in Barak valley in 1913 and the other at Titabor in Brahmaputra valley in 1923. Subsequent to these research stations, a number of research stations were established to conduct research on important crops, more specifically, jute, pulses, oilseeds etc. The Assam Agricultural University was established on April 1, 1969 under The Assam Agricultural University Act, 1968’ with the mandate of imparting farm education, conduct research in agriculture and allied sciences and to effectively disseminate technologies so generated. Before establishment of the University, there were altogether 17 research schemes/projects in the state under the Department of Agriculture. By July 1973, all the research projects and 10 experimental farms were transferred by the Government of Assam to the AAU which already inherited the College of Agriculture and its farm at Barbheta, Jorhat and College of Veterinary Sciences at Khanapara, Guwahati. Subsequently, College of Community Science at Jorhat (1969), College of Fisheries at Raha (1988), Biswanath College of Agriculture at Biswanath Chariali (1988) and Lakhimpur College of Veterinary Science at Joyhing, North Lakhimpur (1988) were established. Presently, the University has three more colleges under its jurisdiction, viz., Sarat Chandra Singha College of Agriculture, Chapar, College of Horticulture, Nalbari & College of Sericulture, Titabar. Similarly, few more regional research stations at Shillongani, Diphu, Gossaigaon, Lakhimpur; and commodity research stations at Kahikuchi, Buralikson, Tinsukia, Kharua, Burnihat and Mandira were added to generate location and crop specific agricultural production packages.

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20221
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Subject: Animal Reproduction, Gynaecology and Obstetrics × Author: DAS, CHAYANIKA ×
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    ThesisItemOpen Access
    EXTRAPOLATION OF GESTATIONAL CURVE AND WHELPING TIME IN BITCH
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2022-01) DAS, CHAYANIKA; Barua, P. M.
    To study extrapolation of gestational curve and determination of whelping time, gestation period of six (6) crossbred bitches were divided into first, second and third phases; planned to study on 0-day (day of mating), 10th , 20th , 30th , 40th , 50th day and on the day of term or whelping. Different parameters of physical and behavioural signs, extrafoetal and foetal structures, vaginal cytology and haematobiochemical parameters were taken for the study. The per cent mean of enlarged belly (50.00%) and enlarged udder and teats (83.33%) were first found to be recorded from second phase, while, oozing of milk (100.00%) and vulvar swelling (100.00%) were recorded on third phase of gestation, respectively. The occurrence of reduced appetite, decreased activity, restlessness and nesting behaviour of behavioural signs were found 100.00% on day of whelping. Gestational Sac Diameter (GSD) was first recorded (02.17 ± 0.07 mm) on 20th day of first phase of gestation. Inner Chorionic Cavity (ICC), Crown Rump Length (CRL) and Foetal Head Diameter (FHD) was first recorded as 15.03 ± 0.27 mm, 12.98 ± 0.29 mm and 07.05 ± 0.09 mm, respectively on 30th day of second phase of gestation in crossbred bitch. The FHD was increasing throughout phases of gestation and found 29.28 ± 1.11 mm diameter on day of whelping. There was highly significant (P<0.01) difference between groups, between day of gestation and between interaction groups x days of gestation. The Foetal Heart Rate (FHR) was first recorded on 30th day of second phase of gestation which was found 207.17 ± 4.93 beats/min. FHR was significantly (P<0.01) differed between days; recorded 146.00 ± 7.52 beats/min on day of whelping. On day of mating (0-day), the Large Intermediate and Superficial Keratinized cells were recorded as 9.00 ± 0.52% and 91.00 ± 0.52%, respectively. On day of whelping, highest (59.67 ± 0.56%) and lowest (2.67 ± 1.43%) values were recorded in case of Small Intermediate cells and Superficial Keratinized cells. There was significant difference (P<0.01) between types of cells on different days of first, second and third phase of gestation. While between days of gestation no significant difference was found. Highly significant (P<0.01) difference recorded in interaction between days of gestation x types of cells. Level of progesterone was increasing from 10th day of gestation (29.97 ± 0.54 ng/ml) which dropped on day of whelping to 1.66 ± 0.25 ng/ml. Relaxin level reduced on 10th day of gestation (0.39 ± 0.03 ng/ml) which then gradually was increasing till 50th day of gestation (5.54 ± 0.39 ng/ml); on day of whelping recorded as 3.71 ±0.86 ng/ml. Both progesterone and relaxin were significantly (P<0.01) differed between day of gestation in crossbred bitches. There was highly significant (P<0.01) difference of C-Reactive Protein between day of gestation. On day of whelping C-Reactive Protein was recorded as 11.62 ± ABSTRACT 2.32 mg/L. There was significant (P< 0.01) difference between calcium and phosphorus; significantly (P< 0.05) differed on each day of first, second and third phase of gestation. But, non-significant difference recorded between days of gestation and in interaction between minerals  days of gestation. On day of whelping, level of calcium and phosphorus was recorded as 10.21 ± 0.31 mg/L and 4.47 ± 0.31 mg/L, respectively. Haemoglobin and glucose per cent was recorded on day of whelping as11.07 ± 0.54 gm/dl and 108.18 ± 2.90 mg/dl, respectively. The values were differed non-significantly between days of gestation. From this study it was concluded that pregnancy could be first confirmed based on GSD and FHR, respectively by 20th and 30th day of first and second phase of gestation. On day of whelping, examination of vaginal cytology revealed significantly (P<0.05) increased Small Intermediate cells (SIC), while, Superficial Keratinized Cells (SKC) significantly (P< 0.05) decreased. Level of progesterone and relaxin hormone significantly (P<0.05) decreased on the day of whelping.