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A STUDY ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCES OF BLACK BENGAL GOAT IN RELATION TO COAT COLORS


Journal of Sylhet Agricultural University, 2018, Volume 5, Number 2; Pages: 121-125

The present study was conducted to know the productive and reproductive performance of Black Bengal goats in relation to different coat colors. A total of 609 Black Bengal goats were selected from 35 private owned farms in Sylhet division during November 2017 to October 2018. Average birth weight and adult body weight gain after 12 months of white, solid black, black with Dutch belt spotting, and brown bezoar coat color goats were varied significantly. Birth weight is high in black with Dutch belt spotting coat and the adult weight gain after 12 months is high in solid black coat color. The average daily milk yield and the average lactation period of white, solid black, black with Dutch belt spotting, and brown bezoar coat color goats were varied significantly. The age at puberty varied according to the coat color. The age of first kidding of white, solid black, black with Dutch belt spotting and brown bezoar coat color goats did not vary significantly. The average gestation period in 1st parity, age at first conception and post-partum estrous of Black Bengal goat were not affected by the coat colors. Number of litter per kidding was higher in solid black i.e. the reproductive performance is better in solid black coated goats than that of other coat colors. From the present study, it may be concluded that the performances of solid black color goats were better than other coat colors in terms of adult weight of does, daily milk yield, lactation period, age at puberty, service per conception and litter size.


Keywords: Black Bengal Goat, Coat Color, Productive Performance, Reproductive Performance


MORPHOLOGICAL AND HISTOLOGICAL INVESTIGATIONS ON THE ADRENAL GLANDS IN BLACK BENGAL GOAT (Capra hircus)


Journal of Sylhet Agricultural University, 2016, Volume 3, Number 2; Pages: 181-187

Black Bengal goat is a highly prolific small ruminant well known for tender meat and good quality skin. A plenty of research work have already been conducted on the production performance of this goat breed but the research work to elucidate the histomorphology of different vital organs and glands of this breed is still in scarce. There is a close relation between the productivity and endocrine function. With an aim to study the histoarchitecture of adrenal gland of s/he goats, adrenal gland samples were collected from the government slaughter house of Sylhet, Bangladesh at the time of slaughtering. The differences in size and shape of the gland, the cortico-medullary ratio, cell size and nuclear diameters of the cortical and medullary tissues were studied in both sexes. For the histological examinations, the tissue pieces from adrenal glands were immersed in bouin’s fluid. After fixation, tissue samples were dehydrated, cleared, and embedded in paraffin. Haematoxylin and eosin staining method was used to examine tissue sections. The adrenal gland consisted of capsule (3.31% and 2.83%), cortex (70.75% and 72.26%) and medulla (25.94% and 24.91%) in buck and doe. The weight of the left gland was more than the right. Cortical cells were sometimes found in the medullary portion. Medullary epinephrine and norepinephrine cells size and nuclear diameter was more in male but the total length of medulla was more in female. The aim of this study is to provide valuable information for further research on the adrenal gland of goat.


Keywords: Black Bengal goat, adrenal gland, histoarchitecture, cortex, medulla


EFFECTS OF VARIOUS LOCAL ANALGESICS AND KETAMINE FOR CAUDAL EPIDURAL ANALGESIA IN BLACK BENGAL GOAT


Journal of Sylhet Agricultural University, 2014, Volume 1, Number 1; Pages: 1-9

The present study was conducted to find out the effect of analgesic and anaesthetic drugs for caudal epidural analgesia in Black Bengal goats. A series of thirty two (32) analgesic trails were conducted in goats age ranged from 8 to 12 months and with an average body weight of 8.1 kg. The animals were divided into four groups (n=4) and a replication of 8 trails was performed in each group at least one week interval. Two percent (2%) lidocaine hydrochloride (4 mg kg-1), 2% lidocaine hydrochloride with adrenaline (4 mg kg-1), 0.5% bupivacaine hydrochloride (1.0 mg kg-1) and ketamine hydrochloride (4 mg kg-1) were used to perform caudal epidural analgesia. The time of onset of anaesthesia, peak time of anaesthesia, area of desensitization and duration of anaesthesia were observed. 2% Lidocaine hydrochloride showed rapid onset of analgesia. 0.5% bupivacaine hydrochloride produced the highest area of desensitization in thigh region during caudal epidural analgesia. Perineal region and tail were totally desensitized during epidural analgesia. 0.5% bupivacaine hydrochloride prolonged the duration of analgesia during epidural analgesia. 2% Lidocaine hydrochloride and 2% Lidocaine hydrochloride with adrenaline showed no side effects whereas 0.5% bupivacaine hydrochloride showed shivering and drowsiness, ketamine hydrochloride excitement and drowsiness. It seemed that 2% Lidocaine hydrochloride is more effective whereas 0.5% bupivacaine hydrochloride is associated with side effects. Though ketamine hydrochloride is a dissociative agent, it could also be used in epidural analgesia.


Keywords: Effects, local analgesics, ketamine, caudal epidural analgesia, Black Bengal goat