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Articles by J.S. Rwuaan
Total Records ( 4 ) for J.S. Rwuaan
  J.S. Rwuaan , P.I. Rekwot , P.A. Abdu , L.O. Eduvie and J.A. Obidi
  Twenty-five cocks consisting of 14 red and 11 white Shikabrown cocks selected on the basis of body weight and antibody titres were infected with 0.2 ml of 106.0 EID50 of a velogenic Kudu 113 strain of Newcastle disease virus intranasally and intraocularly. Twenty-five cocks consisting of 14 red and 11 white Shikabrown cocks served as controls. Cloacal temperatures, live weights and semen samples of both control and infected cocks were taken weekly for six weeks. Semen was collected by abdominal message and evaluated for volume, colour, motility, concentration, percent live spermatozoa and percent total spermatozoa abnormalities. The semen volume of infected red cocks showed a general increase over that of control red cocks. The semen volume of the control white Shikabrown cocks was significantly (p<0.05) higher than that of the infected white cocks. The white Shikabrown cocks had higher semen volume than the red Shikabrown cocks. The red Shikabrown cocks had slightly better semen colour than the white Shikabrown cocks. The control white cocks had better (p<0.05) spermatozoa motility than the infected white cocks, while the infected red cocks had significantly (p<0.05) spermatozoa motility than the control red cocks. Generally, the white Shikabrown cocks had better spermatozoa motility than the red cocks. The spermatozoa concentration of the control white cocks was consistently higher than that of the infected white cocks; the reverse was the case with the red cocks where the spermatozoa concentration of the infected red cocks was higher than that of the control red cocks. The white cocks had higher spermatozoa concentration than the red cocks. The control white Shikabrown cocks had significantly (p<0.05) higher percent live spermatozoa than the infected white cocks. The infected red Shikabrown cocks had significantly (p<0.05) higher percent live spermatozoa than the control red cocks. The control white cocks had significantly (p<0.05) higher percent live spermatozoa than the control red cocks. The infected red and white Shikabrown cocks had higher percentage total spermatozoa abnormalities than the control red and white cocks. It can be concluded from this study that the white Shikabrown cocks had better semen quality than the red Shikabrown cocks. It is recommended that breeder cocks be routinely vaccinated against Newcastle disease to ensure that the level of antibodies is high enough to prevent adverse effects on semen quality.
  J.S. Rwuaan , P.I. Rekwot , P.A. Abdu , L.O. Eduvie and J.A. Obidi
  Fifty 20 week old Shikabrown cocks consisting of 22 red Shikabrown and 28 white Shikabrown cocks were purchased from the National Animal Production Research Institute, Shika and used for this study. Twenty-five of the cocks made up of 12 red and 13 white cocks selected on basis of weight were infected with 2 ml of 106.0 EID5.0 of a Velogenic Kudu 113 strain of Newcastle disease virus intranasally and orally. The remaining twenty-five cocks made up of 14 red and 11 white served as control. Blood samples were taken from the wing veins of both infected and control cocks and centrifuged in a Hermle Z364 centrifuge at 251.6 g for packed cell volume, total protein and Newcastle disease antibody titres. There was no significant difference in the packed cell volume of the control and infected red Shikabrown cocks. Similarly there was no significant difference in the packed cell volume of the control and infected white Shikabrown cocks, although the infected cocks had slightly lower values. Total protein did not show any significant difference between the control and infected red cocks and between the control and infected white cocks. The antibody titres of the control red and white cocks were significantly (p<0.05) lower than those of the infected red and white cocks. This finding showed that the challenged red and white cocks had high antibody titres and a slight drop in packed cell volume. The mean antibody titres of 1.9 ±0.7 to 4.6 ±0.4 log2 provided protection to the Shikabrown cocks against the velogenic Newcastle disease virus since none of the challenged cocks died. This study suggests that in an endemic environment like Zaria, poultry farmers keeping Shikabrown chickens should vaccinate them against Newcastle disease. Challenging the red and white Shikabrown cocks with the velogenic Newcastle disease virus increased their protection against the Newcastle disease.
  J.S. Rwuaan , P.I. Rekwot , P.A. Abdu , L.O. Eduvie , B.O. Omontese and J.A. Obidi
  Fifty 20 weeks old Shikabrown (SB) cocks consisting of 22 red and 28 white SB cocks were purchased from the National Animal Production Research Institute Shika. The cocks were fed on a diet of layers mash with 18% crude protein, 95.6% dry matter, 17.1% crude fibre and 3% nitrogen. About 25 cocks consisting of 8 red and 17 white SB cocks selected on the basis of body weight and antibody titres were infected with 0.2 mL of 106.0 EID50 of velogenic Kudu 113 strain of Newcastle disease virus intranasaly and orally. About 25 cocks consisting of 14 red and 11 white SB cocks served as control. Cloacal temperatures, body weights and semen samples of both control and infected cocks were taken weekly for 6 weeks. The semen was evaluated for volume, colour, motility, concentration, percentage live spermatozoa and percentage total spermatozoa abnormalities. Semen colour was graded as creamy (1 = very good); milky (2 = good) and watery (3 = poor). There was no significant difference in the cloacal temperatures and body weights of control and infected red and white SB cocks. The infected red and white cocks had slightly higher cloacal temperatures than the control. The semen volume of infected red cocks showed a general increase over that of the control red cocks. The semen volume of the control white SB cocks was significantly higher than that of the infected white cocks. The white SB cocks had higher semen volume than the red SB cocks. The red SB cocks had slightly better semen colour than the white SB cocks. The control white cocks had higher spermatozoa motility than the infected white cocks while the infected red cocks had higher spermatozoa motility than the control red cocks. The white SB cocks generally had better spermatozoa motility than the red cocks. The spermatozoa concentration of the control white cocks was consistently higher than that of the infected white SB cocks; the reverse was the case with the red cocks where the spermatozoa concentration of the infected red cocks was higher than that of the control red cocks. The white cocks had better spermatozoa concentration than the red cocks. The control white SB cocks had significantly (p<0.05) higher percent live spermatozoa than the infected white cocks. Similarly, the infected red SB cocks had lower percent live spermatozoa than the control red cocks. The control white SB cocks had significantly (p<0.05) higher percent live spermatozoa than the control red SB cocks. The infected red and white SB cocks had higher percentage total spermatozoa abnormalities than the contol red and white cocks. It can be concluded from this study that the white SB cocks had better semen quality than the red SB cocks; the non-infected SB cocks had better semen quality than the infected SB cocks. It is recommended that white SB cocks be used for breeding purposes and that breeder cocks should be routinely vaccinated against Newcastle disease to ensure that the level of antibodies is high enough to prevent adverse effect on semen quality.
  B.O. Omontese , P.I. Rekwot , H.J. Makun , J.A. Obidi , J.S. Rwuaan and N.P. Chiezey
  The efficiency of EAZI-Breed™ CIDR® and FGA-30® intravaginal sponges in synchronizing estrus was investigated in prepartum Red Sokoto does. About 19 randomly cycling pre-partum Red Sokoto does aged between 1.5-2 years and weighing between 12-14 kg were used for this study. They were randomly assigned into two groups, Group A (FGA, n = 10) and Group B (CIDR®, n = 9) for 21 days. Natural mating was performed following progestagen withdrawal for animals detected to be on heat. Estrus response was 20 and 55.6% in groups A and B, respectively. The time to estrus onset following progestagen withdrawal for FGA and CIDR (Mean±S.D.) was 93.09±2.06 and 50.29±4.71 h; duration of induced estrus (0.08±0.05 and 39.99±6.05 h) while estrus cessation was (93.14±2.03 and 90.48±4.69 h) in group A and B, respectively. Interval between withdrawal of progestagen and onset of estrus was significantly (p<0.05) longer in FGA compared to CIDR. The duration of induced estrus period was significantly (p<0.05) longer in CIDR treatment. Retention rate was 100% (FGA) and 88.9% (CIDR) in group A and B, respectively. Drawstring breakage was observed in FGA sponges but absent in CIDR devices. Also, vaginal discharge rate was higher in FGA than CIDR groups. These results show that CIDR devices are more efficient in synchronizing estrus in prepartum Red Sokoto does. This is because CIDR provides higher estrus response rate, shorter time to estrus, longer duration of estrus, absence of drawstring breakage and better ease of application. Therefore, the use of CIDR is advocated.
 
 
 
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