654 research outputs found
High level dietary inclusion of monosodium glutamate lowers daily sperm production and efficiency in cocks
Get PDFIn a 16-week feeding trial, an investigation was carried out with 240 sexually matured cocks of twenty 24 weeks of age to assess the daily sperm production (DSP) and sperm production efficiency (SPE) of cocks fed dietary monosodium glutamate (MSG) at varied inclusion levels (0.00, 0.25, 0.50, 0.75, 1.00 and 1.25 g/kg diet designated diets A, B, C, D, E and F, respectively). The cocks were weighed (1888.33 ± 44.10 kg) and allotted to the 6 treatment diets. Each treatment was replicated 5 times with 8 cocks/ replicate in a completely randomized design. At the end of the feeding trial, 2 cocks per replicate (i.e. 4 cocks per treatment) were humanely sacrificed and their reproductive tracts dissected. The testes were carefully sampled, weighed and processed for estimation of DSP and SPE using both histological and homogenate methods of analyses. Results showed that the inclusion of MSG at 1.25 g/kg significantly reduced the DSP under the two estimation methods (P<0.05). The SPE was equally significantly lowered at 0.75 g MSG/kg diet and above when determined using the homogenate method. It was also observed that MSG at 1.00 g/kg diet and above lowered the DSP and SPE when determined histometrically. A high positive correlation was established between the DSP and the testicular volume of the cocks. However, the paired testicular sperm reserves were not significantly influenced (P≥0.05). Sperm reserves in both testicles of the cocks fed diets B and C were similar to the control. This study therefore, suggests that MSG has a potential to significantly reduce the reproductive potentials of cocks when administered in excess of 0.75 g/kg diet.
DOI: http://dx.doi.org/10.5281/zenodo.396902
Haematological and serum biochemical indices of cocks drenched varying levels of clove powder (Syzygium aromaticum)
Get PDFThere is stimulated increased interest in the usage of consumer accepted natural alternatives such as phytogenic feed additive (PFAs) to improve livestock performance. Clove is a wonderful phytogenic feed additives with little information in its benefit in poultry production. This study was conducted to assess the effect of clove powder (Syzygium aromaticum) on haematological and serum - biochemical indices of cocks. Clove was obtained from a local market in Saki, Oyo State. Dried clove buds were cleaned and air dried for 24 hours prior to milling and stored in air-tight bags until the period of usage. Cocks (48 birds assigned into four treatments) were drenched at 0.0g (T1), 0.05g (T2), 1.00g (T3) and 1.5g (T4) after 2 weeks of acclimatization. Haematological parameters measured were: packed cell volume (PCV), red blood cell (RBC), white blood cell (WBC), haemoglobin (Hb), mean corpuscular volume (MCV), Mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentration (MCHC). While biochemical evaluated were total protein, albumin, globulin, uric acid, creatinine, cholesterol and glucose. Data obtained were subjected to one-way analysis of variance in a completely randomised design. RBC (3.64 – 3.76 X106/mL), Hb (3.64 – 12.86 g/dL), MCH (32.79 – 36.86 μμg) and MCHC (31.62 – 32.85%) showed significant difference (P<0.05), while PCV (39.00 – 41.00%), WBC (18.66 – 19.10 X109/mL), MCV (103.74 – 112.23 μ3) shows no significant difference (p>0.05). Total protein showed significant difference (P<0.05) with values ranging between 4.46 and 5.40 g/dL There exists significant difference (P<0.05) in the mean value of albumin, with highest value in 1.50g CP (5.40). Other biochemical parameters studied also showed significant differences (P<0.05) with the highest value in 1.50g CP. Drenching cocks with clove powder up to 1.5g was discovered posing no harmful effect on cocks
Acoustic structure of vocalization and stapedial muscle activity during vocal development in chickens (Gallus gallus)
No full textThe link between stapedius muscle activity and acoustic structure of vocalization was analysed in cocks of age 20-30 to 90-100 days old. The results show that stapedius muscle activation depends on the acoustic structure of vocalization and changes during vocal development. This dependence was observed in spontaneous calls and in vocalizations elicited by stimulating the mesencephalic "calling area". In 30-day-old cocks stapedius muscle EMG response is never associated with vocalizations with an acoustic energy content which is always distributed at frequencies higher than 2000 Hz. The coupling between vocalization and stapedius muscle activity begins later, when birds produce vocalizations with acoustic energy shifted towards lower frequencies. Overall, stapedius muscle activity is related to a bird's production of high amplitude low frequencies. These results support the hypothesis that the primary role of the stapedius muscle during normal vocal development is to dampen the amplitude of low frequency energy that reaches the cochlea during vocalization
Semen Characteristics of Local Breeder Cocks in the Sahel Region of Nigeria
No full textSemen characteristics of local cocks (60.9 ± 10.6 weeks old) in the Sahel region of Nigeria were recorded from May to September 1998. Mean values (± SD) were: semen volume 0.28 ± 0.14 ml, sperm concentration 2.26 ± 1.08 x 109 sperm/ml, total sperm count 0.64 ± 0.44 x 109 sperm/ejaculate, percentage of live spermatozoa 86.6 ± 8.4%, individual motility 73.9 ± 0.2%, pH 7.4 ± 0.2, and abnormal spermatozoa 11.6 ± 8.5%. Sperm concentration, total sperm count and semen volume were positively correlated (r = 0.25, 0.24 and 0.16, respectively) to the individual motility of the spermatozoa. The percentage of abnormal spermatozoa tended to decrease as the number of either motile or live spermatozoa increased (r = -0.42, r = -0.30). Significant (p < 0.05) variations in semen characteristics were observed between the cocks within the rainy season. Sperm concentration increased from May and peaked in August. The frequency distribution of the semen volume was bimodal with values of 0.13 and 0.38 ml. There was a positive correlation between the semen volume and the total sperm count, which suggested that the sperm output of the local cocks might be improved through selection for higher semen volume (0.38 ml)
The effect of dietary inclusion of Mansonia altissima on feed intake, feed efficiency, and feed conversion of laying birds and cocks
Get PDFAn experiment was conducted to determine the effect of dietary inclusion of Mansonia altissima on feed intake, feed efficiency, and feed conversion of laying birds and cocks. A total of 60 birds consisting of 48 layers and 12 cocks were used in a completely randomized design of four treatment groups, A, B, C,D of 15 birds each. Results showed that significant differences (P 0.05) in feed intake (consumption), but there were significant differences (P < 0.05) in feed conversion, betweentreatment groups. It was therefore concluded that M. altissima can be used as a growth promoter in chicken at the inclusion level of 30 g/kg feed without causing increased feed consumption by the bird
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The general principles of overreaching and the reforms of 1925
No full text1923-24 General Committee
No full textMounted black and white photograph. BACK: I A Hamilton, R D Hornabrook, N A Brooke, A E Leidig, P A Ohlstrom. MIDDLE: H M Lees, A H Lendon, Miss E Wigan, Miss G Ure, Miss L Morris, Miss M Hardy, T D Finey, C T Piper. FRONT: M T Cockburn, L C Maiden, A S Cocks, G M Hone, R H Wallmann, D A Dowling, M V Samuel, H Mc Birch, H G Prest
1922-23 General Committee
No full textBACK: C E Willing, L C Maiden, H M Rees, A E Leidig, H G Prest MIDDLE: R D Hornabrook, R O Fox, J D Finey, Miss L E Morris, A H Hennessy. A L Tostevin, Gillman FRONT: A B Barker, A S Cocks, C T Madigan, D A Dowling, H M Birch, M V Samuel, L D Cowlin
1924-25 General Committee
No full textMounted black and white photograph. BACK: N S Gunning, V Hackett, E Wigan, M Dotsch, I Davies, L Morris, E Casely, E Deland, R v Pridmore. MIDDLE: R T Harbison, W A J Nairn, G Tassie, D G McKay, T D Finey, G M Hone, W L Thomas, M V Samuel, F E Gallasch, H M Rees. FRONT: I A Hamilton, A H Lendon, A S Cocks, R H Wallmann, B S Muecke, B S Hanson, H G Prest
Pola Pertumbuhan Ayam Silangan Pelung Sentul Kampung Ras Pedaging (IPB D-1) G4 Umur 1-12 Minggu
Get PDFKampung chicken is a local Indonesian chicken that comes from red jungle chicken that has been successfully domesticated but has a low productivity. One of method to increase the productivity can be done by crossing a local chicken with a broiler. This research was conducted to examine the growth performance of crossing result G3 interse (pelung, sentul, kampung, broiler) age 1-12 weeks. IPB D-1 G3 chicken measured in this research were 76 DOC, 18 cocks, and 30 hens. T test was used to knowing the differences of body weight, body weight gain, feed consumption, and feed conversion. Based on the research, body weight, growth, and feed conversion of male IPB D-1 chickens was better than female IPB D-1 chickens when 12 weeks age. Body weight of a cock IPB D-1 G4 in 12 week was 1939.9 g and for a hen was 994.9 g. Feed consumption of rooster IPB D-1 G4 3 468.97 g and 3 339.80 in females with fluctuating body weight growth. Chicken feed conversion IPB D-1 lowest G4 1.579 and 6.430 with the highest. Coefficient of variation on all variables IPB D-1 G4 was high. Performance growth of IPB D-1 G4 still diverse
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