oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 4 )

2019 ( 5 )

2018 ( 18 )

2017 ( 14 )

Custom range...

Search Results: 1 - 10 of 1612 matches for " sheep "
All listed articles are free for downloading (OA Articles)
Page 1 /1612
Display every page Item
Impact of environmental and social factors on genotypic and phenotypic diversity of some local Sudanese sheep breeds  [PDF]
Nahid Gornas, Abdel Rahim M. EL Hussein
Open Journal of Animal Sciences (OJAS) , 2012, DOI: 10.4236/ojas.2012.22018
Abstract: This mini review aimed to discuss and compare the findings of a genotypic study done by Gor-nas et al., 2011 and some environmental and social factors discussed previously in Sudan. The main conclusion was the agreement of the genotypic analysis with the previous observations done on the phenotypic part. The important recommendation was to support the nomadic system so as to preserve the biodiversity of livestock in Sudan.
Cryptorchidism in Sheep: A Clinical and Abattoir Survey in the United Kingdom  [PDF]
Keith C. Smith, Peter J. Brown, Frances J. Barr, Tim J. Parkinson
Open Journal of Veterinary Medicine (OJVM) , 2012, DOI: 10.4236/ojvm.2012.24044
Abstract: This paper describes features of a study of different aspects of cryptorchidism in sheep in different parts of England. A total of 83 crytorchid testes (57 unilateral and 13 bilateral) were recognised in 70 animals post-slaughter at three abattoirs in the south west of England between June 2000-January 2004. Abdominal cryptorchids (60) were common than inguinal (23); 69% percent of cases were unilateral. External examination for cryptorchidism was carried out on 5134 young male lambs carried out in 2001 at Foot and Mouth Disease disposal sites, and on farms, during the UK outbreak of the disease. A total of 29 cases of cryptorchism [0.56%] were detected; 86% of cases were unilateral. In both situations the right testis was more commonly affected than the left.
Morphology of the Temporomandibular Joint (TMJ) of Sheep (Ovis aries)  [PDF]
Amol S. Patil, Gunit K. Bindra
Open Journal of Veterinary Medicine (OJVM) , 2012, DOI: 10.4236/ojvm.2012.24039
Abstract: The detailed anatomy of TMJ of sheep was explored so that it could be used as an experimental animal for study of condylar growth. The experimental animal was a 3 month old sheep, head of which was procured from a local abettor. The results showed that the sheep is an excellent experimental model for the study of condylar growth, with and without the use of functional appliances, because of similarity in anatomy related to size, shape and position of the condyle to that of human beings. Thus, it is concluded that the study will help future investigators in the field of dentistry to consider the sheep as an experimental animal for further research.
Heat Production Partition in Sheep Fed above Maintenance from Indirect Calorimetry Data  [PDF]
Patricia Criscioni, María del Carmen López, Victor Zena, Carlos Fernández
Open Journal of Animal Sciences (OJAS) , 2015, DOI: 10.4236/ojas.2015.52011
Abstract: The objective of this study is to compare the partition of heat energy (HE) in two sheep breeds by indirect calorimetry and integral calculus. An experiment was conducted with two Spanish native sheep breeds (dry and non-pregnant) which were fed with pelleted mixed diets above maintenance. Six Guirras and six Manchegas breed sheep were selected (58.8 ± 3.1 and 60.2 ± 3.2 kg body weight, respectively). All sheep were fed with the same concentrate mixed ration (0.300 kg cereal straw as forage and 0.700 kg concentrate) in two meals. Half the daily ration was offered at 800 h and another half at 1600 h. The sheep had free access to water. Sheep were allocated in metabolic cages; energy balance and gas exchange were assessed in each sheep. The statistical analyses included the fixed effect of breed and random effect of sheep. The metabolic energy (ME) for maintenance represented 69% of the total ME intake and the average was 354 kJ per kg of metabolic body weight (kg0.75 BW) on average. The basal metabolism (HeE) was greater (P < 0.05) in Guirra than Manchega breed (270 ± 18 vs. 247 ± 15 kJ/kg0.75 BW and day). As sheep were fed with above maintenance, the retained energy in the body accounted for 22% of the ME intake and 77% of the ME intake was lost as heat. 51% of the MEI was converted to HeE; 5% was lost as physical activity of standing and lying down (HjE), and 13% was associated with the process of feeding and work of digestion and metabolism (HdE). Within HdE, 47% represented the cost of intake and feeding and 54% the cost of digestion and metabolism. No differences in HE partition between breeds were found, although Guirra breed showed less efficiency of energy retention than Manchega breed. Therefore, this study demonstrated a tentative approach of partitioning HE, combining indirect calorimetry and integral calculus.
Evaluation certain environment factors on wool characteristics of Arabi sheep breeds  [PDF]
Nosratollah Taherpour, Mahnaz Salehi, Farhad Mirzaei
Open Journal of Animal Sciences (OJAS) , 2012, DOI: 10.4236/ojas.2012.21002
Abstract: Evaluation and grading of wool based on sex and age can help to improve economic value of wool. This study was conducted to investigate the wool production and fleece characteristics of Arabi sheep in Khuzestan province The right mid-side wool samples were taken from 90 Arabi sheep (1 - 4 years; 16 male and 74 female) by hand shearing. The staple length of shoulder, flank and rump were 13.18 ± 0.27, 13.31 ± 0.22 and 14.27 ± 0.25 cm, respectively. The greasy fleece weight, wool wax, vegetable matter, yield percentage, fiber diameter and its coefficient variation measures were 1.72 ± 0.06 Kg; 2.77% ± 0.12%; 0.54% ± 0.07%; 73.36% ± 0.68%; 30 ± 0.41 μm; 30.23% ± 0.3% respectively. Correspondingly, the medulated fibers, true wool fiber and Kemp fibers were 21.6% ± 1.9%, 76.1% ± 2.04% and 2.5% ± 0.57% respectively. Age and sex had a significant influence on staple lengths. Fleece weight (P < 0.01) and wool wax were (P < 0.05) affected by sex. There was no significant interaction between age and sex groups for fiber characteristics, but it was important for staple between body location (P < 0.05). There were a low considerable kemp and CV of wool diameter percentage on Arabi sheep in comparison with the other Iranian native sheep. The wide variation in fleece weight (0.8 - 3.9 kg); mean staple lengths (8.8 - 19.2 cm); medulated and kemp (0 - 84.04 and 0% - 30.22%); fiber diameter (24.9 - 37.43 μm) suggest potential for improvement of economical traits.
Isolation of Moraxella sp. from Cases of Keratoconjunctivitis in an Organized Sheep Farm of India  [PDF]
Kumaragurubaran Karthik, Kaliyaperumal Manimaran, Ramalingam Mahaprabhu, Kulasekaran Shoba
Open Journal of Veterinary Medicine (OJVM) , 2017, DOI: 10.4236/ojvm.2017.710014
Abstract: Keratoconjunctivitis in sheep causes severe ocular irritation thereby reducing the production performance thus causing economic loss to the farmers. Bacterial cause of keratoconjunctivitis in sheep may be due to Listeria monocytogenes, Moraxella ovis, Mycoplasma conjunctivae, etc. An investigation carried out at Tirupathur, Sivagangai district, Tamil Nadu, India revealed keratoconjunctivitis in sheep (population 100 animals). Isolation and identification of eye swabs from ailing animals (n = 5) showed that the bacteria was Moraxella sp. Polymerase chain reaction (PCR) of the isolate was positive for Moraxella sp. Antimicrobial sensitivity testing of the isolate showed that it was sensitive to all antibiotics used in the study. This study reports the presence of Moraxella sp. infection in sheep warranting further studies to know the exact status of this organism so as to prevent keratoconjunctivitis in sheep.
Amélioration des ovins dans l'Ouémé et le Plateau en République du Bénin. Enjeux de croisement des ovins Djallonké avec les moutons du Sahel
Gbangboché, AB.,Abiola, FA.,Laporte, JP.,Salifou, S.
Tropicultura , 2002,
Abstract: Sheep Management in Oueme and Plateau Departments of Republic of Benin. Stakes of Djallonke Crossbreeding with Sahelian Sheep. The present study is a reflection through bibliographical review and on the current situation of sheep breeding in Oueme and Plateau of Benin. This study situates the crossbreeding of Djallonke with Sahelian sheep and prospects some strategies that could be adopted in the context of sheep breeding in Oueme and Plateau of Benin.
Eficiência do protocolo ovsynch em ovelhas da ra?a Santa Inês
Oliveira,M.E.F.; Rodrigues,L.F.S.; Almeida,O.M.; Cordeiro,M.F.; Moura,A.C.B.; Sousa,H.L.L.; Loureiro,F.N.; Teixeira,P.P.M.; Penha Filho,M.M.; Vicente,W.R.R.;
Archivos de Zootecnia , 2009, DOI: 10.4321/S0004-05922009000200013
Abstract: twenty six santa inês ewes were asigned to three treatments to evaluate the efficiency of the ovsynch protocol. in the treatment 1 - control (n= 8), the estrus was synchronized with sponges containing 60 mg map for 14 days. on d14, 300 iu ecg were administered. in treatment 2 (n= 9) the ovsynch protocol was used: 25 μg of gnrh (d0), 37.5 μg of pgf2a (d7) and 25 μg of gnrh (d9). in treatment 3 (n= 9) the modified ovsynch protocol was used: the administration of pgf2a and second gnrh as two days early. estrus detection was accomplished using teaser. all ewes were mated twice with 12 hours of interval. pregnancy rate (pr) was evaluated by ultrasonography 30 days after the end of mating. estrus response was of 88.46% on average, and without differences among treatments (p>0.05). the interval for onset of estrus was greater (p<0.05) in t1, when compared with t2 and t3 (41.31±7.2, 13.37±8.42 and 6.75±5.2 h, respectively). the time of receptivity was greater (p<0.05) in females of t1 and t3 (40.5±6.49 h and 53.68±10.27 h, respectively), compared to females of t2 (34.56±7.2 h). the duration of the induced estrus did not differ significant among treatments (p>0.05). pregnancy rate was significantly greater (p<0.05) in ewes synchronized with ovsynch protocol (37.5%, 62.5% and 25% for treatment 1, 2 and 3, respectively). the results show superior efficiency of the ovsynch protocol, under the experimental conditions.
Dairy Sheep Nutrition
Rosanna Scipioni
Italian Journal of Animal Science , 2010, DOI: 10.4081/ijas.2005.203
Abstract: This book, edited by the colleague Giuseppe Pulina, is the result of the project "Further development of a diet formulation model for sheep and goat", supported by the Ministry of Agricultural and Forestry Policies, in Italy.
Productive performance and blood metabolites as affected by protected protein in sheep  [PDF]
A. A Abdel-Ghani, G.M. A Solouma, A. K. I Abd El moty, A. Y Kassab, E. B Soliman
Open Journal of Animal Sciences (OJAS) , 2011, DOI: 10.4236/ojas.2011.12004
Abstract: This investigation included two experiments. Experiment 1 was executed to study the effect of feeding different rations of protected protein of canola meal on digestibility and nutritive values within sheep. Twenty male, healthy sheep were divided into five treatments according to the methods of protein protection (control, heat, sodium hydroxide, formaldehyde, and acetic acid treatments). Experiment 2 was carried out on developing lambs to investigate the effect of protected protein on growth performance and some blood metabolites. Animals in this ex-periment were also divided into the same treatments as Experiment 1. Animals in the first and second experiment were fed concentrate ration (80%) and wheat straw (20%) to cover the feed requirements. Nutritive values expressed as total digestible nutrients (TDN %) and digestible crude protein (DCP%) of the experimental rations was calculated. In the second experimental all animals were weighed biweekly and the amounts of rations were adjusted throughout the experimental period (120 days) according to their body weight change. Results indicated that in the first experimental protected protein by heat (HE) and sodium hydroxide (NH) had positive (P<0.05) effects on most of digestibility coefficients of different nutrients. Protein protection methods also improved (P<0.05) the nutritive values (TDN and DCP) in the HE treatment and NH treatment. In the second experiment body weight increased by 14% and 7% and also daily gain by 27% and14 % in HE and NH, respectively, while FM and AC decreased body weight by 8% and 4.4%. Higher values (P<0.01) in both thyroid hormones were observed in HE and NH than those other treatments. Also, higher values (P<0.01) of total protein, albumin, and glucose were observed in HE and NH than other treatments. The control (CTL) group recorded higher concentrations of urea-N and creatinine at different periods of the experiment in comparison with other treatments. Generally, from the present investigation it can be concluded that protected protein of canola meal by heat or sodium hydroxide treatments were more efficient for productive performance and some blood metabolites of sheep.
Page 1 /1612
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.