نتایج جستجو برای: zandi ewes

تعداد نتایج: 5122  

Journal: :Journal of animal science 2011
A M Meyer J J Reed T L Neville J F Thorson K R Maddock-Carlin J B Taylor L P Reynolds D A Redmer J S Luther C J Hammer K A Vonnahme J S Caton

The objectives were to investigate effects of nutritional plane and Se supply during gestation on yield and nutrient composition of colostrum and milk in first parity ewes. Rambouillet ewe lambs (n = 84, age = 240 ± 17 d, BW = 52.1 ± 6.2 kg) were allocated to 6 treatments in a 2 × 3 factorial array. Factors included Se [adequate Se (ASe, 11.5 µg/kg of BW) or high Se (HSe, 77.0 µg/kg of BW)] ini...

Journal: :Acta Veterinaria Scandinavica 2008
Kristín B Gudmundsdóttir Jakob Kristinsson Sigurdur Sigurdarson Tryggvi Eiríksson Torkell Jóhannesson

BACKGROUND Preliminary studies indicated decreased glutathione peroxidase (GPX) activity in blood of ewes on scrapie-afflicted farms. Other studies have shown decreased GPX activity in brain of prion-infected mice and in prion-infected cells in vitro. The aim of this study was to examine the GPX activity in blood as well as the distribution of GPX-activity levels from ewes on farms in scrapie-a...

Journal: :Journal of animal science 2001
A Sevi L Taibi M Albenzio A Muscio S Dell'Aquila F Napolitano

The experiment involved 40 mid-lactating Comisana ewes. The animals were housed in straw-bedded pens and assigned to a control group (n = 10) and two test groups of 15 subjects each. Control ewes were never moved from their pen and peers throughout the experiment period, whereas test animals were subjected to either regrouping (RG) or regrouping and relocation (RGRL) three times at weekly inter...

Journal: :Journal of animal science 2015
K A Leymaster C G Chitko-McKown M P Heaton

Production and well-being of sheep and goats in many countries are harmfully impacted by small ruminant lentiviruses (SRLV) that cause incurable, progressive diseases. Susceptibility to ovine progressive pneumonia virus (OPPV), the North American form of SRLV, is influenced by variants of the ovine transmembrane protein 154 gene (TMEM154). The experimental objective was to estimate additive and...

2003
D. Pant

Large offspring syndrome (LOS) may be initiated in ovine embryos after exposure to in vitro conditions. The objective of this study was to compare various parameters of the gravid uterus on day 140 after fertilization: (i) in ewes (n=4) bred naturally, and in ewes (n=18) after transfer of embryos produced in vitro, and (ii) in single, twin and triplet pregnancies after transfer of in vitro prod...

2015
M.S. Medan T. EL-Daek

The objectives of the present study were to determine the time of uterine involution and ovarian activity using ultrasound examination and progesterone assay. Weekly progesterone levels were measured starting one week postpartum until two weeks after the 1(st) postpartum estrus in Barbary ewes lambed during winter in AL-Bayda city, north of Libya. A total of 15 Barbary ewes were used in the pre...

Journal: :Journal of animal science 1987
N L Martin E O Price S J Wallach M R Dally

Lamb-specific odor is used by ewes to discriminate between their own and alien offspring. Recent studies have demonstrated that fostering can be facilitated by transferring own-lamb odor to alien lambs via cloth stockinettes. The objective of the present study was to investigate the effectiveness of the odor-transfer technique in enticing ewes with a single lamb to adopt an additional lamb ("ad...

Journal: :Journal of animal science 1984
K P Cochran D R Notter F S McClaugherty

Data from 644 exposures and 552 lambings were used to analyze reproductive traits of 1/2-Finnish Landrace, 1/2-Dorset ewes (1/2 Finn); 1/4-Finnish Landrace, 3/4-Dorset ewes, (1/4 Finn) and Dorset ewes. Ewes were exposed to Hampshire or Suffolk rams for spring lambing from 1973 to 1978. The analytical model included fixed effects of ewe birth year (EBY), ewe breed (BR), lambing year within EBY a...

ژورنال: تحقیقات دامپزشکی 2007

The aim of this study was to determine changes in the concentration of leptin and thyroid hormone in energyrestricted ewes and effect of leptin injection on thyroid hormone level. In the first experiment, 28 ewes were assigned to two groups(n=14). Ewes were fed by a ration that provided 60% or 100% of maintenance energy requirements during 71 days. Blood samples were collected and body w...

Journal: :Biology of reproduction 2000
J Pelletier L Bodin E Hanocq B Malpaux J Teyssier J Thimonier P Chemineau

To determine whether a link exists between reproductive seasonality and the structure of the gene for melatonin receptor Mel(1a), the latter was studied in two groups of Mérinos d'Arles (MA) ewes previously chosen for their genetic value, which took into account their own out-of-season ovulatory activity adjusted by environmental parameters and that of their relatives. The genomic DNA of 36 ewe...

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