Background: Motile sperm is essential for successful embryo production. The aim of the present study was to compare the in vitro embryo development following isolation of Ram epididymal sperm isolation by swim up (SP) or Histoprep® continuous gradient (HP). Materials and Methods: Ram testes-epididymis were provided from the local slaughterhouse and transported to the lab. Sperms were recovered ...

Beckmann [1] derives bounds on the length of reduction chains classes simply typed λ-calculus terms which are exact up-to a constant factor in their highest exponent. Afshari et al. [2] obtain similar acyclic higher-order recursion schemes (HORS) by embedding them and applying Beckmann's result. In this article, we apply proof strategy directly to HORS, proving exactness chain obtaining size la...

Scrapie is one of several transmissible spongiform encephalopathies of livestock. Disease susceptibility is linked to polymorphisms in the normal prion protein gene that encodes the mammalian prion precursor. Codon 171 of this gene is a major determinant of scrapie susceptibility. Selection for arginine (R) at codon 171 is encouraged by the USDA to decrease the incidence of scrapie. Objectives ...

The effects of (i) herbage allowance, (ii) frequency of allocation and (iii) grass silage feed value on ewe and lamb performance were studied in mid-gestation ewes. Furthermore, the effects of (i) herbage allowance, (ii) frequency of allocation and (iii) grazing date and their interactions on subsequent herbage yield and feed value were also evaluated. Swards, which had a cut of silage removed ...

Commercial lentil screenings (LS) were substituted for barley grain and canola meal, and the resulting experimental diets (0, 12.5, 25 and 33% LS; 17±18% CP dry matter) were evaluated in situ and in digestibility and feedlot studies using Romanov Suffolk lambs. Mature Suffolk, Dorset and Rambouillet ewes were used to evaluate LS or whole barley as protein/energy supplements for ewes in mid-gest...

BACKGROUND Selenium is part of the antioxidant defence system in animals and humans. The available selenium concentration in soil is low in many regions of the world. The purpose of this study was to evaluate the effect of organic versus inorganic selenium supplementation on selenium status of ewes, their lambs, and slaughter lambs. METHODS Ewes on four organic farms were allocated five or si...

The study involved 120 crossbred ewes (sixty 1.5 years old animals and sixty 2.5 years old animals; initial liveweight 67.6 kg, condition score 3.7), that were mated in October. They were assigned to six treatments (two shearing treatments (shorn and unshorn) × two silage feed values (low and medium) and two extended grazed herbage allowances (1.0 and 1.8 kg dry matter (DM)/day)) designed to ev...

Objectives were to estimate effects of sire breed (Dorset, Finnsheep, Romanov, Texel, and Montadale), dam breed [Composite III (CIII) and northwestern whiteface (WF)], mating season (March and May), and their interactions on reproductive traits of mature F1 ewes in spring mating seasons. A total of 1,099 F1 ewes produced 1,754 litters of 2,995 lambs from exposures to Suffolk rams during March a...

pseudoparasitus talebii nemati, malekshah-koohi & afshari n. sp. is described and illustrated based on female specimens collected from soil in golestan province, gorgan region, iran. the definition of pseudoparasitus oudemans is revised and new definition is presented.

The objective of this study is to identify and characterize the different types livestock systems in region Sfissifa, wilaya Nâama (Western Algeria). To end, 50 farmers were surveyed region, results field investigations revealed three main categories farmers: semi-sedentary sedentary farmers, small large farmers. had acquired at least one level education thanks reforms undertaken by public auth...