objective: estimation of genetic parameters for kleiber ratio (kr) and genetic trends for pre-weaning weights of arabi sheep has not been previously conducted.methods: data and pedigree information were collected at the khuzestan ramin agricultural and natural resources university, animal science research station, located in southwest iran, from 2001 to 2008. (co)variance components and corresp...

The aim of the present study was to analyze the live weight, body length, and chest perimeter in Blackhead Pleven lambs at an early age with a view to their future use as prognostic indicators of growth performance. The study was conducted with 46 lambs. It found out that at birth and weaning the singletons had higher live weight and higher average daily weight gain in comparison with the twins (P

A total of 28 litters (241 × 600, DNA) and 356 nursery pigs DNA; initially 12.5 lb) were used in 28-d trial (4-d pre-weaning 24-d post-weaning) to determine the effect providing enrichment cubes (supersized pellets that resemble cattle range size from 1.1 2.0 in. length 0.6 0.8 diameter) suckling late lactation after weaning on post-weaning feed intake growth. Treatments arranged a 2 factorial ...

The objective of this study was to compare body weight, ADG, and feed:gain ratio of antibiotic-free pigs from Yorkshire dams and sired by Yorkshire (YY), Berkshire (BY), Large Black (LBY) or Tamworth (TY) boars. All the crossbred pigs in each of three trials were raised as one group from weaning to finishing in the same deep-bedded hoop, providing a comfortable environment for the animals which...

This study aimed to investigate the differences among four medium breeds of rabbits (Rex, New Zealand White, California and Baladi Red) in productive performance and semen characteristics. Hundred twenty does, 7–9 months of age and 3–3.5 kg body weight from Rex, NZW, California, and Baladi Red. The numbers of 360 parities were analyzed to evaluate breeds effects. Traits studed were litter size ...

Data were collected from 366 litters produced in a four-breed (Duroc, Yorkshire, Spotted and Landrace) diallel mating system. Purebred and crossbred litters were farrowed during five consecutive (fall and spring) farrowing seasons (fall 1976 through fall 1978). Litters were produced by randomly mating boars of each breed to at least one female of each breed. Litter size and weight at birth, lit...

A grazing study was initiated in April 2000 and continued through three calving and weaning cycles (ending July 2003) to investigate the effects of rotational grazing management (twice monthly [2M] vs. twice weekly [2W]) and weaning date (mid-April [EARLY] vs. early June [LATE]) on production of fall-calving cow-calf pairs (495 +/- 9.6 kg initial BW) grazing Neotyphodium coenophialum-infected t...

A total of 28 litters (241 × 600, DNA) corresponding with 355 nursery pigs DNA; initially 13.0 lb) were used in 42-d trial (17-d pre-weaning and 24-d post-weaning). This was conducted to determine the effect providing a sensory attractant liquid (BlueLite Pro2Lyte; TechMix Global; Stewart, MN) suckling on underline sows after farrowing late lactation, weaning post-weaning feed intake growth. Tr...

On farm monitoring of central highland goats were conducted in Sekota district of the Amhara regional state, Ethiopia to evaluate the growth performances under the traditional management practices. On farm feeding trial was also conducted to see the feeding performances and carcass characteristics of Central Highland goat types. Data used for the study was collected from randomly selected on-fa...

Analyses of birth and weaning weights, fleece weights of ewes, and number born per litter of Polypay sheep collected at the U.S. Sheep Experimental Station from 1978 through 1998, confirmed previous analyses of three other dual-purpose breeds that cytoplasmic effects do not contribute to variation in these four traits. In general, estimates of genetic parameters that would be needed for nationa...