A study was conducted in Northern Ethiopia to assess the sheep production system and factors affecting live sheep supply for quality meat. The survey was done in selected districts known for their high density of sheep population. The flock structure seems to be affected by the demand, requirement of breeding female, feed availability and the occurrence of disease and natural calamities. Farmer...

A diallel cross involving three Moroccan breeds of sheep (Sardi, Beni Guil, and D'man) was analyzed by least squares procedures. A total of 456 ewes were mated to 22 rams and this resulted in 528 lambs born from 412 ewes. D'man ewes had by far the highest general performance as measured by total weight of lamb weaned, even though the average live weight per lamb was the lowest for the three bre...

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...

The study aimed to investigate the effect of exogenous melatonin treatment on ewe’s and ram’s reproductive activity, out-of-season breeding, usually matching with spring. eighty four adult ewes 16 genitor rams Ouled Djellal breed, taken randomly out a 176 ovine flock were treated respectively 1 or 3 subcutaneous ear implants (Melovine). 76 non-treated remaining served as control group. rams, ke...

in this study 21721 pedigree records of iranian baluchi sheep registered during 30 years (1979 to 2008) at abasabad breeding station were used to estimate pedigree completeness level, inbreeding and average relationship coefficients of animals. during the studied years pedigree completeness level has a positive trend with the most recent cohort of lambs born in 2008 having pedigrees with 6.2 eq...

The objective of the study was to compare pregnancy rates after short-term and long-term synchroniza-tion protocol in Kivircik ewes. Ewes (n=54) were randomly divided into two synchronization groups as ST (short-term; n=27) or LT (long-term, n=27). Intravaginal sponge inserted on same day (D0) both groups. It removed at 7 days (D7) group 13 (D13) group. All ewes received 450 IU eCG 75 μg d-clop...

Rams express differences in sexual performance during the breeding season. Breeding rams with high sexual performance scores as measured during a sexual performance test can improve flock fertility. Whether selecting rams for high sexual performance score will indirectly improve ewe reproductive performance is not known. The objective of this study was to estimate the genetic correlation betwee...

In this study, pedigree data of 7170 lambs produced from 177 rams and 2182 ewes collected during 1989 to 2009 in the Shirvan Kordi sheep breeding station, were used for calculating inbreeding coefficients. The impact of inbreeding on the studied traits was investigated by including inbreeding coefficients for each animal as a covariate in the animal model. Average inbreeding coefficient of the ...

The yeast Candida albicans can mate. However, in the natural environment mating may generate progeny (fusants) fitter than clonal lineages too rarely to render mating biologically significant: C. albicans has never been observed to mate in its natural environment, the human host, and the population structure of the species is largely clonal. It seems incapable of meiosis, and most isolates are ...

the group size and behavior of goitered gazelle was studied over the year 2001 in kalmand-bahadoran protected area. gazelle groups showed no stable organization in kalmand protected area. in spring season, group size was smaller than other seasons and the largest groups were seen in winter. number of solitary gazelles increased during the mating season. adult males were territorial in mating se...