This study aims at investigating the effectiveness of utilizing barley as a Flushing ration with an energizing source and soybean meal-based diets as a Flushing ration with a protein source the sexual and breeding behaviors in Ghezel sheep. To this end, 36 three and half-year old ewes (51±1.5 kilograms) with the record of giving birth to two lambs and 6 three-year old (89±2.5 kilograms) rams we...

This study aims at investigating the effectiveness of utilizing barley as a Flushing ration with an energizing source and soybean meal-based diets as a Flushing ration with a protein source the sexual and breeding behaviors in Ghezel sheep. To this end, 36 three and half-year old ewes (51±1.5 kilograms) with the record of giving birth to two lambs and 6 three-year old (89±2.5 kilograms) rams we...

Castration of male animal's leads to a reduction in aggressive behavior, which animals will avoid wasting energy resulting to economic production of the animal, grows. It also reduces damage and bruising animals and increases normed meat producing at slaughter. In this study, 20 lambs Ghezel breed in four age groups, group 1: one month (n = 4), group 2: two months (n = 4) Group 3: three months ...

background: the hormones of hypothalamo-pituitary-gonadal (hpg) axis have facilitative effects on reproductive behavior in mammals. ghrelin as a starvation hormone has an inhibitory effect on hpg axis’ function. hence, it is postulated that ghrelin may reduce the sexual behavior through inhibiting of hpg axis. the aim of this study was to examine the effects of ghrelin and its antagonist, [d-ly...

human immunodeficiency virus (hiv) is a public health challenge facing both developing and developed nations. although injecting drug use is even the main route of hiv transmission in iran, sexual route is rising gradually. vulnerable women have been considered as important bridging population for driving hiv epidemics. to increase the access to vulnerable women, in 2007, 5 pilot centers were e...

CONTEXT Considerable research has examined reciprocal relationships between parenting, peers and adolescent problem behavior; however, such studies have largely considered the influence of peers and parents separately. It is important to examine simultaneously the relationships between parental monitoring, peer risk involvement and adolescent sexual risk behavior, and whether increases in peer ...

Since Darwin, the nature of the relationship between evolution and domestication has been debated. Evolution offers different mechanisms of selection that lead to adaptation and may end in the origin of new species as defined by the biological species concept. Domestication has given rise to numerous breeds in almost every domesticated species, including chickens. At the same time, so-called ar...