نتایج جستجو برای: reproductive number
تعداد نتایج: 1251317 فیلتر نتایج به سال:
background: in kazakhstan, as in many other countries, a transformation of the traditional stereotypes of reproductive behavior, and change the types of family relationships is occurred. it is caused by social status changes, by the transformation of women's valuable orientations and social-role attitudes. the objective of this study was to identify the indicators of reproductive units and the ...
abstract previous researches have shown success of growth hormones usage on flower production increase, pod and prevention of abscission of them in some of the pulses. two tests were done, in order to find out the effects of growth hormones to on flower production increase, pod and chick pea yield composites in farmer conditions (2010-11) and green house conditions as factorial on the proje...
Background & Aim: Osteoporosis is one of the most common diseases in middle-aged and elderly women, that imposes high costs on family and society. Acquiring knowledge about factors related to this disease such as reproductive risk factors, could help health care professionals to prevent osteoporosis and provide better services. Material & Method: A cross-sectional study was performed to det...
Chancroid is a highly infectious and curable sexually transmitted disease caused by the bacterium Haemophilus Ducreyl (also known as H. Ducreyl). A deterministic mathematical model for investigating the role of treatment on controlling chancroid epidemic is formulated and rigorously analyzed. A threshold quantity known as the productive number, which measures the number of secondary infections ...
Solicitation signals by offspring are well known to influence parental behaviour, and it is commonly assumed that this behavioural effect translates into an effect on residual reproduction of parents. However, this equivalence assumption concerning behavioural and reproductive effects caused by offspring signals remains largely untested. Here, we tested the effect of a chemical offspring signal...
s ..........................................................................................................8 Round table discussion ....................................................................................20 Speakers .........................................................................................................26 Participants ..................................................
Various theories have been posed to explain the fitness payoffs of hunting success among hunter-gatherers. 'Having' theories refer to the acquisition of resources, and include the direct provisioning hypothesis. In contrast, 'getting' theories concern the signalling of male resourcefulness and other desirable traits, such as athleticism and intelligence, via hunting prowess. We investigated the...
the reproductive performance of a dairy herd has a significant effect on the profitability of that herd. common measures of reproductive performance are days to first service, days to conception, calving interval, services per conception, conception rate, estrus detection rate, and pregnancy rate. most cow operations would benefit economically by reducing the number of operational days, decreas...
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