نتایج جستجو برای: reproduction success
تعداد نتایج: 233624 فیلتر نتایج به سال:
The ovarian aging, a dynamic process that precedes the clinical manifestations of menopause, can be assessed using ovarian reserve biomarkers. It is well-known that reproduction during the later years of reproductive life has known limitations that challenge the success of assisted reproduction. Therefore, a review of the neuroendocrine modifications during this critical period of reproductive ...
The frequency of extreme meteorological events such as heat waves and rainstorms is predicted to increase with climate change. However, there is still little information about how extreme weather influences reproduction in animals. It may not only affect breeding success but might also alter offspring sex ratio if males and females are differentially sensitive to meteorological conditions durin...
How an animal performs in its natural environment ultimately plays a key role in its reproductive success. While a number of studies have investigated how selection acts on performance-related traits, far fewer studies have examined the mechanisms responsible for variation in performance. Among mechanisms, variable morphology has received the most attention. Although physiological traits have r...
The economic opportunity hypothesis states that perceived shrinkage of opportunity discourages women or couples from embarking on marriage or reproduction. On the contrary, the sense that opportunity is expanding encourages couples to raise their family-size target. The hypothesis assumes that humans are genetically programmed to maximize successful reproduction by having more offspring when en...
The fields of concert hall acoustics and sound reproduction are traditionally studied separately, with little interaction between them. However, it is apparent that a great deal can be gained from combining the two disciplines, as long as the differences are considered. Firstly, the perceived spatial impression afforded by the two acoustical situations is reviewed, and the similarities and diff...
The physiology of reproductive senescence in women is well understood, but the drivers of variation in senescence rates are less so. Evolutionary theory predicts that early-life investment in reproduction should be favoured by selection at the cost of reduced survival and faster reproductive senescence. We tested this hypothesis using data collected from preindustrial Finnish church records. Re...
Multiannual delayed gametophyte cultures can stay vegetative for years, while also having the ability to grow. This study aims investigate whether male and female multiannual strains of species Saccharina latissima Alaria esculenta grow at different rates in culture. We furthermore assessed how changing sex ratios affect reproductive yields these cultures. The results indicate that yield declin...
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