نتایج جستجو برای: reproductive potential
تعداد نتایج: 1153431 فیلتر نتایج به سال:
Abstract Learning ability, which allows individuals to adjust their behaviour changing environmental conditions, has a considerable positive impact on individual fitness. However, in addition benefits, learning also incurs cost, means that investment and maintaining learned skills can lead trade-offs impacting other biological functions. Here, we tested whether trade-off exists between reproduc...
Over the past decade, there has been an increase in the development and/or in the improvement of emerging reproductive technologies in pigs. Among emerging reproductive technologies with potential short-term application in pig production are: artificial insemination with low number of spermatozoa, cryopreservation of spermatozoa and embryos, sperm sexing, and non-surgical embryo transfer. The f...
This paper introduces two new demographic parameters, the entropy and the reproductive potential of a population. The entropy of a population measures the variability of the contribution of the different age classes to the stationary age distribution. The reproductive potential measures the mean of the contribution of the different age classes to the growth rate. Using a relation between these ...
There is a significant public health concern about the potential effects of occupational exposure to toxic substances on reproductive outcomes. Several toxicants with reported reproductive and developmental effects are still in regular commercial or therapeutic use and thus present potential exposure to workers. Examples of these include heavy metals, organic solvents, pesticides and herbicides...
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