However adding more variables increases complexity and showing the distribution of a categorical variable over multiple waves of a longitudinal survey is not feasible.
The concentration of Se is more variable, both increases [ 26, 12] and decreases [ 14] have been reported at parturition, relative to the dry period.
Highly non-linear responses would buffer variation in Hsp90-dependent signaling over a wide range, while over a narrow range of signaling near trait thresholds become more variable with increasing probability of triggering all-or-none developmental responses.
Because phenotypic plasticity itself can evolve in some traits, often independently from the trait mean (Schenier 1993; Pigliucci 2005), we might expect that populations could become more plastic if future conditions become more variable and plasticity increases fitness (De Jong 1995).
This strong correlation between singing and FoxP2 down-regulation during the developmental time period when song is more variable, and the increased vocal variability of FoxP2 knock-down birds [35] motivated our hypothesis that FoxP2 acts as a 'plasticity gate'.
The introduction of more variables may increase the computational complexity sharply, and thus make the method not work for large polynomial inequalities.
Although these data are more variable, deaths have increased by an average of 33% per year between 1995 and 2000.
Using more shape variables increases the amount of information about variation patterns in the model, but also increases the number of parameters, causing problems for estimation.
However, factors such as warmer and more variable temperature regimes and increases in fine sediment often initiated a shift of aquatic invertebrate community composition to those more closely associated with open pasture sites.
