In regard to territorial variations, Federici showed that the reluctance to marry on these two days was evident in all Italian regions.
It is therefore unlikely that there would be any significant intra-territorial variations.
Results based on their respective accessibility profiles show differences between the two cities in both global variation and territorial and temporal distribution.
Intransitive patterns of territorial success could maintain variation in aggressive strategies if there is a preference for territorial males.
If there were a direct relationship between territorial success and fitness, this variation would be expected to be depleted [7].
In fact, House Ways and Means Committee Chair Dave Camp, R-Mich., has proposed at least three variations of a territorial tax.
Here, we have studied the genetics of the variation in outcomes of territorial interactions between males, and, in the context of the outcomes of these interactions, the relative mating success of these males with females of different genotypes.
However, theoretical models and a growing number of empirical studies have begun to link population variation in mating and territorial signals to neutral genetic differentiation among populations [ 14- 20].
Consequently, variation in intensity of territorial interactions between individuals related to differences between habitats in territory density may potentially explain population differences in song.
Differences in the cost functions may then emerge basically in the presence of economies of scale (explained below) and of a degree of spatial variation of preferences across territorial units (Marks and Hooghe 2000).
