"We thought it had gone back to sea last night but with spring tides on the Dee there's a tidal bore which may have swept it back into the river," he said.
He also alerted people living downstream from Salgar to be on the look out for bodies which may have been swept along by the currents.
The cost of a single lawsuit, wrongfully prosecuted, may sweep away the earnings of years, and the reputation upon which he depends to meet the daily wants of life.
Despite this, the 'hard sweep' and polygenic models are not mutually exclusive, and the alleles with largest effect sizes may sweep to fixation [ 30].
This could potentially be explained by the size of the footprint of a selective event, such as a selective sweep, which may be undetectable at fine scales.
In addition to producing divergence at the target of selection, such adaptive evolution is often accompanied by a selective sweep, which may create additional genetic divergence between strains [ 10].
It is interesting that two anthrax toxin receptors, ANTXR1 (CEU vs. YRI) and ANTXR2 (EAS vs. YRI), show signatures of selective sweeps, which may indicate cases in human history of fights against specific infectious diseases.
In contrast to selective sweeps, which may sometimes focus upon a specific trait undergoing adaptive change, balanced polymorphisms are expected to commonly involve multiple traits and tradeoffs between them.
Such processes include the demographic history influencing incomplete lineage sorting (ILS), chromosome-specific histories, potential selective sweeps which may have created wider phylogenetically homogeneous regions, or potential balancing selection which may have caused reduced sizes of phylogenetically homogeneous regions (Ebersberger et al. 2007).
If so, once R. clivosus is recognised by these echolocation cues, R. capensis may switch to using shorter call durations to increase the production of FMt sweeps, which may allow R. capensis to better estimate its distance from and possibly track R. clivosus.
