Secondary contact with the head after a legal check will still be permitted.
Rating secondary contact was also challenging in the hockey study as it was in the current study.
Collectively, the data reveal a complex history of isolation followed by secondary contact shaping the current intraspecific diversity.
This led him to suggest that the two groups had previously been isolated, but were probably hybridising following secondary contact.
Secondary contact and subsequent introgression would therefore explain our results.
The mutant at the preference locus is introduced after secondary contact is established.
We compared the allele frequencies between successive generations starting with the first generation after secondary contact.
We test this by comparing mating frequencies of beetles, raised on different resources/hosts, over successive generations in secondary contact.
Morphologically conservative lineages of RED are currently in secondary contact in the central Wet Tropics (Figure 1B).
We analyze the stability of this postzygotic isolation just after secondary contact and in the absence of sexual selection.
Upon secondary contact such divergence may cause premating isolation.
